预应力混凝土小箱梁腹板裂缝成因分析

Cause Analysis of Crack in Web of Prestressed Concrete Small Box Girder

为对预应力混凝土小箱梁腹板裂缝成因进行研究分析,论文以某预应力混凝土小箱梁为研究背景,采用有限元软件Midas对其进行建模分析。通过对该桥梁在运营期间的整体受力分析可知,桥梁受力处于安全稳定状态,即此时不会有裂缝出现。基于此,论文从预应力管道偏差的角度入手,设立了3种工况,对各种工况下桥梁的受力进行分析,以取得预应力管道偏差与裂缝之间的关系。

In order to study and analyze the causes of cracks in the webs of prestressed concrete small box girder,this paper takes a small prestressed concrete box girder as the research background and uses the finite element software Midas to model and analyze it.According to the analysis of the overall stress of the bridge during construction and operation,the stress of the bridge is in a safe and stable state,that is,there will be no cracks.Based on this,this paper sets up three working conditions from the perspective of prestressed pipe deviation,and analyzes the stress of the bridge under various working conditions,so as to obtain the relationship between prestressed pipe deviation and cracks.