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工程科学与技术:2020,52(3):70-77
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基于主动控制优化被动黏滞阻尼器及混合隔震研究
(1.广州大学 工程抗震研究中心, 广东 广州 510405;2.广州大学 工程抗震减震与结构安全教育部重点实验室, 广东 广州 510405)
Study on Optimization of Passive Viscous Damper and Passive Hybrid Control Seismic Response
(1.Earthquake Eng. Research & Test Center, Guangzhou Univ., Guangzhou 510405, China;2.Key Lab. of Earthquake Resistance, Earthquake Mitigation and Structure Safety, Guangzhou Univ., Guangzhou 510405, China)
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投稿时间:2019-11-20    修订日期:2020-02-03
中文摘要: 针对隔震结构在超防烈度下隔震层位移响应过大问题,提出了基于主动控制算法优化被动黏滞阻尼器的策略。并将被动黏滞阻尼器安装于基础隔震结构形成被动混合控制结构,采用此被动混合控制能够基本实现主动混合控制的控制效果,实现以更加经济简便的方式解决隔震结构在超防烈度下隔震层位移响应过大问题。首先,将主动控制装置设置于隔震层形成主动混合隔震控制体系,采用主动控制算法获取隔震层主动控制力与速度特性;其次,利用主动控制力与速度关系曲线,通过最小二乘法拟合被动黏滞阻尼器的最优阻尼系数与速度指数,最后将设计出的被动黏滞阻尼器安装于隔震层,形成被动混合隔震控制体系。以1栋7层基础隔震结构为受控模型,通过对主动混合隔震控制体系与被动混合隔震控制体系的仿真分析可知:主动混合隔震控制对隔震层位移的减震率分别为39.41%、45.04%及55.54%;被动混合隔震控制对隔震层位移的减震率分别为36.40%、44.30%及52.51%。被动混合隔震控制对于隔震层位移的减震率能够达到主动混合隔震控制效果的90%以上,被动混合隔震控制对于隔震层加速度响应的减震率能够达到主动混合隔震控制的60%以上,被动混合控制也同样实现了减小隔震层地震响应的同时不增加上部结构的响应。依据主动控制算法设计的被动黏滞阻尼器形成的被动混合控制结构能够基本实现主动控制的效果,说明依据主动控制设计被动黏滞阻尼器实现主动控制效果的思想的可行性。
Abstract:In order to solve the problem that the displacement response of isolation layer is too large in the case of the isolated structure under the super intensity, the strategy of optimizing the passive viscous damper based on the active control algorithm was proposed. The passive viscous damper was installed in the foundation isolation structure to form the passive hybrid control structure, and the passive hybrid control basically achieved the control effect of active hybrid control, so as to solve the problem that the displacement response of isolation layer was too large under the super intensity. First set the active control device in the isolation layer to form active hybrid vibration isolation control system, the active control method for isolation layer of active control and speed characteristic, secondly, using the active control force and velocity curve, fitting by the least squares method of passive viscous dampers optimal damping coefficient and the speed index, finally designing a passive viscous dampers installed in isolation layer, forming a passive hybrid vibration isolation control system. Taking a seven-story foundation isolation structure as the controlled model, and conducting the simulation analysis of the active hybrid isolation control system and the passive hybrid isolation control system, it could be seen that the active hybrid isolation control could reduce the displacement of the isolation layer by 39.41%, 45.04% and 55.54%, respectively. The shock absorption rates of passive hybrid isolation control on the displacement of isolation layer were 36.40%, 44.30% and 52.51%, respectively. Passive hybrid vibration isolation control for displacement of isolation layer damping rate could reach more than 90% of the active hybrid vibration isolation control effect, passive hybrid vibration isolation control for the acceleration response of the isolation layer damping rate could reach more than 60% of the active hybrid vibration isolation control, passive hybrid control was also achieved at the same time reduce the earthquake response of the isolation layer not to increase the response of the upper structure, based on the active control algorithm design of passive viscous damper passive hybrid control structures basically achieved the effect of the active control. The feasibility of designing passive viscous damper based on active control was illustrated.
文章编号:201901126     中图分类号:TU352.1    文献标志码:
基金项目:国家自然科学基金项目(51778163);广州市属高校科研项目(1201620162);广东省高校创新团队项目(2016KCXTD016)
作者简介:张冠平(1991-),男,博士生.研究方向:结构工程隔震、减震以及抗震.E-mail:zhangguanping@e.gzhu.edu.cn
引用文本:
张冠平,刘彦辉,谭平,金建敏.基于主动控制优化被动黏滞阻尼器及混合隔震研究[J].工程科学与技术,2020,52(3):70-77.
ZHANG Guanping,LIU Yanhui,TAN Ping,JIN Jianmin.Study on Optimization of Passive Viscous Damper and Passive Hybrid Control Seismic Response[J].Advanced Engineering Sciences,2020,52(3):70-77.