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.
出处
《铁道标准设计》
2004年第9期65-67,共3页
Railway Standard Design
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
superposed beam cable-stayed bridge, open thin wall beam unit, natural vibration characteristic
