预应力对混凝土宽箱梁桥剪力滞的影响分析

Analysis of Impact from Prestress on Shear Lag from Wide Concrete Box Girder Bridge

目前对多室宽箱梁剪滞效应的研究尚少,其中更有必要研究预应力的影响。通过对一座典型的五跨预应力混凝土宽箱梁桥进行三维有限元分析,考虑了预应力束的空间作用效应,得出该类型宽箱梁桥在有无预应力作用下其剪力滞效应的比较,其结果可供同类工程参考。

Few studies are carried out at present on the shear lag effect of the wide box girder with multiple cavities. It is even more important to study the impact of prestress. Through the 3D finite element analysis of a typical five-span prestressed wide concrete box girder bridge, and consideration of the spatial effect of the tendons, a comparison of the shear lag effect is made of that type of bridge with and without being prestressed. The result can be used for reference.