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Study on Seismic Performance of Prefabricated Concrete Beam-column Joint

Wu Cong-xiao;Zhang Yu-feng;Zhang Chao;Deng Xue-song;Zhou Yun;School of Civil Engineering,Guangzhou University;Postdoctoral Research Station of Civil Engineering,Guangzhou University;  
Cyclic loading tests on the prefabricated reinforced concrete beam-column joint are carried out to investigate its seismic performance,and numerical simulation model based on finite element software ABAQUS is established and validated by comparing with experimental results. On this basis,nonlinear numerical analyses are conducted to make parametric study,which include the axial compression ratio,the concrete strength,the intensity of steel bar,the length of later pouring zone,etc. And the influences on stiffness,yield strength,ultimate bearing capacity of the specimen and energy dissipation are analyzed. The results indicate that the simulation results agree well with the test results. Besides,for different design parameters,the length of later pouring zone has great impact on the initial stiffness of the specimen,while the axial compression ratio and strength of concrete and steel bars don' t. The ultimate bearing capacity of the specimen reduces with the increase of axial compression ratio,but amplifies with the increase of length of later pouring zone. However,the increase of strength of concrete and steel bars has a very limited improvement of the ultimate bearing capacity of the specimen. Different design parameters,the intensity of steel bar and the length of later pouring zone have great impact on the energy dissipation of the specimen,while the strength of concrete doesn't.
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