Measuring the Effect of Strengthened Concrete on the Fracture Characteristics of Notched Concrete Beams Through a Three-Point Beam Test
Published at : 31 Jul 2017
Volume : IJtech
Vol 8, No 4 (2017)
DOI : https://doi.org/10.14716/ijtech.v8i4.9486
Siregar, A.P. 2017. Measuring the Effect of Strengthened Concrete on the Fracture Characteristics of Notched Concrete Beams Through a Three-Point Beam Test . International Journal of Technology. Volume 8(4), pp.737-746
| Atur P.N. Siregar | Department of Civil Engineering, Faculty of Engineering, Tadulako University, Jl. Soekarno Hatta Km. 9, Palu, 94118 Sulawesi Tengah, Indonesia |
This study explores the effect of increased
concrete strength on the behavior of concrete failure. Experimental testing
using a three-point bend (TPB) test proposed by RILEM was carried out to
calculate the value of fracture energy (GF),
stress intensity factor (KIC),
and characteristic length (lch) of
the concrete. The values of GF
and lch, which are
proportional to the fracture process zone based on the fictitious crack model,
were employed to determine the effect of concrete strength on the concrete’s
fracture characteristic. KIC
was engaged to describe the initial crack in the concrete. Four different
concrete strengths of 40, 47, 53, and 100 MPa—were manufactured to produce
notched beam specimens with single-sized notches 25 mm deep. Results revealed
that the values of GF and KIC increased in the stronger
concretes. However, the value of lch
decreased significantly as concrete strength increased.
Characteristic length; Concrete strength; Fracture energy; Stress intensity factor