矮塔非对称斜拉桥的稳定性研究

Research on Stability of Short Tower Asymmetric Cable-stayed Bridge

以矮塔非对称斜拉桥津保铁路子牙河特大桥为工程背景,用软件Midas/Civil对该桥进行有限元建模,在分析各工况安全稳定系数及相应失稳模态后,得出该桥在成桥运营阶段的整体稳定性良好,且各构件中桥墩稳定性最好、塔的稳定性又高于梁的稳定性的结论.

With the project background of Ziyahe river grand bridge： a short tower asymmetric cable-stayed bridge spanning Tianjin-Baoding railway, this paper adopts the large finite-element-analysis common software Midas/Civil to build the cable-stayed bridge finite element model. On the analysis of working conditions＇ stability factors of safety and corresponding instability modes, we come to the conclusion that the overall stability of this bridge during its operational phase is good, and of all the components the bridge pier has the highest stability, and the stability of the tower is higher than the beams.