单索面斜拉桥模态参数测试与分析

Test and Analysis of Modal Parameters of a Single Plane Cable-stayed Bridge

根据某双塔单索面预应力混凝土斜拉桥结构受力特点,采用有限元软件对桥梁结构进行建模计算分析。基于现场模态试验,测试桥梁结构的模态参数,分析桥梁结构的动力特性,评价桥梁承载能力。结果表明,理论分析与实测模态参数分析的结果较为吻合,主桥整体刚度良好,结构传递振动能力及均质性较好。

According to the structural characteristics of a prestressed concrete cable-stayed bridge with double tower and single cable plane,the finite element software is used to calculate the bridge structure.Based on the field mode test,the modal parameters of bridge structure are tested,the dynamic characteristics of bridge structure are analyzed,and the bearing capacity of bridge is evaluated.The results show that the theoretical analysis is consistent with the analysis of modal parameters.The overall stiffness of the main bridge is high,and the vibration ability and homogeneity of the structure are good.