期刊
ADVANCES IN ENGINEERING SOFTWARE
卷 72, 期 -, 页码 147-154出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.advengsoft.2013.10.001
关键词
Fracture-mechanical parameters; Inverse analysis; Artificial neural networks; Nonlinear analysis; Fracture mechanics; FraMePID-3PB software
类别
资金
- Grant Agency of the Czech Republic [13-03662S]
- specific university research project at Brno University of Technology [FAST-S-12-6]
Knowledge regarding the values of fracture-mechanical parameters is critical for the virtual failure modeling of elements and structures made of concrete. A key parameter in nonlinear fracture mechanics modeling is the specific fracture energy of concrete, and its variability. Three-point bending tests on notched-beam specimens are fundamental experiments for the determination of fracture-mechanical parameters. In the present paper, two basic approaches are applied to determine fracture-mechanical parameter values from these tests: (i) the effective crack model/work-of-fracture method, and (ii) inverse analysis using artificial neural networks and stochastic simulations. First, the paper describes suitable methods for the determination of fracture-mechanical parameters. Second, the FraMeP1D-3PB software tool, which has been developed in order to automate the whole time consuming process of inverse analysis, is described. Finally, the verification of methodology and software is presented using two illustrative examples. (C) 2013 Elsevier Ltd. All rights reserved.
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