摘要
在综合考虑结构几何非线性和静风荷载非线性的基础上提出一种大跨径桥梁空气静力稳定性的计算方法 ,并编制了相应的计算软件BNAP。然后分别对汕头海湾二桥 (斜拉桥 )和虎门大桥 (悬索桥 )的空气静力稳定性进行了计算。从计算结果中主梁跨中点处位移随风速的变化图入手 ,选取几个关键点 ,结合这几个关键点处结构的变形情况和对应的三分力系数变化情况 。
A new method of aerostatics stability for long?span bridge is proposed in the paper.The nonlinearity of the structural geometry and wind load is taken into account in the study .Two loops are used to solve the nonlinear equations.The inner loop is controlled by the coefficient of three components,and the wind velocity is used to control the outside loop.A computer program(BNAP)is developed to analyze the aerostatics stability for some structures.Some engineering projects such as Shantou Second Bridge and Human Bridge are selected as the examples.The results show that the mechanism of aerostatics instability for long-span bridges is discussed in detail.
出处
《土木工程学报》
EI
CSCD
北大核心
2002年第1期35-39,共5页
China Civil Engineering Journal
基金
国家自然科学基金重大资助项目(批准号:59895410)
关键词
大跨度桥梁
静风稳定
空气静力
失稳机理
long-span bridges
aerostatics stability
aerostatics instability mechanism
