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Date of Publication:2011-01-01

Journal:大连理工大学学报

Affiliation of Author(s):建设工程学部

Issue:1

Page Number:103-108

ISSN No.:1000-8608

Abstract:A small dimensional sensor with two holders in both sides of fiber Bragg grating (FBG), which is protected and packaged by a stainless steel tube, is used for strain measurement. Experiments were conducted on the universal material testing machine to calibrate the strain transferring characteristics in different parent materials. The strain measured by FBG sensor agrees well with the theoretical result. The tube-packaged strain FBG sensors are applied to the vibration experiments of artificial concrete dam models. The results show that this FBG strain sensor, which has the advantages of high sensitivity, low noise and long-term measure stability, can effectively monitor the changing trends of elastic strain and crack initiation strain of artificial concrete dam model in the vibration experiments. It is testified to be a promising potential instrument in long-term vibration-based structural health monitoring.

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