Celano Thomas, Argiento Luca Umberto, Ceroni Francesca, Casapulla Claudia
Department of Engineering, University of Naples Parthenope, Centro Direzionale Is. C4, 80143 Napoli, Italy.
Department of Structure for Engineering and Architecture, University of Naples Federico II, Via Forno Vecchio, 80134 Napoli, Italy.
Materials (Basel). 2021 Oct 3;14(19):5780. doi: 10.3390/ma14195780.
This paper presents the results of several numerical analyses aimed at investigating the in-plane resistance of masonry walls by means of two modelling approaches: a finite element model (FEM) and a discrete macro-element model (DMEM). Non-linear analyses are developed, in both cases, by changing the mechanical properties of masonry (compressive and tensile strengths, fracture energy in compression and tension, shear strength) and the value of the vertical compression stress applied on the walls. The reliability of both numerical models is firstly checked by means of comparisons with experimental tests available in the literature. The analyses show that the numerical results provided by the two modelling approaches are in good agreement, in terms of both failure loads and modes, while some differences are observed in their load-displacement curves, especially in the non-linear field. Finally, the numerical in-plane resistances are compared with the theoretical formulations provided by the Italian building code for both flexural and shear failure modes and an amendment for the shape factor '' introduced in the code formulation for squat walls is proposed.
本文介绍了几种数值分析的结果，这些分析旨在通过两种建模方法研究砌体墙的面内抗力：有限元模型（FEM）和离散宏观单元模型（DMEM）。在这两种情况下，通过改变砌体的力学性能（抗压强度和抗拉强度、压缩和拉伸时的断裂能、抗剪强度）以及施加在墙体上的垂直压应力值来进行非线性分析。首先通过与文献中可用的试验测试进行比较来检验这两种数值模型的可靠性。分析表明，两种建模方法提供的数值结果在破坏荷载和破坏模式方面都有很好的一致性，而在它们的荷载-位移曲线中观察到了一些差异，特别是在非线性领域。最后，将数值面内抗力与意大利建筑规范针对弯曲和剪切破坏模式提供的理论公式进行了比较，并针对矮墙规范公式中引入的形状系数“提出了修正建议。
