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文章以中山市长江大桥(蝴蝶拱桥)为研究对象,运用ANSYS程序分别对考虑与不考虑桩-土相互作用的两种情况建立空间计算模型。根据场地土和规范确定设计反应谱和地震波,运用反应谱理论和动态时程理论进行地震反应分析,还对内外拱肋倾角变化的4种情况分别进行动力特性分析和时程分析,总结出倾角变化对结构抗震性能的影响规律。为同类结构的抗震设计提供参考。
Taking the Yangtze River Bridge in Zhongshan City (Butterfly Arch Bridge) as the research object, the paper uses ANSYS program to establish the space calculation model for two cases, which consider and do not consider the pile-soil interaction respectively. According to the site soil and the code, the design response spectrum and the seismic wave are determined. The response analysis and the dynamic time-history theory are used to analyze the seismic response. The dynamic characteristics and the time history analysis are also respectively conducted for the four situations of the internal and external arch rib inclination changes. Influence of Variations on Seismic Performance of Structures. It provides a reference for the seismic design of similar structure.