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Assessment of risk of freeze-thaw damage in internally insulated masonry in a changing climate

机译：在不断变化的气候中，评估内部绝缘砌体中的冻融损伤风险

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摘要

Buildings are susceptible to gradual changes in climate and to extreme events. The scale and severity of climate change are expected to be spatially heterogeneous. There is a necessity to consider changing climate in the operation and maintenance of buildings, as buildings have a long-term service life. In this study, the impact of climate change on the risk of freeze-thaw damage for internally insulated masonry wall in two regions in Switzerland (Zurich and Davos) for two future periods is investigated. A hygrothermal model that considers coupled moisture and heat transport in freezing and non-freezing building materials is used. The risk of freeze-thaw damage is evaluated with an indicator, called the FTDR Index. Climate projections under A1B and A2 emission scenarios from ten different climate model chains are chosen to cover a wide range of possible future climates. The risk of freeze-thaw damage at Zurich is relatively high in the reference period. An increase in air temperature in the cold period that leads to less freeze-thaw cycles is the main reason for the lower risk of freeze-thaw damage in the future periods. By comparison, the risk of freeze-thaw damage at Davos is low in the reference period. An increase in temperature and precipitation in the cold period is the main reason for the higher risk of freeze-thaw damage in the future periods at Davos. In the face of climate change, the future requirement on frost resistance of building materials and components at Davos should take the future climate loading into account.
机译：建筑物易于逐步改变气候和极端事件。预计气候变化的规模和严重程度将在空间上是异质的。随着建筑物的长期使用寿命，有必要考虑改变气候的运营和维护。在这项研究中，调查了瑞士（苏黎世和达沃斯）两个地区内部绝缘砌体墙体对瑞士（苏黎世和达沃斯）的冻融损伤风险的影响，为期两个未来期间。使用一种湿热模型，用于在冷冻和非冷冻建筑材料中进行耦合的水分和热传输。使用称为FTDR指数的指示符评估冻融损坏的风险。选择了10个不同气候模型链的A1B和A2发射方案下的气候预测，以涵盖各种可能的未来气候。苏黎世冻融损伤的风险在参考期间相对较高。导致冻融循环不太少的冷时期的空气温度增加是未来冻融损伤风险较低的主要原因。相比之下，参考期间达沃斯冻融损坏的风险低。寒冷时期的温度和降水量的增加是达沃斯未来冻融损坏风险较高的主要原因。面对气候变化，未来建筑材料和达沃斯成分的冰霜抵抗要求应考虑未来的气候载荷。

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