空心板梁桥铰缝破坏机理精细化有限元分析

空心板梁桥在我国中小跨径桥梁中是一种得到广泛应用的桥梁形式,铰缝病害普遍出现在空心板梁桥的运营过程中,为了更好地对空心板梁桥进行养护加固,需要透彻研究铰缝的破坏机理。首先介绍了我国现行空心板梁桥的设计方法,然后利用ANSYS大型有限元分析软件建立精细化有限元模型对比铰接板法分析横向分布差异,最后研究空心板铰缝的横向正应力和纵向正应力应力分布情况,得出铰缝的实际受力状态,病害产生的原因,对今后的空心板梁桥的实际养护加固具有工程指导意义。

Refined Finite Element Analysis on Failure Mechanism of Hinge Joint in Hollow Slab Girder Bridge

Hollow slab Girder Bridge is a widely used bridge form in medium and small span bridges in China.Hinge joints are common in the operation of hollow slab girder bridges.In order to better maintain and reinforce hollow slab girder bridges,it is necessary to thoroughly study the failure mechanism of hinge joints.Firstly,this paper introduces the design method of hollow slab Girder Bridge in our country,then uses ANSYS large-scale finite element analysis software to establish solid model to compare the difference of transverse distribution of articulated slab.Finally,it studies the distribution of transverse normal stress and longitudinal normal stress of articulated joints of hollow slab,obtains the actual stress state of articulated joints,causes of diseases,and for future hollow slab girder bridges.The actual maintenance and reinforcement has engineering guiding significance.