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Apr 26, 2012
FBG Sensor-Based Monitoring of a Reinforced Concrete Frame under Pushover Testing
Authors: X. F. Zhao [email protected] and Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA, G. Song [email protected], M. Fernandez, Y. L. Mo [email protected], and J. P. Ou [email protected]Author Affiliations
Publication: Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
This paper presents monitoring results of a two-story reinforcement concrete frame (RCF) under a pushover test by using various fiber Bragg grating (FBG) sensors, including the bare FBG strain sensors, long gage FBG strain sensors, and FBG displacement sensors . The long gage FBG strain sensors and the FBG displacement sensors are developed by the authors. The FBG sensors are either embedded in the structure or installed on the concrete surface of the frame structure to monitor the rebar strain, the concrete surface strain, or the crack width development. The testing results show that FBG sensors can measure rebar strain precisely and that the long gage strain FBG sensors can measure concrete surface average strain precisely. Destructive pushover test results show that the FBG strain sensors can detect the nonlinear strain development of the rebars. The yielding point was precisely monitored by the FBG sensors. Crack width development at certain location of the concrete structure is monitored by FBG displacement sensor, also with high precision.
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© 2010 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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School of Civil Engineering, Dalian university of technology, Dalian, Linggong Road, 116085, China. E-mail: [email protected] and Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA. E-mail: [email protected]
M. Fernandez
Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
Department of Civil and Env. Engineering, University of Houston, Houston, TX 77204, USA. E-mail: [email protected]
School of Civil Engineering, Dalian university of technology, Dalian, Linggong Road, 116085, China and School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, Haihe road, China. E-mail: [email protected]
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