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SEISMIC CALCULATIONSASCE/SEI 7-02 and 7-05 'Christy

TANK SUPPORT17:06

Not Included on the CD-ROM 4/21/23

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Copyright 2006 American Society of Civil Engineers

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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 /

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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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