原文传递
Integrated Fracture-Based Model Formulation for RC Crack Analysis
| 题名： | Integrated Fracture-Based Model Formulation for RC Crack Analysis |
| 其他题名： | Bazant,Z.P.,and M.T.Kazemi.1990."Determination of fracture energy,process zone length and brittleness number from size effect,with application to rock and concrete."Int.J.Fract.44(2):111-131.https://doi.org/10.1007/BF00047063. |
| 正文语种： | 英文 |
| 作者： | Tahreer M. Fayyad |
| 关键词： | Reinforced concrete;Fracture;Cracking;Modeling;Crack propagation |
| 摘要： | There is an opportunity to revisit and generalize classical theories for concrete cracking in light of increased interest in the use of nonconventional reinforcing materials and material efficiency. Fracture-based models to describe concrete cracking have potential but a limitation has been that many variables and different phenomena have to be incorporated to produce realistic material models. In this paper, an integrated fracture-based model (IFBM) is developed to predict the behavior of lightly reinforced concrete beams. The proposed model is a closed-form solution that integrates different local phenomena to more precisely describe the onset of cracking, crack propagation and crack rotation. The IFBM incorporates postcracking tensile stresses in the concrete, the bond-slip behavior between the reinforcement and concrete, and compression softening in the concrete compressive zone. The model can predict parameters such as the crack length development and crack mouth opening displacement in Mode I lightly reinforced concrete flexural specimens subjected to three-point bending. The predictions show a fairly good agreement with experimental results for small-scale reinforced concrete beams with low reinforcement ratios (0.15-0.5％). The ability of the IFBM to identify specific failure modes and to capture the crack propagation and crack rotation stages of behavior in lightly reinforced concrete beams are particular advantages. Such an approach provides a powerful tool to study the problem of minimum reinforcement requirements. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N07018 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0002058 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 07 |
| 页码： | 230-245 |
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