变刚度半主动控制结构的拟振型分解法

First,the equivalent relationship between single-degree-of-freedom structures with active variable stiffness (AVS) systems and special linear structures is established,and the equivalent additional stiffness ratio and the equivalent additional damping ratio are determined.Then,an approximate mode decomposition (AMD) method is proposed for multi-degree-of-freedom (MDOF) structures with AVS systems.The accuracy of the method is discussed and improved using revising parameters.Simulation results indicate that the AMD method is effective in estimating the maximum relative displacements and the maximum interstory drifts of MDOF structures with AVS systems.The study provides a foundation for the seismic design method of structures with AVS systems.

基于全时程迭代的金属阻尼器减震结构地震响应分析方法研究

准确地估算等效阻尼系数和等效附加刚度对于附加金属阻尼器的减震结构的设计具有实用意义。首先基于等效线性化基本理论推导出等效阻尼系数和等效附加刚度计算公式,并引入全时程迭代的思想,形成一种附加金属阻尼器减震结构的地震响应分析方法。继而通过对3层剪切型结构的地震响应分析,探讨了该计算方法迭代过程的收敛性。最后,通过对3层剪切型结构和8层平面框架结构的地震响应分析,考察了该计算方法的计算精度和可靠性。与现有方法相比,提出的等效阻尼系数和等效附加刚度计算公式物理意义明确,同时考虑了金属阻尼器自身参数和结构动力响应对等效线性化参数的影响,采用的全时程迭代方法具有收敛速度快、计算精度高等优点。