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CALIBRATING COMPUTER MODELS FOR SEISMIC ANALYSIS: CASE STUDIES USING INSTRUMENTED BUILDING RECORDS

by Daniel Swensen and Sashi Kunnath

Daniel Swensen and Sashi Kunnath (2012). CALIBRATING COMPUTER MODELS FOR SEISMIC ANALYSIS: CASE STUDIES USING INSTRUMENTED BUILDING RECORDS SMIP12 Seminar on Utilization of Strong-Motion Data, p. 57 - 68.

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Abstract

Modern performance-based seismic evaluation of buildings calls for nonlinear analysis of the structural system to estimate seismic demands and assess building performance. The availability of new software with expanded capabilities is gradually making it more feasible to conduct fully nonlinear simulations of building systems. However, at present, there are no readily available guidelines to aid a structural engineer in the process of building an appropriate nonlinear model of the system. As an initial step towards developing such guidelines, the suitability of three widely used computer programs (SAP2000, Perform-3D and OpenSEES) for seismic evaluation of buildings is investigated in this project by utilizing response data recorded from instrumented buildings and comparing the performance of different nonlinear models and methods in terms of their predictive abilities and response sensitivity to modeling choices. Preliminary findings from a preliminary set of simulations on a 9-story steel moment frame building are reported in this paper.