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description
MIDAS On-Demand Servicemidas Gen
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midas Gen
2nd midas Gen
Advanced Webinar
Mar 24th, 2011
Topic: Concrete Building Design
Presenter: Daekyo Koo
MIDAS On-Demand Servicemidas Gen
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midas Gen
Contents
1. Introduction of Design Features
2. Design of RC Building
3. Capacity Design for RC Building
4. Q & A
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One Stop Solution for Building and General Structures
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1. Introduction of Design Features
Design Type
Steel : Steel code check
Steel Optimal Design / Displacement Optimal Design
Concrete : Concrete code design
Concrete code check
RC Capacity Design
Meshed Slab/ Wall Design
Footing : design
Steel
RC
Footing
Design Procedure
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Design Feature (available in midas Gen)
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One Stop Solution for Building and General Structures
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Design Procedure Introduction
Available Design Code
RC Design Steel Design SRC Design
ACI318 AISC-LRFD SSRC79
Eurocode 2, Eurocode 8 AISC-ASD JGJ138
BS8110 AISI-CFSD CECS28
IS:456 & IS:13920 Eurocode 3 AIJ-SRC
CSA-A23.3 BS5950 TWN-SRC
GB50010 IS:800 AIK-SRC
AIJ-WSD CSA-S16-01 KSSC-CFT
TWN-USD GBJ17, GB50017 Footing Design
AIK-USD, WSD AIJ-ASD ACI318
KSCE-USD TWN-ASD, LSD BS8110
KCI-USD AIK-ASD, LSD, CFSD
Slab Design KSCE-ASD
Eurocode 2 KSSC-ASD
RC Design Steel Design Composite Design
Eurocode 2 (Irregular Section) Eurocode3(Irregular Section) Eurocode 4 (Irregular Section)
Footing Design
Eurocode 2 (L, interted T)
Gen 2010 (v2.1)
Gen 2011 (v1.1)
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PURPOSETo Learn RC Frame and Wall Design Features
2. Design of RC Building
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One Stop Solution for Building and General Structures
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Design Procedure
RC Design Limitation (Section)
Available Section Types
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One Stop Solution for Building and General Structures
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Design Procedure
Design
Based on the section size and the factored load obtained from the most unfavorable load combination, rebar data such as
rebar size and spacing are determined. Therefore, design can be performed when the section size is determined without
rebar data.
Checking
Strength verification can be performed by automatic design or by using the information of rebars (diameter, number and
design parameters) entered by the user. The results appear in blue when the strength verifications for the given section
properties and rebars are satisfactory, otherwise they appear in red.
Difference between Design and Checking
•Automatic Design by Gen
•Manual Calculation
Design
•Automatic Rebar update
•Modify Rebar Input Data
Rebar Input•Strength Verification with Updated Rebars
Check
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Design Procedure
Ultimate Limit State Design (3)
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Design Procedure
Meshed slab and wall design
• Slab and wall design for meshed plate elements as per Eurocode2-1-1:2004• Slab design for non-orthogonal reinforcement directions based on the Wood-Armer formula• Smooth moment and shear forces• Automatic generation of Static wind and seismic loads for flexible floors• Detailing for local ductility
Wall design
Slab serviceability checking
Punching shear check result
Slab flexural design
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One Stop Solution for Building and General Structures
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Design Procedure
Wall Design
Members requiring reinforcement
In locations where σEdy is tensile or σEdx ⋅ σEdy ≤ τ2Edxy
Members not requiring reinforcement
In locations where σEdx and σEdy are both compressive and σEdx ⋅ σEdy > τ2
Edxy
Limitation in concrete stress
σcd ≤ νfcd
Wall design results are provided in contour, detailed rep
ort, and design force table. Also, concrete stress (σcd) ca
n be checked with νfcd.
The following results are provided from wall design:
Rebar spacing and diameter
Required rebar area & Required rebar ratio
Resistance ratio
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Wall element
Division of Wall element between story is not
allowed.
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Design of Multi Story RC Building
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Typical Sectional Plan
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Typical Floor Elevation
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Wall ID
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Overview (Slab Design)
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Overview (Slab Design)
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PURPOSETo Learn Capacity Design features
3. Capacity Design for RC Building
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One Stop Solution for Building and General Structures
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Design Procedure
Seismic Design procedure as per EN1998-1:2004
Performance RequirementPerformance Requirement
Ground ConditionGround Condition
Seismic ActionSeismic Action
Combination of Seismic ActionCombination of Seismic Action
Criteria for Structural RegularityCriteria for Structural Regularity
Seismic AnalysisSeismic Analysis
Safety VerificationSafety Verification
Capacity Design & DetailingCapacity Design & Detailing
•Seismic Zone•Representation of seismic action
[Method of Analysis][Method of Analysis]•Lateral Force method of Analysis•Modal Response Spectrum Analysis•Pushover Analysis•Inelastic Time History Analysis
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One Stop Solution for Building and General Structures
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Design Procedure
Capacity Design Feature
• structures to provide the appropriate amount of ductility in the corresponding ductility classes.• Automatic capacity design capability for beam, column, wall and beam-column joint• EN 1998-1: 2004 (DCM/DCH), NTC2008 (CD “B”, CD “A”), ACI318-05• Design action effects are calculated in accordance with the capacity design rule. Special provision for
ductile primary seismic walls is considered.• Detailing for local ductility is considered.
- max/min reinforcement ratio of the tension zone- the spacing of hoops within the critical region- mechanical volumetric ratio of confining hoops with the critical regions
Capacity design shear forces on beams
Define ductility class and check design results Design envelope moments in walls
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Design Procedure
Design member forces (Design moments)
Where,
MRb: Beam moment resistance
Mce : column member force due to seismic load case
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One Stop Solution for Building and General Structures
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Design Procedure
Design member forces (Design shear forces)
Capacity design values of shear forces on beams
Capacity design shear force in columns
Where, MRb: Beam moment resistance
MRc: Column moment resistance (calcul
ated using same axial force ratio in
PM interaction curve)
Mce: Bending moment of column due to
seismic load case
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Design Procedure
Design envelope for bending moments in slender walls Design envelope of the shear forces in the walls of a dual system
Design member forces (Wall design forces)
Wall systems Dual systems
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Capacity Design of Multi Story RC Building
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Integrated Design System for buildings and General StructuresWhy midas GenWhy midas Gen
GSD (General Section Designer)
Stress Contour
Moment- Curvature
Definition of any irregular cross-
section
Section properties
P-M, P-My-Mz, M-M interaction
curves
Calculation of Section Capacity (in
flexure) and Safety Ratio based on
member forces.
Moment-Curvature curve.
Plot of Stress contours
All the above features are supported
for: RC sections, Steel sections
and Composite sections.
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Integrated Design System for buildings and General StructuresWhy midas GenWhy midas Gen
GSD (General Section Designer)
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Integrated Design System for buildings and General StructuresWhy midas GenWhy midas Gen
Dynamic Report Generator
Word format reports can automatically be generated for selected input &
output data (figures, tables, graphs, and text).
MIDAS On-Demand Servicemidas Gen
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Integrated Design System for buildings and General StructuresWhy midas GenWhy midas Gen
Dynamic Report Generator
Using “Dynamic Report Regenerator” function, changes of a model file are
automatically updated in the report.
User defined report format can be used and saved.
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Drag & Drop
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Q & A
Thank you
4. Q & A