Compression Performance of Seawater and Sea Sand Concrete Filled RPC Tube Composite Columns under Axial Load

被引：0
|
作者：
Shan B. [1 ,2 ]
Wang Z. [1 ]
Xiao Y. [3 ]
Lai D. [1 ]
机构：
[1] Key Laboratory of Building Safety and Energy Efficiency(Hunan University) of the Ministry of Education, Changsha
[2] Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, Changsha
[3] Zhejiang University-University of Illinois Institute, Zhejiang University, Haining
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2020年 / 47卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Column; Composite effect; Fiber reinforced polymer(FRP); Reactive powder concrete(RPC); Seawater and sea sand concrete;
D O I：
10.16339/j.cnki.hdxbzkb.2020.09.012
中图分类号：
学科分类号：
摘要：
An innovative composite structure, named seawater and sea sand concrete(SWSSC) filled reactive powder concrete(RPC) tube(SFRPCT), was presented in the paper. In the hybrid system, carbon fiber reinforced polymer(CFRP) hoops are arranged in prefabricated RPC tube and then SWSSC is cast in tube. From the material durability point of view, SFRPCT has excellent corrosion resistance and it can be potentially applied in marine construction. A total of 15 large-scale columns were conducted under axial compression test, including 12 SFRPCT specimens and 3 CFRP hoops confined SWSSC(FRPHSC) specimens. Composite effect between RPC tube and internal SWSSC and influence of mechanical properties from lateral confinement level were investigated in test. The results showed that only slight crack on RPC tube of SFRPCT column occurred without any spalling when axial load approached its peak value. Compressive strength and ductility of the SFRPCT columns were significantly higher than those of the corresponding FRPHSC specimen and increased with the increase of the volumetric hoop ratio in RPC tube. Therefore, SFRPCT hybrid system effectively combined the super-high strength of RPC and confinement effect by CFRP hoops. Based on existing test data and model, a calculation method for carrying capacity of SFRPCT was proposed. Contribution ratio of RPC tube for carrying capacity of SFRPCT columns was quantified and its value varied from 0.39 to 0.42. © 2020, Editorial Department of Journal of Hunan University. All right reserved.
引用
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页码：104 / 112
页数：8
相关论文
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