基于拟力法的桥梁结构地震响应分析  

Seismic response analysis of bridge structure based on force analogy method

作　　者：柳春光[1] 姚传国 柳英洲 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]辽宁工程技术大学建筑工程学院,辽宁阜新123000

出　　处：《世界地震工程》2015年第1期22-26,共5页World Earthquake Engineering

基　　金：国家自然科学基金项目(51178079);国家重点基础研究发展计划资助"973计划"项目(2011CB013605-4);国家自然基金重大研究计划项目(90915011;91315303);辽宁省优秀人才基金(2014020012)

摘　　要：基于拟力法的基本理论,结合桥梁结构非线性变形特点,提出了桥梁结构非线性分析的一种新方法。计算推导中,考虑了混凝土开裂引起的刚度变化不利影响。与以往变刚度有限元法相比,所提方法具有耗时少,所需存储空间小,效率高,稳定性好等特点。数值算例结果表明,拟力法与有限元法的地震动力响应结果吻合较好,且能确定构件中塑性铰分布及任意位置塑性转角的发展历程,证实了拟力法在连续桥梁结构应用中的准确性和有效性。In this paper, a new method that combines the force analogy method and the bridge structures deformation characteristics was presented to carry out inelastic dynamic analysis of bridge structures. During computational deduction, the unfavorable influence of stiffness change caused by concrete cracking was considered. Comparing with variable stiffness finite element method, the presented force analogy method has many advantages, such as less computation time and storage spaces, better efficiency and stability. A numerical example shows that the calculation results of both the force analogy method and the finite element method are consistent well, and the former may determine the distribution of plastic hinges of structural members and the development process of plastic rotation angle at any position, therefore it demonstrates the accuracy and efficiency of the force analogy method in the bridge structure.

关 键 词：拟力法 连续桥梁 塑性铰 地震响应 有限元法 

分 类 号：TU378[建筑科学—结构工程]