Evaluation of cracking mechanism in fiber reinforced concrete subjected to impulsive loading

Author

Rajendra K. Navalurkar, New Jersey Institute of Technology

Document Type

Thesis

Date of Award

5-31-1991

Degree Name

Master of Science in Civil Engineering - (M.S.)

Department

Civil and Environmental Engineering

First Advisor

Farhad Ansari

Second Advisor

William R. Spillers

Abstract

This thesis presents an experimental evaluation of J-Integral for plain and fiber reinforced concrete subjected to impact loading. A computer assisted instrumented Charpy test system was employed in applying the impact loads. Twenty two three point bend specimens with two different notch lengths were tested under impact velocity of 43.29 in/sec. Development and testing of a new fiber optic sensor, for the determination of internal Crack Tip Opening Displacements (CTOD) in concrete is described.

Evaluation of J_IC values from experimental results of this study indicate that J_IC can be characterized as a material constant. The Dynamic value of J_IC increased as the steel fiber content was increased, for plain concrete it was calculated to be 1.294 lb/in ( 225.12 N/m SI units) whereas for 1.5 % fiber reinforced concrete was found to be 2.354 lb/in. (411.95 N/m SI units). The critical CTOD δ_c values were found to decrease as the fiber content was increased.

Recommended Citation

Navalurkar, Rajendra K., "Evaluation of cracking mechanism in fiber reinforced concrete subjected to impulsive loading" (1991). Theses. 2570.
https://digitalcommons.njit.edu/theses/2570