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RISS 인기검색어
- 검색키워드
- 저자 : Ch. Naga Satish Kumar (검색결과 2 건)
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Effect of fiber and aggregate size on mode-I fracture parameters of high strength concrete
Kumar, Ch.Naga Satish,Krishna, P.V.V.S.S.R.,Kumar, D.Rohini Techno-Press 2017 Advances in concrete construction Vol.5 No.6
In this paper, an experimental investigation was carried out to study the effect of volume fraction of fiber and maximum aggregate size on mode-I fracture parameters of high strength concrete. Total of 108 beams were tested on loading frame with three point loading, the variables in the high strength concrete beams are aggregate size (20 mm, 16 mm and 10 mm) and volume fraction of fibers (0%, 0.5%, 1% and 1.5%). The fracture parameters like fracture energy, brittleness number and fracture process zone were analyzed by the size effect method (SEM). It was found that fracture energy (Gf) increases with increasing the Maximum aggregate size and also increasing the volume of fibers, brittleness number (${\beta}$) decreases and fracture process zone (CF) increases.
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An Empirical Formula for Mode-II Fracture Energy of Concrete
Ch. Naga Satish Kumar,T. D. Gunneswara Rao 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.3
This paper presents an experimental investigation to understand the influence of Maximum Size of the Aggregate (MSA) andcompressive strength of concrete on the Mode-II fracture parameters (Fracture energy (GIIf) and Brittleness number) of normal and highstrength of concrete. An empirical formula for Mode-II fracture energy (GIIf) based on the Bazant’s size effect law is developed in termsof maximum size of aggregate and the compressive strength of concrete. A linear constitutive relationship between shear stress and slipi.e., the linear softening curve for Mode-II fracture of concrete is presented by conducting experiments on the double edge notchedspecimen. The experimental results indicated that increase in the grade of concrete (compressive strength) increases the brittleness of themember and Mode-II fracture energy and also increase in the maximum size of aggregate increases the Mode-II fracture energy.
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