Study On The Calculation Method Of The Transverse Distribution Of Load Of The Continuous Precast Fabricated Girder Bridge

Because of the advantages such as less precast beams,easier construction and structure security and reliability, the bridge construction has realized factorization, the standardization and the assembly.It has been more and more used in urban trestle and highway bridge.At present,the design of the continuous Precast Fabricated girder bridges is based on classical load transverse distribution calculation method of equivalent simple beam conversion rigidity law basic principle and the space finite element method , as a result,The first method has errors,because it has done larger simplifying to the section characteristic of the girders and the joint stiffness among the girders. The Second method has massive the computation work ,Its precision is greatly high.So it is significative and valuable to research and discuss structrure behavior and calculate method of the continuous Precast Fabricated girder bridges.In this paper,the transverse distribution of load of the continuous precast Fabricated girder bridges was main discussed.First of all,the continuous Precast Fabricated girder bridges have been distribution of load both at home and abroad has been introduced.secondly, Based on equivalent simple beam conversion rigidity law basic principle, The traditional revision rigid crossbeam principle,The hinged girder principle, The rigid connected girder were used to the calculate transverse distribution of load of the continuous Precast Fabricated girder bridges .Then according to the actual conditions,the entity's finite element model has been set up based on the space finite element method,and then the internal force have been calculated by contrasting and analysing each other,and then the cause of the error has been analysed.The suitability and the accuracy of the traditional load transverse distribution calculation method have been demonstrate.In this paper, Research results will be Provided to Engineers.The theory gist and the relevant compared datum are provided,for more research of the transverse distribution of load of the continuous Precast Fabricated girder bridges and choosing the most reasonable theory of the transverse distribution of load of the continuous Precast Fabricated girder bridges.