单层连续梁桥多点地震输入拟动力实验研究
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摘要
多维多点地震输入作用下,各支承点相对运动引起的拟静力反应对结构的影响目前尚无一般结论,多数情况下破坏状态可能更严重。另一方面,拟动力实验可以灵活、经济地实现多点输入动力实验,同时具有较好模拟精度,相比振动台台阵具有一定优势。因此考虑多维多点输入并研究相应拟动力实验控制有着明显的实际意义。文中推导了二维多点地震输入情况下单层连续梁桥的动力方程,引入OS(Operator Splitting)数值算法和子结构实验方法,并基于VC语言开发了二维多点拟动力实验控制软件TUTmulti。
There is still no universal conclusion about the effects of the structure reaction forces under multi-support seismic excitation,and in most circumstances the reaction forces tend to lead more severe damage.In addition,the pseudo-dynamic test is more flexible and economical test method compared with the shaking table test under multi excitation,while good accuracy can be obtained.Therefore,it is necessary to study the pseudo-dynamic test under the multi excitation and the relevant test control.In this paper,the dynamic formulas of single continuous bridge under multi excitation are derived,and the OS(Operator Splitting)integration method and sub-structural test are adopted in the formulas,a test control program named TUTmulti is developed by using Visual C++ language.
There is still no universal conclusion about the effects of the structure reaction forces under multi-support seismic excitation,and in most circumstances the reaction forces tend to lead more severe damage.In addition,the pseudo-dynamic test is more flexible and economical test method compared with the shaking table test under multi excitation,while good accuracy can be obtained.Therefore,it is necessary to study the pseudo-dynamic test under the multi excitation and the relevant test control.In this paper,the dynamic formulas of single continuous bridge under multi excitation are derived,and the OS(Operator Splitting)integration method and sub-structural test are adopted in the formulas,a test control program named TUTmulti is developed by using Visual C++ language.
引文
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[2]Edward L Wilson.Static and Dynamic Analysis of Structures[M].Computers and Structures,Inc,2006
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[2]Edward L Wilson.Static and Dynamic Analysis of Structures[M].Computers and Structures,Inc,2006
[3]刘枫,肖从真,等.首都机场3号航站楼多维多点输入时程地震反应分析[J].建筑结构学报,2006,27(5):56～63Liu Feng,Xiao Cong-zhe,etc.Time-history analysis of terminal3of the Capital Airport under multi-support and multi-dimension seismic excitation[J].Journal of Building Structures,2006,27(5):56～63(in Chinese)
[4]潘鹏.结构地震反应多媒体仿真系统研究与开发[D].北京:清华大学土木系,2001Pan Peng.Research&Development on Multimedia Simulation System for Structural Seismic Response[D].Beijing:Civil Department of Tsinghua University,2001(in Chinese)
[5]Nakashima M,Kaminosomo T.Integration techniques for substructuring pseudodynamic test[A].The Fourth US National Conference on Earthquake Engineering,Vol.2,1990
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