【摘要】 地震动的空间效应对大跨结构动力响应有很大影响。通过有限元软件ANSYS建立合肥新桥国际机场航站楼三种不同分区连接形式的计算模型,通过时程分析法计算三种模型在一致地震输入与多点地震输入下的响应,采用设计应力比等参数来比较三种模型响应的差别,最终得到三种方案的在多点地震输入下的响应差别以及产生差别的原因。结果表明,刚接模型对于多点地震输入更为敏感,但由于选用的比较参数不同,不能找出哪个方案最优,因此设计计算时应根据具体的结构形式进行分析,最终得到准确的分析结果。更多还原

【Abstract】 The effect of spatial variation of earthquake ground motion has great influences on the dynamic responses of large-span structures.In this paper,three different model of Hefei Xinqiao International Airport terminal has been established using the FEM software ANSYS.The time-history method is used in the seismic analysis of the different models under either the uniform excitation or the multiple excitations.Different responses have been compared by the parameter of the ratio of design stress κd and so on.Finally,the distinction and the reason have been received.The results indicate that the rigid model is more sensitive to the multi-support excitations.It is difficult to exactly find the best plan under all of the parameters,so we should design depend on the reality and get the exact result.更多还原