74577371 Robot RC Element Design 1 Beam

Autodesk Robot Structural Analysis Tnh ton ct thp cho cc cu kin

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TNH TON CT THP CHO CC CU KIN RC ELEMENTS DESIGN

Phn tnh ton thit k cc cu kin b tng ct thp rt cn thit cho cc k s xy dng. Robot Structural Analisys gip chng ta tnh ton thit k cc cu kin b tng ct thp nh dm, ct, mng, tng mt cch t ng hoc b tr thp th cng. Kt qu chng ta chn c thanh thp v cch b tr hp l tha mn cc yu cu v chu ti.

khi ng m un ny, chng ta thc hin nh sau: 1. Ra lnh bng mt trong cc cch sau:

Trn trnh n: File New project.

Thanh cng c: Bn phm: Ctrl+N.

Cc m un tnh ton hin ra. Nhn chn RC elements Design tnh ton thit k cu kin b tng ct thp.

2. Mn hnh hin ra cc cng thc hin cng vic tng ng vi s chn.

3. Ti y chng ta c th thit k b tr thp cho cc cu kin sau:

Dm. Ct. Mng. Mng lin tc. Tng.

Chng ta ln lt nghin cu theo cc mc di y.



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1 THIT TIU CHUN L thuyt thit lp tiu chun gm n v o v vt liu c gi thiu tng th ti

phn Gii thiu tng qut, ti y ti ch gii thiu cch chn vt liu cho cc cu kin ang nghin cu. Nu chng ta thit k Dm, Ct, Mng, Tng v.v trong cng mt d n th vic thit lp v chn vt liu ny chung cho tt c cc cu kin ni trn.

1.1 Thit lp n v 1. Ra lnh: bng mt trong cc cch sau:

Trnh n: Tools Job Preferences hoc Tools Units and Formats. Thanh cng c: .

2. Hp thoi hin ra thc hin cng vic.

3. Ti dng u tin, t tn tiu chun mi l BTCT-VN.

4. Nhn chut vo mc Units and Formats, ni dung hp thoi tr thnh nh hnh di.



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5. Zero format: chnh xc (s ch s tp phn). Xa s c v g s mi nu cn. 6. Default units: cc n v mc nh. Vit Nam, chng ta chn Metric.

7. Hp thoi tip theo hin ra khng nh. Nhn Yes, ton b cc n v chuyn v h

mt.

8. Nhn vo du + ti Units and Formats, cc thng s o lng hin ra. Nhn vo tn

mc thy cc loi thng s hin ra vi cc n v h mt. C th nguyn hoc thay i. V d i lng lc tc dng c cc n v nh hnh di.

1.2 Thit lp c s d liu Databases chn vt liu ph hp vi tiu chun Vit Nam, chng ta phi thit lp c s d liu

ph hp. Hin nay chng ta ang dng cc tiu chun da theo tiu chun Nga nn chng ta a tp c s d liu vo nh trnh by di y.

1. Ti hp thoi Job Preferences nhn mc Databases, hp thoi c cc thng s mc nh nh hnh di.



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2. Nhn vo du + trin khai cc thng s.

3. Nhn Steel and timber section: tit din thp v g, tiu chun p dng cho thng

s ny nh hnh di.

Nhn nt m tp d liu. Nhn mi tn, chn GOSTL nh hnh di. Nhn OK.



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Tit din thp tiu chun Nga c a vo.

4. Nhn Reinforcing bars: thanh ct thp.

Nhn nt thm d liu. Hp toi hin ra, nhn chn SNIP 2, nhn Add.

Tr li hp thoi trc, nhn chn SNIP 2, nhn nt p dng tiu chun.



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1.3 Thit lp m hiu thit k Design codes 1. Ti hp thoi Job Preferences nhn mc Design codes, hp thoi c cc thng s

mc nh nh hnh di.

2. Mun c tiu chun thp Nga c cc thanh thm cc m hiu khc, nhn nt More

codes, hp thoi hin ra chn.



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3. Nhn nt ti di ch Codes chn loi vt liu v loi ti trng.

4. Nhn chn Steel/aluminum thp/nhm. Nhn chn SNiP II 23-81, nhn mi tn

chuyn vo d n (chuyn sang bn phi). 5. Nhn nt Set as Current ly lm tiu chun hin hnh.

6. Nhn RC: b tng ct thp . Nhn chn SNiP 2.03.01-84, nhn mi tn chuyn vo

d n (chuyn sang bn phi). 7. Nhn nt Set as Current ly lm tiu chun hin hnh.

8. Nhn OK tr li hp thoi trc. Nhn mi tn ti cc tng ng chn m tiu chun nh hnh di.

Steel/aluminum structures: kt cu thp/nhm, chn SNiP II 23-81. Steel connection: thp ni gc.



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RC structures: kt cu b tng ct thp, chn SNiP 2.03.01-84. Timer structures : kt cu g. Geotecnical: a k thut.

1.4 Chn vt liu cho tiu chun 1. Ti hp thoi Job Preferences nhn mc Material, cc thng s hin ra.

2. Ti thng s Materrials, mc nh vt liu ly theo American, c th nhn chn nc hoc tiu chun khc. Mi nc c cc qui c mc thp, mc b tng ring. i vi Vit Nam hin nay v dng thp v mc b tng theo tiu chun Nga, nn c th chn Russian.



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3. Steel: thp. Nhn chn mc thp.

4. Concrete: b tng. Nhn chn mc b tng.



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1.5 Kt thc to tiu chun 1. Sau khi to xong cc thit lp cn thit, nhn OK, kt thc lnh. 2. Cc tiu chun ny c tn ti, c th s dng cho cc d n khc. 3. Khi to d n mi, ra lnh Job Preferences. 4. Nhn chn tiu chun cn dng.

5. Nhn OK, kt thc lnh.

2 THIT K CT THP DM

2.1 Khi ng lnh 1. Ra lnh bng mt trong cc cch sau:

Trnh n: RC elements New Beam.

Thanh cng c: RC elements Beam 2. Cc cng c hin ra thc hin cng vic nh hnh di.



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Nhn nt vung ti gc trn bn tri thu nh cc hp thoi (hnh di bn tri).

3. Nhn, gi v r chut di chuyn cc hp thoi c th nhn thy hnh dng thanh dm

trn mn hnh. Nhn vo th Beam View hin ra hnh thanh dm nh hnh di.



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Ti khung nhn Beam View, c th xoay nhn 3D.

