【作者】 李黎； 刘文静； 张行；

【Author】 LI Li~(1,2),LIU Wen-jing~(1,2),ZHANG Hang~(1,2) (1.School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China; 2.Hubei Key Laboratory of Control Structure,Huazhong University of Science and Technology,Wuhan 430074,China)

【机构】 华中科技大学土木工程与力学学院； 华中科技大学控制结构湖北省重点实验室；

【摘要】 结构动力稳定性是结构分析的前沿课题,有着重要的理论和实际应用价值。在桥梁工程中,稳定问题经常遇到,与强度问题有着同等重要的意义。本文探讨了动力稳定分析的原理,采用时程分析与特征值届曲分析相结合的方法,研究了在地震作用下,隔震桥梁的弹性动力稳定问题,并以一座双层墩引桥为实例,考虑温度造成的初偏心,进行了地震作用下,其8种工况的稳定计算和分析。结果表明,隔震桥梁虽然采用隔震支座,取消了固定墩,但仍具有非常良好的地震动力稳定性能。更多还原

【Abstract】 Structural dynamic stability,with important theoretical and practical application value,is the advanced topic on structural Analysis.In bridge engineering,stability problem is offen encountered,witch has epual important significance.In this artical,the principle of dynamic stability is discussed,dynamic stability of isolated bridges by earthquake is studied use combination of time-history and eigenvalue bucking analysis,a double-layer-pier bridge approach is adopted as a practical work,it is calculated and analysed under 8 conditions of stability,initial eccentricity caused by temperature is considered.The results show that although isolated bridges introduce isolated bearing and abrogate the fixed pier,they still have very favourable dynamic stability under eathquak.更多还原