Experimental Research And Theoretical Analysis On Bending And Shear Bearing Capacities Of Steel Reinforced Concrete Composite Beams

Compared with reinforced concrete structure,composite beams structure has characteristics of high bearing capacity and good ductility,so has been applied in engineering widely.In this dissertation,one new model of composite——Steel reinforced concrete composite beams was proposed,it has been applied in a reinforced structure with an H rolled frame work structure beam to form an original concrete beam of composite beam .In this dissertation ,from four simple supported steel reinforced concrete composite beams static loading test ,the research system was focussed on the behavior of steel reinforced concrete composite structure.The main research works and results include:(1) Four steel reinforced concrete composite beams models were designed and fabricated, furthermore with specimen to carry on and focus static loading.According to experimentation datas,obtained load-deflection curves,situation of strain section expansion experimentation results,study other special works and failure caracteristics.(2) An experimental investigation to study bending capacity of steel reinforced concrete composite beams ,shear bearing capacity ,and compare with the original concrete beam bearing capacity ,illustrated how good is the result of steel reinforced concrete composite beams strengthening。(3) For Strength analysis of Steel reinforced concrete composite beams in combined bending and shear, to calculate bending and shear formulas of composite section under combined bending and shear.The results show the strong deformation ability of Steel reinforced concrete composite beams ,good ductility,high energy dissipation and bearing capacity;from the analysis of the results of steel reinforced concrete composite beams in combined bending and shear proposed a consideration about the strength contribution of concrete structure ,also considere the ultimate bending shear of the design model mutual action .This model provided a reliable and economic steel-concrete composite beam design method .As a result this possessed an important meaning theory and structure value。...