Stability of an explicit time-integration algorithm for hybrid tests, considering stiffness hardening behavior

作     者：Wang Tao Zhou Huimeng Zhang Xipeng Ran Tianran 

作者机构：Key Laboratory of Earthquake Engineering and Engineering VibrationInstitute of Engineering MechanicsCEA 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2018年第17卷第3期

页      面：595-606页

核心收录：

学科分类：081405[工学-防灾减灾工程及防护工程] 08[工学] 0814[工学-土木工程] 

基　　金：Scientific Research Fund of the Institute of Engineering Mechanics,CEA under Grant Nos.2017A02,2016B09 and 2016A06 the National Science-technology Support Plan Projects under Grant No.2015BAK17B02 the National Natural Science Foundation of China under Grant Nos.51378478,51408565,51678538 and 51161120360 

主　　题：explicit integration algorithm unconditional stability HHT-α algorithm stiffness identification root locus method 

摘      要：An explicit unconditionally stable algorithm for hybrid tests,which is developed from the traditional HHT-α algorithm,is *** unconditional stability is first proven by the spectral radius method for a linear *** the value of α is selected within [-0.5,0],then the algorithm is shown to be unconditionally ***,the root locus method for a discrete dynamic system is applied to analyze the stability of a nonlinear *** results show that the proposed method is conditionally stable for dynamic systems with stiffness *** improve the stability of the proposed method,the structure stiffness is then identified and *** numerical and pseudo-dynamic tests on a structure with the collision effect prove that the stiffness updating method can effectively improve stability.