What “Main Wind Force Resisting System” (MWFRS) Design Wind Load Cases does Shearwalls Analyze?
ASCE7-02 “All heights” method shows 4 cases that require consideration in designing for MWFRS, as per Figure 6-9 and Section 6.5.12.3. Shearwalls accounts for Case 1 (full, non-torsional loading for each orthogonal direction independently) and Case 2 (partial torsional loading for each orthogonal direction independently). Shearwalls does not account for Cases 3 and 4 (with diminished loading in each direction simultaneously) which analysis showed would not govern for structures modelled by Shearwalls. Distribution of shear loads based on a Flexible diaphragm analysis only uses the Case 1 loading, while for Rigid diaphragm analysis, both Case 1 and 2 loads are used. Both rigid and flexible design is done simultaneously, but it is up to the user to determine which distribution method is appropriate; the software does not do a direct comparison. For the All-heights Rigid diaphragm analysis, the user must run the analysis engine two times in order to view results from case 1 and case 2. Sw
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- What "Main Wind Force Resisting System" (MWFRS) Design Wind Load Cases does Shearwalls Analyze?