2.2 Chn thng s tng Story parameters 1. Ra lnh bng mt trong cc cch sau:

Trnh n: Analysis Story Parameters.

Thanh cng c: Beam Parameters Story Parameters (thng nm dc bn phi mn hnh).



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2. Hp thoi hin ra.

3. Nhn nh du ti Reference level: v cho cao ti nhp liu bn cnh. 4. Exposure: phn h. Nhn chn:

Internal: bn trong. External: bn ngoi. Ground-variable wate level: nn t c kh nng ngp nc.

5. Nhn OK, kt thc lnh.

2.3 CHN HNH DNG V CHO KCH THC THANH DM

2.3.1 Cho kch thc theo chiu di dm Hp thoi ny c kch hot ngay sau khi ra lnh to dm. Nu khng kch hot, thc

hin nh di y. 1. Ra lnh bng mt trong cc cch sau:

Trnh n: RC elements Dimensions.

Thanh cng c: Beam Parameters Dimension (thng nm dc bn phi mn hnh).



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2. Hp thoi cho kch thc chiu di Dimension Definition.

Nu dm c t hai khu tr ln, cc thng cho tip theo sau y thuc v khu

hin hnh (trn hnh c mu ).

3. Nhn nt hoc chuyn thit lp sang khu khc. 4. Nhm Beam Geometry: hnh dng dm, gm cc thng s sau:

Total beam length: tng chiu di dm. Gi tr ny ph thuc vo chiu di mi khu v s khu .

Total number of spans length: tng s khu . Number of identical beams: s thanh dm ging nhau. Simplified names: c nh du, tn c n gin ha. Automatic numbering of: t ng nh s cho cc i tng c nh du chn

di y:

o Spans: khu . o Supports: gi .

Cantilever: phn hng. Nhn nh du vo phn hng (nu cn).

o Left: bn tri.



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o Right: bn phi. Add span: thm khu . Mi ln nhn nt, thm s khu cho ti bn

cnh. V d trong l 2, mi ln nhn nt ny, 2 khu c thm vo.

Copy span: copi khu . Tng t nh Add span, nhng khu thm vo c

hnh dng v kch thc ging khu hin hnh. Delete span: xa khu . Gi tr ti bn cnh cng tng t nh trn. Change Orientation: o chiu. Sau khi chn xong, nhn Apply.

5. Nhm Span Geometry: kch thc khu , gm cc thng s sau:

Name: tn khu hoc tn gi (support).

o Nu ti hp thoi Beam Geometry c nh du cho tn t ng th ti y cc tham bin ny m i (nh hnh trn).

o Nu ti hp thoi Beam Geometry khng nh du cho tn t ng th ti y c th g tn khc.

Length: di mt khu . G s. Left Support: gi tri. Right: gi phi. Cc gi c thng s:

o Width: b rng. G s. o Type: kiu, nhn chn mt trong cc kiu: Fixed: gn cng, Pinned: ngm

khp, Roller: con ln. o Concrete: b tng. o Masonry: tng xy.



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Nhn nt Advanced, hp thoi hin ra chon phng n mc neo vi gi (hnh di bn phi).

Sau khi chn xong, nhn Apply.

6. Nhm Segment: chn hnh dng v nghing ca on dm, gm cc thng s sau:

Predefined beam type: chn hnh dng on dm. Nhn mi tn chn nh hnh di.

Cho cao trnh v khong chnh ca hai u dm ti cc nhp liu nh trong hnh

ty theo hnh dng ca on dm c chn.



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Sau khi chn xong, nhn Apply.

Nhn nt hoc chuyn thit lp sang khu khc.

7. Nhn Close, kt thc lnh.

2.3.2 Chn hnh dng v cho kch thc tit din Hp thoi ny c kch hot ngay sau khi ra lnh to dm. Nu khng kch hot, thc

hin nh di y. 1. Ra lnh bng mt trong cc cch sau:

Trnh n: RC elements Cross-section Type.



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Thanh cng c: Beam Parameters Section Definition (thng nm dc bn phi mn hnh).

2. Vic chn hnh dng v kch thc tit din c p dng cho on dm ang c

kch hot (trn hnh c mu ) nu khu c nhiu on hoc ca mt khu nu khu c mt on.

3. Label: nhn ca dm. Nhn ny t ng cp nht theo kch thc. C th g tn khc. 4. Start: ta im u ca dm. 5. End: ta im cui ca thanh dm. Hiu hai gi tr ny l chiu di thanh dm. 6. Chn tit din hnh ch nht:

Nhn nt . Cho kch thc b, h nh trn hnh v.



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7. Tit din hnh ch T:

Nhn chn hnh dng v cho kch thc nh trn hnh v.

8. Tit din hnh phc tp:

Nhn chn hnh dng v cho kch thc tng th nh trn hnh v.

Nhn mc Slabs, cho kch thc sn. Nhn chn Slabs, hnh dng v kch thc

nh hnh di bn tri. Nhn chn Hollow slabs (sn rng), hnh dng v kch thc nh hnh di bn phi.



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Nhn mc Cuts cho kch thc phn ct b. Chn mt trong cc phng n nh

cc hp thoi di y v cho kch thc.

o Without cuts: khng ct.

o Right: ct bn phi:

o Left: ct bn tri:



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9. Nhn Apply, chp nhn thit lp.

10. Nu dm nhiu on hoc nhiu khu , nhn nt hoc chuyn thit lp sang khu khc.

11. Nhn Close, ng hp thoi.

2.3.3 To hc khot rng trn thn on dm 1. Ra lnh bng mt trong cc cch sau:

Trnh n: RC elements Openings.

Thanh cng c: Beam Parameters Opening 2. Hp thoi hin ra. Chn hnh dng v cho kch thc.

3. Name: tn hc. Mi tn hc ng vi s liu kch thc cho ti cc nhp liu. 4. X Local (m): ta X (dc theo chiu di dm nm ngang) ca hc so vi gc ta

tng i tnh bng mt. G s.



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5. Z Local (m): ta Z (dc theo chiu cao ca dm hng ln trn) ca hc so vi gc ta tng i tnh bng mt. G s.

6. Start: im gc ta . Nhn chn:

left lower: im gc thp bn tri ca u dm. left upper: im gc trn bn tri ca u dm. right lower: im gc thp bn phi ca u dm. right upper: im gc trn bn phi ca u dm. center: tim dm.

