宽箱梁矮塔斜拉桥受力性能分析

Analysis on Stress Performance of Wide-box Beam Low-pylon Cable-stayed Bridge

以四川茜草长江大桥为工程背景,通过对宽箱梁矮塔斜拉桥施工过程的仿真分析,得出桥梁结构的全过程荷载响应,验证了桥梁结构的安全性。对宽箱梁的梁格分析表明,矮塔斜拉桥宽箱梁在不同阶段的横向分布系数是变化的,在设计、施工控制中要考虑横向分布系数对结构安全性的影响,并给出了部分结果。

Taking Changjiang River Bridge in Xicao of Sichuan as the engineering background,the article simulates and analyzes the construction process of the wide-box beam low-pylon cable-stayed bridge to give the whole process of loading response for the bridge structure and validate the security of bridge structure.The analysis of the beam grid of wide-box beam shows that the transverse distribution coefficient of wide-box beam of the low-pylon cable-stayed bridge is variable under the different stages.The influence of transverse distribution coefficient on the structure security should be considered during the design and construction control.The article gives some results.