Experimental Study and Numerical Response Prediction of a Steel Moment-Frame With Taking Fatigue Damage Into Account

Abstract eng:
In this study, shaking-table test results of a steel moment-frame with end-plate bolted connections are presented. These experimental tests were carried out to understand the behavior of steel moment-frame structures subjected to dynamic and seismic loads. The purpose of these tests is also to study the changes in modal parameters due to the development of the elastoplastic behavior and Low Cycle Fatigue LCF damage in bolted steel frame connections. The study presents a nonlinear numerical simulation of the steel moment-frame that was performed using a Fatigue Damage-Based Hysteretic FDBH model. The developed model is a degrading hysteretic model based on the LCF damage index. A comparison of the results obtained from numerical analysis and those of shaking table tests is presented. A reasonable agreement is observed, indicating a good simulation of the nonlinear behavior of the steel moment-frame by using the developed model.

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