7. Span number: s hiu ca khu dm . Nu dm c nhiu khu , g s hoc nhn vo khu trn khung nhn b tr hc (on dm c mu ).

8. Consider during in calculatios: c nh du, hc khot c xt n trong tnh ton.

Khng nh du, khng c tnh n. 9. Change stirrup spacing near the opening: c nh du, cc ct ai gn hc thn g

c iu chnh. 10. Type: kiu hc. Nhn chn kiu v cho kch thc theo tng kiu.

Rectangular: hnh ch nht. Cho kch thc cc cnh Lx: chiu ngang, Lz: chiu ng ca hnh ch nht.

Round: hnh trn. Cho ng knh D. Adjoining beam: cnh dm. Cng cho kch thc Lx, Lz. Cc kch thc ny o

bng mt.

11. Sau khi t tn, cho kch thc, v tr ca hc, nhn Add thm hc. 12. C th to nhiu hc vi kch thc v v tr khc nhau.



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13. Khi thay i cc gi tr, nhn Modify, nhn gi tr mi.

14. Nhn Delete xa hc.

15. Nu c nhiu hc, nhn nt hoc chuyn n d liu ca cc hc.


2.3.4 To hc khot rng trn thn on dm bng bng d liu 1. Ra lnh trn trnh n: RC elements Opening table.

2. Bng thng s xut hin. Cho cc thng s, hc c to ra.

3. Ti y c th thay i thng s ca hc c hoc thm hc mi. 4. Hc c cp nht ti khung nhn hnh m t Beam view.



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2.4 CHN PHNG N B TR CT THP Ti y chng ta chn cc phng n hnh dng, ng knh cc thanh ct thp v.v. Cc phng n ny c la chn mc nh theo m thit k (Design codes) m

chng ta chn trn. Nu khng cn thit th khng cn thay i.

2.4.1 Ra lnh 1. Ra lnh bng mt trong cc cch sau:

Trnh n: Analysis Reinforcement Pattern.

Nhn nt ti thanh cng c Beam Parameters (thng nm dc bn phi mn hnh).


Sau y ti trnh by cho tng chuyn mc.



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2.4.2 Thit lp chung General 1. Nhn mc General trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.

3. Cc thng s ny mc nh vi tn l Standard. Nhn - Save as, t tn khc.

Hp thoi hin ra. Ti ny c th g theo yu cu thit k. V d g Beam 1, nhn OK.

Tn thit lp c a ln, bt u thay i thng s.



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4. Nhn Delete, xa thit lp hin thi. 5. Nhm Reinforcement segment: khu b tr thp nhn mt trong hai la chn:

Single span: mt khu . Whole beam: sut chiu di dm.

6. Nhm Main Reinforcement: thp chnh gm:

Min diameter: ng knh nh nht. Nhn nt, danh sch hin ra, chn gi tr.

Thng chn l 10. Preferred bar spacing: khong cch u tin ca cc thanh gm:

o Emin: nh nht. o Emax: ln nht. y l hai phng n khng ch. C th nhn chn mt

trong hai, c hai hoc khng chn. Nu chn, cho gi tr ti bn cnh.

For longitudinal reinforcement for torsion: khong cch cho thanh dc chu xon. G s.

Tied all: gia c, chn mt trong hai phng n:

o Auto: t ng. o Yes: c gia c.

Group layers: c nh du: nhm cc lp thp li. 7. Nhm Straight bars: thanh thng gm:



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Maximum Length: chiu di ln nht. G s. Minimum diameter: ng knh nh nht. G s. Module Length: m un chiu di. G s.

8. Nhm Bent bars: thanh un cong gm:

Bent bottom bars: c nh du: un cong thanh bn di. Bent top bars: c nh du: un cong thanh bn trn. Number per plane: s thanh b un cho mi mt. Xem hnh minh ha bn di.

Bend angle: gc un (xem hnh bn di). Anchor length: di mc neo (xem hnh bn di). Bend spacing: c nh du: cho khong cch gia cc ch un. Xem hnh

minh ha bn di.

o intermediate: ti cc on gia gia. G s. o from support: tnh t gi . G s.

9. Cc la chn khc: mun chn phng n no, nhn nh du vo phng n .



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Symmetrical reinforcement: b tr thp i xng. Consider slab parts of T-section in quantity survey: c nh du: c tnh

n phn cnh ca tit din dm ch T trong i lng o c. Nu khng nh du, th tch ca dm ch tnh phn tit din hnh ch nht.

Consider hook length in anchorage length: c nh du: c tnh n di mc trong di neo , xem hnh bn di . Ti hnh ny i lng la l di neo c tnh c di mc (hnh bn tri), khng nh du (hnh bn phi).

Ignore verification of reinforcement shape during beam verification: c

nh du: b qua kim tra hnh dng thanh thp khi kim tra dm.

2.4.3 B tr ct thp lp y dm - Bottom Reinf 1. Nhn mc Bottom Reinf. trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.



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3. Hnh trn cng l minh ha kch thc v cc thng s thanh thp. 4. Xc nh s lp thp:

Nhn nt . Cc thng s tng ng hin ra ti bn phi Number of layers N.

Nhn chn mt trong 2 phng n:

o Auto t ng theo kt qu tnh ton. o Table parameters: thng s cho theo bng. Cc bng hin ra.Cc nhp liu

trong cc bng c ngha nh sau:

Ti bng 1: S dng ph thuc vo gi tr Nmax. Trong ct th 2 For H 5m, ti a l 3 lp thp).

Hai la chn ph:



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o Not fully allowed: khng hon ton cho php. Nu chn phng n ny, lp trn ca y dm s khng hon thin.

o Exchange 1st and 2nd: cho php tro i phng n 1 v 2 tc l t ng v bng.

5. Xc nh ng knh thanh thp:

Nhn nt . Cc thng s tng ng hin ra ti bn phi Diameter.

Tng t nh s lp thp, ti d max v d min, nhn chn gi tr hoc chn Auto. Ti ct H v L, cho gi tr cn thit. Diameter 1: ng knh lp thp nh trn hnh v. Diameter 2: nu c nh du, bn phi kch hot chn kch thc.

6. Xc nh s thanh thp b tr trong mt lp theo b dy dm:

Nhn nt , cc thng s tng ng hin ra ti bn phi Reinforcement column number.



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Nhn chn mt trong 2 phng n tng t nh lp thp:

o Auto t ng theo kt qu tnh ton. o Table parameters: thng s cho theo bng.

N min: s thanh ti thiu. N max: s thanh ti a. Nhn mi tn chn gi tr.

7. Anchor loops at beam ends: mc neo u dm. C nh du, c nc neo vng ti cc

u dm.



