FEM ANALYSIS OF THE SEISMIC BEHAVIOR OF CSRC JOINTS WITH ADINA

Three core steel reinforced concrete (CSRC) joints were tested under cyclic loading to investigate the effect of truncation and embedded details of core steel in joint core to the seismic performance of the specimens. The FEM method used in this paper to simulate the CSRC joints with ADINA was introduced and three tested CSRC joints were simulated to verify the program. It was indicated that the calculated results, including the stress state of material, crack development of concrete and the skeleton curves of specimens, showed good agreement with test results. Based on the program verification, nonlinear finite element analysis of the joints with different anchor details of core steel, concrete strength and strength ratio of joint to beam were carried out. Parameter analysis indicated that the strength of specimens increased with the increase of strength ratio of joint to beam, while the deformation ability of specimens decreased. When the anchor area of core steel in joint core increased, the strength and deformation ability of specimens increased. This paper can provide references for the engineering practice of CSRC structures.