Comparative Study of Boundary Condition Effects on Hysteretic Characteristics of Columns in Cyclic Loading Test

Abstract:

Cyclic loading tests on structural members are carried out on different boundary conditions.The equivalence of the boundary condition is discussed by analyzing the results of 5 steel reinforced concrete(SRC) columns subject to cyclic loadings,which are respectively fixed at two ends or pin-restrained at two ends.A comparative study is made on the skeleton curves,key points and characteristics of hysteretic curves of specimens on different boundary conditions .Based on the numerical analysis of the mechanical model,the phenomena of test results are explained.The study shows that boundary condition has no evident effect on the ultimates and deformation capacity,however nonideal boundary restraint has certain influence on the initial stiffness,shape of the skeleton curve and energy dissipation capacity.