Improved semi‐active control algorithm for hydraulic damper‐based braced buildings
Improved semi‐active control algorithm for hydraulic damper‐based braced buildings
复制标题
基于液压阻尼器的支撑建筑物改进的半主动控制算法
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Hong Pan
中科院分区：
文献类型：
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作者：
Mohsen Azimi;Akbar Rasoulnia;Zhibin Lin;Hong Pan
人们对结构控制系统进行了大量研究，以提高结构在地震下的抗震性能，并最终提供超越生命风险的高性能抗震建筑。在各种结构控制算法中，半主动控制策略已被广泛接受，因为它克服了被动或主动控制系统中存在的一些局限性，从而比同类算法具有更好的结构性能。在本研究中，开发了一种具有最小控制参数的新型半主动控制算法来驱动液压阻尼器，以有效控制地震荷载下低层和高层建筑结构的动态变形。新的控制器允许更少的输入和计算来确定液压阻尼器的阻尼系数，同时保持更高的性能。使用具有三个不同高度的 V 形支撑建筑物作为原型来演示所提出的半主动阻尼器的有效性。为性能标准定义了两个关键参数，即故事的最大漂移和加速度。仿真结果表明，所开发的半主动阻尼器可以显着提高建筑物在控制层位移和加速度方面的抗震性能。通过使用较少的输入和减少的时间延迟效应，所提出的控制系统与现有的半主动控制器相当。本研究的结果将帮助工程师设计减轻地震风险的控制系统，并有效促进基于性能的抗震设计。
Much research has been conducted on structural control systems to improve the seismic performance of structures under earthquakes and, ultimately, offer high performance‐resilient buildings beyond life risk mitigation. Among various structural control algorithms, semi‐active control strategies have been widely accepted for overcoming some limitations existed in either passive or active control systems, thereby leading to better structural performance over their counterparts. In this study, a new semi‐active control algorithm with minimum control parameters is developed to drive the hydraulic damper for effective control of the dynamic deformation of low‐ and high‐rise building structures under earthquake loadings. The new controller allows less input and computation for determining the damping coefficient of the hydraulic dampers while maintaining a higher performance. V‐braced buildings with three varying heights are used as prototypes to demonstrate the effectiveness of the proposed semi‐active damper. Two critical parameters, maximum drift and acceleration of stories, are defined for the performance criteria. The simulation results show that the developed semi‐active damper can significantly improve the seismic performance of the buildings in terms of controlled story drift and acceleration. By use of less input and reduced time delay effects, the proposed control system is comparable with those of existing semi‐active controllers. The findings in this study will help engineers to design control systems for seismic risk mitigation and effectively facilitate the performance‐based seismic design.