Study on seismic performance of railway gravity bridge piers with locally adopted PVA-ECC
In order to improve the seismic performance of bridge piers,the feasibility of using polyvinyl alcohol fiber rein-forced concrete(PVA-ECC)to improve the seismic performance of railway gravity bridge piers at the local bottom of bridge piers was explored.Two scale models of bridge piers with the reinforcement ratio of 1%were designed and produced,of which one pier model was made of 30 cm height PVA-ECC material locally at the bottom of bridge pier,and the other one ordinary concrete pier model was used as comparison model.Through the low-cycle reciprocating load test on the bridge pier models,the failure morphology of the piers were studied,and the seismic performance indicators such as hysteretic curve,skeleton curve,energy dissipation capacity,displacement ductility and stiffness degradation law of the pier models were analyzed and compared.The results show that the bearing capacity,energy dissipation capacity,stiffness and displacement ductility coeffi-cient of the bridge pier model are improved to a certain extent by using PVA-ECC materials locally at the bottom of bridge pier.The test results verify the feasibility of using PVA-ECC materials locally at the bottom of pier to improve the seismic performance of bridge pier.
NETL
NSTL
万方数据
维普
