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Structural Monitoring and Maintenance Volume 5, Number 1, March 2018, pages 111-127 DOI: http://dx.doi.org/10.12989/smm.2018.5.1.111 |
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Inclinometer-based method to monitor displacement of high-rise buildings |
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Hai-Bei Xiong, Ji-Xing Cao and Feng-Liang Zhang
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| Abstract | ||
| Horizontal displacement of high-rise building is an essential index for assessing the structural performance and safety. In this paper, a novel inclinometer-based method is proposed to address this issue and an algorithm based on three spline interpolation principle is presented to estimate the horizontal displacement of high-rise buildings. In this method, the whole structure is divided into different elements by different measured points. The story drift angle curve of each element is modeled as a three spline curve. The horizontal displacement can be estimated after integration of the story drift angle curve. A numerical example is designed to verify the proposed method and the result shows this method can effectively estimate the horizontal displacement with high accuracy. After that, this method is applied to a practical slender structure - Shanghai Tower. Nature frequencies identification and deformation monitoring are conducted from the signal of inclinometers. It is concluded that inclinometer-based technology can not only be used for spectrum analysis and modal identification, but also for monitoring deformation of the whole structure. This inclinometer-based technology provides a novel method for future structural health monitoring. | ||
| Key Words | ||
| structural health monitoring; inclinometer-based technique; three spline interpolation principle; story drift angle; horizontal displacement | ||
| Address | ||
| Hai-Bei Xiong and Ji-Xing Cao: Research Institute of Structural Engineering and Disaster Reduction, Tongji University, 1239 Siping Road, Shanghai, China Feng-Liang Zhang: Research Institute of Structural Engineering and Disaster Reduction, Tongji University, 1239 Siping Road, Shanghai, China; Department of Civil and Earth Resources Engineering, Kyoto University, Kyoto, Japan | ||