开口截面主梁斜拉桥的动力分析  

Dynamic Analysis of a Cable-stayed Bridge with Open Section Main Beam

作　　者：骆宁安[1] 

机构地区：[1]华南理工大学土木工程系,广东广州510640

出　　处：《铁道标准设计》2004年第9期65-67,共3页Railway Standard Design

摘　　要：考虑开口形式叠合梁主梁的截面翘曲变形影响 ,推导薄壁梁单元的刚度和质量矩阵 ,建立开口叠合梁主梁斜拉桥的空间动力分析模型。该模型可以有效地模拟桥面系的刚度和质量系统 ,且可以大大减少结构自由度和计算工作量。采用提出的薄壁主梁模型计算一座斜拉桥的动力特性 ,计算结果与实桥测试良好吻合 。Considering the impact of warping and deformation of the main beam of open type superposed beam, the rigidity and quality matrix of thin wall beam unit was deduced, and three dimensional dynamic analysis model was established. The model can effectively simulate the rigidity and quality system of bridge deck system, and can also greatly reduce freedom and calculation work. The model was used to calculate the dynamic characteristic of a cable-stayed bridge, and the result conformed to measured result, proving the correctness of the method and the model.

关 键 词：叠合梁斜拉桥 开口薄壁梁单元 自振特性 动力分析模型 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]