基于固体砌体结构中三种退化风险的湿热材料性能聚类方法的潜力

IF 1.8 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
Bruno Vanderschelden, Klaas Calle, N. Van Den Bossche
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引用次数: 4

摘要

历史砌体有着丰富多彩的历史,使其成为我们社会中珍贵的一部分。为了保存和保护这些遗产,需要适当的湿度控制、改造和修复策略。然而,由于历史砖砌体所固有的材料特性范围很大,单一统一的翻新策略似乎是不可能的。为了描述砖砌的相似性,对赵开发的现有聚类方法进行了评估。这个想法是,具有相似性能的不同类型的砖可以用一个具有代表性的砖来表示该群集,例如,在进行湿热模拟时。它可以通过减少表征过程和最小化耗时的实验室测量测试来帮助改进现有的改造实践。然而,在本文中,赵提出的方法受到质疑,因为聚类仅仅基于材料特性的同等影响,而忽略了响应行为和相关的退化风险。这篇文章的目的是双重的。首先,根据Zhao的说法,通过热湿模拟来评估聚类得到的砖的相似性,以确定同一聚类中的砖是否具有相似的退化风险。Zhao的聚类提供了关于物理材料特性的同质聚类,但在同一聚类中,不同砖块的降解风险存在显著差异。其次,提出了一种将降解特征的相似性转化为材料特性相似性的方法。采用敏感性分析研究了基于霉菌生长、木材腐烂和霜冻损害三种退化风险的响应行为。最后,基于不同退化现象的分类树,生成砖砌体整体聚类方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the potential of clustering approaches for hygrothermal material properties based on three degradation risks in solid masonry constructions
Historic masonry has a rich and colorful history making it a treasured part in our society. To preserve and protect this heritage, adequate moisture control, retrofit, and restauration strategies are required. However, due to the large range of material properties inherent to historic brickwork, a single uniform renovation strategy appears impossible. To describe similarity in brickwork, the existing clustering approach developed by Zhao was evaluated. The idea is that different types of bricks with similar properties can be represented by a single representative brick for that cluster, for example, when conducting hygrothermal simulations. It could help improve existing retrofit practice by reducing characterization processes and minimizing time-consuming laboratory measuring tests. However, in this paper the approach presented by Zhao is questioned since the clustering is solely based on an equal impact of the material properties and the response behavior and associated degradation risks are neglected. The aim of this paper was twofold. Firstly, similarity in brickwork obtained by clustering according to Zhao was evaluated by means of hygrothermal simulations to see whether bricks in the same cluster show similar degradation risks. Zhao’s clustering provides homogenous clusters regarding physical material properties, but significant variation was found in degradation risks for different bricks within the same cluster. Secondly, a methodology is presented to translate similarities in degradation profiles toward similarities in material properties. Sensitivity analyses were used to study the response behavior based on three degradations risks: mold growth, wood rot, and frost damage. Finally, an overall clustering scheme was generated for brickwork, based on classification trees for different degradation phenomena.
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来源期刊
Journal of Building Physics
Journal of Building Physics 工程技术-结构与建筑技术
CiteScore
5.10
自引率
15.00%
发文量
10
审稿时长
5.3 months
期刊介绍: Journal of Building Physics (J. Bldg. Phys) is an international, peer-reviewed journal that publishes a high quality research and state of the art “integrated” papers to promote scientifically thorough advancement of all the areas of non-structural performance of a building and particularly in heat, air, moisture transfer.
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