Time-domain seismic reliability of nonlinear structures

    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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