Research purposes: The spiral has been developed for more than 100 years, but its form has always been relatively simple for circular columns. In this paper, compared with traditional single spiral and double spirals, the changes of the axial compression performances of the five-spiral short circular columns with the concrete strength and the volumetric stirrup ratio are studied. Compound restraint effect of the five-spiral on concrete is analyzed, and based on the theory of confined concrete, a calculation model for the axial compression bearing capacity of the five-spiral short column is proposed.
Research conclusions: (1) Compared with single spiral and double spirals, the short circular column with five-spiral has significantly larger axial compression bearing capacity and ultimate displacement. (2)The restraining effect of the five-spiral on the short circular column increases with the decrease of the concrete strength grade or the increase of the volumetric stirrup ratio. (3) The bearing capacity calculation model proposed in this paper has very small errors, which has certain reference significance for engineering practice.
Key words
five-spiral /
axial compression bearing capacity /
volumetric stirrup ratio /
Mander model
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 刘成清,涂志斌,施卫星,等. 汶川地震中混凝土框架柱破坏形式及快速加固[J]. 建筑结构,2011(S1):1201-1204.
Liu Chengqing, Tu Zhibin, Shi Weixing, etc. Study on Destructive Modes and Rapid Reinforcement of RC Frame Columns in Wenchuan Earthquake[J]. Building Structure,2011(S1):1201-1204.
[2] 尹衍樑,翁正强,王瑞祯,等. 预铸复合螺箍SRC柱之轴压行为研究[J]. 中国工程科学,2006(12):16-30.
Yin Yanliang, Weng Zhengqiang, Wang Ruizhen, etc. Axial Compressive Behavior of Precast SRC Columns with Multi-Spirals[J]. Engineering Science, 2006(12):16-30.
[3] 曹京源,卢德辉,唐雪梅,等. 五螺箍钢筋混凝土柱的力学性能试验研究[J]. 建筑施工,2019(10):1922-1926.
Cao Jingyuan, Lu Dehui, Tang Xuemei, etc. Experimental Study on Mechanical Properties of Five-screw Hoop Reinforced Concrete Column[J]. Building Construction, 2019(10):1922-1926.
[4] 过镇海,张秀琴,张达成,等. 混凝土应力-应变全曲线的试验研究[J]. 建筑结构学报,1982(1):1-12.
Guo Zhenhai, Zhang Xiuqin, Zhang Dacheng, etc. Experimental Investigation of the Complete Stress-strain Curve of Conerere[J]. Journal of Building Structures, 1982(1):1-12.
[5] 翁正强,尹衍樑,王瑞祯,等. 五螺箍矩形RC柱之轴压试验与优化设计研究[J]. 结构工程,2010(1):71-105.
Weng Zhengqiang, Yin Yanliang, Wang Ruizhen, etc. Experimental Studies of Reinforced Concrete Confined by Multi-Spiral Hoops[J]. Structural Engineering, 2010(1):71-105.
[6] Abdel-Halim M A H, Abu-Lebdeh T M. Analytical Study for Concrete Confinement in Tied Columns[J]. Journal of Structural Engineering, 1989(11):2810-2828.
[7] Samuel Yen-Liang Yin, Jui-Chen Wang, Ping-Hsiung Wang. Development of Multi-spiral Confinements in Rectangular Columns for Construction Automation[J]. Journal of the Chinese Institute of Engineers, 2012(3):309-320.
[8] Mander J B, Priestley M J N, Park R. Theoretical Stress-Strain Model for Confined Concrete[J]. Journal of Structural Engineering, 1988(8):1804-1826.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(1013 KB)
