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《Journal of Earthquake Engineering and Engineering Vibration》 2009-01
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Probabilistic research on capacity curve in pushover analysis

YI Weijian,Jiang Die(Civil Engineering Department,Hunan University,Changsha 410082,China)  
On the basis of studies about probabilistic analysis of the pushover method and the combination of Chinese seismic code(GB50011-2001) and the statistic parameters of earthquake action,a new computing method used for calculation of reliability of the structural capacity curve obtained from the pushover analysis is developed.With the pushover analysis,the sequence and number of the plastic hinges of a structure is taken as the dominant failure mode.The influence of probabilistic characteristics of the structure resistance and earthquake action on the structural capacity curve is considered.With the sensitivity analysis of main random variables,the reliability of a determinate capacity curve analyzed by pushover method can be obtained.A numerical example of a frame structure demonstrates the calculation results.The accuracy of the method is also verified by the importance sampling method.
【Fund】: 国家自然科学基金项目(50678064);; 湖南省科技计划重点项目(06FJ3003)
【CateGory Index】: TU352.11
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