A 3D probabilistic model for explicit cracking of concrete

IF 2.9 4区 工程技术 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computers and Concrete Pub Date : 2021-06-01 DOI:10.12989/CAC.2021.27.6.549
M. Mota, E. Fairbairn, F. Ribeiro, P. Rossi, J. Tailhan, H. C. C. Andrade, M. Rita
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引用次数: 2

Abstract

Concrete is globally the most used building material. This fact shows the need to make advances in the prediction of its mechanical behavior. Despite being considered homogenous in many cases for simplification purposes, this material naturally has a high degree of heterogeneity, which presents challenges in terms of fracture process modeling, due to phenomena such as scale effect and softening behavior. In this context, the objective of this work is to present a 3D probabilistic cracking model based on the finite element method, in which material discontinuities are explicitly represented by interface elements. The threedimensional modeling of cracks makes it possible to analyze the fracture process in a more realistic way. In order to estimate statistical parameters that define the material heterogeneity, an inverse analysis procedure was performed using general laws defined by experimental investigations. The model and the inverse analysis strategy were validated mainly by the verification of scale effect at a level similar to that experimentally observed, taking into account the tensile failure of plain concretes. Results also indicate that different softening levels can be obtained.
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混凝土显式开裂的三维概率模型
混凝土是全球使用最多的建筑材料。这一事实表明,需要在预测其力学行为方面取得进展。尽管出于简化的目的,这种材料在许多情况下被认为是同质的,但由于尺度效应和软化行为等现象,这种材料自然具有高度的非均质性,这给断裂过程建模带来了挑战。在这种情况下,本工作的目的是提出一个基于有限元方法的三维概率开裂模型,其中材料不连续是由界面元素明确表示的。裂缝的三维建模使得更真实地分析断裂过程成为可能。为了估计定义材料异质性的统计参数,利用实验研究确定的一般规律进行了逆分析程序。模型和反分析策略主要通过在与实验观察相似的水平上验证尺度效应来验证,并考虑到素混凝土的拉伸破坏。结果还表明,可以得到不同程度的软化。
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来源期刊
Computers and Concrete
Computers and Concrete 工程技术-材料科学:表征与测试
CiteScore
8.60
自引率
7.30%
发文量
0
审稿时长
13.5 months
期刊介绍: Computers and Concrete is An International Journal that focuses on the computer applications in be considered suitable for publication in the journal. The journal covers the topics related to computational mechanics of concrete and modeling of concrete structures including plasticity fracture mechanics creep thermo-mechanics dynamic effects reliability and safety concepts automated design procedures stochastic mechanics performance under extreme conditions.
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