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8. Nhn nt Anchorages: neo, hp thoi hin ra chn phng n cho neo.

Extreme support (left): u mt pha gi tri. Extreme support (right): u mt pha gi phi. Intermediate support (left): u mt bn tri gi gia . Intermediate support (right): u mt bn phi gi gia.

Ti cc u mt ny, nhn mi tn chn cc phng n. Cc phng n c minh ha bng cc hnh bn di.

i lng c nh trn hnh minh ha. G s. Nhn OK, cp nht v kt thc hp thoi.



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2.4.4 B tr ct thp lp mt trn ca dm - Top Reinf 1. Nhn mc Top Reinf. trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.

3. Xc nh s lp thp: Nhn nt .

Cc thng s v cch lm ging nh lp y (Bottom).



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Nu nhn nh du As bottom reinforcement: chp nhn cc thng s v b

tr ging nh lp y, cc thng s m i.

4. Xc nh ng knh thanh thp:

Nhn nt . Cc thng s tng ng hin ra ti bn phi Diameter d. Cch thc hin ging nh lp y (bottom).



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Nu nhn nh du As bottom reinforcement: chp nhn cc thng s v b

tr ging nh lp y, cc thng s m i.

5. B tr thp cho dm ch T: nhn chn mt trong hai phng n:

On the whole flange length: t sut chiu di bn cnh dm. Only on the web width: ch t bng b rng phn bng dm.

2.4.5 B tr ct thp ngang 1. Nhn mc Transversal Reinf. trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.



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3. Nhm nhn mt ng Elevation gm cc thng s:

Arrangement type: kiu b tr ct thp. Nhn chn mt trong hai phng n:

o Fit to envelope: kht vi ng (xem hnh). o Constant seg. Spacing: khong cch gia cc thanh chia u on dm.

Cho gi tr ti nhp liu bn phi . Gi tr mc nh = 0.2*l (l chiu di on dm), c th cho gi tr khc.

Position of extreme atirrups: v tr ct ai u cng. Nhn chn mt trong 2 phng n:

o Auto: t ng theo kt qu tnh ton. o e



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o List: cho cc khong cch bng s c th thnh mt danh sch cch nhau bng du cch ti nhp liu bn phi.

: Support reinforcement: ct thp gi . Nhn nt ny, hp thoi hin ra, chn cc phng n:

o b>= : c nh du, iu kin l b rng dm >= gi tr ghi trong bn phi.

Concrete supports gi b tng ct thp, Masonry supports gi l tng xy.

o Spacing: khong cch. Chn mt trong 2 phng n: Same as support reinforc.: ging nh ct thp gi . Cho gi tr ti nhp liu.

o Number: s thanh. Chn mt trong 2 phng n: Auto.: t ng theo kt qu tnh ton. Cho gi tr ti nhp liu.

o Nhn OK, kt thc hp thoi.

Suspended load: ti trng treo. Nhn nt ny, hp thoi hin ra, chn cc phng n:

o Reinforcement method: phng n b tr ct thp. Chn mt trong 2 phng n:

ti ch c ti trong treo, b tr ct ai dy hn



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b tr thanh dc. Khi nhm Bent bars c kch hot.

o Bent bars: thanh b un gm cc thng s:

Diameter: ng knh. Nhn chn gi tr hoc Auto (mc nh) ly theo kt qu tnh ton.

Number: c nh du, c cho s thanh: ch phng n g s hoc as for main bars ging nh cc thanh chnh.

o Nhn OK, kt thc hp thoi.

4. Nhm hnh ct Section gm cc thng s:

Section: mt ct. Nhn chn cc phng n:

o Auto: t ng theo kt qu tnh ton.



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o : ngi dng t xc nh. Khi nhn nt ny, nu ti mc Bottom Reinf. C cc gi tr Nmax v Nmin khc nhau s c thng bo Tr li mc Bottom Reinf. V cho cc gi tr Nmax=Nmin nh hnh di.

Nhn OK, tr li cho cc gi tr nh hng dn.

Sau khi cho cc thng s ca cc thanh dc mt trn v mt di y

, tr li hp thoi ny, nhn , hp thoi hin ra b tr thp.

Nhn vo cc du chm (thanh dc), cc ng ct ai c vch ra. Nhn Apply, kt thc mt chu trnh. Nu c nhiu thanh dc, c th to

nhiu phng n khc nhau. Cc phng n c lu vo Bar list, c th nhn chn a ln.



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Nhn Delete, xa phng n hin thi. Nhn Delete all, xa tt c cc phng n. Nhn OK, kt thc hp thoi.

Open stirrups: ct ai h. Nhn chn cc phng n (c th chn c hai): o For T-section: dng cho dm ch T (hnh di bn tri). o For rectangular section: dng cho dm ch nht (hnh di bn phi).

Cho gi tr l nh trn hnh.

Cc hnh di chn cch b tr v cho ng knh thanh thp.

o Nhn chn v hnh v.



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2.4.6 Ct thp cu to Constr. Reinforcement 1. Nhn mc Constr. Reinf. trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.

3. Consider in load capacity calculations: c nh du c tnh n trong tnh ton

ti trng. 4. Diameter: ng knh thanh thp. Nhn chn mt trong 2 phng n:

d: nhn chn ng knh. As for main bars: ging nh thanh chnh.



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5. Ko di thanh thp.

Bar prolongation:

o c nh du cho php ko di thanh thp theo iu kin: For l



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Diameter >=: nhn chn ng knh. Tied: buc. C nh du, c buc. Conditions of application: iu kin p dng. Cho gi tr ti cc nhp liu nh

trn hnh.

8. Transpor reinforcement: Thp lm mc vn chuyn . Nhn chn mt trong hai hnh bn di (mc c hnh mu ).

9. Main reinforcement protection: Thp chng chnh. Hnh m t bn di (thanh

c hnh mu ).

Bursting reinforcement: c nh du, c lm choi ra.

10. kiu thp. Hp thoi chn kiu thp.



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Cc loi ct thp nh sau:

o Constructional logitudinal: ct thp cu to dc. o Assembly hooks: mc. o Anti-shringkage: ct chng co ngt. o Bursting hooks: mc te. o Reinforcement struts: ct chng.

Nhn chn. C cc la chn:

o As for longitudinal reinforcement: ging nh ct thp dc. o As for special reinforcement: ging nh ct thp c bit. o As for transversal reinforcement: ging nh ct thp ngang.

Nhn OK, kt thc mc ny.

