曲线上100m简支桁架桥梁设计研究

Research on Design of 100-m Simple-supported Truss Bridge on Curve

摘要:

以一座位于缓和曲线上的主孔100 m的简支钢桁架桥为例，分析了曲线上做桁架桥时的主要设计要点，具体阐述了曲桥直做时的构造处理方法，分析了简支桁架桥梁的纵向变形特征，提出了两种释放纵横梁轴向约束的具体设计方案，通过有限元分析了此类桥梁的主要静动力响应，可为同类桥梁工程的设计提供借鉴。

Abstract:

Taking a simple-supported truss bridge with the main span 100m located on the transition curve as an example, the main design essentials of truss bridge on the curve are analyzed. The structural processing method of the curved bridge in the straight construction is expounded in detail. The longitudinal deformation characteristics of simple-supported truss bridges are analyzed. Two specific design schemes of releasing the axial constraints of vertical and horizontal beams are proposed. The main static and dynamic responses of such bridges are analyzed by the finite element method, which can be referred for the design of the similar bridge projects.