A review on progressive collapse study for large-span space structures
A review on progressive collapse study for large-span space structures
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发表时间：
2013
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通讯作者：
Chen Yiyi
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作者：
Chen Yiyi
大跨度空间结构体系具有空间体积大、占地面积大等特点，在意外荷载作用下可能发生灾难性的连续倒塌，造成大量人员伤亡和重大损失，这就对大跨度空间结构连续倒塌的研究提出了更高的要求。本文根据文献报道和作者的研究工作，对大跨度结构连续倒塌的数值分析、试验和理论方法进行了综述，首先对连续倒塌进行了一般性的讨论，介绍了大跨结构倒塌分析中的关键技术，包括非连续位移场的确定、冲击接触分析等，以及多尺度计算方法及其在倒塌分析中的应用，并对大跨结构倒塌的试验研究进行了综述，提出了大跨度结构的位移测量、破坏起始、倒塌机理、结构鲁棒性评估和简化评估方法等关键技术建议。
Large-span spatial structural systems have huge space volume and cover large open areas,thus in the event of unexpected loading the spatial structures may develop catastrophic progressive collapse,causing a large number of casualties and substantial losses.This raises the demand for studies on collapse of large-span space structures.Up until now,most of the published papers concerning about the progressive collapse focused on frame structures,for which reliable design methods and corresponding codes have thus been established.This paper gives an overall review on numerical analysis,experimental,as well as theoretical methods for the structural progressive collapse of large-span structures based on papers published in the literature and the authors' research work.A general discussion on the progressive collapse was first presented,followed by key techniques that may be adopted in numerical simulation,including the determination of discontinuous displacement field,impact-contact analysis,etc.Multi-scale computational methods and their implementation into collapse analysis were also included.Experimental studies on collapse of large-span structures were reviewed,with recommendations on key techniques including displacement measurement and initiation of failure.Collapse mechanism,evaluation of structure robustness and simplified assessment methods on large-span structures were also covered.