11. ct thp ni. Hp thoi chn thng s:

Nhn chn mt trong cc hnh chn hnh dng thanh thp. Cho cc gi tr nh trn hnh v. d1: ng knh thanh thp.

Steel type as for: kiu thanh thp. Nhn chn. C cc la chn:

o As for longitudinal reinforcement: ging nh ct thp dc. o As for special reinforcement: ging nh ct thp c bit. o As for transversal reinforcement: ging nh ct thp ngang.

Nhn OK, kt thc mc ny.

2.4.7 Chn hnh dng ct thp Shapes 1. Nhn mc Shapes trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.



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3. Nhn vo tn ct thp bn trn, cc thng s tng ng hin ra bn di thay i.

Nhng t ting Anh v cc thng s lm quen ti cc phn trc, y ti khng nhc li.

4. Nhn OK, kt thc thit lp, cng l kt thc phn ny.

2.5 CHN PHNG N TNH TON CT THP Ti y chng ta chn vt liu b tng v ct thp lm iu kin ban u cho tnh ton.

Cc png n ny c la chn mc nh theo m thit k (Design codes) m chng ta chn trn. Nu khng cn thit th khng cn thay i.

2.5.1 Ra lnh 1. Ra lnh bng mt trong cc cch sau:

Trnh n: Analysis Calculation Options.



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Nhn nt ti thanh cng c Beam Parameters (thng nm dc bn phi mn hnh).

Nhn mt trong cc nt di y mn hnh:


Sau y ti trnh by cho tng chuyn mc.

2.5.2 Thit lp chung General 1. Nhn mc General trn nh hp thoi. 2. Cc thng s hin ra nh hnh di.



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3. Cc thng s ny mc nh vi tn l Standard. Nhn - Save as, t tn khc.

Hp thoi hin ra. Ti ny c th g theo yu cu thit k. V d g Beam 1, nhn OK. Tn thit lp c a ln, bt u thay i thng s.

4. Nhn Delete, xa thit lp hin thi. 5. Nhm Cover to (cm): lp b tng bo v. Chn mt trong cc thanh cn c lp bo

v:

Transversal reinforcement: thanh ct thp ngang. Longitudinal reinforcement: thanh ct thp dc.



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Longitudinal reinf. axis: thanh ct thp trc dc. bottom: mt di. side: mt bn. Top: mt trn. Cc gi tr mc nh l 3cm, c th g s khc. Fixed, c nh du: c nh, khng thay i trong qu trnh tnh ton.

6. Correction of cracking by increasing the reinforcement area: c nh du: chnh sa vt nt theo s gia tng ca din tch ct thp. iu ny ng dng cho tt c cc m hiu (codes) tr ACI, BAEL v CSA.

7. Nhm Deflection calculation: tnh ton vng. Chn cc phng n (mc nh l khng chn phng n no):

Correction by Reinforcement chnge: chnh theo s thay i ca ct thp. Deflection: c nh du, cho gi tr vng vo nhp liu bn cnh.

8. Precast beam: c nh du, dm c sn. Cho gi tr ti Support depth: chiu su gi .

9. Minimum capacity load: trng ti ti thiu. Mc nh l 1. G s.

10. ti u ha kch thc. Nhn nt ny, hp thoi hin ra chn mc tiu ti u.



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Mc nh y l kch thc tit din dm h v b l khng i ( fixed) nh trn hnh, khng c la chn ti u.

Dimension change every: kch thc thay i vi mi 5cm. C th cho gi tr khc.

Nu xa du ti h fixed:

o h max: c nh du, cho gi tr h max ti bn cnh.

Nu xa du ti b fixed:

o b max, b min: c nh du, cho gi tr ti bn cnh.

Nu xa c hai:

o Cho t s b/h v cc gi tr b min, b max, h max nh trn.

Mc tiu ti u Optimization criterion trong tt c cc trng hp ni trn l mt trong hai la chn:

o Reinforcement ratio: t l ct thp. G s. o Steel weight: trng lng thp. G s.

Hai la chn mc nh: c th chn hoc khng.



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o identical height of spans section: c nh du, chiu cao ca cc tit

din dm ti tt c cc khu bng nhau. o identical width of spans section: c nh du, b rng ca cc tit din

dm ti tt c cc khu bng nhau.

11. thit lp phng n nng cao (nu thy khng cn thit, khng chn). Nhn nt ny, hp thoi hin ra.

Support moment redistribution: s phn bi li m men ti gi .

o Reduction of support moment by: gim bt m ment gi (mc nh l khng nh du): c nh du, cho cc gi tr ti for ULS: v for SLS:. Gi tr ny tnh bng phn trm ca m men thc. Ti y c th hiu nh sau:

- Nu chng ta cho phn b li m men ti gi gim i 20% so vi gi tr thc t th kt qu m men s gia tng ti khu lin k.

o Avoid compressiver reinforcement at support: trnh ct chu nn ti gi

(mc nh l khng nh du). Phng n ny ph thuc vo s c mt ca ct chu nn ti gi . Nu phng n ny c la chn, v trong khi



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chng trnh thc hin n, iu kin ct chu nn ti gi l cn thit, m men phn b li ti y b trit tiu.

Calculation span length for concrete support: tnh ton di khu cho gi b tng. Nhn chn:

o In the axis: trn trc. Mc inh l khng chn. Moment on extreme support (pinned): m men ti gi ngoi cng (ngm).

G s. Gi tr ny l h s ca m men cc i. Number of calculation points in the span : s im tnh ton trn mt khu .

G s. Mc nh l 11. Cc im ny s c hin th trong bng kt qu. Automatic generation of selt-weight: c nh du, t ng khi to trng

lng bn thn dm trong tnh ton. Axis force taken into acount: c nh du, lc dc trc c a vo tnh

ton. Display diagrames for all combinations: c nh du, cho hin th biu

ca tt c cc t hp. Verification only for positive deflections: c nh du, ch kim tra nhng

bin dng dng. Redistribution of a shear force near support: c nh du, phn b li lc

ct gn gi .

Cc m thit k - codes ca Php, M, Ba lan, Nga v Ty ban nha c phng n cho php gim lc ct ti gi .

Nhn OK, kt thc hp thoi.

2.5.3 Chn b tng Concrete 1. Nhn mc Concrete trn nh hp thoi hoc nhn nt di y mn

hnh. 2. Cc thng s hin ra nh hnh di.



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3. Material: vt liu. Ti y hin th tn nc c m hiu chn Design codes m hiu thit k. Phn trc chng ta chn l SNiP 2.03.01 84 v vt t chn Russian, ph hp vi tiu chun Vit Nam.

