新型混合式钢箱梁桥动力性能研究

Dynamic Performance Assessment of a Novel Hybrid Bridge System with Spread Steel Box Girders

基于Abaqus有限元模型计算分析,对一种采用混合分离式钢箱梁的新型桥梁体系的动力性能进行了评估。模型试验中主要计算分析不同车速、车重工况条件下分离式钢箱梁静、动挠度响应,用于评估桥梁动力性能,研究结果表明:(1)在移动荷载作用下,分离式钢箱梁横向协同受力良好,且在长期荷载作用下,钢箱梁整体性能稳定;(2)在不同车辆荷载加载情况下,各分离式钢箱梁冲击系数变化趋势相近且均在规范的范围内,整体受力情况良好。研究结果为跨平原湖泊地区新型混合梁桥的分离式钢箱设计提供了一定研究参考。

The dynamic performance of a new bridge system using a hybrid separated steel box girder was evaluated based on the Abaqus finite element model calculation and analysis.The model test mainly calculates and analyzes the static and dynamic deflection response of the separated steel box girder under different vehicle speeds and vehicle weight conditions,which is used to evaluate the dynamic performance of the bridge.(2)Under different vehicle loadings,the impact coefficients of each separated steel box girder have similar trends and are within the tolerance range of the code,and the overall stressing condition is good.The results of the study provide some research references for the design of new hybrid girder bridges across plains and lakes.