Optical fiber sensors for monitoring strain on rebar-type and cable-type bolts

Marten J. de Vries; Kent A. Murphy; John Goris; Richard O. Claus

doi:10.1117/12.207732

20 April 1995 Optical fiber sensors for monitoring strain on rebar-type and cable-type bolts

Marten J. de Vries, Kent A. Murphy, John Goris, Richard O. Claus

Proceedings Volume 2446, Smart Structures and Materials 1995: Smart Systems for Bridges, Structures, and Highways; (1995) https://doi.org/10.1117/12.207732
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

This paper describes the use of short gage length optical fiber sensors for the measurement of relative strain in rebar-type and cable-type bolts used in the mining industry to support unstable material or to keep rock masses together. For research purposes, and in order to develop numerical models for analyzing rockmass behavior, these bolts are instrumented with strain gages. For cable-type bolts, for example, traditional gages, such as foil strain gages, have proven to be inefficient or unreliable and new sensing methods have to be developed. Optical fiber-based sensors, which were surface mounted, using an epoxy resin adhesive, inside a small groove of the king wire of a 7-strand cable, could offer an attractive option for such applications. Tests include the fatigue loading of the instrumented rebar and cable bolt specimen. Stress-strain curves for both the rebar-type and cable-type bolts are provided. Practical applications and limitations of such sensor methods for bolt analysis in the future are described as well.

Citation Download Citation

Marten J. de Vries, Kent A. Murphy, John Goris, and Richard O. Claus "Optical fiber sensors for monitoring strain on rebar-type and cable-type bolts", Proc. SPIE 2446, Smart Structures and Materials 1995: Smart Systems for Bridges, Structures, and Highways, (20 April 1995); https://doi.org/10.1117/12.207732

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available