R & D of smart FRP-OFBG-based steel strand and its application in monitoring of prestressing loss for RC

Zhi Zhou; Hui Zhou; Ying Huang; Jinping Ou

doi:10.1117/12.777264

7 April 2008 R & D of smart FRP-OFBG-based steel strand and its application in monitoring of prestressing loss for RC

Zhi Zhou, Hui Zhou, Ying Huang, Jinping Ou

Proceedings Volume 6933, Smart Sensor Phenomena, Technology, Networks, and Systems 2008; 693313 (2008) https://doi.org/10.1117/12.777264
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

The long-term monitoring and performance evaluation techniques for the steel strand based pre-stressed structures are still not mature yet, especially for the prestressing loss monitoring and prediction. The main problem of this issue is lack of reliable monitoring techniques. To resolve this problem, in this paper, a new kind of quasi-distributed smart steel strand based on FRP-OFBG(Fiber Reinforced Polymer-Optical Fiber Bragg Grating) has been developed and its pre-stress monitoring principle has been also given. The test of the post-tension pre-stressed concrete beam with bonded tendons and its tensioning experiments have been conducted. And the prestressing loss of the steel strands has been monitored using the FBG in it. Researches results indicate that this kind of smart steel strand can monitor both instant loss and permanent loss of the prestressing successfully, and it can preferably describe the pre-stress loss state of the pre-stressed structure. Compared with the traditional monitoring instrument, this kind of smart steel strand owns distinct advantages and broad application foregrounds.

Citation Download Citation

Zhi Zhou, Hui Zhou, Ying Huang, and Jinping Ou "R & D of smart FRP-OFBG-based steel strand and its application in monitoring of prestressing loss for RC", Proc. SPIE 6933, Smart Sensor Phenomena, Technology, Networks, and Systems 2008, 693313 (7 April 2008); https://doi.org/10.1117/12.777264

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