Experiment Study on Influence of Initial Stress in Concrete Filled Steel Tubular Latticed Columns under Axial Load

Abstract:

The testing of concrete filled steel tubular (CFST) latticed columns with initial stress had been conducted under axial load. The set-ups subjected to initial stress, the curves of load to deformation as well as the hooping effect were analyzed. The trial results indicate that the CFST columns with initial stress have smaller of combined stiffness and ultimate load-carrying capacity as compared with CFST columns without initial stress. Furthermore, the presence of initial stress will advance the coming of plastic phase, and contemporary, put off the appearances of hooping effect so that it cannot be sufficient exerted, which decrease the ultimate load-carrying capacity at all. Nevertheless, the mechanical behaviour of lacing tubes does not vary with the initial stress and all the lace tubes are stayed in the elastic phase during the testing.

• Periodical: Applied Mechanics and Materials (Volume 518)
• Pages: 170-177
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.518.170
• Online since: February 2014
• Authors: Fu Yun Huang*, Guan Yu, Bao Chun Chen, Jian Zhong Li
• Keywords: Axial Loading Experiment, Concrete Filled Steel Tubular, Initial Stress Degree, Latticed Column, Reduction Ratio, Ultimate Load-Carrying Capacity

References

[1] Baochun Chen. Concrete filled steel tubular arch bridge (the second edition) [M]. Beijing: People Transportation Press, 2007. (In Chinese).

[2] Zhijing Ou, Baochun Chen. Research on material modification factor for stability calculation of concrete filled steel tubular laced columns [J]. Journal of Building Structures, 2011, 32(9): 130-134. (In Chinese).

[3] Lizhong Jiang, Wangbao Zhou. A kind of steel tube concrete lattice column of ultimate bearing capacity of fast calculation method [J]. Journal of computational mechanics, 2010, 27(4): 677-681. (In Chinese).

[4] Fuyun Huang, Xinmeng Yu, Baochun Chen. The structural performance of axially loaded CFST columns under various loading conditions [J]. ASCE, Steel and Composite Structures, Vol. 13, No. 5 (2012) 451-471.

DOI: 10.12989/scs.2012.13.5.451

[5] Shuixing Zhou, Min Zhang, Xiaosong Wang. At the beginning of the steel pipe stress on the bearing capacity of CFST arch effect nonlinear analysis [J], Journal of computational mechanics, 2010, 27(2), 291-297. (In Chinese).

[6] Jihua Deng, Xudong Shao. Initial stress of the concrete filled steel tube arch rib section influence the ultimate bearing capacity of the finite element analysis [J]. Sino-foreign highway, 2007, 27(3): 104-109.

[7] Johansson M, Gylltoft K, Mechanical behavior of circular steel-concrete composite [J], Journal of Structural Engineering, ASCE, 2002, 128(8): 1073-1081.

DOI: 10.1061/(asce)0733-9445(2002)128:8(1073)

[8] LinHai Han, GuoHuang Yao. Behaviour of concrete-filled hollow structural steel (HSS) columns with pre-load on the steel tubes [J]. Journal of Constructional Steel Research, ASCE, 2003, 59(12): 1455-1475.

DOI: 10.1016/s0143-974x(03)00102-0

[9] Dexin Xiong, Xiaoxiong Zha. A numerical investigation on the behaviour of concrete-filled steel tubular columns under initial stresses [J]. Journal of Constructional Steel Research, ASCE, 2007, 63(5): 599–611.

DOI: 10.1016/j.jcsr.2006.07.002

[10] J.Y. Richard Liew, D.X. Xiong. Effect of preload on the axial capacity of concrete-filled composite columns [J]. Journal of Constructional Steel Research, ASCE, 2009, 65(3): 709-722.

DOI: 10.1016/j.jcsr.2008.03.023

[11] Jiangang Wei , Fuyun Huang , Baochun Chen. Initial stress of the concrete filled steel tube arch ultimate bearing capacity of single circular tube effects [J]. Engineering mechanics, 2010, (7): 103-112. (In Chinese).