The Research On Mechanical Behavior Of Continuous Steel-concrete Composite Beam And Reasonable Section

Structure steel-concrete composite beam structure to consider the respective advantagesof steel tensile and compressive properties of concrete materials, fittings and combines theminto a unified whole and work together, and give full play to their respective advantages. Thecarrying capacity of the conditions, not only to meet the structural needs is still time and theeconomy can achieve a certain amount of revenue. Steel-concrete composite beams inhigh-rise building and bridge applications, large span a wide range, especially in large urbanareas such as cross overpass, achieved results, and further develop and promote thesignificance. Composite beams focused on the building structure in the field of watertransport engineering, especially in the more and more development to the large span pierstructure almost no applications, procedures and norms. Therefore, the composite beamstructure in the application feasibility of the pier large span structure to do some research.Summarizes the domestic and international development of the steel and concretecomposite beam structure, the main application of research; steel-concrete composite beamsbasic principles: the type and structure of the steel-concrete composite beams, steel-concretecomposite beam works, the force The performance analysis of composite beams slip effect,the cross-section of the composite beam analysis and internal force analysis;12m spansteel-concrete composite beam model, its stress-strain problem, including the transversenormal stress to the bearing capacity and stable nature of some of the problems andcalculations discussed using ANSYS model stress strain calculated comparative analysis;comparative analysis of continuous composite beam cross-section characteristics, thecombination affect the size of the beam part of its stress-strain comparison, combined withthe practical with the requirements of the economy, make optimization recommendations forcomposite beams, calculated to analyze the reasonableness of the design moment resistancemoment of the positive and negative moment area.The main conclusions: composite beams under concentrated loads transverse normalstress less affected; affect the strength of the order: the thickness of the concrete slab, web height and thickness of the flange of the steel beam up and down according to the stress anddeflection of continuous composite beams, web thickness of the composite beam crosssection cross-section discussion, to make it more economical steel, and the stability of thecomposite beam improvement; composite beams in large-span structure, stability issuesshould be considered, the design can be used, such as the steel box girder like the morestability the composite beam; The conclusion that basis on the strong influence to weakinfluence of beam’s stress and deflection the parameters are concretes fringe plate thickness,web plate height, steel fringe plate thickness, thickness the web plate thickness had beenachieved, bearing capacity in higher regard than Composite Beams wharf structure should bemore suitable for a continuous beam.