摘要
在桥梁的各种风振形式当中,颤振对桥梁的安全威胁最大,而在各种随机因素作用下的桥梁颤振概率性评价也受到了人们的重视。为了计算大跨度桥梁的颤振失效概率,推出了一种结合有限元分析和可靠度计算理论的随机有限元方法,考虑了质量、刚度、阻尼和颤振导数等随机因素对颤振临界风速的影响,并对我国第一座真正意义上的大跨度海上桥梁——东海大桥颗珠山斜拉桥进行了颤振可靠性分析。
Of various wind induced vibrations, flutter is the most dangerous menace to bridge safety. Therefore, the uncertainty of flutter has caused much concern on reliability assessment of bridge flutter under various random factors. To compute the probability of bridge failure due to flutter, this paper proposes a stochastic finite element method on flutter instability, which is a combination of finite element method and reliability calculation theory, including the influence of mass, stiffness, damping and flutter derivatives. The method is applied in the flutter reliability analysis of Kezhushan cable-stayed bridge in the East Sea Bridge Project.
出处
《工程力学》
EI
CSCD
北大核心
2007年第2期98-104,114,共8页
Engineering Mechanics
关键词
大跨度桥梁
颤振
随机有限元
可靠度
失效概率
long-span bridges
flutter
stochastic finite element method
reliability
probability of failure
