某缺失资料简支梁桥的安全评估

Safety Assessment Studies on a Simply Supported Beam Bridge with Missing Data

某些既有桥梁经常会出现资料缺失的情况,如何评估其通行能力往往困扰着桥梁管理部门。以某15m跨没有图纸资料的旧桥通行泥头车及平板车的安全评估为背景,首先介绍了从理论上计算该桥安全通行泥头车及平板车的荷载条件,然后介绍了从试验上对该桥梁通行泥头车及平板车进行安全评估的方法,并给出了评估结果。

A finite element model of a single tower cable-stayed bridge was established. An optimization of initial stay-cable force was conducted based on the force of steel box girder; initial stay-cable forces considered con- struction stages were also calculated in this paper. Stay-cable forces and stresses in each cable replacement con- dition were calculated. Extreme values and corresponding variation were analyzed. Stress of box girders and tow- ers were also calculated in order to determine whether limitation of traffic is necessary. At last, vertical displacements of box girder in each cable replacement condition were analyzed.