Experimental Study On Shear Behavior Of Beam With Loompa High-strength Concrete And High-strength Steel

Along with “Code of design of concrete structure”(GB50010-2010)official implementation, high strength materials have a wide range ofapplication. The current standard of the shear capacity formula in our countrymostly based on the test data of the common material of concrete beams, thehigh strength materials whether or not can be applied, receiving more andmore attention. Especially there is little research on shear behavior of beamwith longitudinal reinforcement of500Map and concrete strength grade ofmore than C80, so it is necessary to be further perfected. Fully supported bythe subject "High-strength and high-performance concrete structureperformance study" which is supported to the "eleventh five-year plan" groupnational science and technology, fourteen high strength reinforced highstrength concrete beam are designed and produced for shear performance test.This article takes three as the research object.Based on experiments of three C100high-strength concrete andhigh-strength steel beams with different stirrup ratio, the development form ofthe crack and failure patterns of beam under the concentrated load areobserved. In this foundation, the stirrup ratio influence to the load of inclinedto crack; diagonal crack width and the shear capacity are discussed. Thetesting results indicate that the beam with C100high-strength concrete andhigh-strength steel can work well and its failure modes are similar to theordinary concrete beam. Improving stirrup ratio appropriately is an effectiveway to improve the bearing shear capacity and control the diagonal crackdevelopment of beam. According to the current Chinese code formula tocalculate the shear capacity is agreement with the test values.In addition, based on test related parameters, a comparison of the shearbearing capacity of the calculation formula of the safety stock, the influenceof stirrup ratio on the shear strength, the maximum and minimum stirrup ratioswas studied between Chinese code and American code.Finally, a nonlinear finite element model which is apply to high-strength concrete and high-strength steel beam established by ABAQUS, and thesimulation of the experimental beams of shear performance show that thesimulation value agreement with experimental results well by using thismodel.