Study On The Key Issues Of Low Height Beam Bridge Of Plain Highway Control Point

In this paper,first of all,some common problems along the plain area of the highway in our country are described,and put forward the study of new routes. From the bridge floor on system and cover plate system to ascertain the structure pattern applying to the Low Height Beam,and analyse the structure and the size systemly and quantifily,and then study the bridge that hits the target with concrete structure and the combination of the overall structure of the work duty.Centering on the monographic study of the three types of representative plate-type load-bearing beam——The orthogonality opposite sex steel plate beam,Concrete frame beam and Turbid steel combination steel plate beam,introduce the analyses theory and calculated method,study architectural system dimensions and parameters for deck-molding,arrangement,stiffness, analyse bridge structure deck-molding controlling a characteristic,work out the technology route that the Low Height Beam studies,suggest the structure choice basic demands. Choose the beam that fitting with each other on structure and mechanics with fundamental call for in structure.And then analyse the height of the Low Height Beam,study and establish the mechanical conditions of the control of it.Solving high-beam control of the reference value,and then obtain the structure of system size and parameters.Article to the main line of separation of a bridge that crosses the overpass of Beijing-Kowloon Railway as the research object,make the numerical simulation,carry out different stages and conditions of the overall structure of static,dynamic,stability,node secondary stress,sum up the bridge-program design and analysis of the results of the calculation,it provides the technology that hold out to plain area express highway control point bridge design.