| 三维隔震单层球面网壳结构频率相关变阻尼半主动控制 |
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| 引用本文： | 石运东,韦鑫,丁阳,王涛.三维隔震单层球面网壳结构频率相关变阻尼半主动控制[J].地震工程与工程振动,2022,42(1):143-153. |
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| 作者姓名： | 石运东 韦鑫 丁阳 王涛 |
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| 作者单位： | 中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080;天津大学建筑工程学院,天津300350;天津大学建筑工程学院,天津300350;中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 |
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| 基金项目： | 土木工程防灾国家重点实验室开放基金项目（SLDRCE18-03）；;国家自然科学基金项目（51978463）；;国家重点研发计划项目（2018YFC1504304）~~； |
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| 摘 要： | 在不同频率特征的地震动作用下,三维隔震单层球面网壳结构隔震层最优阻尼设计不同.文中基于单自由度体系加速度传递率函数,提出一种地震动主频相关的加速度阈值变阻尼半主动控制方法以及地震动主频分区识别方法.基于ABAQUS软件的DLOAD子程序,开展了三维隔震单层球面网壳被动控制与半主动控制有限元计算,对节点加速度、杆件轴力进...
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| 关 键 词： | 三维隔震 单层球面网壳 地震动主频 半主动控制 最优被动控制 |
Semi-active control with frequency dependent variable damping for three-dimensional isolated single-layer spherical reticulated shell structure |
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| SHI Yundong,WEI Xin,DING Yang,WANG Tao.Semi-active control with frequency dependent variable damping for three-dimensional isolated single-layer spherical reticulated shell structure[J].Earthquake Engineering and Engineering Vibration,2022,42(1):143-153. |
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| Authors: | SHI Yundong WEI Xin DING Yang WANG Tao |
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| Institution: | (Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China) |
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| Abstract: | The optimal damping of the isolation layer is different for the three-dimensional(3D)isolated single-layer spherical reticulated shell structure under ground motions with different frequency characteristics.A ground motion dominant frequency dependent semi-active control with variable damping adjusted based on an acceleration threshold and a method to identify the dominant frequency region are proposed based on the acceleration transfer function of the SDOF system.Passive and semi-active control simulations of a 3D isolated single-layer spherical shell are conducted utilizing the DLOAD subroutine in ABAQUS and the structural acceleration and member axial force responses are analyzed.The results show that the semi-active control of complex structures can be achieved by the DLOAD method.The semi-active control method can quickly identify the dominant frequency of the motion,and gradually adjust the demanded damping with acceleration threshold damping optimization to avoid abrupt change of responses due to the damping switch.The dynamic response of the semi-active control is close to that of the optimal passive control which assumes the ground motion is known in prior. |
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| Keywords: | three-dimensional isolation single-layer spherical shell ground motion dominant frequency semi-active control optimal passive control |
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