【摘要】 介绍了第三代结构控制的基准问题,通过研究地震激励高层建筑非线性反应的半主动控制,建立了高层建筑非线性地震反应的多步预测模型,模型中考虑了闭环控制系统中存在的时滞.基于非线性反应预测模型的Kalman Bucy状态估计器,采用磁流变阻尼器作为控制装置,提出了半主动模型预测控制策略,并对一个20层基准建筑进行了非线性反应的数值仿真分析.将振动仿真结果与其他控制策略的结果进行对比分析,结果表明,半主动模型预测控制是一种性能优良的控制策略,能有效地抑制高层建筑结构的非线性地震反应,减小强烈地震或罕遇地震对建筑结构的破坏.更多还原

【Abstract】 A third generation benchmark problem on structural control was presented, and the semi-active control of nonlinear seismic response of high-rise buildings was researched. A multi-step predictive model was built to estimate the seismic dynamics of high-rise building and the time delay in the control loop was taken into account. Based on the predictive model, a Kalman-Bucy observer was proposed to obtain the estimation of the state vector. A semi-active model predictive control strategy based on magnetorheological dampers was developed. Numerical simulation was carried out for analyzing the nonlinear seismic responses of the controlled 20-story benchmark building, and the simulation results were compared to those of the other control systems. The analysis results show that the developed semi-active strategy has good performance, and can reduce the nonlinear seismic response of high-rise building efficiently and minimize the damages in the building structures caused by strong earthquakes.更多还原