A simple method for determining the true specific fracture energy of concrete

Magazine of Concrete Research - Tập 55 Số 5 - Trang 471-481 - 2003
B. L. Karihaloo1, H. M. Abdalla1, Thanongsak Imjai1
1School of Engineering, Cardiff University, Queen's Buildings PO Box 925, Cardiff CF24 0YF, UK

Tóm tắt

In a recent paper, Abdalla and Karihaloo confirmed the boundary effect hypothesis of Hu and Wittmann and observed that a size-independent specific fracture energy GF of concrete could be obtained by testing three point bend (TPB) or wedge splitting (WS) specimens containing either a very shallow or a deep starter notch. This observation was based on TPB and WS tests on limited number of specimens. In this paper, we have re-evaluated 26 test data sets on specific fracture energy of concrete published in the literature to assess the validity of this observation. The re-evaluation is found to support this observation. The determination of the true specific fracture energy GF of concrete thus becomes a simple and straightforward task requiring very few specimens of the same dimensions and shape. This re-evaluation also provides guidance for the selection of the specimen dimensions depending on the maximum size of aggregate used in the concrete mix in order to obtain its true GF.

Từ khóa


Tài liệu tham khảo

Karihaloo B. L., 1995, Fracture Mechanics and Structural Concrete

10.1007/BF02473065

10.1007/BF02472591

10.1007/BF02472590

Duan K., 2001, Proc FRAMCOS-4, 49

10.1016/S0013-7944(02)00223-0

10.1016/S0013-7944(99)00123-X

10.1680/macr.1984.36.129.227

10.1016/0008-8846(85)90016-X

10.1680/macr.1986.38.135.67

10.1680/macr.2003.55.2.133

10.1007/BF02472917

Hillerborg A., Wittmann F. H. Analysis of one single crack, in Fracture Mechanics of Concrete. 1983, Elsevier, Amsterdam, 223–249.

Refai M. E., 1987, Report No. 190

Nallathambi P. Fracture Behaviour of Plain Concrete. PhD thesis, 1986, University of Newcastle, NSW.

Thông tin
Thông tin xuất bản

Magazine of Concrete Research

Tập 55 Số 5

471-481

Thông tin tác giả