期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 44, 期 -, 页码 440-451出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2013.03.040
关键词
Concrete; Electronic speckle pattern interferometry; Crack characteristic; Fracture process zone; Incremental displacement collocation; method; Tension softening curve; Normal strength concrete; High strength concrete
The tension softening curves (TSCs) of plain concrete with compressive strengths varying between 40 and 90 MPa were estimated by performing three-point bending tests on pre-notched beams. Crack evolution and full-field deformation in the beams were measured using the electronic speckle pattern interferometry technique. The crack characteristics, including the crack opening displacement profiles, the width of the fracture process zone and the length of the crack, were evaluated. By using a newly developed incremental displacement collocation method, the TSCs of plain concrete were determined. To facilitate the use of TSCs by commercial finite element packages, the estimated TSCs were simplified to bilinear and exponential curves, and the related parameters were determined. (C) 2013 Elsevier Ltd. All rights reserved.
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