While statistical data indicate that risk of progressive collapse in buildings is very low, loss of human life and severe injuries would be significant when a fully occupied multi-story building encounters partial or total failure. As a result of recent terrorist attacks on buildings throughout the world, particularly U.S. owned and occupied buildings, and recent natural hazards like Katrina Hurricane; several U.S. government agencies with large construction programs have developed their own design requirements (GSA 2003; DOD 2005) to provide resistance against progressive collapse. Each agency, however, with its own mission, has adopted different performance objectives for buildings subjected to abnormal loads. Foundation and geotechnical design considerations to provide resistance against progressive collapse are important components of the overall building performance under abnormal loadings. This work discusses the role of geotechnical and foundation system design considerations to reduce the likelihood of progressive collapse of buildings in the event of anomalous loadings. This includes outlining of acceptable risk approach to progressive collapse along with definitions of threats, events control, risk mitigation and practical recommendations for enhancing foundations resistance to progressive collapse.
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机译：尽管统计数据表明建筑物中逐渐倒塌的风险非常低，但是当一个完全有人居住的多层建筑物遇到部分或全部故障时，人员伤亡和严重伤害将是巨大的。由于最近恐怖袭击了全世界的建筑物，特别是美国拥有和占用的建筑物，以及最近的自然灾害，例如卡特里娜飓风;几个具有大型建设计划的美国政府机构已经制定了自己的设计要求（GSA 2003; DOD 2005），以抵抗逐渐的坍塌。但是，每个机构都有其自己的使命，对于承受异常负荷的建筑物采用了不同的性能目标。为抵抗逐渐倒塌提供抵抗力的地基和岩土设计考虑因素是异常荷载下整体建筑性能的重要组成部分。这项工作讨论了岩土工程和地基系统设计考虑因素的作用，以减少在异常荷载情况下建筑物逐渐倒塌的可能性。这包括概述可接受的渐进倒塌风险方法，以及威胁的定义，事件控制，风险缓解以及增强基金会抵抗渐进倒塌的实用建议。
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