[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4334/IJCSM.2009.3.1.033

Study on Stress Transfer Property for Embedded FBG Strain Sensors in Concrete Monitoring

Jang, Il-Young (Civil and Environmental Engineering Dept., Kumoh National Institute of Technology)
Yun, Ying-Wei (Dept. of Civil Engineering, Luoyang Institute of Science and Technology)

Publication Information

International Journal of Concrete Structures and Materials / v.3, no.1, 2009 , pp. 33-37 More about this Journal

Abstract

Fiber Bragg grating (FBG) sensors already have been the focus for structural health monitoring (SHM) due to their distinguishing advantages. However, as bare optical fiber is very fragile, bare FBG strain sensor without encapsulation can not properly be applied in practical infrastructures. Therefore encapsulation techniques for making encapsulated FBG strain sensor show very important in pushing forward the application of FBG strain sensors in SHM. In this paper, a simplified approximate method to analyze the stress transferring rules for embedded FBG strain sensors in concrete monitoring is put forward according to mechanics of composite materials. Shear lag theory is applied to analyze the stress transferring rule of embedded FBG strain sensor in measured host material at the first time. The measured host objects (concrete) and the encapsulated FBG strain sensor are regarded as a composite, and then the stress transfer formula and stress transfer coefficient of encapsulated FBG strain sensor are obtained.

Keywords

fiber Bragg grating strain sensor; stress transfer rule; transfer coefficient; shear lag theory;

Citations & Related Records

Reference

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