The temperature characteristic of fiber-optic pre-embedded concrete bar sensor

A fiber-optic pre-embedded concrete bar (PECB) sensor for use in the practi cal engineering construction of concrete structures is designed. Taking int o account the effects of the fiber protective coating, a model is establish ed. Based on the model, the temperature characteristics of fiber-optic PECB sensors are analyzed. Compared with the theoretical analyses, the temperat ure behavior of three typical cement-based matrix materials: cement paste, cement-sand mixture material and concrete pre-embedded bar sensors have bee n tested by using a white light fiber-optic interferometer sensing system. (C) 2001 Elsevier Science B.V. All rights reserved.