Dynamic Increase Factors for progressive collapse anaylsis of steel structures accounting for column buckling
Dynamic Increase Factors for progressive collapse anaylsis of steel structures accounting for column buckling
复制标题
考虑柱屈曲的钢结构渐进倒塌分析的动态增加因子
DOI：
10.1002/cepa.2387
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Possidente L
中科院分区：
文献类型：
--
作者：
Possidente L
人为危险，如火灾、爆炸或撞击，可能导致结构的连续倒塌，其中局部失效从单个受影响的结构部件扩散到结构的其他部分。模拟连续倒塌的一种典型方法是考虑动态增加因子（DIF）进行静态柱移除分析，动态增加因子的确定对于解释与突然柱损失情景相关的动态效应至关重要。目前关于该系数定义的建议主要考虑非线性分析中的梁型倒塌，尽管有不同的机制，例如，柱屈曲，可以控制连续倒塌事件。本文介绍了通过一个数值程序的五个钢结构的DIF的确定与层数增加。对整体和局部缺陷进行建模，以考虑结构的几何非线性和柱屈曲。DIF值是考虑两种不同的工程需求参数（EDP）获得的，分别适用于描述梁型和柱型机构。评价的DIF进行比较，在当前的UFC设计处方中推荐的连续倒塌的值，并考虑选择适当的DIF值。
Man‐made hazards, such as fire, explosions, or impacts, may induce the progressive collapse of structures, in which the localised failure spreads from the single affected structural component to other parts of the structure. A typical approach to model progressive collapse consists in performing static column removal analyses considering a Dynamic Increase Factor (DIF), whose determination becomes paramount to account for the dynamic effects related to a sudden column loss scenario. Current recommendations on the definition of such factor mainly consider a beam‐type collapse in non‐linear analyses, though different mechanisms,e.g., column buckling, may govern progressive collapse events. This paper presents the determination of the DIFs through a numerical procedure for five steel structures with an increasing number of storeys. Both global and local imperfections are modeled to account for the geometric non‐linearities of the structure and column buckling. DIF values are obtained considering two different Engineering Demand Parameters (EDPs), suited for describing beam‐type and column‐type mechanisms respectively. The evaluated DIFs are compared with the values recommended in the current UFC design prescriptions for progressive collapse, and considerations on the choice of the appropriate DIF values are provided.
影响因子：
5.5
作者：
J. Castro;A. Elghazouli;B. Izzuddin
通讯作者：
J. Castro;A. Elghazouli;B. Izzuddin
DOI：
10.1061/41016(314)98
发表时间：
2008-10
期刊：
--
影响因子：
--
作者：
D. Stevens;B. Crowder;B. Hall;K. Marchand
通讯作者：
D. Stevens;B. Crowder;B. Hall;K. Marchand
通信机器人模型设计
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Hideki Kozima;Yuriko Yasuda;Cocoro Nakagawa;Hideki Kozima;小嶋 秀樹;小嶋 秀樹;小嶋 秀樹
通讯作者：
小嶋 秀樹