The Application Of The Steel Composite Beam In The Continuous Girder Bridges

Steel-concrete composite beam is a new structure on the basis of steel and reinforced concrete structures under study.The steel beams and concrete slab with a connecting member were integrally connected so that the two work together,not only having a good performance and structural properties,but also having good economic benefits.On the one hand,the continuous research work of steel-concrete composite beam girder is,for the steel concrete composite beam cross-sectional design in order to get a more reasonable and more optimized composite section;on the other hand,the tensile stress for composite beams focused on the pier top position,so that the negative moment zone pier top flex Strength is low,which need to study steel concrete composite beam construction technology to reduce the negative moment pier top tensile stress;In composite beam shear connector main role is to withstand longitudinal shear forces between steel beams and reinforced concrete wing off effects and resistance between the steel beam and wing.Through the research and application in the 1950 s and 1960 s,the connecting member is also a great form of development,and played a very important role in practical work,but there is not complete data sheet on the stiffness in the construction process of the bridge structure connecting member of the force and work performance effect.This paper relies on a continuous steel-concrete composite beam bridge girder(HZMB shallow non-navigable bridge)engineering background using Midas / Civil finite element analysis software,using static analysis methods HZMB shall-ow non-navigable bridge of the stress and displacement analysis.And the use of FEA finite element simulation of solid elements modeling of steel-concrete composite beam shear connector nonlinear characteristics were calculated analysis,the effect of slip stiffness analysis and connections to Lift Effect.In summary,this study method combining theoretical research,experimental research and finite element analysis of the study are as follows:(1)Continuous Composite Beam theory of computation,analysis of their theoretical knowledge in the design and construction of steel-concrete continuous composite beam summary paper proposes pier top negative moment and the rigidity of the connector.(2)Use the finite element method,steel beams to build the pier from the top modelof analysis,research pier on steel beams from the top of the effect of negative moment area of tensile stress.(3)Combine HZMB shallow non-navigable bridge construction steel concrete composite beams,steel-concrete composite beam monitoring during construction steel main beam in the roof and floor after lifting stress and composite beams down at the bridge pier top panel produced pressure.(4)Perform for connections nonlinear characteristics finite element method analysis,one slip characteristics of the bridge structure analysis;analysis of the impact on the other hand the connecting member stiffness changes in the size of the lifting effect.