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地震地面运动的空间效应对大跨结构的动力响应有很大的影响.通过有限元软件ANSYS建立了合肥新桥国际机场航站楼模型,采用ANSYS中的时程分析模块对结构进行多遇地震下多点输入和一致输入的时程分析.选择了合理的视波速来考虑行波效应的影响.将多点地震输入响应分析得到的设计应力与一致输入进行了比较.结果表明,多点输入下设计应力比一致输入下设计应力增大的构件占有很大的比例.因此,在大跨结构的设计过程中,多点输入下的地震分析是必不可少的.应该应用构件的设计应力比来调整一致输入地震响应的结果.
The spatial effect of earthquake ground motions has a great influence on the dynamic response of long-span structures.Through the finite element software ANSYS, the model of terminal building of Hefei Xinqiao International Airport is established, and the time-history analysis module Under multi-point input and consistent input.This paper chooses a reasonable apparent wave velocity to consider the effect of traveling wave effect.The design stress obtained by multi-point seismic input response analysis is compared with the consistent input.The results show that multi-point input Therefore, the seismic analysis under multi-point input is indispensable in the design of long-span structures.It is suggested that the design stress ratio To adjust the result of a consistent input of the seismic response.