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中文摘要：
针对粘土心墙石坝内部变形的监测，提出了一种基于摩擦端承桩原理的光纤Bragg光栅（FBG）应变传感器。利用在大坝心墙内部埋设FBG传感器的方式，通过振动台模型试验，实时监测了大坝模型内部在地震作用下的应变响应，评价了大坝内部在地震作用下的健康状况。试验结果表明，该传感器埋人结构中能很好地与大坝结合，可以较早监测到模型内部的开裂情况，并且在试验中存活率高、安装灵活及可重复使用。
英文摘要：
The internal deformation in clay core wall rockfill dam is a primary parameter to evaluate the structure health of this dam type. However, the inner deformation monitoring has always been a challenge since it can not be detected by traditional equipment accurately. This paper presents a kind of fiber Bragg grating（FBG） strain sensor based on the principle of friction and en＆bearing piles, which is characterized by its small size, ease of Cormection serially, high strain sensitivity, etc. The novel distributed Fig5 strain sensor is embedded into the model clay core wall rockfill dam to monitor the inner deformation real-timely, so as to investigate the internal health status under seismic action produced by vibrating table. The results demonstrate that the FBG strain sensor can be embedded well with structure and can predict inner crack status in advance. In addition, this kind of FBG sensor shows advantages of high sur- vival rate, ease of installation and reusability. The experiment analysis proves the effectiveness of this measurement technique based on FBG in inner deformation monitoring o（ the clay core wall rockfill dam.
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