Study on Mechanism of L-Shaped Concrete-Filled Steel Tubular Columns Subjected to Axial Compression

Abstract:

In this paper, a constitutive relationship of the concrete core restrained by L-Shaped steel tube is put forward based on referring to the constitutive relations of core concrete in concrete-filled square steel tube columns, which takes the restraint of steel tube to concrete as an equivalent confinable effect coefficient . Load-deformation relationship of L-Shaped concrete-filled steel tubular column subjected to axial compression is analyzed by finite element analysis (using ABAQUS software). The predicted load versus deformation relationship cures are in good agreement with those of tests based on the finite element analysis, loads carried by steel tubes and concrete respectively during the loading process, as well as interactions between them are analyzed. Finally, influences of length-width ratio and width-thickness ratio on the interaction between steel tubes and concrete are investigated.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 2463-2468
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.2463
• Online since: February 2012
• Authors: Ji Cheng Zhang, Jun Yang
• Keywords: Axial Compression, Finite Element Method Mechanism, L-Shaped Concrete-Filled Steel Tubular Column

References

[1] Han Linhai. (2000) Concrete-filled steel tubular structure, Beijing: Science Press, China.

[2] LI Zhijun, CAI Jian, TAN Zhedong, CHEN Mingde.(2001) Experimental research on mechanical performance of concrete-filled special-shaped steel tube columns with binding bars, Engineering Mechanics, 16:A02，124-129. (in Chinese)

[3] Cai Jian,Sun Gang, Experimental investigation on L-shaped concrete-filled steel tube stub columns with binding bars under axial load, Civil Engineering Journal, 2008，41(9):14-20. (in Chinese)

[4] DU Guo-feng, XU Li-hua,XU Hao-ran,WEN Fang, Study on behavior of composite T-shaped concrete filled steel tubular short columns under axial compression, Journal of Xi an University of Architecture & Technology(Natural Science Edition), 2008(04),549-555. (in Chinese)

[5] CHEN Zhiyi.(2003) Experimental research and theoretical analysis about construction techniques of concrete-filled rectangular steel tube (CFRT) columns and axial bearing capacity of concrete-filled special-shaped steel tube stub, Shanghai: Tongji University. China

DOI: 10.18057/ijasc.2018.14.3.11

[6] Liu Wei.(2005) Research on Mechanism of Concrete-Filled Steel Tubes Subjected to Local Compression, Fuzhou: Fuzhou University, China.

[7] Zhang Zhengguo.(1989) Research on Basic Behaviour of Concrete Filled Square Steel Tubular Stub under Eccentric Load, Journal of Building Structures, 06, 10-20.(in Chinese)

[8] Zhang Zhengguo, Huo Da.(1986) The Research on the Basic Behaviour of Concrete under the Non-uniform Lateral Restraint,International Symposium on Fundamental Theory of Reinforced and Prestressed Concrete，Naning, China，111-117.

[9] Li Xueping.(2004) Research on Mechanism of Concrete-filled Square Steel Tubular Column and Application Technology of the Node, Shanghai: Tongji University, China.

[10] Li Xueping LU Xilin Guo Shaochun.(2005) Seismic behavior of CFRT column under cyclic loading Ⅱ:analytical study, Earthquake Engineering and Engineering Vibration, 25:05, 104-111.(in Chinese)