Determine the lateral wind and seismic forces in the transverse direction for the two- story office building in Fig. 3.13a. For the critical loading, determine the unit shear in the transverse shearwalls at the midheight of the first- and second-story walls. Assume that there are no openings in the masonry walls.

Structural Analysis
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Chapter2: Loads On Structures
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EXAMPLE 3.10 Two-Story Lateral Force Calculation, Base Shear and Shearwalls
Determine the lateral wind and seismic forces in the transverse direction for the two-
story office building in Fig. 3.13a. For the critical loading, determine the unit shear in
the transverse shearwalls at the midheight of the first- and second-story walls. Assume
that there are no openings in the masonry walls.
ROOF
2ND FLR
2a
w = UNIFORM SEISMIC FORCE
1ST FLR
L-2a
S
Wend UNIFORM WIND FORCE IN END ZONE
Wint =UNIFORM WIND FORCE IN
INTERIOR ZONE
L = 60'
PLAN
32'
Wr
W₂
DIMENSIONS
FOR TRIB. HT.
7.6 pof
INTERIOR
ZONE
END
ZONE
CONNE
DENN
11.5 pef-
TRANSVERSE SECTION
Figure 3.13a Wind pressures and tributary heights to roof and second-floor
diaphragms.
Transcribed Image Text:EXAMPLE 3.10 Two-Story Lateral Force Calculation, Base Shear and Shearwalls Determine the lateral wind and seismic forces in the transverse direction for the two- story office building in Fig. 3.13a. For the critical loading, determine the unit shear in the transverse shearwalls at the midheight of the first- and second-story walls. Assume that there are no openings in the masonry walls. ROOF 2ND FLR 2a w = UNIFORM SEISMIC FORCE 1ST FLR L-2a S Wend UNIFORM WIND FORCE IN END ZONE Wint =UNIFORM WIND FORCE IN INTERIOR ZONE L = 60' PLAN 32' Wr W₂ DIMENSIONS FOR TRIB. HT. 7.6 pof INTERIOR ZONE END ZONE CONNE DENN 11.5 pef- TRANSVERSE SECTION Figure 3.13a Wind pressures and tributary heights to roof and second-floor diaphragms.
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