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Sensors 2013, 13(5), 6746-6758; doi:10.3390/s130506746
Article

A Deformed Shape Monitoring Model for Building Structures Based on a 2D Laser Scanner

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Received: 18 March 2013; in revised form: 24 April 2013 / Accepted: 14 May 2013 / Published: 21 May 2013
(This article belongs to the Section Physical Sensors)
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Abstract: High-rise buildings subjected to lateral loads such as wind and earthquake loads must be checked not to exceed the limits on the maximum lateral displacement or the maximum inter-story drift ratios. In this paper, a sensing model for deformed shapes of a building structure in motion is presented. The deformed shape sensing model based on a 2D scanner consists of five modules: (1) module for acquiring coordinate information of a point in a building; (2) module for coordinate transformation and data arrangement for generation of time history of the point; (3) module for smoothing by adjacent averaging technique; (4) module for generation of the displacement history for each story and deformed shape of a building, and (5) module for evaluation of the serviceability of a building. The feasibility of the sensing model based on a 2D laser scanner is tested through free vibration tests of a three-story steel frame structure with a relatively high slenderness ratio of 5.0. Free vibration responses measured from both laser displacement sensors and a 2D laser scanner are compared. In the experimentation, the deformed shapes were obtained from three different methods: the model based on the 2D laser scanner, the direct measurement based on laser displacement sensors, and the numerical method using acceleration data and the displacements from GPS. As a result, it is confirmed that the deformed shape measurement model based on a 2D laser scanner can be a promising alternative for high-rise buildings where installation of laser displacement sensors is impossible.
Keywords: displacement sensing; deformed shape; 2D laser scanner; structural health monitoring displacement sensing; deformed shape; 2D laser scanner; structural health monitoring
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Choi, S.W.; Kim, B.R.; Lee, H.M.; Kim, Y.; Park, H.S. A Deformed Shape Monitoring Model for Building Structures Based on a 2D Laser Scanner. Sensors 2013, 13, 6746-6758.

AMA Style

Choi SW, Kim BR, Lee HM, Kim Y, Park HS. A Deformed Shape Monitoring Model for Building Structures Based on a 2D Laser Scanner. Sensors. 2013; 13(5):6746-6758.

Chicago/Turabian Style

Choi, Se W.; Kim, Bub R.; Lee, Hong M.; Kim, Yousok; Park, Hyo S. 2013. "A Deformed Shape Monitoring Model for Building Structures Based on a 2D Laser Scanner." Sensors 13, no. 5: 6746-6758.



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