Limit State Design for Biodeterioration of Building Materials

建筑材料生物劣化的极限状态设计

• 批准号: 536584-2019
• 负责人: Mukhopadhyaya, Phalguni
• 金额: $ 2.08万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=682985
• 关键词: Limit; State; Design; Biodeterioration; Building

Biodeterioration of building materials due to poor hygrothermal (i.e. heat-air-moisture) conditions is a major concern for the sustainability of buildings and the health and safety of occupants. The risks of biodeterioration are accentuated in highly energy efficient buildings requiring further design considerations. Researchers across the world have tried to characterize this issue through a combination of field experience, modelling, and controlled laboratory investigations. However, integration of these research outputs in building enclosure design process is an unfinished agenda, partly due to the lack of coordination between engineering researchers, building enclosure designers, and biologists. The proposed research aims to synthesize engineering concepts of limit state design with biodeterioration concepts derived from wood science and mycology. Conceptually, the limit state design approach involves a serviceability failure state (surface mould growth), and an ultimate limit state failure state (decay, leading to imminent life-safety risks).

建筑材料因湿热（即热-空气-水分）条件差而发生生物退化，是建筑物可持续性和居住者健康与安全的一个主要问题。在需要进一步设计考虑的高能效建筑物中，生物退化的风险更加突出。世界各地的研究人员试图通过结合实地经验、建模和受控实验室调查来描述这一问题。然而，这些研究成果在建筑围护结构设计过程中的整合是一个未完成的议程，部分原因是工程研究人员，建筑围护结构设计师和生物学家之间缺乏协调。建议的研究旨在综合工程极限状态设计的概念与生物退化的概念，来自木材科学和真菌学。从概念上讲，极限状态设计方法包括一个正常使用失效状态（表面霉菌生长）和一个最终极限状态失效状态（腐烂，导致迫在眉睫的生命安全风险）。