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该文在工字型钢铅组合耗能器试验的基础上,建立其滞回模型,并对安装耗能器的减震结构进行数值仿真,研究这种耗能器的滞回性能和减震效果。首先建立了耗能器的有限元分析模型,在有限元模型能够准确描述耗能器力学性能的前提下,利用均匀设计法对耗能器的主要几何参数进行设计,并进行数值回归计算,得到了耗能器的双线性滞回模型屈服强度、弹性刚度、强化刚度等力学性能与几何参数之间的关系。建议的滞回模型形式简单,便于工程应用,且与试验结果接近,表明模型参数公式合理;最后,建立钢铅组合耗能器减震体系的仿真模型,进行地震反应分析,结果表明:钢铅组合耗能器有良好的减震控制效果。
Based on the I-shaped steel-lead combination energy dissipater test, the hysteresis model is established and the damping structure of the installed energy dissipater is numerically simulated to study the hysteretic performance and damping effect of the energy dissipater . Firstly, the finite element model of the energy dissipater is established. Under the condition that the finite element model can accurately describe the mechanical performance of the energy dissipater, the main geometric parameters of the energy dissipater are designed by the uniform design method and the numerical regression calculation is performed. The relationship between the mechanical properties such as yield strength, elastic stiffness, stiffening stiffness and geometric parameters of the bilinear hysteresis model of the energy dissipater is discussed. The proposed hysteretic model is simple in form and easy to be applied in engineering. It is close to the experimental result, which shows that the formula of the model parameter is reasonable. Finally, the simulation model of the shock absorber system of the steel-lead combined energy dissipater is established and the seismic response analysis is carried out. The combination of energy-saving damping control effect.