Research On Load Transverse Distribution For Wide Prestressed Concrete T Beam Bridge

This article analysis the problem of wide prestressed concrete T-beam bridge load transverse distribution,which is based on the wide span T-beam bridge appearing in the work handover of the one section of the Chengdu-Chongqing high-speed double-track bridge.The stress space effect of wide prestressed concrete T-beam bridge structure is obvious.Compared to the generally narrow bridge,it has the distinctive characteristic and regularity on structural analysis and the load transverse distribution and calculation methods of the loads.Many scholars at home and abroad devoted themselves to the research for the load transverse distribution problem of the wide bridge and the beam bridge,so they also get a lot of mature theory.On the basis of the previous studies,this paper discusses the cross section load transverse distribution of wide T-beam bridge.(1)Understanding the current common calculation methods of the load transverse distribution from the theoretical principles,such as the lever principle method,the rigid beam method(Eccentric Compression method),the hinge plate(beam)method,the Rigid jointed beam method,the beam grillage method,the quasi orthotropic plate method(GM method),and the solid finite element method,mastering the characteristics and scope of application of each method in advance.(2)Calculating the coefficient of the load transverse distribution for the different wide prestressed concrete T-beam bridge by five kinds of calculation method.Summarizing the regularity of the wide prestressed concrete T-beam bridge load transverse distribution and figuring out the specific accuracy and range suitable for a variety of methods by comparing and analyzing the results.(3)Modeling and calculating by using solid finite element software Midas-FEA,and comparing calculation result of the T-beam bridge load transverse distribution of the simply supported continuous rotation system which is in the different size of the wide span,which will be helped to produce the load transverse distribution regularity of the T-beam bridge under the different architecture,and analyze the effects of structural changes in the system on wide T-beam bridge load transverse distribution.(4)Currently,while analyzing the bridge structure by modeling software,there are a variety of different ways to simulate the boundary conditions of the structure.In this paper,modeling T-beam bridge by Midas-FEA,and simulating boundary conditions by linear constraints and input pivot bearing stiffness constraints,which will be used to calculate the coefficient of the load transverse distribution.Analyzing comparatively the influence of different boundary conditions simulation on the load transverse distribution of different simply supported T-beam bridge and simply supported continuous rotation system.