A constrained minimization-based scheme against susceptibility of drift angle identification to parameters estimation error from measurements of one floor

doi:10.12989/sss.2024.33.2.119

IR > 土木工程学院

	A constrained minimization-based scheme against susceptibility of drift angle identification to parameters estimation error from measurements of one floor
	Xu, Kangqian 1; Mita, Akira 2; Li, Dawei3 ; Xue, Songtao 4; Li, Xianzhi 1
	2024-02
发表期刊	Smart Structures and Systems
ISSN	1738-1584
卷号	33 期号:2 页码:119-131
摘要	Drift angle is a significant index for diagnosing post-event structures. A common way to estimate this drift response is by using modal parameters identified under natural excitations. Although the modal parameters of shear structures cannot be identified accurately in the real environment, the identification error has little impact on the estimation when measurements from several floors are used. However, the estimation accuracy falls dramatically when there is only one accelerometer. This paper describes the susceptibility of single sensor identification to modelling error and simulations that preliminarily verified this characteristic. To make a robust evaluation from measurements of one floor of shear structures based on imprecisely identified parameters, a novel scheme is devised to approximately correct the mode shapes with respect to fictitious frequencies generated with a genetic algorithm; in particular, the scheme uses constrained minimization to take both the mathematical aspect and the realistic aspect of the mode shapes into account. The algorithm was validated by using a full-scale shear building. The differences between single-sensor and multiple-sensor estimations were analyzed. It was found that, as the number of accelerometers decreases, the error rises due to insufficient data and becomes very high when there is only one sensor. Moreover, when measurements for only one floor are available, the proposed method yields more precise and appropriate mode shapes, leading to a better estimation on the drift angle of the lower floors compared with a method designed for multiple sensors. As well, it is shown that the reduction in space complexity is offset by increasing the computation complexity. © 2024 Techno-Press, Ltd.
关键词	Accelerometers Composite beams and girders Constrained optimization Errors Genetic algorithms Modal analysis Parameter estimation Constrained minimization Drift angle Measurements of Modal parameters Mode shapes Multiple sensors Multistory shear structure Shear structure Single sensor Single sensor-based identification
DOI	10.12989/sss.2024.33.2.119
收录类别	EI
语种	英语
出版者	Techno-Press
EI入藏号	20241015709741
EI主题词	Floors
EI分类号	402 Buildings and Towers ; 408.2 Structural Members and Shapes ; 412 Concrete ; 921 Mathematics ; 943.1 Mechanical Instruments ; 961 Systems Science
原始文献类型	Journal article (JA)
EISSN	1738-1991
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/169935
专题	土木工程学院
通讯作者	Li, Xianzhi
作者单位	1.School of Civil Engineering, Qingdao University of Technology, Qingdao, China; 2.Department of System Design Engineering, Keio University, Yokohama, Japan; 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China; 4.Department of Disaster Mitigation for Structures, Tongji University, Shanghai, China
推荐引用方式 GB/T 7714	Xu, Kangqian,Mita, Akira,Li, Dawei,et al. A constrained minimization-based scheme against susceptibility of drift angle identification to parameters estimation error from measurements of one floor[J]. Smart Structures and Systems,2024,33(2):119-131.
APA	Xu, Kangqian,Mita, Akira,Li, Dawei,Xue, Songtao,&Li, Xianzhi.(2024).A constrained minimization-based scheme against susceptibility of drift angle identification to parameters estimation error from measurements of one floor.Smart Structures and Systems,33(2),119-131.
MLA	Xu, Kangqian,et al."A constrained minimization-based scheme against susceptibility of drift angle identification to parameters estimation error from measurements of one floor".Smart Structures and Systems 33.2(2024):119-131.