砌体平面分析连续体模型:基于失效模式分类的方法

IF 1.9 3区 工程技术 Q3 MECHANICS Meccanica Pub Date : 2024-08-30 DOI:10.1007/s11012-024-01864-5
G. Bertani, L. Patruno, A. M. D’Altri, G. Castellazzi, M. Cervera, S. de Miranda
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摘要

本文介绍了一种用于砌体结构平面分析的多失效连续模型。该模型以最近提出的单面多破坏强度域为基础,在弹塑性框架内实施,对砌体墙进行非线性增量静力分析。该模型的一个主要特点是,可以识别激活的破坏机制,并计算相应的塑性应变演变。特别是,通过为每种失效模式分配特定权重,可确保区分挤压失效、接缝失效(水平、垂直和对角线)和接缝-块体混合失效。这相当于一种分类程序,可根据应力状态提供的信息选择有效的失效模式。作为这项工作的另一个新颖之处,还选择了特别的非关联流动规则来独立描述每种失效模式,从而可以直接跟踪它们的非线性演变。我们使用著名的数值实例来展示这种方法的能力。从这些例子中可以看出,所提出的连续体模型是准确的,对与所考虑的失效模式相关的塑性应变的跟踪可以直接解释结果。
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A continuum model for in-plane analysis of masonry: an approach based on failure mode classification

In this paper, a multi-failure continuum model for in-plane analysis of masonry structures is introduced. The model is based on a recently-proposed single-surface multi-failure strength domain, and is here implemented in an elasto-plastic framework to perform nonlinear incremental static analyses on masonry walls. As a key feature of the model, the activated failure mechanism(s) can be identified and the corresponding plastic strains evolution computed. In particular, the distinction between crushing failure, joint failure (horizontal, vertical, and diagonal) and mixed joint-block failure is guaranteed by means of specific weights assigned to each failure mode. This amounts to a classification procedure which selects the active failure modes based on the information provided by the stress state. As a further novelty of this work, ad hoc nonassociated flow rules are then chosen to characterize each failure mode independently, so allowing a straightforward tracking of their nonlinear evolution. Well-known numerical examples are used to show the capability of the approach. From these, the proposed continuum model appears accurate and the tracking of the plastic strains related to the considered failure modes allows a straightforward interpretation of the results.

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来源期刊
Meccanica
Meccanica 物理-力学
CiteScore
4.70
自引率
3.70%
发文量
151
审稿时长
7 months
期刊介绍: Meccanica focuses on the methodological framework shared by mechanical scientists when addressing theoretical or applied problems. Original papers address various aspects of mechanical and mathematical modeling, of solution, as well as of analysis of system behavior. The journal explores fundamental and applications issues in established areas of mechanics research as well as in emerging fields; contemporary research on general mechanics, solid and structural mechanics, fluid mechanics, and mechanics of machines; interdisciplinary fields between mechanics and other mathematical and engineering sciences; interaction of mechanics with dynamical systems, advanced materials, control and computation; electromechanics; biomechanics. Articles include full length papers; topical overviews; brief notes; discussions and comments on published papers; book reviews; and an international calendar of conferences. Meccanica, the official journal of the Italian Association of Theoretical and Applied Mechanics, was established in 1966.
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