高低塔不对称斜拉桥横向受力数值分析

摘要:

高低塔不对称斜拉桥的横向受力是其结构分析的关键之一,对桥梁结构的安全性和耐久性有着重要意义。本文依托某高低塔不对称斜拉桥,分别建立了杆系模型和实体有限元模型对其横向受力进行了数值分析,研究了多个工况下结构的受力规律；对比两种模型的计算结果,分析表明活载作用下两种模型应力相差0.5～2MPa,人群荷载作用下基本一致,杆系模型较实体模型更为保守。

Abstract:

The lateral force of asymmetric cable-stayed bridge with high and low towers is one of the keys of its structural analysis, which is of great significance to the safety and durability of the bridge structure. In this paper, based on an asymmetric cable-stayed bridge with high and low towers, the bar model and solid finite element model are established respectively, the transverse force is numerically analyzed, and the force law of the structure under multiple working conditions is studied; Comparing the calculation results of the two models, the analysis shows that the stress difference between the two models under live load is 0.5 ~ 2MPa, which is basically the same under crowd load, and the bar model is more conservative than the solid model.