A systemic approach to moisture problems in buildings for mould safety modelling
A systemic approach to moisture problems in buildings for mould safety modelling
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DOI：
10.1016/j.buildenv.2014.12.013
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发表时间：
2015-04
影响因子：
7.4
通讯作者：
K. Pietrzyk
中科院分区：
文献类型：
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作者：
K. Pietrzyk
建筑物中的霉菌生长会对建筑的健康、舒适度和耐用性产生负面影响，并会给居民带来严重的问题。面对巨大的不确定性，支持设计的确定性工具已被证明不足以进行决策。需要一种工具来处理建筑性能的概率风险/可靠性分析。一种系统的方法为分析提供了适当的理论基础。基于定性故障树分析，在建筑施工的不同层面上对结构对潮湿问题的易损性进行了分类：整体结构、部件或材料。基于系统分析的概念，利用概率极限状态方法，建立了一个从模具安全角度评估结构可靠性的通用模型，并对一个寒冷阁楼木质屋面板内表面霉菌萌发的风险分析进行了计算。表面的相对湿度(给定一定的表面温度间隔)被选为性能方面。木材上霉菌萌发的性能指标也被视为随机变量。对不同的阁楼地板结构的霉菌萌发的可能性进行了评估，在这些结构中，结构在材料或部件层面上进行了更改。霉菌萌发概率模型的应用使不同的冷阁楼结构的比较成为可能。讨论了与所提出的方法相耦合的不确定性。
Mould growth in buildings can have negative consequences on health, comfort, and durability of construction and can cause a significant problem for inhabitants. Confronted with significant uncertainty, deterministic tools supporting design have proved insufficient for decision making. A tool that addresses the probabilistic risk/reliability analysis of building performance is needed. A systemic approach provides a proper theoretical base for the analysis. Based on a qualitative fault tree analysis, structure related vulnerabilities to moisture problems have been classified at different levels of the building construction: whole structure, component or material. A general model for evaluating the reliability of structures with respect to mould safety and based on the concept of systemic analysis is applied to moisture problems in buildings using a probabilistic limit state approach.An example of a risk analysis of mould germination on the inner surface of a wooden roof panel in a cold attic is calculated using the proposed methodology. The surface's relative humidity (given certain surface temperature interval) is chosen as a performance aspect. The performance criteria for mould germination on wood are also treated as a random variables. The probability of mould germination is evaluated for different attic floor constructions in which changes to the construction were introduced on the material or component level. The application of the probabilistic model of mould germination makes comparisons of alternative cold attic constructions possible. Uncertainties coupled to the proposed methodology are discussed.