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Cumulative damage of structures subjected to response spectrum consistent random processes

Jeong, Garrett Duane (1985) Cumulative damage of structures subjected to response spectrum consistent random processes. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechEERL:1985.EERL-85-03

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Abstract

A theoretical analysis of the effect of duration on the damage of structures subjected to earthquakes is presented. Earthquake excitation is modeled as a nonstationary random process. Estimates of the firstpassage probability of a simple oscillator are employed to choose modulated Gaussian random processes consistent with a prescribed response spectrum. The response spectrum is assumed to be specified independent of the duration. Expressions for the mean damage of a structure are derived using an approach similar to the Miner-Palmgren rule for failure caused by cyclic loads. The expected damage expressions are then evaluated for a structure subjected to modulated Gaussian random processes of varying duration. Two types of structures are examined: a steel structure and a reinforced concrete structure. Results are presented for systems with constant linear stiffness and a particular form of softening behavior. The nonlinearity of the softening system is accounted for by statistical linearization. The level of expected damage is found to be a strong function of both the duration of the excitation and the ductility of the response.


Item Type:Report or Paper (Technical Report)
Additional Information:PhD, 1985: PB-86-100807
Group:Earthquake Engineering Research Laboratory
Record Number:CaltechEERL:1985.EERL-85-03
Persistent URL:http://resolver.caltech.edu/CaltechEERL:1985.EERL-85-03
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:26373
Collection:CaltechEERL
Deposited By: Imported from CaltechEERL
Deposited On:12 Oct 2001
Last Modified:26 Dec 2012 13:56

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