Smart Fiber-Reinforced Polymer Anchorage System with Optical Fiber Bragg Grating Sensors

Abstract

Civil Engineers have used fiber reinforced polymer (FRP) with high axial strength as an effective and economical alternative to steel in harsh corrosion environments. However, the practical applications of FRP are limited by the tendency of FRP materials to fail suddenly under lateral pressure and surface injury. For example, shear stresses result from the bonding effect between the FRP material and the structure of the anchorage system due to the lower shear strength of FRP. This paper proposes a novel smart FRP anchorage system with embedded optical fiber Bragg grating (FBG) sensors to monitor the axial strain state and accordingly the interfacial shear stress, as well as the interfacial damage characteristics of FRP anchorage. One FBG sensor was embedded in an FRP rod outside the anchorage region to evaluate the properties of the material, and seven FBG sensors were distributed along the rod in the anchor to monitor the axial strain variations and study the interfacial mechanical behaviors of the smart FRP anchorage under a static pulling load. The experimental results agreed well with theoretical predictions. The smart FRP anchorage system with optical FBG sensors proves effective and practical for monitoring the long-term mechanical behavior of FRP anchorage systems.

Meeting Name

Smart Sensor Phenomena, Technology, Networks, and Systems (2010: Mar. 8-10, San Diego, CA)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Anchorage Systems; Axial Strain; Axial Strength; Civil Engineers; Corrosion Environments; Embedded Optical Fibers; FBG Sensor; Fiber Reinforced Polymers; Interfacial Damages; Interfacial Mechanical Behavior; Interfacial Shear Stress; Lateral Pressures; Long-Term Mechanical Behavior; Optical FBG; Optical Fiber Bragg Grating Sensors; Pulling Loads; Surface Injury; Theoretical Prediction; Structural Health Monitoring

International Standard Book Number (ISBN)

978-0819480637

International Standard Serial Number (ISSN)

0277-786X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 SPIE, All rights reserved.

Publication Date

01 Mar 2010

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