Analysis on Bearing Capacity of Solid Multibarrel Tube-Confined Concrete Short Columns (CHS Inner and SHS Outer) under Axial Compressive Load

Abstract:

By introducing the reduction coefficient of concrete strength and the equivalent restriction reduction coefficient,the non-uniform confinement force of square steel tube to its core concrete is turned to that of equivalent circular steel tube. Then the ultimate load calculation formula for the solid multibarrel tube-confined concrete short columns (CHS inner and SHS outer) is derived based on the Unified Strength Theory(UST),in which the double restriction effect and the decrease of longitudinal stress because of the hoop tensile tension are considered. The influence of intermediate principal stress on the ultimate load is studied and the failure mechanism is discussed. The applicability of the formulas is testified and the results show that the formulas have significance in exerting material potential.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 151-156
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.151
• Online since: May 2011
• Authors: Zhao Qiang Zhang, Yong Yao
• Keywords: Axial Compressive Load, Bearing Capacity, Equivalent Principle, Multibarrel Tube-Confined Concrete, Unified Strength Theory

References

[1] CAI Shao-huai,JIAO Zhan-shuan. Behavior and Ultimate Load Analysis of Multibarrel Tube-confined Concrete Columns. Journal of Building Structures,1997,18(6):20-25.

[2] ZHANG Chun-mei,YIN Yi,ZHOU Yun. Experiment Study on The Axial Load-bearing Capacity of High-strength Concrete-filled Double Tube Elements. Journal of Guangzhou University (Natural Science Edition ),2004,3(1):61-65.

[3] ZHANG Chun-mei,YIN Yi,ZHOU Yun. Analysis of Factors Influencing Axial Compressive Bearing Capacity of Concrete-filled Steel Tube Column. Industrial Construction,2004, 34(10): 66-68.

[4] ZHANG Chun-mei,ZHOU Yun,YIN Yi. Experimental Contrast Studies on Axial Compressive Behaviors of Steel-concrete Composite Columns. Acta Scientiarum Naturalium Universitatis Sunyatseni,2004,43(2):46-49.

[5] JIANG Han,ZUO Jiang,CHENG Wenrang. Experimental Study of Concrete-Filled Double Steel Tubular Short Columns Subjected to Axial Compression Load.Earthquake Resistant Engineering and Retrofitting, 2008,30(1):28-35.

[6] PEI Wan-ji. Research on Mechanical Performance of Multibarrel Tube-confined Concrete Columns. Xi'an: Chang'an University,2005.

[7] ZHANG Zhaoqiang,ZHAO Junhai,YAO Yong.Investigation on Bearing Capacity of Solid Multibarrel Tube-confined Concrete Columns(CHS inner and CHS outer)under Axial Compressive Load. Journal of Southwest University of Science and Technology,2008,23(1): 8-13.

DOI: 10.4028/www.scientific.net/amr.255-260.151

[8] Yu Maohong. New system of strength theory. Xi'an: Xi'an Jiaotong University Press,1992.

[9] WANG Jing,GUAN Gang,LI Siping.Calculation on the Axial Bearing Capacity of Concrete- Filled Square Steel Tube.Building Structure, 1997,(5):13-15.

[10] LI Xiaowei, ZHAO Junhai,ZHU Tiedong, etal.Mechanics Behavior of Axially Loaded Short Columns with Concrete-Filled Square Steel Tube.China Journal of Highway and Transport 2006,19(4):77-81.

[11] KENJI S,HIROYUKI N,SHOSUKE M,etal. Behavior of Centrally Loaded Concrete-Filled Steel-Tube Short Columns. Journal of Structural Engineering,2004,130(2):180-188.

DOI: 10.1061/(asce)0733-9445(2004)130:2(180)

[12] Zhao Junhai. Strength theory and its engineering application. Bei Jing: Science Press,2003.