Parameter identification and experimental verification of nonlinear principle model for pre-pressed spring self-centering energy dissipation braces
Fan Xiaowei1 Xu Longhe1 Li Zhongxian2
1. Beijing Jiaotong University, Beijing 100044, China;
2. Key Laboratory of Coast Civil Structure Safety of the Ministry of Education, Tianjin University, Tianjin 300072, China
Abstract：According to the mechanism of the pre-pressed spring self-centering energy dissipation (PS-SCED) brace, a new nonlinear principle model is proposed, which consists of two Bouc-Wen models and one linear elastic model. The calculation formulas for the proposed model are also presented. Based on the quasi-static test results of PS-SCED brace, seven dominant parameters of the proposed model are identified by the genetic algorithm. Comparisons of quasi-static tests, ANSYS solid element model and piecewise simplified model of the PS-SCED bracing system are conducted. Results indicate that the proposed model can accurately and detailedly describe the hysteretic behavior of the PS-SCED bracing system. Compared with the solid element model and the piecewise simplified model, the proposed principle model is more accurate in predicting the restoring force, stiffness transition, equivalent viscous damping ratio and cumulative energy dissipation.
樊晓伟 徐龙河 李忠献. 预压弹簧自恢复耗能支撑非线性原理模型参数识别及试验验证[J]. 土木工程学报, 2018, 51(7): 29-35.
Fan Xiaowei Xu Longhe Li Zhongxian. Parameter identification and experimental verification of nonlinear principle model for pre-pressed spring self-centering energy dissipation braces. 土木工程学报, 2018, 51(7): 29-35.
