三类结构抗震控制措施控制效果的比较与分析

本文对结构抗震控制的主动控制、被动控制和半主动控制等三类控制措施的控制效果进行了比较与分析。文中以瞬时最优控制算法为基础 ,推导了分别安装有三类结构抗震控制措施的结构的运动方程 ,得到了三类结构抗震控制措施在时域内的控制算法和控制律 ,并依据等效最优控制算法对不同控制参数进行了优化设计。通过对一受El Centro波激励的 36层高层建筑结构实施三类抗震控制的数值仿真分析 ,比较了三类结构抗震控制措施的控制效果 ,结果表明主动控制效果最好 ,半主动控制效果次之 ,而被动控制效果最差 ;半主动控制的控制效果虽比主动控制差一些 ,但其不需外界能源 ,控制可靠性高 ,易于在工程中实现。由此可得出结论 ,半主动控制极具发展前途 ,可在工程中推广应用

Comparison and Analysis on Control Effects of Three Kinds of Measures for Structural Seismic Control

In this paper, the control effects of three kinds of measures, including active, passive and semi-active control, for structural seismic control are compared and analyzed. Based on the instantaneous optimum control algorithm, the equations of motion of the structures, installed the three kinds of measures for structural seismic control respectively, are derived, their control algorithms and control laws in time domain are obtained, and the different control parameters are designed according to the equivalent optimum control algorithm. Through the numerical simulation of the three kinds of seismic control for a 36-story building subjected to El-Centro earthquake, the control effects of the three kinds of measures for structural seismic control are compared. The results show that the control effect of active control is the best, and the semi-active control is the second, but the passive control is the worst. By comparison of the semi-active MR control with the active control, the control effect of semi-active control is poor to that of active control, but the semi-active control does not need the external energy and has high reliability of control, and is easy to be realized in actual engineering. Finally, a conclusion is given that the semi-active control has boundless prospects, application and dissemination.