4. Name: tn b tng. Nhn nt , chn tn b tng. Trc khi chn, nn dng bng tra sang mc b tng Vit Nam tng ng.

Mt s nc, cc mc b tng c hin th km theo cng c trng n v

Mpa.

i vi tiu chun Nga, khng hin th cng c trng trn hp thoi. Sau khi

nhn OK, cng xut hin ti bng thng s Structure elements bn tri mn hnh.



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Da vo bng qui i theo tiu chun Vit Nam, c th suy ra mc b tng cn dng.

TCXD 356-2005: MPa ------------> Mc

4,50 -------------- 50 6,42 --------------- 75 9,63 -------------- 100 12,84 ------------- 150 16,05 --------------150 19,27 --------------200 25,69 --------------250 28,90 --------------300 32,11 --------------350

5. Unit weight: trng lng ring.

i vi b tng tiu chun Nga l 2501 KG/m3. Mi nc c tiu chun ring nh hnh di y ca o.

6. Aggregate size: kch thc cp phi. Mc nh l 20mm.

7. Type: kiu b tng. Nhn nt , chn:

heavyweight: b tng nng (loi b tng t trng cao s d lm vt chn bc x). fine-grained A: ht mn nhm A. fine-grained B: ht mn nhm B. fine-grained C: ht mn nhm C. lightweight-synthetic compact filler: b tng nh tng hp, c n m cht. lightweight-synthetic coarse-grained filler: b tng nh ht th, c n. lightweight-natural filler: b tng nh n t nhin. porous: b tng xp. cellular: b tng dng t ong.



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8. Curing method: phng php bo dng b tng. Nhn nt , chn:

normal: bnh thng. thermal treatment: x l nhit. autoclaves: chng p.

9. High humidity/hydration: c nh du: mi trng m cao hoc di nc. 10. Concreting in layers h>1.5(m): c nh du: b tng ti lp > 1.5 mt.

2.5.4 Chn thanh ct thp dc Longitudinal reinforcement 1. Nhn mc Longitudinal reinf. trn nh hp thoi hoc nhn nt di y mn hnh:

2. Cc thng s hin ra nh hnh di



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3. Steel: Thp. Ti y hin th tn Design codes m hiu thit k chn ti phn trc l SNiP 2.03.01 84, ph hp vi tiu chun Vit Nam.

4. Grade: nhm thp. Nhn nt , chn loi cn dng. Mi nhm thp c:

bn cnh l hnh dng: Plain: thp trn, Deformed: thp hnh. Characteristic strength: cng c trng. Cc kch thc ng knh v din tch tit din c cho ti bng bn di. Nu

nh du kch thc no, kch thc c a vo la chn cho ct thp v ngc li.

2.5.5 Chn thanh ct thp ngang (ct ai) Transversal reinforcement

1. Nhn mc tranversal reinf. trn nh hp thoi hoc nhn nt di y mn hnh.

2. Cc thng s hin ra nh hnh di. 3. Cc thng s ging nh ct thp dc.

2.5.6 Chn thanh ct thp tng cng Additional reinforcement

1. Nhn mc Additional reinforcement trn nh hp thoi. 2. Cc thng s hin ra nh hnh di. 3. Cc thng s ging nh ct thp dc hoc ngang.



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2.6 T TI LOADS

2.6.1 Ra lnh t ti 1. Ra lnh bng mt trong cc cch sau:

Trn trnh n: RC element Loads.

Thanh cng c: nhn nt Load definition ti thanh cng c Beam Parameters (thng nm dc bn phi mn hnh).

Nhn mc Beam Load Pattern trn vng mn hnh v biu .



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2. Hp thoi hin ra b tr ti.

3. Nhn nt - trng lng bn thn (self-weight) ca thanh dm. Ti trng ny thuc tnh ti, khng phi cho gi tr m cn c vo vt liu, kch thc dm, phn mm t tnh.

Sau y l cc loi ti theo chuyn mc.

2.6.2 Ti phn b - Distributed load 1. Nhn chn Distributed ti Load category.

2. Nature: tnh cht ca ti. Nhn chn:



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dead+live: tnh ti+hot ti. dead: tnh ti. live: hot ti. accidental: ti do s c.

3. Case number: s hiu ti. S hiu ny c t ng hin ra khi chn ti trn. 4. Spans: khu dm. Nu dm c t 2 khu tr ln, gi tr cho trong ny l ch khu

ang c t ti.

5. Cc thng s chung cho tt c cc phng n t ti:

Long-term: c nh du - ti ln tc. Suspended: c nh du - ti treo. Load factor: h s.

6. Cc phng n tng cng cho cc thanh dm nghing, khng p dng cho dm thng:

Direction: chn phng ca lc. Nhn chn trc ta X (dc trc dm) hoc Z (vung gc vi mt trn ca dm). Mc nh l Z.

Coordinate system: h trc ta . Nhn chn:

o Local: h trc a phng, gc ta ngay trn u dm. Thng chn h ny.

o Global: h trc tng th, y l h trc ca ton bn v. Projection: hnh chiu ca ti. Nhn chn:

o Projection: c hnh chiu. o Not Projection: khng khai trin hnh chiu.

7. Chn phng n phn b ti: nhn mt trong cc nt v cho gi tr tng ng nh trn hnh v.



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ti trng phn b u sut chiu di trc. o i vi ti trng tnh (dead load), ng ( live load) hoc do s c

(accidental), cho gi tr ti P1.

o i vi ti trng tnh + ng (dead + live), cho gi tr P1 ca G (ni lc) v

Q (lc ct). Gi tr Ql-t/Q: mc nh = 1.

ti trng u, phn b khng sut chiu di trc. o Cc loi ti v cc gi tr cho nh phn trn. o V tr lot ti c xc nh bng gi tr X1, X2 nh hnh di.

o Gi tr X1, X2 cn ph thuc vo cc la chn sau:

Dimension chain: chui kch thc lin tc. Khng nh du, cc kch thc ny nh hnh di.



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Dimension chain: c nh du, cc kch thc ny nh hnh di.

Relative dimenssion: theo kch thc dm. Khng nh du, cc

kch thc ny c xc nh bng mt (m).

Relative dimenssion: c nh du, cc kch thc ny nh tnh theo

s phn ca tng chiu di dm. V d X2=1 (bng chiu di dm), X1=0.3 (bng 0,3 ln chiu di dm).

ti trng khng u.

o V tr, gi tr cc lc tc dng c xc nh bng cc nhp liu nh hnh di.

o Cc phng n cho gi tr X1, X2 gii thch ti phn trn.



