Abstract

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Title:: Research on Seismic Performance of High-strength Concrete Flat Columns with Diagonal Reinforcements

Author(s):: LEI Tuo; LIU Bo-quan; QIAN Jiang; HUANG Hua; TIAN Qing-biao; School of Civil Engineering, Chang’an University

Keywords:: diagonal reinforcement; high-strength concrete; flat column; high-rise building; seismic performance; hysteresis analysis; finite element

Abstract:: In order to study the seismic performance of flat columns on skew girder joint in transfer story of a high-rise building, three low reversed cyclic loading tests on 1∶4 high-strength concrete flat columns were conducted. The failure pattern, hysteresis curve, ultimate bearing capacity and ductility were analyzed. Based on the experiment, the finite element analysis software ABAQUS was used to analyze the specimens. The establishment of the finite element model, definition of the material parameter and the influences of diagonal reinforcements were discussed in detail. The results show that the ultimate bearing capacity of specimens will be higher with vertical force increasing while the ductility will be decreasing, the load-displacement hysteretic curves are in plump-shape, and the flat columns have excellent seismic behavior. In condition of reasonable parameters, ABAQUS concrete damage plasticity model can be well used for hysteretic analysis of reinforced concrete members. Diagonal reinforcements can improve ultimate bearing capacity of specimens, but have no significant effect on the ductility.