39 Seismic ASCE 7-02-05
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Transcript of 39 Seismic ASCE 7-02-05
Page 39 - 1
document.xls
SEISMIC CALCULATIONSASCE/SEI 7-02 and 7-05 'Christy
TANK SUPPORT17:06
Not Included on the CD-ROM 4/21/23
ENGINEERING with the SPREADSHEET
Copyright 2006 American Society of Civil Engineers
A B C D E F G H I J K L M N
39
SEISMIC ASCE/SEI 7-02 and 7-05
Figure 39-1 This is the map for the 1.0 second Figure 39-2 This is the map for the 0.2 secondspectral response acceleration. spectral response acceleration.
Note: USGS maps are 5% of Critical Damping, Site Class B. Near sourcefactors Na and Nv are accounted for in the seismic maps and lookup tables
ASCE 7-02 and 7-05 callouts are presented as 7-02 / 7-05 for ease of cross-referencing
Site Class D Site Classification Tables 1-1, 9.13 and 9.14 / Tables 1-1 and 11.5-1D Stiff soil 600 < vs < 1,200 15 < N < 50 1,000 < su < 2,000 SUG III Seismic Use Group Table 9.1.4 / Table 1-1 row 40
1.25 unitless occupancy importance factor
0.9692 mapped maximum spectral response acceleration at short periods for Site Class B
1.1123 unitless Velocity Based Site Coefficient for short periods Table 9.4.1.2.4a / Table 11.4-1
1.0781 1.1123 * 0.9692
0.7187 2/3 1.0781
Eq. 11.4-1
0.3584 row 50
1.6832 unitless Velocity Based Site Coefficient at T = 1.0 sec Table 9.4.1.2.4b / Table 11.4-2
0.6033 1.6832 * 0.3584
0.4022 2/3 0.6033
Eq. 11.4-2
row 60
IE
SS g ultimate
Fa
SMS g ultimate Fa SS Eq. 9.4.1.2.4-1 / Eq. 11.4-1
SDS g ultimate 2/3 SMS design response accelleration at short periods Eq. 9.4.1.2.5-1 /
S 1 g ultimate mapped maximum response accelleration at T = 1.0 sec Table 9.4.1.2.4b / Table 11.4-2
Fv
SM1 g ultimate Fa S1 Eq. 9.4.1.2.4-1 / Eq. 11.4-2
SD1 g ultimate 2/3 SM1 design response accelleration at short periods Eq. 9.4.1.2.5-2 /
Page 39 - 2
document.xls
SEISMIC CALCULATIONSASCE/SEI 7-02 and 7-05 'Christy
TANK SUPPORT17:06
Not Included on the CD-ROM 4/21/23
ENGINEERING with the SPREADSHEET
Copyright 2006 American Society of Civil Engineers
A B C D E F G H I J K L M N
39
EQUIVALENT LATERAL FORCE PROCEDURE 9.5.5ASCE 7-02 and 7-05 callouts are presented as 7-02 / 7-05 for ease of cross-referencing
R 3 unitless response modification coefficient Tables 9.5.2.2 and 9.14.5.1.1 / Table 12.1-1
3 unitless system over-strength factor
2.5 unitless deflection amplification factor
4 lookup0 logic (4 > 5) lookup selection for Site Class Categories A, B, C, D Eqs. 9.5.5.2.1 - 2 & 3
Site Class A has been removed from ASCE 7-05 row 70
0.4022 IF(0, 0.900 ASCE 9.4.1.3.4, 0.402 ASCE 9.4.1.2.4b )
0.7187 IF(0, 0.090 ASCE 9.4.1.3.4, 0.719 ASCE 9.4.1.2.4a)
0.2995
0.719 /(3.0 /1.25)
1.6757
0.402 /0.100 /(3.00 /1.25) row 80
0.0395
0.044 * 0.719 * 1.25
0.07470.5 * 0.358 /(3.0 /1.25)
Site Class 4 lookup Table 9.4.1.2 Site Classification
0.040 IF(4 < 6, 0.040, 0.075 Site Classes E & F) row 90
0.299 MAX( MIN(0.299, 1.676), 0.040) seismic response coefficient, ultimate strength
0.214 0.299 /1.4 seismic response coefficient, working stress
Values from the '97 UBC are: 0.304 Ultimate 98.5 %0.217 Allowable Stress Design
For errata to the ASCE 7-02, click on:7-02 Errata row 1007-02 Symbols7-02 Updated Snow Diagram7-02 Updated Snow Diagram
For maps
row 110
Ωo
Cd
Site Classification Table 9.4.1.2 / ?????
SD1_ g ultimate
SDS_ g ultimate
Cs 1 g ultimate SDS /(R_ /I) Seismic design coefficient (Eq 9.5.5.2-1)
Cs 2 max g ultimate SD1 /T /(R_ /I) (Eq. 9.5.5.2.1-2)
Cs 3 min g ultimate 0.044 * SDS * I (Eq. 9.5.5.2.1-3)
Cs 4 min g ultimate 0.5 * S 1 /(R_ /I) (Eq 9.5.5.2.1-4) for design categories E and F
Cs g ultimate
for V = Cs W Eq. 9.5.5.2-1 / Eq. 12.8-1g ASD
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