Asce | 7-05 Seismic Pdf

Raw ground motion parameters must be scaled to reflect local soil profile characteristics (ranging from Site Class A for hard rock to Site Class F for liquefiable soils). Site coefficients Facap F sub a Fvcap F sub v amplify or attenuate the hazard:

: A dynamic analysis method required for tall, complex, or highly irregular buildings.

For most standard buildings, the ELF procedure is used to find the Seismic Base Shear ( asce 7-05 seismic pdf

): ASCE 7-05 uses traditional geomean hazard maps with a 2% probability of exceedance in 50 years. ASCE 7-10 introduced risk-targeted hazard maps aimed at delivering a uniform 1% probability of collapse in 50 years.

The ELF procedure is the most common simplified method used for regular structures. Determine the Fundamental Period ( Raw ground motion parameters must be scaled to

Fx=Cvx⋅Vcap F sub x equals cap C sub v x end-sub center dot cap V

SM1=Fv⋅S1cap S sub cap M 1 end-sub equals cap F sub v center dot cap S sub 1 ASCE 7-10 introduced risk-targeted hazard maps aimed at

ASCE 7-05 treats wind loads using service-level forces, whereas ASCE 7-10 shifted wind to a strength-design (ultimate) basis. Seismic loads remained on a strength basis in both.