Analysis on Bearing Capacity of Concrete-Filled Tubular CFRP-Steel Stub Column under Axle Compression

Abstract:

New progress of research and applications of CFRP at home and abroad are introduced in this paper. The circular concrete-filled tubular CFRP-steel stub column under axial loads is studied based on the unified strength theory in the paper. The effect of intermediate principal stress on the ultimate strength for the concrete-filled tubular CFRP-steel stub column have been investigated. The ultimate load calculation formula for the concrete-filled tubular CFRP-steel stub column is derived in this paper, and can be simplified for cases without CFRP. Compared with the solution obtained in this paper and the experimental results, the good agreement can be found. The effects of the intermediate shear stress, the cross-section deformation ratio and also the inner friction angle of the concrete are all considered in the theory analysis. The analysis result further tests the applicability of the unified strength theory in the field of concrete-filled CFRP-steel tube. It has an important theory value for engineering application.

• Periodical: Applied Mechanics and Materials (Volumes 584-586)
• Pages: 1155-1160
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.584-586.1155
• Online since: July 2014
• Authors: Rong Zhou, Jun Hai Zhao, Xue Ying Wei
• Keywords: Axle Compression, CFRP-Steel Tube, Strengthening, Structure Engineering, Unified Strength Theory

References

[1] Shaohuai Cai. Modern steel tube confined concretestructures [ M] . Beijing: Communications Press, 2003 in Chinese.

[2] Wei Gu. Investigation on the concrete filled circular CFRP-steel Column structures [D] . Dalian. Dalian Maritime University. 2007. in Chinese.

[3] Mao-Hong Yu. Unified Strength Theory and Its Applications[M]. Berlin：Springer Press，2004. 134~136. in Chinese.

[4] Tao Zhong, Linhai Han and Jinping Zhuang. Using CFRP to strengthen concrete-filled steel tubular columns: stub column tests[ C] / Proceeding of the 4th International Conference on Advances in Steel Structures. England: Elsevier Science LTD, 2005: 701- 706 in Chinese.

DOI: 10.1016/b978-008044637-0/50103-7

[5] ZHAO Junhai. Unified Strength Theory and Its Application [M] . Beijing : Science Press，2003. 87~91. in Chinese.

[6] Wei Gu, Yinghua Zhao, Dongwei Shang. Load carrying capacity of concrete filled CFRP-steel tubes under axial compression [J] . Engineering Mechanics, 2006, 23 (1) : 149 - 153 in Chinese.

[7] Changguang Zhang, Junhai Zhao, Hongbo Feng. Investigation on the load capacity of concrete filled CFRPsteel tube stub columns under axial compression [J] . Journal of Harbin Institute of Technology, 2007, 39 ( S2) : 82- 85 in Chinese.

[8] Qingli Wang, Wei Gu, Yinghua Zhao. An experimental study on concentrically compressed concrete filled circular CFRP- steel composite tubular stub columns [J] . China Civil Engineering Journal, 2005, 38( 10) : 44- 48 in Chinese.

DOI: 10.1016/b978-008044637-0/50098-6