运梁车过桥对成桥阶段混凝土箱梁的结构影响

在黄冈大桥全桥合龙后，为加快南跨引桥预制 T 梁的施工进度，采取通过北侧梁板运输车过桥运梁支援南侧的 T 梁施工，以提高施工进度。通过有限元结构分析软件建立实体模型，对梁板运输车过桥不同的工况下关键截面的应力和变形进行分析，结果表明在最不利荷载作用下的关键截面产生的应力和变形满足结构的允许值，符合设计要求，验证了该方案的可行性。

Influence on Concrete Box Girder Bridge on Moving Transporting Beam Vehicle Passing Bridge in Finished Bridge Stage

After the closure of Huanggang Yangtze Bridge,in order to speed up the construction pro-gress of precast T-beam in the southern cross bridge,the measures of transporting precast T-beam from the north side with plate transport vehicle crossing bridge girder to support the south side T-beam construction are performed.Through the finite element analysis software,the physical model is established,and the stress and deformation of key section under different conditions on moving trans-porting beam vehicle passing the bridge is analyzed.Results show that the stress and deformation of critical section under the most unfavorable load meet the allowable value and the demand of design re-quirements,so the scheme is proved feasible.