原文传递
Experimental Behavior of a Half-Scale Steel Concrete Composite Floor System Subjected To Column Removal Scenarios
| 题名： | Experimental Behavior of a Half-Scale Steel Concrete Composite Floor System Subjected To Column Removal Scenarios |
| 正文语种： | 英文 |
| 作者： | Eric S. Johnson, A.M.ASCE; Jeffrey E. Meissner, A.M.ASCE; Larry A. Fahnestock, P.E., M.ASCE |
| 作者单位： | Engineer, Weidlinger Associates, Inc;ARCO Murray National Construction Company;of Civil and Environmental Engineering, Univ, of Illinois at Urbana-Champaign, |
| 关键词： | Experimental Behavior of a Half-Scale Steel Concrete Composite Floor System Subjected To Column Removal Scenarios |
| 摘要： | A half-scale three-bay by three-bay steel-concrete composite floor system, which represented gravity framing for a typical commercial building, was studied experimentally to evaluate its structural integrity under four separate column removal scenarios: a comer column, two edge columns, and an interior column. In each test, the load was incrementally applied in the bays that were tributary to the removed column using water in containers that were placed on top of the slab. The tests demonstrated that gravity systems for commercial buildings have a significant level of structural integrity-compared to the load redistribution capability expected for steel framing with simple shear connections一even without specific design against progressive collapse. In the comer and edge column removal scenarios, 2.9 kPa (60 psf) and 4.0 kPa (83 psf) were sustained, respectively, and these loads represent a range of 50-75% of the expected floor load. The interior column removal scenario had an unexpectedly low capacity of 3.2 kPa (67 psf), but the behavior was heavily affected by damage to the test specimen due to the previous edge column removal scenarios. For this interior column removal scenario, the lack of slab continuity at the interior edges of the loaded bays prevented composite action and load redistribution occurred primarily through tension ties. Although tension tie development was observed in this experimental program, composite flexural response also had an important contribution to load redistribution for the corner and edge column removal scenarios. Despite the load redistribution seen in these tests, the observed capacities are below the extreme event load combination that is commonly used when designing to prevent progressive collapse, so the current design practice for steel gravity framing is likely not sufficient to meet this criterion. DOI: 10.106l/(ASCE)ST.1943-541X.0001398. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.02 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.02 |
| 页码： | 04015133 |
相关文献
- Vertical Progressive Collapse of Composite Floor Systems under a Side Column Removal Scenario: Experimental and Numerical Investigations
- Experimental and Analytical Study on Progressive Collapse of 3D Composite Floor System under Corner Column Loss
- Rigid-Plastic Model for Progressive Collapse Assessment of Composite Beam-Column Connection Subassembly under Internal Column Removal
- Large-Scale Experimental Tests of Composite Steel Floor Systems Subjected to Column Loss Scenarios
- Application of Experimental Results to Computational Evaluation of Structural Integrity of Steel Gravity Framing Systems with Composite Slabs
- This paper examines the structural response of cold-formed steel-framed building lateral force-resisting systems under combinations of simulated earthquake and fire loading. Full-scale experiments with gypsum-sheet steel composite panel sheathed walls, oriented strand board sheathed walls, and steel strap braced walls are presented. Twenty-two test specimens are subjected sequentially to combinations of cyclic shear deformation and fires of varying intensity; some approximate temperatures in standard furnace tests, and most have characteristics of actual building fires. In select tests, the walls are predamaged to simulate fire following an earthquake. The results show a progressive decrease of postfire lateral load capacity with increasing fire intensity for all walls; however, each wall type exhibits varied sensitivity to the fire intensity as well as to predamage. By understanding the response of these structural systems in real fires, designers can better plan for situations in which multiple hazards, including fire, exist. DOI: 10.106l/(ASCE)ST.1943-541X.0002610. © 2020 American Society of Civil Engineers.
检索历史
应用推荐
