Title

Inelastic analyses of a 17-story steel framed building damaged during Northridge

Authors

Authors

W. M. Chi; S. El-Tawil; G. G. Deierlein;J. F. Abel

Comments

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Abbreviated Journal Title

Eng. Struct.

Keywords

seismic; earthquake; inelastic analysis; steel frame; connections; fracture; dynamic analysis; building; Engineering, Civil

Abstract

A series of two-and three-dimensional static and dynamic inelastic frame analyses are performed for a 17-story steel moment frame building damaged by the 1994 Northridge earthquake. The primary objectives of the study are to: (1) exercise state-of-the-art inelastic static and dynamic analyses for the evaluation and design of steel buildings; (2) establish to what degree frame analyses can be used to predict the types of brittle connection damage that occurred during the Northridge earthquake; and (3) investigate the reliability of the analyses and the influence of modeling parameters on computed performance indices. In general, this study shows that calculated interstory drift ratios and curvature demands obtained from inelastic time history analyses correlate reasonably well with the pattern of connection damage observed in the building. However, there is significant scatter in the computed deformation demands that are strongly dependent on the degree to which three-dimensional torsion, secondary structural elements and strength/stiffness degradation (associated with connection fractures) are modeled in the analyses. Further, comparisons of static and dynamic analyses indicate that for this building static pushover analyses do not capture higher vibration modes that are significant. (C) 1997 Elsevier Science Ltd.

Journal Title

Engineering Structures

Volume

20

Issue/Number

4-6

Publication Date

1-1-1998

Document Type

Article; Proceedings Paper

Language

English

First Page

481

Last Page

495

WOS Identifier

WOS:000071583600026

ISSN

0141-0296

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