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ba v tr t ti.

o V tr, gi tr cc lc tc dng c xc nh bng cc nhp liu nh hnh di.

ti trng on gia u, hai bn khng u. V tr, gi tr cc lc tc dng c xc nh bng cc nhp liu nh hnh di.

ti trng tam gic. V tr, gi tr cc lc tc dng c xc nh bng cc nhp liu nh hnh di.

ti trng hnh thang. V tr, gi tr cc lc tc dng c xc nh bng cc nhp liu nh hnh di.



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ti trng xon. V tr, gi tr cc lc tc dng c xc nh bng cc nhp liu nh hnh di.

8. Sau khi chn ti trng, hnh thc phn b, cho cc gi tr, nhn Add gn ti cho m hnh.

9. Khi thay i cc gi tr, nhn Modify, nhn gi tr mi.

10. Nhn Delete ti hin thi.

11. Nu c nhiu ti, nhn nt hoc chuyn n d liu ca cc ti.


2.6.3 Ti tp trung - Concentrated load 1. Nhn chn Concentrated ti Load category. 2. Nature: tnh cht ca ti. Nhn chn ging nh ti trng phn b.



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3. Cc thng s khc ging nh gi thch ti ti trng phn b.

4. Nhn nt cho lc tc dng F nh hnh trn.

5. cho m men un nh hnh di.

6. cho m men xon nh hnh di.

7. Cc nt khc ging nh ti trng phn b.

2.6.4 Ti trng phng - Planar load Ti trng phng l ti trng tc dng ln mt ni gia hai thanh dm, v d nh ti tc

dng ln sn gi vo hai thanh dm. 1. Nhn chn Surface ti Load category. 2. Nature: tnh cht ca ti. Nhn chn ging nh ti trng phn b.



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3. Nhn nt din tch phn b lc hnh ch nht. Cho gi tr Y v ti trng P nh hnh trn.

4. din tch chu ti hnh tam gic. Cho ti trng v cc gc nh hnh di.

5. din tch chu ti hnh thang. Cho ti trng v cc kch thc nh hnh di.

6. Cc nt khc ging nh ti trng phn b.

2.6.5 t ti bng bng Loads Table 1. Ra lnh bng mt trong cc cch sau:

Bng ti trng xut hin ng thi vi hp thoi ti trng Loads khi nhn mc Beam - Load Pattern.



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Trn trnh n: RC element Loads table.

2. Bng hin ra. Mi thay i hp thoi Loads Pattern u c cp nht ti bng v

ngc li.

3. Trong bng c y cc ct tng ng cho tng loi ti. Nhn chn loi ti trn nh

bng. 4. Continuous: ti lin tc (phn b). Nhn chn kiu cht ti ti ct Distributed load.



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Self-weight: trng lng bn thn. Uniform: ti trng ng nht. Distributed: phn b u. Trapezoidal: phn b kiu hnh thang. Uniform moment: m men ng nht. Chn ti trng no th cc ct thng s tng ng ca ti trng c kch hot

nhp gi tr. ngha ca cc thng s c gii thiu ti phn trn.

5. Concentrated: ti trng tp trung. Nhn chn kiu cht ti ti ct Concentrated load.

Concentrated Force: lc tp trung. Moment: m men. Torsion moment: m men xon.

6. Xa ti trng:

Nhn phi chut vo dng ti trng, chn Delete hoc nhn nt Delete trn bn phm (xa d liu).

Chn Cut (Ctrl+X): xa ti trng.

7. Chuyn sang bng Excel:

Nhn phi chut vo v tr bt k trong bng, chn Cnversion to EXCEL (CSV) format.



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Hp thoi hin ra, g tn tp ti File name.

Nhn Save. Tp lu tr c phn m rng *.CSV. Khi m bng t Excel c dng:

2.6.6 Xem s t ti 1. Khi t ti, c th nhn chut, gi v ko bng v hp thoi t ti xung na di mn

hnh hin ra s t ti nh hnh di.

2. Cc nt di y s dng tng, gim ln cc hnh din t trn s (ti

khoanh hnh van).



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2.7 TNH TON V XEM KT QU Sau khi nhp y cc s liu cn thit, chng ta thc hin tnh ton v xem kt qu. c kt qu chnh xc, chng ta ly bi ton c th sau: Tnh ct thp (Fa) cho dm c tit din ch nht vi kch thc b x h = 25 x 50cm,

nhp 4,8m. Dng mc b tng 200, thp nhm AII, mmen tnh ton l M = 17,6Tm.

2.7.1 Chn kch thc tit din, nhp, ti trng, vt liu 1. Cho kch thc tit din v khu :

2. Chn vt liu b tng: chn theo tiu chun Nga B25, c cng c trng 18,5 MPa

tng ng mc b tng 200 ca Vit Nam (cng 19, 27 MPa).

3. Chn vt liu thp dc: chn nhm A-II.



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4. Chn vt liu thp dc: chn nhm A-I.

5. t ti: chn ti phn b nh hnh di.

2.7.2 Tip hnh tnh ton 1. Ra lnh bng mt trong cc cch sau:

Trn trnh n: Analysis Calculation.



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Thanh cng c: Start Calculation .

2. Hp thoi hin ra. Nhn chn cc phng n:

3. Generate drawings for calculated elements: c nh du, khi ng bn v b tr

thp cho cu kin c tnh ton. 4. Keep existing reinforcement: c nh du, c c cc ct thp c. 5. Nhn nt Calculate , qu trnh tnh ton din ra. 6. Nu iu kin ban u cho khng ph hp, xut hin hp thoi kt qu vi thng bo

nh hnh di.

Vic tnh ton vi din tch ct thp i hi khng kh thi. Tit din ngang c kch thc qu nh.

Vi thng bo ny, chng ta phi cho li s liu hoc ti trng hoc kch thc tit din ngang v.v

7. Nu c cc li khc, hp thoi Calculation Errors hin ra thng bo cc thng s tnh c.

Di y l kt qu bo li khi cho P1 = 200kN/m.



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Ti cho li P1 = 10kN/m, kt qu khng bo li.

8. Nu qu trnh tnh c kt qu ph hp, s khng hin ra bng thng bo no. 9. Kt qu c hin th ti cc mc c trnh by di y.

2.7.3 Xem biu 1. Nhn mc Beam Diagrams trn nh khung nhn ca bn v. Cc biu hin ra.



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2. Cc loi biu :

Bending moments: m men un. Shear Forces: lc ct.

