智能隔震结构能量响应初步分析及控制效率评判

本文采用能量响应的观点揭示被动和智能隔震体系的减震机理,评判采用三种不同控制算法时智能隔震结构的控制效果。采用解析手段,导出了被动和智能隔震体系的累积能量平衡方程和结构瞬时能量传递的定性关系,揭示智能隔震在抑制结构能量响应方面的优势。在对能量传递取得定性认识的基础上,选用几个主要的能量响应指标,对被动隔震与智能隔震的能量响应进行分析,并对比采用三种不同控制算法的智能隔震结构能量响应规律。文末选用本文作者承担设计过的一个实际隔震工程作为算例,分别比较了输入两种不同地震波和两种不同地震强度水准时各种算法的控制效果。结果表明,本文作者建立的序列最优控制算法能更有效地抑制能量响应,再次显示了该算法综合性能优于现有两种结构最优控制算法。

A Preliminary Investigation to Energy Response of Smart Isolated Structures and Control Efficiency Evaluation

This paper presents a control mechanism of both passive and smart isolate structures and evaluation of control efficiency on 3 different optimal control algorithms base on energy response.Equilibrium equations of cumulative energy and qualitative momentary energy transferring relation in passive and smart isolated structures are derived by using analytic methods and the advantage of smart isolation is shown in terms of energy response suppressing.Base on the qualitative investigation of energy transmission,some primary energy responses are selected as performance indices.The energy response properties for passive and smart isolated systems are compared,and the efficiency for 3 different optimal control algorithms are evaluated.At the end of the paper,a real isolated building which was designed by the senior authors is employed as a numerical example to compare the control effects of different algorithms under two different earthquake waves and two different seismic intensities,respectively.The result shows that the control algorithm suggested by the author has the best efficiency for mitigating seismic energy response,which shows again that this algorithm is more advantageous over the other two existing control algorithms in terms of synthetic properties.