采用减震榫桥梁非线性动力学分析计算方法  

AN APPROACH TO NONLINEAR DYNAMIC ANALYSIS OF BRIDGE WITH ASEISMIC ABSORBERS

作　　者：梁轩[1] 杜建镔[1] 

机构地区：[1]清华大学航天航空学院,北京100084

出　　处：《工程力学》2016年第4期136-143,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(11372154)

摘　　要：针对采用新型减震榫的桥梁及支座动力学分析问题,建立了基于悬臂梁横向弯曲运动理论的非线性动力学模型,提出了一种基于广义?法的时间积分算法,能够充分利用准静态实验测得的支座力学性能曲线,通过数值计算得到支座在典型激励下的动力学响应。数值算例表明:新方法具有很高的计算精度,能够准确有效地求解减隔震支座非线性动力学问题。该文的工作可为进一步评估该支座的工作性能以及改进结构设计提供参考。Specific to the problem of the dynamic analysis of a new-type bridge bearing with aseismic absorbers, a nonlinear dynamic model according to the theory of bending motion for a cantilever beam is established and an extended time integration method based on the generalized-a method is presented, where the curves of the mechanical properties of the bearing measured by a quasi-static test can be fully utilized. The dynamic response of the bearing under a typical excitation is acquired by numerical computation. Numerical examples indicate that the extended method has high computational precision and can correctly and effectively deal with the nonlinear dynamic analysis of the bridge bearing. The present work may provide a reference for further evaluation on the work efficiency and improvement of the bearing structural design.

关 键 词：桥梁支座 减震榫 准静态实验 改进的广义a法 非线性动力学 

分 类 号：TB123[理学—工程力学] U443.36[理学—力学]