Document Type

Thesis

Date of Award

1-31-1989

Degree Name

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

Department

Civil and Environmental Engineering

First Advisor

Farhad Ansari

Second Advisor

C.T. Thomas Hsu

Abstract

This thesis presents an experimental evaluation of J-integral for concrete subjected to impact loading. Twenty four three-point bend specimens with two different thicknesses and mid-span notch lengths were tested under impact velocities of 167.22 in/sec (424.74 cm/sec) and 261.78 in/sec (664.92 cm/sec). Multi specimen method was used to analyze and estimate JI and its critical J-Ic values. Effects of specimen thickness and impact velocity on J-Ic values were observed and discussed. Evaluation of J-Ic Values from the experimental results of this study indicated that can be characterized as a material constant even under different impact velocities. The mean value of dynamic J-Ic was calculated to be 2216.82x10-3lb/in (3879.44x10-3 NEWTON/CM) with a standard error of 159.02x10-3 lb/in (278.29x10-3NEWTON/CM).

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