Inelastic Restoring Force Model and Parameter Identification Method for Reinforced Concrete Column
YU Bo 1 LI Chang-jin 1 WU Ran-li 1
1. Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, School of Civil Engineering & Architecture, Guangxi University, Nanning, 530004, China
The inelastic restoring force model and its parameter identification method for reinforced concrete (RC) column were developed by combining the differential evolution (DE) algorithm with the Bouc-Wen-Baber-Noori (BWBN) model, which takes into account the typical hysteretic behaviors such as strength degradation, stiffness deterioration and pinching effect. The influences of failure modes on the model parameters of inelastic restoring force of RC column were also discussed. The analysis results indicate the hysteretic behaviors of restoring force of RC column can be described rationally by the proposed inelastic restoring force model. The proposed method for the parameter identification of RC column is of rapid convergence speed, high accuracy and strong capability of global optimization. The failure mode has a significant effect on the model parameters of inelastic restoring force of RC column. The model parameters including strength degradation, stiffness deterioration, total slip of pinching and pinching slop increase gradually, when the failure mode changes from the flexure failure to flexure-shear failure and shear failure, which implies that the deteriorations and pinching effect of the shear critical column are more obvious than those of the flexure or flexure-shear critical column.
余 波1 李长晋1 吴然立1. 钢筋混凝土柱的非弹性恢复力模型与参数识别[J]. 振动与冲击, 2016, 35(21): 229-235.
YU Bo 1 LI Chang-jin 1 WU Ran-li 1. Inelastic Restoring Force Model and Parameter Identification Method for Reinforced Concrete Column. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(21): 229-235.
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