不同车道荷载加载方式对空腹式拱桥的受力影响分析

Analysis of the influence of open-spandrel arch bridges under different lane loading modes

对于空腹式钢筋混凝土拱桥,车道荷载需在上部主梁上进行布载,通过排架立柱传递至主拱圈,直接在主拱圈上加载车道荷载会造成一定的误差。通过对拱桥进行车道荷载布载,计算出在不同的活载加载方式下主拱圈的内力响应,对比各个工况下主拱圈关键截面位置处的内力,分析直接在主拱圈进行车道荷载的加载方式是否适用,为工程设计提供一些依据。

For open-spandrel reinforced concrete arch bridges,the lane load should be distributed on the upper main girder and transmitted to the main arch ring through bent columns.Loading Lane load directly on the main arch ring will cause certain errors.This paper calculates the internal force response of the main arch ring under different lane loading modes by loading the arch bridge on the lane,and compares the internal force at the key section of the main arch ring under different working conditions.It also analyses of the applicability of loading Lane load directly on the main arch ring,which provides some basis for engineering design.