Hygrothermal and durability performance of building envelopes in the face of climate change

建筑围护结构将室内与室外环境分开，主要目的是通过控制热量、空气、蒸汽和液体流动，为居民创造舒适健康的室内气候。为了实现可持续性和长寿命，改造和新建筑围护结构解决方案的设计面临的新挑战是在建筑围护结构的湿热和耐久性评估中考虑未来的室外环境条件，包括气候变化。虽然全球气候变化数据存在不同的时间跨度和地点，未来的地方气候仍然是未知的。必须评估当地气候变化对建筑物外壳造成影响的程度和相关风险。 本研究计划的总体目标是量化气候变化对建筑围护结构湿热和耐久性能的影响，并确定应对和缓解这些影响的措施。因此，建立一套反映不同气候情景下当地城市未来气候的气候档案，为建筑围护结构性能评估提供充分的边界条件，是一个及时的选择。该计划的范围包括开发适当的方法，巩固物理模型，并提出工程工具，允许适当的设计和确保建筑围护结构的长期性能，其中使用概率方法考虑不确定性。 具体而言，本研究计划将产生：1。确定未来当地气候的方法，并确定加拿大三个气候带目前和未来的边界条件。在当前和未来气候条件下，建筑围护结构的湿热性能和复杂结构的损伤模型的整合。评估气候变化对加拿大三个地点的三个现有建筑围护结构造成的风险，以及4。根据应对气候变化的需要，开发具有弹性的新的或改进的建筑围护结构组件。该计划承担了在气候变化的背景下设计翻新和新建筑围护结构的挑战。然后将设计对建筑物外壳的影响的风险。社会面临着建筑环境的严峻挑战，需要能够为建筑围护结构提出现实和工程解决方案的工程师。该计划将培养高素质的人才，在建筑围护结构性能的先进建模和评估气候变化带来的不确定性和风险方面具有独特的专业知识。这种类型的专业知识受到加拿大各地建筑工程公司的大力追捧。

The building envelope separates the indoor from the outdoor environment, primarily aiming to create a comfortable and healthy indoor climate for its inhabitants, mainly via control of the heat, air, vapor and liquid flows. Aiming for sustainability and long lifetime, a new challenge for the design of retrofitted and new building envelope solutions is to take into account future outdoor environmental conditions including climate change in the hygrothermal and durability assessment of building envelope. Although global climate change data exist for different timespans and locations, future local climates remain largely unknown. The magnitude and the related risks of the impacts on the building envelope posed by local climate change must be assessed. The general objective of this research program is to quantify the impact of climate change on the hygrothermal and durability performance of building envelopes and to identify coping and mitigation measures for these impacts. It is timely to develop a set of future climate files reflecting the local urban under different climate scenarios in order to provide the adequate boundary conditions for building envelope performance assessment. The scope of the program includes developing an adequate methodology, consolidating the physical models and proposing engineering tools allowing adequate design and ensuring long-term performance of building envelopes, where uncertainty is considered using a probabilistic approach. Specifically, this research program will yield: 1. A methodology for determining the future local climate and the determination of such present and future boundary conditions for three climatic zones in Canada, 2. A consolidation of building envelope hygrothermal behavior and damage modeling for complex configuration under present and future climate, 3. An assessment of the risks posed by climate change on three existing building envelopes for three Canadian locations, and 4. The development of resilient, new or improved, building envelope assemblies as required to face climate change. This program takes up the challenge of designing retrofitted and new building envelopes in the context of climate change. The risks of the impacts on the building envelope will then be devised. Society faces a critical challenge on its built environment and needs engineers that can propose realistic and engineered solutions for the building envelope. This program will train highly qualified personnel with a unique expertise in advanced modeling of building envelope performance and in evaluating uncertainties and risks posed by climate change. This type of expertise is heavily sought after by building engineering firms throughout Canada.