Experimental Study On Shear Behavior Of Reinforced Concrete Beams Strengthened With High Ductile Concrete

High ductile concrete(HDC)is a kind of new structure material both strength and ductile deformation ability,especially it is able to with multiple fractures and strain hardening characteristics under tension together shear loads.HDC used as a reinforcing material,it can improve the brittleness of conventional concrete materials significantly,improve seismic performance and deformation of concrete structures.Therefore,when the concrete girder is insufficient in the actual engineering,the high ductile concrete is used for the reinforcement of the oblique section has obvious advantages such as convenient construction,saving material and low comprehensive cost,and has wide application prospect.The main contents of this paper are as follows.(1)In this paper,the pull-stripping bond behavior of HDC and the existing concrete is studied firstly,and by setting the working condition of five groups to consider different ways of processing interface for the influence of tensile strength,to analyze the bonding mechanism of various conditions.(3)Secondly,three kinds of failure mode form of a total of 13 different reinforcement scheme of reinforced beam without stirrups are designed,by the method of static load test,analyzing its failure process and failure mode,and comparing the shear capacity and deformation between the reinforced beams and the original beam.(3)Finally,analyzing the theory of the shear performance of the reinforced beam.Using simple superposition of form,through the modified compression field theory model,calculating separately the theoretical shear capacity of the original beam and the reinforced layer.By compared the results,the calculated values are in good agreement with the experiment.