渐进崩塌
复合数
结构工程
抗性(生态学)
耐火性
材料科学
复合材料
岩土工程
地质学
法律工程学
工程类
钢筋混凝土
生态学
生物
作者
Yasser Alashker,Sherif El-Tawil,Fahim Sadek
出处
期刊:Journal of Structural Engineering-asce
[American Society of Civil Engineers]
日期:2010-04-10
卷期号:136 (10): 1187-1196
被引量:128
标识
DOI:10.1061/(asce)st.1943-541x.0000230
摘要
This paper discusses the progressive collapse resistance of steel-concrete composite floors in which steel beams are attached to columns through shear tabs. This is a common type of system used for the gravity bay portions of steel buildings. The study is conducted using computational simulation models validated through extensive comparisons to disparate test data. The models are used to investigate key parameters influencing the robustness of generic composite floors subjected to the removal of a center column. In particular, the effects of deck thickness, steel reinforcement, and the numbers of bolts in the shear tab connection on the behavior of the system are studied as a function of the loading scheme. The simulation results show that the majority of collapse resistance comes from the steel deck and that, for the system considered, increasing connection strength by adding more bolts might not be that beneficial in increasing overall collapse strength. The dynamic impact factor, which is widely used to account for dynamic effects within a static design framework, is also computed and the DIF value recommended in existing design guidelines is evaluated.
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