双层钢桁架梁桥静力与动力特性分析研究

Analysis and Study on Static and Dynamic Characteristics of Double-layer Steel Truss Girder Bridge

摘要:

青浦大道主桥为双层钢桁架连续梁桥，上层桥梁跨径组合为（67+86+67）m=220 m，桥宽为24.6 m；下层桥梁跨径组合为（61+86+61）m=208 m，桥宽为35.75 m。以该桥为研究背景，介绍了该桥梁总体设计方案，建立了有限元数值模型进行计算，对其静力特性、自振特性、人行舒适性进行分析。结果表明，钢桁架结构受力可满足规范要求，结构设计合理。其研究过程及结果可供其他工程项目同类桥型参考。

Abstract:

The main bridge of Qingpu Avenue is a double-layer steel truss continuous beam bridge. The span of the upper bridge is (67+86+67) m=220 m and the bridge width is 24.6 m. The lower bridge span is (61+86+61) m=202 m and he bridge width is 35.75 m. Taking this bridge as the research background, the overall design scheme of the bridge is introduced, and a finite element numerical model is established to analyze the static characteristics, natural vibration characteristics and pedestrian comfort. The results show that the structural stress of steel truss can meet the requirements of the code and the structure design is reasonable. The research and process and result can be used as reference for the similar bridges in other projects.