钢管混凝土拱桥弹性动力稳定性能研究

英文篇名：Study on elastic dynamic stability of a CFST arch bridge
中文刊名：地震工程与工程振动
英文刊名：Earthquake Engineering and Engineering Vibration
作者：徐艳 ; 胡世德
英文作者：Xu Yan ; Hu Shide(Department of Bridge Engineering ; Tongji University ; 200092 Shanghai ; China)
中文关键词：钢管混凝土 ; 拱桥 ; 弹性 ; 动力稳定 ; 地震
英文关键词：CFST arch bridge ; elastic ; dynamic stability ; earthquake
出版日期：2006-08-30
机构：同济大学桥梁工程系,同济大学桥梁工程系上海200092,上海200092
年：2006
期：04
出版单位：地震工程与工程振动

摘要

基于运动稳定性理论,以1座实际的钢管混凝土肋拱桥为例,利用改进的时间冻结法(动态特征值法)求得结构在地震波作用下的动态稳定系数时间历程,研究了不同输入方向和阻尼比对动力稳定临界系数的影响,并探讨了地震波作用下拱桥的稳定安全系数,对钢管混凝土拱桥的弹性动力稳定性能作出了评估。
Based on the theory of kinetic stability,the modified time frozen method(dynamic eigenvalue method) is developed to analyze the elastic dynamic stability of a real CFST arch bridge by extracting the minimum dynamic buckling eigenvalues under the earthquake excitation.The influence of earthquake input directions and damping ratios on the elastic dynamic stability is discussed as well as the stability safety factors of arch bridge under an earthquake.The dynamic stability performance of the CFST arch bridge is then evaluated.

引文

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