3. Cc i lng c ch th bng mu theo ch thch bn di. 4. Cc t hp c ngha nh sau:

ULS (Ultimate Limit State): t hp theo trng thi gii hn cui cng. (c v ging TTGH1)

SLS(Service Limit State) : t hp theo trng thi gii hn trong giai on s dng. (TTGH2).

ACC : t hp ti trng ngu nhin.

2.7.4 Xem ct thp 1. Nhn mc Beam Reinforcements trn nh khung nhn ca bn v. Cc hnh ct

dc v ct ngang dm c b tr ct thp v bng thng k thp hin ra.

2. Cc nt cho n hoc hin cc thanh thp trn m hnh. 3. Nhn vo thanh thp no, cc thng s ca loi thanh c hin ra ti hp thoi

Reinforcing bar (gc di bn tri) v c bi en dng ca thanh ny ti bng thng k ct thp.

4. Ni dung hp thoi Reinforcing bar: nu nhn vo vung nh gc trn bn tri, hp thoi ny thu nh li nh hnh di.

Cc thng s ca thanh c hin th ti y. Hnh di bn tri l thanh dc mt trn, hnh di bn phi l thanh ngang (ct ai).



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Type: kiu thanh. Steel: nhm thp. Diameter: ng knh thanh. Shape: hnh dng thanh c m t bng hnh v bn cnh. A(m): di thanh. Left (Right) end: u bn tri (bn phi), c cc thng s:

o Hook: mc neo. o Hook length: di mc o Position X (Y hoc Z): v tr theo ta X, Y, Z.

5. Ni dung bng thng k:

General: tng th, gm cc thanh dc, ngang, cc nhm thp, ng knh, s lng v.v



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Detailed: ni dung chi tit.

Summary table: bng tng hp.

Spacings and areas: khong cch v din tch.

6. Chuyn thng k sang bng Excel:

Mi mc trn hp thoi l mt bng ring bit. Khi xut sang Excel, cng phi xut tng bng mt.

Nhn phi chut vo v tr bt k trong bng, chn Cnversion to EXCEL (CSV) format.

Hp thoi hin ra, g tn tp ti File name.



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Nhn Save. Tp lu tr c phn m rng *.CSV. V d hnh di l bng General trong Robot Str Analysis xut sang Excel.

Khi m bng t Excel c dng:

2.7.5 Xem kt qu bng vn bn 1. Nhn mc Beam note trn nh khung nhn ca bn v. Mt vn bn kt qu hin ra

nh hnh di. 2. Cc kt qu gm d liu ban u ca dm nh vt liu, kch thc, cc phng n thit

k, ti trng, kt qu tnh ton v cch b tr ct thp.



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3. Xut kt qu thnh vn bn *.rtf (Microsoft document):

Ra lnh File Save. Hp thoi hin ra.

Ti Save as type, chn kiu tp Rich text Format (RTF). G tn tp ti File Name. Nhn Save. Khi m bng t MS Word nh mt vn bn. C th chnh sa ty .



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2.7.6 Xem bn v ct thp Sau khi c kt qu, chng ta c th xem bn v ct thp.

1. Ra lnh bng mt trong cc cch sau:

Trnh n: Results Drawings.

Thanh cng c:

2. Mn hnh hin ra bn v k thut.



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3. Nhn phi chut vo t giy, chn Drawing Components hoc nhn nt .

4. Ranh gii cc khung nhn hin ra. Nhn tri chut vo mt khung nhn, nhn phi

chut, chn Edit Text, hp thoi hin ra sa ch. Nhn Apply, nhn Close kt thc sa.

5. Lu tr bn v di dng dxf: ch dng trong ni b Robot Str Analysis.



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Ra lnh File Drawing in a Different Format.

Hp thoi hin ra. Ti Save as type, chn kiu tp DXF file Format. G tn tp ti File Name. Nhn Save.

Bn ny ch lu tr trong Robot. Khi cn m ra bng cch nhn nt , hp thoi hin ra. Chn tp v m ra ti y.



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2.7.7 Chuyn bn v thp sang AutoCAD Structural Detailing b cc v in bn v ct thp tt hn, c th chuyn bn v ct thp t Robot Str.

Analysis sang AutoCAD Str. Detailing. 1. Ra lnh Result Structural Detailing.

2. Qu trnh chuyn d liu din ra.



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3. AutoCAD Str. Detailing c khi ng. Hp thoi hin ra.

Project: nhn chn New Project. Name: t tn. V d Dm 25x50. Tn ny s c trn tiu hnh v. Number of element: s cu kin. Nu trong cng mt bn Robot c nhiu cu

kin th chn bng cch g s. Nhn OK.

4. Bn v c khi to ti AutoCAD Str. Detailing nh hnh di.

Ht phn ny.

TNH TON CT THP CHO CC CU KIN RC ELEMENTS DESIGNTHIT TIU CHUNThit lp n vThit lp c s d liu DatabasesThit lp m hiu thit k Design codesChn vt liu cho tiu chunKt thc to tiu chun

THIT K CT THP DMKhi ng lnhChn thng s tng Story parametersCHN HNH DNG V CHO KCH THC THANH DMCho kch thc theo chiu di dmChn hnh dng v cho kch thc tit dinTo hc khot rng trn thn on dmTo hc khot rng trn thn on dm bng bng d liu

CHN PHNG N B TR CT THPRa lnhThit lp chung GeneralB tr ct thp lp y dm - Bottom ReinfB tr ct thp lp mt trn ca dm - Top ReinfB tr ct thp ngangCt thp cu to Constr. ReinforcementChn hnh dng ct thp Shapes

CHN PHNG N TNH TON CT THPRa lnhThit lp chung GeneralChn b tng ConcreteChn thanh ct thp dc Longitudinal reinforcementChn thanh ct thp ngang (ct ai) Transversal reinforcementChn thanh ct thp tng cng Additional reinforcement

T TI LOADSRa lnh t tiTi phn b - Distributed loadTi tp trung - Concentrated loadTi trng phng - Planar loadt ti bng bng Loads TableXem s t ti

TNH TON V XEM KT QUChn kch thc tit din, nhp, ti trng, vt liuTip hnh tnh tonXem biu Xem ct thpXem kt qu bng vn bnXem bn v ct thpChuyn bn v thp sang AutoCAD Structural Detailing

74577371 Robot RC Element Design 1 Beam

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