Steel - Concrete Composite Beam Stud Connectors Recovery Model Tests And Theoretical Analysis

At present, the stud has been widely used in the construction of buildings and bridges in China, a nation with high activity and high-frequency of earthquakes. So the research of antiseismic behavior of stud connectors is of great significance.In this paper,the method of experiment study and the theoretical analysis is used to research the push-out specimen of stud connectors under repeated load.The main contents are as follows.(1) Based on the summary research results in the past,applying theory such as mechanics,RC structure nonlinear and so on,this paper propose the stud connector experimental plan,and carries on 16 push-out specimen model under repeated loading action.(2) According to the experimental phenomenon and the theoretical analysis,the following seismic behavior characters of the specimen have been analyzed:bearing capacity,ductility,hysteresis capacity,energy dissipation and failure phenomena.(3) In order to carry on the earthquake resistance analysis,it needs to be modeling the hysteresis curve which obtain from the laboratory data,enables it more ideally to respond the stud the displacement-load relations under the repeated loading,and considers the strength and the stiffness degenerated rule,according to the tentative data and regression analysis,this paper proposes the stud connector skeleton curve and the resiliency model.(4) By means of the finite element nonlinear analysis of the push-out specimen betwween finite element nonlinear analysis results and experimental results,the FEA results are proved rational and corrective simulaneously.And this paper analysis the horizontal reinforcement ratio and the stud pitch,and its effect on bearing capacity and ductility of the stud connector.