Kozłowski Marcin, Galman Iwona, Jasiński Radosław
Department of Structural Engineering, Silesian University of Technology, 44-100 Gliwice, Poland.
Department of Building Structures and Laboratory of Civil Engineering Faculty, Silesian University of Technology, 44-100 Gliwice, Poland.
Materials (Basel). 2020 Sep 11;13(18):4035. doi: 10.3390/ma13184035.
This paper presents the development of a numerical model aimed at the simulation of nonlinear behaviour of traditional joints between walls made of autoclaved aerated concrete (AAC) masonry units. Nonlinear behaviour and cracking of AAC and mortar were simulated using the concrete damaged plasticity (CDP) model available in the ABAQUS finite element software. The paper also presents and discusses the results of an experimental campaign involving testing six T-shaped, monosymmetric samples with traditional joints between walls loaded in shear. The results were used to validate the numerical model. The validation confirmed that the model is capable of producing accurate results and predicting the structural behaviour with a reasonably good accuracy in elastic and post-elastic stages. Furthermore, a sensitivity study was conducted, in which the variation of elastic modulus, Poisson's ratio, tensile strength, compression strength and fracture energy of AAC was investigated. Results showed that the variation of elastic modulus, tensile strength and fracture energy is most critical to the structural behaviour of the model, while variation of the remaining parameters has a negligible effect on the results.
本文介绍了一个数值模型的开发，该模型旨在模拟由蒸压加气混凝土（AAC）砌体单元制成的墙体之间传统节点的非线性行为。使用ABAQUS有限元软件中的混凝土损伤塑性（CDP）模型来模拟AAC和砂浆的非线性行为及开裂情况。本文还展示并讨论了一项试验活动的结果，该试验涉及测试六个带有传统墙体间节点的T形单对称样本，并对其进行剪切加载。这些结果被用于验证数值模型。验证结果证实，该模型能够产生准确的结果，并在弹性和弹后阶段以相当高的精度预测结构行为。此外，还进行了一项敏感性研究，其中研究了AAC的弹性模量、泊松比、抗拉强度、抗压强度和断裂能的变化。结果表明，弹性模量、抗拉强度和断裂能的变化对模型的结构行为最为关键，而其余参数的变化对结果的影响可忽略不计。
