Experimental Research and FE Model Analysis of Uniaxial Compression Ultimate Bearing Capacity on Concrete Filled Steel Tubular Columns

Abstract:

Based on a prototype of a Concrete Filled Steel Tubular(CFST) column (D=1.2m, t=24mm) used in a practical engineering, specimens length-diameter ratio of which is 3:1 are designed to conduct the uniaxial compression experiment according to three scales which are 1:2.4, 1:3.6 and 1:4.8. FE model is established to simulate the loading process by means of finite element software ABAQUS. The study shows that the bearing capacity of test is much higher than the value calculated according to codes. It’s about 7% higher than the design bearing capacity calculated according to code CECE28:90. The outer steel tubes of CFST columns used in engineering are generally processed by wrapping and welding. The welding zone is easily to yield firstly when the CFST columns are under uniaxial compression, which can change the compression bearing state of the cross section to bias compression. As a result, the bearing capacity of the CFST columns would decrease to some extend.

• Periodical: Applied Mechanics and Materials (Volumes 94-96)
• Pages: 431-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.94-96.431
• Online since: September 2011
• Authors: Yan Jiang Chen, Yong Li, Wei Ming Yan, Da Xing Zhou
• Keywords: Bearing Capacity, Concrete Filled Steel Tubular Column, Destruction, FE-Model, Simulation, Test, Uniaxial Compression

References

[1] Cai Shaohuai: Modern Steel Tube Confined Concrete Structure (China communications press, Beijing 2003).

[2] Zhong Shantong: Structures of Concrete-filled Steel Tube (Tsinghua University Press, Beijing 2003).

[3] Han Linhai: Structures of Concrete-filled Steel Tube Columns (Science Press, Beijing 2007).

[4] Huang C S, Yeh Y K: J. Struct. Eng. Vol. 128(9): 1222~1230. (2002).

[5] Schneider S P: J. Struct. Eng. Vol. 124(10): 1125~1138. (1998)

[6] Zhao Junhai, Gu Qiang, Ma Shufang: Engineering Mechanics. Vol. 19(2): 32~35. (2002) (in Chinese)

[7] Hsuan T H, ASCE M, Huang C S: J. Struct. Eng. Vol. 129(10): 1329~1332. (2003)

[8] Lu Fangwei, Li Siping, Sun Guojun: Engineering Mechanics. Vol. 24(3): 110~114. (2007) (in Chinese)

[9] ABAQUS Inc. ABAQUS Theory Manual and User Manuals, Version 6.5. Providence, R.I.: ABAQUS Inc. (2004)

[10] Huang Chao, Han Xiaolei, Ji Jing: Journal of Building Structures. Supplementary Issue 1: 187~190. (2009) (in Chinese)