Title

Time-domain seismic reliability of nonlinear structures

Authors

Authors

A. Haldar; J. Huh;A. Mehrabian

Comments

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Abbreviated Journal Title

Sadhana-Acad. Proc. Eng. Sci.

Keywords

reliability analysis; seismic analysis; nonlinear response; partially; restrained connections; shear walls; post-Northridge connections; RESPONSE-SURFACE APPROACH; SHEAR WALL; PR CONNECTIONS; FRAMES; BEHAVIOR; SYSTEMS; Engineering, Multidisciplinary

Abstract

A novel reliability analysis technique is presented to estimate the reliability of real structural systems. Its unique feature is that the dynamic loading's can be applied in time domain. It is a nonlinear stochastic finite element logarithm combined with the response surface method (RSM). It generates the response surface around the most probable failure point and incorporates information of the distribution of the random variables in the RSM formulation. It is verified using the Monte Carlo simulation technique, and is found to be very efficient and accurate. Most sources of nonlinearlity and uncertainty can be explicitly incorporated in the formulation. The flexibility of connections, represented by moment-relative rotation (M-theta) curves, is addressed. After the Northridge earthquake of 1994, several improved steel connections were proposed. Structural Sesimic Design Associates (SSDA) tested several full-scale proprietory slotted web beam-column connections. The authors suggested (M-theta) curves for this connection using actual test data. Behaviours of steel frames, assuming, the connections are fully restrained, partially restrained, consisting of pre- and post-Northridge connections are evaluated and compared. Desirable features of the post-Northridge connections observed during testing are analytically confirmed. Laterally weak steel frame is then strengthened with concrete shear walls. Capabilities and the advanced nature of the method are demonstrated with the help of realistic examples.

Journal Title

Sadhana-Academy Proceedings in Engineering Sciences

Volume

31

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

359

Last Page

382

WOS Identifier

WOS:000240666100006

ISSN

0256-2499

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