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Activity Number: 28 - Computation, Design, and Quality Assurance of Physical Science and Engineering Applications
Type: Contributed
Date/Time: Sunday, August 8, 2021 : 1:30 PM to 3:20 PM
Sponsor: Section on Physical and Engineering Sciences
Abstract #318661
Title: Empirical Estimation of the Effect of Frequency Content of Earthquake Ground Motions on Structural Collapse Risk Based on Generalized Linear Model
Author(s): Min Shu and Ruiqiang Song
Companies: Michigan Technological University and University of Wisconsin Stout
Keywords: earthquake; ground motion; structural collapse; frequency content; generalized linear model

This paper empirically estimates the influence of frequency content of earthquake ground motions on structural collapse risk for both nonlinear single degree of freedom and multiple degrees of freedom steel framed systems by using the generalized linear model. The mean period Tm is selected to measure the frequency content of earthquake ground motions. A set of 126 seismic records characterized by a wide range of frequency content are selected to determine structural collapse capacity of a nonlinear single degree of freedom system and a typical 4-story steel framed building with deterioration properties by incremental dynamic analysis. The results indicate that the frequency content of ground motion has a significant impact the structural collapse capacity. The generalized linear modeling regression technique is used to predict the mean value of structural collapse capacities. Given a specific seismic intensity level, a building may be more susceptible to damage and have a higher collapse risk when it is subjected to the larger T_m records. This research will facilitate the estimation of structural collapse risk and improve the current structural design practice.

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