A measurement method for 1-D distribution of lateral deformation of soils in shaking table tests using FBG technique
WANG Yun-long1, 2, YUAN Xiao-ming1, 2, YIN Jian-hua3
1. Institute of Engineering Mechanics, Chinese Earthquake Administration, Harbin 150080, China; 2. Key Laboratory of Earthquake Engineering and Engineering Vibration, Chinese Earthquake Administration, Harbin 150080, China; 3. Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
In this work, a measurement system using the FBG sensing technology is designed to assess the one-dimensional distribution of lateral deformation of model soils in the shaking table tests. An optical fiber with multiplexed fiber Bragg grating (FBG) strain sensors is sticked to a thin and flexible strip, which is inserted vertically through the soils. The strip will be bended driven by the lateral movement of the soils due to horizontal ground motion. The strain information is obtained by the FBG sensors. The strain-to-displacement conversion is done via continuum mechanics models. The deflection of the strip is considered to be the lateral deformation of the soils in the front of the strip. This measurement system is tested and verified through the shaking table tests and compared with other measurements.
汪云龙, 袁晓铭, 殷建华. 基于光纤光栅传感技术的测量模型土体侧向变形一维分布的方法[J]. 岩土工程学报, 2013, 35(10): 1908-1913.
WANG Yun-long, YUAN Xiao-ming, YIN Jian-hua. A measurement method for 1-D distribution of lateral deformation of soils in shaking table tests using FBG technique. Chinese J. Geot. Eng., 2013, 35(10): 1908-1913.
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