Title:
Stress-Strain Response of Microcracked Concrete in Direct Tension
Author(s):
Farhad Ansari
Publication:
Materials Journal
Volume:
84
Issue:
6
Appears on pages(s):
481-490
Keywords:
concretes; cracking (fracturing); crack width and spacing; deformation; lasers; measurement; microcracking; mechanical properties; stress-strain relationships; tensile strength; Materials Research
DOI:
10.14359/2532
Date:
11/1/1987
Abstract:
Behavior of concrete subjected to uniaxial tension is studied by laser speckle interferometry. The main emphasis is given to development of a technique for detection of microcracks, measurements of the width of microcracking zone, and calculating microcrack growth. Microcrack-macrocrack evolution is described from experimental results. Unique post-peak stress-strain and stress-deformation behavior were not observed. The stress-strain response of concrete was found to be gage-length dependent. Strains measured within a gage length inside the microcracking zone were two orders of magnitude higher than the values measured previously.