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Behavior of partially damaged concretefilled double skin tubular stub columns under fire
The Concrete-Filled Double Skin Tubular (CFDST) sections are known as a type of steel-concrete composite members consisting of outer and inner steel skins while the gap between steel skins is filled by concrete. This composite member has gained popularity in infrastructure construction, e.g. piers and columns, due to several advantages including but not limited to high load carrying capacity, high energy absorption due to deformation of inner steel tube, high local stability due to interaction between steel and concrete, and great performance under fire. It has been identified, however, that there exists limited information regarding the behavior of CFDST columns under accidental conditions involving the combined effects of initial damage followed by fire exposure. Therefore, this paper addresses a series of experimental tests conducted on circular CFDST stub columns fabricated from Self-Compacting Concrete (SCC) and Grade 350 structural mild steel. Specimens are subjected to four discrete tests; quasi-static compression to failure at ambient temperature, and low-, medium- and high-damage tests caused by quasi-static loading at room temperature followed by fire in a gas furnace. The results of experiments give an insight into the relationship between varying level of prior partial damage and the respective reduction in member capacity under fire conditions.
Behavior of partially damaged concretefilled double skin tubular stub columns under fire
The Concrete-Filled Double Skin Tubular (CFDST) sections are known as a type of steel-concrete composite members consisting of outer and inner steel skins while the gap between steel skins is filled by concrete. This composite member has gained popularity in infrastructure construction, e.g. piers and columns, due to several advantages including but not limited to high load carrying capacity, high energy absorption due to deformation of inner steel tube, high local stability due to interaction between steel and concrete, and great performance under fire. It has been identified, however, that there exists limited information regarding the behavior of CFDST columns under accidental conditions involving the combined effects of initial damage followed by fire exposure. Therefore, this paper addresses a series of experimental tests conducted on circular CFDST stub columns fabricated from Self-Compacting Concrete (SCC) and Grade 350 structural mild steel. Specimens are subjected to four discrete tests; quasi-static compression to failure at ambient temperature, and low-, medium- and high-damage tests caused by quasi-static loading at room temperature followed by fire in a gas furnace. The results of experiments give an insight into the relationship between varying level of prior partial damage and the respective reduction in member capacity under fire conditions.
Behavior of partially damaged concretefilled double skin tubular stub columns under fire
Heidarpour, Amin (author) / Zhao, Xiao-Ling (author)
2019-01-01
Heidarpour , A & Zhao , X-L 2019 , Behavior of partially damaged concretefilled double skin tubular stub columns under fire . in Proceedings of the 17th International Symposium on Tubular Structures(ISTS17) . Research Publishing (S) Pte. Ltd. , International Symposium on Tubular Structures 2019 , Singapore , 9/12/19 . https://doi.org/10.3850/978-981-11-0745-0_047-cd
Article (Journal)
Electronic Resource
English
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