The Bending Performance And Reliablity Analysis Of Continuous Steel-concrete Composite Beam

Steel-concrete composite beam is connected with a will of steel beams and concreteplate are connected together into a whole load of a new beam with shear. Although thesteel-concrete composite beams at home and abroad have a more extensive research,however, there are still many problems in theory and actual application, along with thecontinuous steel-concrete composite beams further application, the effect of flexuralperformance will be the reliability of structure. Based on this, five groups of steel underdifferent parameters-concrete composite beam bending performance and reliabilityindicators are tested with the theoretical value comparative analysis.According to the experimental data of steel beam for Hourlong steel companycontinuous combination, the analysis model of3D finite element method isestablished,and the stress, strain, crack propagation of nonlinear numerical simulationanalysis is carried out, then the continuous composite cross in the load deflection curve ofbeams is obtained. As the calculation and analysis show that, the results of numericalanalysis and experimental data are consistent with the analysis model. And the model isreasonable and effective. Using this model, this paper discusses the influence ofcontinuous composite beams of the main parameters (including transverse reinforcementratio, strength of materials, web thickness). The results of the calculation show that theinfluence of continuous composite flexural capacity of the steel beams’ strength grade andthickness of the web is larger. The influence of shear strength and reinforcement ratio oncontinuous composite beams is smaller. The strength grade of concrete has some influenceon the bearing capacity of the continuous composite which resisting blending. But whenthe concrete strength reaches a certain level, its influence will be reduced.Related to the use of reliability theory, continuous steel-concrete composite beamflexural capacity of the main function for The main index of reliability related statistics onthe parameters of influence of continuous steel concrete composite beams (flexuralperformance of steel varieties, grades, material strength, reinforcement ratio, loadcombination) conducted sensitivity analysis. the results were higher than the standardspecification for the second time in the level of security for brittle failure criteria,providing theoretical basis for engineering design.