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Understanding Low-Sloped Roofs Under Hurricane Charley From Field to Practice

机译：从野外到实践了解飓风查利下的低坡屋顶

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摘要

Natural wind hazard damages have been dramatic in recent years, incurring losses of life and property around the world. Wind-induced failure is one of the major contributors to insurance claims, and it is rising. To address these growing concerns, RICOWI (Roofing Industry Committee on Weather Issues) started a Wind Investigation Program (WIP) to Investigate the field performance of roofing assemblies after major windstorm events and to factually describe roof assembly performance and modes of damage. As part of this program, Hurricane Charley, which hit Punta Gorda, FL, with winds exceeding 140 mph (63 m/s), was investigated. This paper mainly focuses on the field performance of the low-sloped roofs with three important parameters that were found critical in the failure of the roofing systems, namely, 1. Effect of corner wind suction, 2. Effect of parapet, 3. Effect of internal pressure. For each scenario, first scientific documentation was presented, and then how the field observation reflects the fundamental principles were discussed. Based on this exercise, correlations are developed for roof wind design. In addition, wind design data from the North American codes of practice are also calculated and compared to show the impact of science and field observation on durable roof design. With these illustrations, this paper offers recommendations to advance the roof system design for hurricane-prone regions.
机译：近年来，自然风灾造成的破坏非常严重，导致全世界生命和财产损失。风引起的故障是保险索赔的主要因素之一，并且还在上升。为了解决这些日益严重的问题，RICOWI（天气问题屋面行业委员会）启动了一项风能调查计划（WIP），以调查重大风暴事件后屋面组件的现场性能，并真实地描述屋面组件的性能和损坏方式。作为该计划的一部分，对风速超过140英里/小时（63 m / s）袭击佛罗里达州蓬塔戈尔达的查理飓风进行了调查。本文主要关注低坡屋顶的现场性能，其中三个重要参数对屋面系统的失效至关重要：1.角风吸力的影响，2.护墙的影响，3。内部压力。对于每种情况，首先介绍了科学文献，然后讨论了现场观察如何反映基本原理。基于此练习，开发了屋顶风设计的相关性。此外，还计算并比较了来自北美实践准则的风力设计数据，以显示科学和现场观察对耐用屋顶设计的影响。借助这些插图，本文为推进飓风高发地区的屋顶系统设计提供了建议。

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