【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。更多还原

【Abstract】 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.更多还原