【摘要】 详细介绍了芜湖长江大桥斜拉桥三维模型的建立和斜拉桥的模态分析，并在此基础上进行了斜拉桥的地震反应谱分析。分析结果表明，各阶振型频率的分布反映出了设计者的目的，并且当发生７度地震时，斜拉桥的安全性是可以得到保证的。更多还原

【Abstract】 In the paper, a 3-dimensional model for the cable-stayed bridge spanning on Yangtze River in Wuhu City is established. Based on it, a mode analysis and a seismic re- sponse spectrum analysis are carried out. All the results show that the distribution of mode frequencies reflects the designer’s idea and the safety of the bridge will be assured during earthquake of intensity 7更多还原