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Future projected changes in moisture index over Canada

机译：未来加拿大水分指数的预计变化

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摘要

As a consequence of global warming, buildings in Canada and around the globe are expected to face unprecedented climate over their design lives. The Moisture Index (MI) is a climate-based indicator currently used in the National Building Code of Canada (NBCC) to guide the design of wall assemblies for acceptable durability performance. In this study, future changes in MI are calculated across Canada under 2 and 3.5 degrees C of future global warming. Results indicate that the coastal and great lakes regions of Canada will have increased MI, whereas prairies and northern regions will in the future have decreased values of MI. Furthermore, it is demonstrated that drastically different projected future MI changes can be obtained with different values of drying potential normalization factor, and it is suggested that this value is chosen by carefully analyzing the historical and future projected drying potential values. Finally, our analysis shows that wall assemblies at an increased number of reference locations given in the NBCC, importantly those falling in the densely populated south-western Ontario region, will need to be designed with additional safety measures such as a capillary break in the future for them to achieve satisfactory moisture performance over their design lives.
机译：由于全球变暖，加拿大和全球的建筑预计将面临前所未有的气候，而不是他们的设计生活。水分指数（MI）是目前用于加拿大国家建筑码（NBCC）的基于气候指标，以指导墙壁组件的设计以获得可接受的耐用性能。在这项研究中，MI的未来变化在未来全球变暖的2和3.5摄氏度下计算。结果表明，加拿大的沿海和大湖泊地区将增加MI，而大草原和北部地区将来会减少MI的价值。此外，证明了众所周知的不同预测的未来MI变化可以用不同的干燥潜在归一化因子的值获得，并且建议通过仔细分析历史和未来投影干燥潜在值来选择该值。最后，我们的分析表明，NBCC中给出的参考位置数量增加的墙壁组件，重要的是那些落入密集的安大略省地区的落下区域，需要采用额外的安全措施，例如未来的毛细管突破为他们实现了令人满意的水分性能。

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  • 来源
    《Building and Environment》 |2021年第7期|107923.1-107923.12|共12页
  • 作者

    Gaur Abhishek; Lu Henry; Lacasse Michael; Ge Hua; Hill Fiona;

  • 作者单位

    Natl Res Council Canada Construct Res Ctr 1200 Montreal Rd Ottawa ON K1A 0R6 Canada;

    Concordia Univ Dept Bldg Civil & Environm Engn 1455 Maisonneuve Blvd West Montreal PQ H3G 1M8 Canada;

    Natl Res Council Canada Construct Res Ctr 1200 Montreal Rd Ottawa ON K1A 0R6 Canada;

    Concordia Univ Dept Bldg Civil & Environm Engn 1455 Maisonneuve Blvd West Montreal PQ H3G 1M8 Canada;

    Natl Res Council Canada Construct Res Ctr 1200 Montreal Rd Ottawa ON K1A 0R6 Canada;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Climate change; Moisture index; Climate model; Building design;

    机译：气候变化;水分指数;气候模型;建筑设计;

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