Study on seismic performance of steel plate-fiber reinforced concrete coupling beams
In order to enhance the seismic performance of reinforced concrete(RC)coupling beam with small span-to-depth ratio,a new type of steel plate-fiber reinforced concrete coupling beam is proposed in this paper.The low-cycle repeated loading test was carried out on the specimens of steel plate-concrete coupling beam and steel plate-fiber reinforced concrete coupling beam,and the failure process and hysteretic performance of the coupling beam were studied.The results show that during the loading process of the steel plate-concrete coupling beam,the main shear crack develops obviously,and finally the bending shear failure occurs.However,during the loading process of the steel plate-fiber reinforced concrete,the shear crack develops slower than the bending crack,and in the middle and late stages of loading,the shear crack basically stops developing,showing good deformation ability.Until the specimen fails,the steel plate-fiber reinforced concrete coupling beam specimen remains intact as a whole,and finally the failure dominated by bending control occurs.The addition of fiber reinforced concrete can effectively limit the crack width of concrete,maintain the integrity of specimens,and improve the failure mode of coupling beams to a certain extent.On this basis,the parameter analysis of steel plate-fiber reinforced concrete coupling beam is carried out by finite element software ABAQUS.The influence of span-depth ratio,steel plate ratio,fiber reinforced concrete compressive strength,longitudinal reinforcement and stirrup reinforcement ratio on the seismic performance of steel plate-fiber reinforced concrete coupling beam is studied,which provides a theoretical basis for the practical application of steel plate-fiber reinforced concrete coupling beam.
万方数据
维普
