焦枝复线洛阳黄河大桥横向刚度分析

Lateral Rigidity Analysis of Luoyang′s Huanghe Bridge on Jiao-Zhi Multiple Track

提出预应力混凝土双T梁的横向振动分析模型 ,根据势能驻值原理及形成结构矩阵的“对号入座”法则 ,推导列车—桥梁时变系统的总体质量、阻尼和刚度矩阵 ,以车辆构架在桥上的实测蛇行波和车辆轮对在线路上的实测蛇行波为激振源 ,分析计算焦枝复线黄河大桥的车桥系统横向振动响应 ,评价该桥具备的横向刚度。

The paper brought forward the lateral vibration analysis model of prestressed concrete bridge with double-T section. Basing upon variation principle the stationary potential energy and the 'set-in-right position' rule, it deduces total mass matrix, damping matrix and rigidity matrix of the train-bridge considered as a whole vibrating system. Meanwhile it takes the hunting curves of the under-frames on the bridge and the wheel-sets on track as the excitation sources, calculates the lateral vibration responses of train-bridge system of Huanghe great bridge and estimates its lateral rigidity.