三相邻结构的减震效果分析

Aseismic control effect analysis for three adjacent structures

提出对三个相邻结构间连接阻尼装置进行减震控制,推导了其单自由度简化模型随机响应计算公式,同时也给出了多自由度模型的阻尼、刚度等矩阵的构造方法并利用复模态法推导了其随机响应公式;最后对单自由度简化模型的三相邻结构各组合情况的减震效果分别进行了分析,并详细研究一般情况下的多自由度模型的三相邻结构减震效果。经仿真分析表明,三相邻结构控制后与两相邻结构控制所得结果基本相同;在两相邻结构对称而控制无效的情况下,三相邻结构仍可得到较好的控制效果;三相邻结构具有良好的鲁棒性,且对高阶响应峰值抑制明显。

Using damping devices connected among three adjacent structures to implement their aseismic control was proposed here. The random response formula was derived based on a single-DOF system simplified model for three adjacent structures. Further, a multi-DOF system model,s stiffness matrix and damping one construction method for three adjacent structures was presented and the multi-DOF system ’ s random response formulas were deduced based on the complex mode superposition method. Finally, the aseismic control effects of various combinations of the single-DOF system simplified model for three adjacent structures were analyzed, respectively and those of the multi-DOF system model for three adjacent structures were also studied in detail. The simulation results showed that after using connected damping devices, the aseismic control effects for three adjacent structures and those for two adjacent structures are almost the same; when the aseismic control is invalid due to two adjacent structures ’ symmetry, the aseismic control effects for three adjacent structures are still better; in addition, three adjacent structures have a good robustness and their higher-order response peaks are suppressed significantly under random earthquake excitation.