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The mitigation of the progressive collapse of a 9-storey structure incorporating United States Department of Defence guidelines

机译：结合美国国防部准则的9层建筑逐渐倒塌的缓解措施

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Many failures such as those due to blast, impact, wind pressure and earthquakes can be caused by the progressive collapse in structures. This paper will discuss different mitigation methods for progressive collapse corresponding numerical analysis for a 9-storey reinforced concrete structure by SAP2000 following severe initial damage. After removing specified critical columns the demand capacity ratio (DCR) of the members will be measured by the latest revision of Department of Defence of the United States (DOD) guideline, which is one of the most complete sets of criteria in terms of providing useful guidance to the designers in 2013. The structure has a potential of progressive collapse if DCR is more than 2 for symmetrical structure. Two approaches will be presented to diminish the potential of progressive collapse in the structures. They are adequate increase in the size of structural elements throughout the structure and establishing of bracing system at the top level. To gain the best method among all that have been presented for the mitigation of progressive collapse, providing Bracing at the top level is the most effective and economical method.
机译：结构的逐步倒塌可能导致许多故障，例如由于爆炸，冲击，风压和地震造成的那些故障。本文将讨论9层钢筋混凝土结构在遭受严重的初始破坏后的渐进倒塌相应数值分析的不同缓解方法。删除指定的关键列后，成员的需求容量比率（DCR）将通过美国国防部（DOD）指南的最新修订版进行衡量，这是在提供有用信息方面最完整的标准之一在2013年向设计人员提供指导。如果对称结构的DCR大于2，则该结构可能会逐渐塌陷。将提出两种方法来减少结构中逐渐倒塌的可能性。它们充分增加了整个结构中结构元件的大小，并在顶层建立了支撑系统。为了获得目前所提出的缓解渐进性倒塌的最佳方法，在顶层提供支撑是最有效，最经济的方法。

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