多柱式桥墩盖梁内力影响因素分析

Analysis of Influencing Factors on Internal Forces of Multi-column Pier Cap Beam

对于桥面宽度较大的市政桥梁,桥墩通常采用多柱式盖梁柱式墩,与双柱式墩相比,其超静定次数更多,因此温度、不均匀沉降等因素引起的结构次内力也会更大。主要分析结构自重、汽车荷载、整体升降温和不均匀沉降这几个因素对盖梁内力的影响。分析表明:多柱式桥墩盖梁计算时需考虑整体升降温和不均匀沉降的影响;盖梁设计时需设置合理的墩柱根数,减小盖梁内力。

For the municipal bridge of width larger,pier is usually multi-column,compared with double column pier,the number of statically indeterminate is more. Therefore,structural sub-internal forces caused by temperature,uneven settlement and other factors will be greater. This article mainly analyzes the influence of several factors such as the self-weight of the structure,the automobile load,the gentle rise and uneven settlement on the internal force of the capping beam. Analysis shows the multi-column pier cap beam calculation needs to consider the influence of the general elevation and the uneven settlement,beam design should be set reasonable pier number,to reduce the internal force of the cover beam.