地震作用下高层建筑重叠分散控制子结构划分机理研究

摘要

针对地震作用下高层建筑振动分散控制问题,引入信息共享的重叠分散策略,研究高层建筑振动重叠分散控制子结构划分机理.基于线型二次型(LQR)最优控制的最优权矩阵和H∞鲁棒控制的最优输出评价矩阵,分析评价高层建筑重叠分散控制子结构不同划分策略时的控制效果.对某20层Benchmark结构模型进行数值模拟与分析,结果表明,本文提出的两种重叠分散控制方法的性能评价方法,可指导任意层数高层建筑振动重叠分散控制子结构的合理划分,既保证控制系统良好的控制效果,又保证控制力在合理的范围内.%The paper focuses on the decentralized control of vibration of tall buildings under earthquakes and studies the substructure division tactics of tall buildings by introducing information-sharing overlapping decentralized control strategy.Based on optimal weight matrix of Linear Quadratic Regulator Optimal Control(LQR)and optimal output evaluation matrix of H∞ robust control,the paper furthermore analyzes and evaluates the control effect on tall buildings with different substructure divisions.A typical 20-floor seismically excited building is used to analyze the performance of the control strategy.The results indicate that the two overlapping decentralized control tragedies proposed here can guide the substructure division of tall buildings under overlapping decentralized control.The strategies can guarantee a satisfactory control effect and keep the control force within a reasonable range.