Direct tension tests on notched and un-notched plain concrete specimens

Abstract

Direct tension tests were conducted on plain concrete specimens in a stiff loading frame which allowed complete stress-deformation relations to be obtained. The suitability of the specimen shape and the testing apparatus was verified by finite-element analysis. The behaviours of notched and un-notched specimens with different water-cement ratios were examined and compared. Piecewise linear and exponential stress-deformation relations are proposed and interpreted physically. Relationships between fracture parameters fracture energy and brittleness indices) and basic strength properties are also presented.

Relationship between fracture area and tensile strength of cement paste with supplementary cementitious materials

“…(3) Testing apparatus: the following modes of gripping the specimens for direct tension test have been adopted by many researchers. They are by means of (1) rings on truncated cones [19], (2) embedded steel bars [20][21][22][23], (3) gluing [11,[24][25][26][27][28][29] and (4) lateral gripping [30,31]. (4) Estimated value: the tensile strength is estimated from the compressive strength using empirical correlation equations [17,18,[32][33][34].…”

Strength Assessment of Structural Elements

“…Smeared crack approach is adopted for analysis [13]. In the post-cracking region, to represent tension stiffening, fracture energy was calculated and assigned according to the formulas given by Phillips and Binsheng [14].…”

A practical method for uniaxial tension test of concrete

“…2. Specimen shape: a prism [5,13], a plate [9], a cylinder [7,8,11] or a dog-bone type [5,6,10,[12][13][14] 3. Applying notches: adopted [7,8], excluded [5,9,11,14] or both [12,13].…”

“…Specimen shape: a prism [5,13], a plate [9], a cylinder [7,8,11] or a dog-bone type [5,6,10,[12][13][14] 3. Applying notches: adopted [7,8], excluded [5,9,11,14] or both [12,13]. Stage 4.Treatment for lateral flexing: completely 1 prevented [5,6], partially prevent [7,8,[11][12][13], 2 untouched [9,14] or artificially produced [10].…”

“…Applying notches: adopted [7,8], excluded [5,9,11,14] or both [12,13]. Stage 4.Treatment for lateral flexing: completely 1 prevented [5,6], partially prevent [7,8,[11][12][13], 2 untouched [9,14] or artificially produced [10]. 3 5.…”