Failure Mode Analysis for Column over Designed Ductile Frames

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Abstract:

In ultimate asseismic design of ductile frame structures, plastic deformation and plastic hinge are generally permitted, and some preferred failure modes are often selected. It is an important problem that whether the designed structure collapses according to the designed failure mode, because of the large uncertainties included in external loads and member strength. In this paper, an identification procedure of failure modes for frame structures is developed, and the likely collapse modes of frame structures under uncertain load and member strength are investigated under assumption of normal distributed and non-normal distributed external loads and member strength. It is found that the occurrence order of likely collapse mode is much influenced by the distribution of the random variables. The occurrence order of collapse modes for column over designed structures are investigated and it is found that the increase of column over-design factor can effectively avoid the story collapse mode in probabilistic means.

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Periodical:

Key Engineering Materials (Volumes 340-341)

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1393-1398

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Online since:

June 2007

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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[1] H. Kuwamura, M. Sakai, and B. Kato: Mechanism-Based Seismic Design Considering Random Yield Strength, JSCE, No. 401, (1989), (In Japanese).

Google Scholar

[2] A.M. Nafday: Failure Mode Identification for Structural Frames, Journal of Structural Engineering, ASCE, Vol. 113, No. 7 (1987).

Google Scholar

[3] R.E. Melchers and L.K. Tang: Failure mode in complex stochastic systems, ICOSSAR'85, Vol. 1 (1985), 97-106.

Google Scholar

[4] K. Ohi: Stochastic Limit Analysis of Framed Structures, Structural Safety and Reliability, Vol. 2, JCOSSAR'91, (1991). 675-678. (In Japanese).

Google Scholar

[5] H. Aoyama and T. Kamimura: Matrix Method of Structural Analysis, Baifukan (1988) (in Japanese).

Google Scholar

[6] A. H-S. Ang and W. Tang: Probability Concepts in Engineering Planning and Design, Vol II - Decision, Risk, and Reliability, J. Wiley & Sons, New York (1984).

Google Scholar