Fire performance of edge and interior circular steel-reinforced concrete-filled steel tubular stub columns

IF 4 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Steel and Composite Structures Pub Date : 2021-01-01 DOI:10.12989/SCS.2021.41.1.115

Fanqin Meng, M. Zhu, G. Clifton, Kingsley U. Ukanwa, James B. P. Lim

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引用次数: 7

Abstract

The steel-reinforced concrete-filled steel tubular column (SRCFT) is a new form of composite columns. Before widely accepted in engineering practice, its fire behaviour shall be fully understood. Four representative circular SRCFT stub columns were built and tested to failure under ISO fire herein. The tests explored the effect of reinforced steel, the internal or external heating condition and load ratios. The experimental results indicated that the inserted section steel significantly improved the fire resistance of circular SRCFT columns. The non-uniform fire condition did not produce a detrimental effect on the fire response of the specimen. The numerical model was developed and validated against the experimental results. Then a parametric study was present to evaluate the effect of load level, eccentricity and heating conditions. A comparison was made to check the accuracy of a widely accepted design method. The comparison indicated the design method was generally 36% conservative for axially loaded condition and 25% un-conservative for eccentrically loaded condition.

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圆形钢管混凝土柱边缘和内部的防火性能

钢管混凝土柱是一种新型的组合柱形式。在广泛应用于工程实践之前，必须充分了解其防火性能。本文建立了四个具有代表性的圆形SRCFT短柱，并在ISO火灾下进行了失效测试。试验探讨了钢筋、内外加热条件和荷载比的影响。试验结果表明，插入型钢显著提高了钢管混凝土圆形柱的耐火性能。非均匀火灾条件对试样的火灾响应没有产生不利影响。建立了数值模型，并与实验结果进行了对比验证。然后进行了参数化研究，评价了负荷水平、偏心距和加热条件的影响。通过比较，验证了一种被广泛接受的设计方法的准确性。结果表明，设计方法在轴向加载条件下保守性为36%，在偏心加载条件下不保守性为25%。

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来源期刊

Steel and Composite Structures 工程技术-材料科学：复合

CiteScore

8.50

自引率

19.60%

发文量

审稿时长

7.5 months

期刊介绍： Steel & Composite Structures, An International Journal, provides and excellent publication channel which reports the up-to-date research developments in the steel structures and steel-concrete composite structures, and FRP plated structures from the international steel community. The research results reported in this journal address all the aspects of theoretical and experimental research, including Buckling/Stability, Fatigue/Fracture, Fire Performance, Connections, Frames/Bridges, Plates/Shells, Composite Structural Components, Hybrid Structures, Fabrication/Maintenance, Design Codes, Dynamics/Vibrations, Nonferrous Metal Structures, Non-metalic plates, Analytical Methods. The Journal specially wishes to bridge the gap between the theoretical developments and practical applications for the benefits of both academic researchers and practicing engineers. In this light, contributions from the practicing engineers are especially welcome.