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| Vol. - No. | Vol.7 - No.4 |
|---|---|
| Date | Dec., 2018 |
| Title | Flammability and Multi-objective Performance of Building Façades: Towards Optimum Design |
| Author | Matthew Bonner and Guillermo Rein+ |
| Institutions | Department of Mechanical Engineering, Imperial College London, SW7 2AZ, UK |
| Abstract |
The façade is an important, complex, and costly part of a building, performing multiple objectives of value to the occupants, like protecting from wind, rain, sunlight, heat, cold, and sound. But the frequency of façade fires in large buildings is alarming, and has multiplied by seven times worldwide over the last three decades, to a current rate of 4.8 fires per year. High-performing polymer based materials allow for a significant improvement across several objectives of a facade (e.g., thermal insulation, weight, and construction time) thereby increasing the quality of a building. However, all polymers are flammable to some degree. If this safety problem is to be tackled effectively, then it is essential to understand how different materials, and the façade as a whole, perform in the event of a fire. This paper discusses the drivers for flammability in facades, the interaction of facade materials, and current gaps in knowledge. In doing so, it aims to provide an introduction to the field of façade fires, and to show that because of the drive for thermal efficiency and sustainability, façade systems have become more complex over time, and they have also become more flammable. We discuss the importance of quantifying the flammability of different façade systems, but highlight that it is currently impossible to do so, which hinders research progress. We finish by putting forward an integral framework of design that uses multi-objective optimization to ensure that flammability is minimized while considering other objectives, such as maximizing thermal performance or minimizing weight. |
| Keyword | Façade, Fire, High-rise building, Cladding, Design |
| PP. | PP.363~374 |
| Paper File |
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