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Active control of building structures under seismic load using a new uniform deformation-based control algorithm
Structures ( IF 4.1 ) Pub Date : 2021-05-06 , DOI: 10.1016/j.istruc.2021.04.054
R. Karami Mohammadi , Hadi Ghamari , Ehsan Noroozinejad Farsangi

There are several algorithms for determining control forces of active devices in civil engineering structures. Uniform distribution of deformations theory is a structural concept which mainly focuses on equalizing deformations in order to promote the utilization of ductility capacity of structural elements thereby mitigating damages to a structure. In common active control algorithms, deformation uniformity and reducing damages are barely noted. In this research, a new active control algorithm regarding uniform deformation theory will be proposed. Uniform distribution of Deformation Control (UDC) algorithm consists of a massless optimized Virtual Added linear structure with Pinned connections (VAP) which is added to a desired original structure. This VAP can be treated as an added stiffness matrix. Once the parameters of the VAP were optimized in a manner that the desired responses were obtained from the new integrated structure, then, the new integrated structure is developed and analyzed in each time step. Finally, the VAP beams axial forces are extracted and applied to the original structure as control forces via active control devices such as active tendons.

This proposed control algorithm is simple and effective in reducing responses especially drifts, making more uniform thereby reducing structural damages as well as decreasing the required capacity of actuators and the power consumption eventually. High potential and promising performance of the proposed UDC algorithm will be represented through numerical investigation in an office building example. The results are compared with Nonlinear Instantaneous Optimal Control (NIOC) algorithm as a very common active control algorithm for linear and nonlinear structures.



中文翻译:

基于新的均匀变形控制算法的地震荷载下建筑物结构的主动控制

有几种算法可以确定土木工程结构中有源设备的控制力。变形的均匀分布理论是一种结构概念,主要关注于均衡变形,以促进结构构件的延性能力的利用,从而减轻对结构的破坏。在常见的主动控制算法中,几乎没有注意到变形的均匀性和减少的损坏。在这项研究中,将提出一种新的关于均匀变形理论的主动控制算法。变形控制(UDC)算法的均匀分布由无质量优化的带有固定连接(VAP)的虚拟添加线性结构组成,该结构被添加到所需的原始结构中。可以将此VAP视为增加的刚度矩阵。一旦以从新的集成结构中获得所需响应的方式优化了VAP的参数,便可以在每个时间步骤中开发和分析新的集成结构。最终,VAP梁的轴向力被提取出来,并通过主动控制装置(例如主动筋)作为控制力施加到原始结构上。

所提出的控制算法简单有效,可减少响应尤其是漂移,使其更加均匀,从而减少结构损坏,并最终减少所需的执行器容量和功耗。拟议的UDC算法的高潜力和有希望的性能将通过在办公楼示例中的数值研究来表示。将结果与非线性瞬时最优控制(NIOC)算法进行比较,该算法是用于线性和非线性结构的非常常见的主动控制算法。

更新日期:2021-05-06
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