Extension of Modal Pushover Analysis to Compute Member Forces | Zendy

Goel Rakesh K. | Zendy; Chopra Anil K. | Zendy

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Extension of Modal Pushover Analysis to Compute Member Forces

Author(s) -

Goel Rakesh K.,

Chopra Anil K.

Publication year - 2005

Publication title -

earthquake spectra

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.134

H-Index - 92

eISSN - 1944-8201

pISSN - 8755-2930

DOI - 10.1193/1.1851545

Subject(s) - modal , structural engineering , nonlinear system , extension (predicate logic) , deformation (meteorology) , mode (computer interface) , modal analysis , response spectrum , engineering , mathematics , geology , computer science , finite element method , physics , materials science , oceanography , quantum mechanics , polymer chemistry , programming language , operating system

This paper extends the modal pushover analysis (MPA) procedure for estimating seismic deformation demands for buildings to compute member forces. Seismic demands are computed for six buildings, each analyzed for 20 ground motions. A comparison of seismic demands computed by the MPA and nonlinear response history analysis (RHA) demonstrates that the MPA procedure provides good estimates of the member forces. The bias (or error) in forces is generally less than that noted in earlier investigations of story drifts and is comparable to the error in the standard response spectrum analysis (RSA) for elastic buildings. The four FEMA-356 force distributions, on the other hand, provide estimates of member forces that may be one-half to one-fourth of the value from nonlinear RHA.

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