Numerical study on the failure mode of RC column subjected to lateral impact
LIU Fei1 LUO Qi-zhi 2 BO Yan 2 JIANG Zhi-gang2
1. College of Civil Engineering, Hunan University, Changsha Hunan 410082；
2. College of Basic Education, National University of Defense Technology, Changsha Hunan 410073
The dynamic responses of RC columns with axial loads subjected to lateral impact was simulated with nonlinear finite element method. The failure mode and its transition mechanisms, the influences of axial loads were investigated. The results showed that the shear failure process of RC columns can be divided into three stages, i.e., diagonal cracks development, transverse reinforcement yield and global failure. The deformation mode had gone through the local flexural deformation, the overall flexural deformation and the local shear deformation successively. RC columns which failed in flexure under static load would fail in shear under impact load, one of the important reasons was the different of strain rate between main reinforcement and transverse reinforcement, the strain rate of main reinforcement was greater than that of transverse reinforcement. RC columns tended to fail in flexure which was controlled by compressive strength of concrete with increase of axial load ratio.
刘飞1,2,罗旗帜1，严波2，蒋志刚2. RC柱侧向冲击破坏模式的数值模拟研究[J]. 振动与冲击, 2017, 36(16): 122-127.
LIU Fei1 LUO Qi-zhi 2 BO Yan 2 JIANG Zhi-gang2. Numerical study on the failure mode of RC column subjected to lateral impact. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(16): 122-127.
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