Preliminary communication

Superposition of Modal Responses in Spectral Analysis

Tanja Kalaman
Vladimir Sigmund

Abstract

Modal analysis is a standard method for a structure earthquake response analysis. The combination of various response modes is not standardized and there are three most often used methods of modal superposition: ABS, SRSS and CQC. Exact results of seismic response are obtained by time history analysis, we using a set of representative earthquakes. In order to evaluate the validity of different superposition methods, were defined building models that cover a broad range of interest regarding stiffness (and its distribution along the height and in floor) and their response time histories were analyzed for a set of ground motions that represent soft and stiff ground. The suggestions for everyday use were outlined.

Keywords

spectral analysis; time history; model structures; response combination rules

Hrčak ID:

13506

URI

https://hrcak.srce.hr/13506

Publication date:

31.7.2007.

Article data in other languages: croatian

Visits: 7.365 *