Response Spectra of Strain Hardening Structural Systems to Earthquake Motions

[+] Author and Article Information
T. Hongladaromp, D. Srimahachota

Asian Institute of Technology, Bangkok, Thailand

S. L. Lee

Division of Structural Enginering and Mechanics, Asian Institute of Technology, Bangkok, Thailand

J. Eng. Ind 96(2), 399-404 (May 01, 1974) (6 pages) doi:10.1115/1.3438343 History: Received June 06, 1973; Online July 15, 2010


The effect of strain hardening in limiting the forces developed in structures subjected to earthquake motions below those of the elastic behavior is investigated by treating a single degree of freedom system. Response spectra for El Centro earthquake, May 1940 are generated from an idealized bilinear strain hardening resisting force-displacement relation for different values of the strain hardening coefficient and ductility factor. Optimum response spectra are presented in terms of the yield displacements and the maximum displacements. For a system with the optimum yield displacement, the maximum displacement response is always less than that of the elastic system, and thus the optimum response spectra may be used as a guide in selecting members for a displacement constrained design.

Copyright © 1974 by ASME
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