桩柱式桥墩盖梁悬臂倒角对盖梁的影响

Influence of cantilever chamfering angle of pile-type bridge pier cover beam on cover bneam

随着桥梁设计理论和施工水平的提高,桩柱式桥墩在公路桥梁设计中占有很大的比例,对于装配式上部结构,其与下部结构的连接通常采用盖梁,上部结构自重及其上承受的荷载通过盖梁传递到下部并最终到基础。公路盖梁受力特点随着桥宽、桥跨和斜交角度的变化而变化。当前国内盖梁设计随意性偏多且配筋偏大,不同的设计单位之间采用的盖梁尺寸也差距较大,尤其在盖梁悬臂倒角尺寸的选择上。本文着重从桩柱式桥墩盖梁悬臂倒角设置的角度探讨对盖梁受力的影响。

With the improvement of bridge design theory and construction level,pile-type bridge pier occupies a large proportion in highway bridge design.For the prefabricated superstructure,the connection with the substructure is usually made by cap beam.The dead weight of the superstructure and the load borne on it are transferred to the lower part through the cap beam and finally to the foundation.The stress characteristics of the highway girder vary with the width,span and Angle of the bridge.At present,the design of cap beam in China is more arbitrary and the reinforcement is larger,and the size of cap beam adopted by different design units is also different,especially in the selection of cantilever chamfering size of cap beam.In this paper,the influence of the cantilever chamfering Angle setting on the pile-type pier cover beam on the force of the cover beam is discussed.