Modeling And Shear Stress Transfe Mechanism Of Hinge Joints On The Prestressed Concrete Hollow Slab Bridge

In this paper,a finite element analysis is carried out for the first stage of the Xinxiang Highway Widening Project in some section of Henan provincial.By taking into account the nonlinear material and the nonlinear contact between the cross section,the influence of the stress and strain between the hinge joint and the hollow slab bridge are investigated.When the concentrated load is applied to the hollow slab girder,the hinge joints on the two sides of the load beam are the largest and the others are less stressed.While the hinge joints are mainly concentrated in the corresponding position of the load,the other positions are small.Secondly,through the design of the hinge joints in the middle of the beam in order to test,it is a kind of hollow slab hinge bearing capacity test pieces.The failure mode,crack load,crack width,crack opening and other failure modes are studied.In order to explore the stress condition,the limit loadzand and the failure mechanism of hinge joints,the test is carried out.At the same time,the finite element software ABAQUS is used to analyze the nonlinear behavior of the test members and study the size effect of the test,which the stress range of the hinge joint and the mechanism of the shear transfer distribution are obtained.The main conclusions are as follows: under uniformly distributed load,the transfer of hinge joints is elliptical distribution.the longitudinal and transverse length of the action area is five and three times of the width of the hollow slab.In the process of test,it is an effective measure to control the joint failure and to improve the lateral stiffness of hinge plate by increasing the depth of hinge joint.The main reason for the failure is that the anchorage length is not enough.The two most important factors for the failure of hinged joints are the transverse tensile stress and the vertical shear stress.