Experimental and Numerical Study on Torsional Behavior of Precast Concrete Screw Pile Body

Abstract:

Precast concrete screw pile is a new kind of pile foundation. Because the pile bears very large torsion in construction, the torsional properties of pile body including cracking torsion, ultimate torsion and torsional deformation were studied in this paper in order to improve the anti-torsional ability of precast concrete screw pile. Experimental method and numerical method are used to research the torsional behavior of precast concrete pile body. Experimental and numerical results of cracking torsion, ultimate torsion and relationship between torsion and angle of twist per unit length of different specimens are obtained. In addition, five factors of strength level of concrete, degree of prestress, distance of spiral hoop, concrete cover and diameter of spiral hoop influencing on torsional behavior of precast concrete pile body are researched by orthogonal numerical test. The rational finite element model and solution method are concluded for calculating the torsional behavior of concrete pile. Moreover, the rational pile type and design parameters of precast concrete screw pile are obtained.

• Periodical: Applied Mechanics and Materials (Volume 188)
• Pages: 137-143
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.188.137
• Online since: June 2012
• Authors: Xin Li, Li Liang
• Keywords: Experimental Study, Numerical Simulation, Precast Screw Pile, Prestressed Concrete, Reinforced Concrete (RC), Torsional Behavior

References

[1] L. Liang, X. Li, Design and experiment on torsional behaviors of precast concrete pile body, J. Arch. & Civil Eng. 2 (2009) 87-91.

[2] M. Sun, Analysis of the feasibility of reinforced concrete screw pile, J. Tianjin Inst. Urban Const. 3 (2001) 187-190.

[3] T.W. Wang, Structural test of civil engineering, Wuhan Univ. of Tech. Press, Wuhan, 2003.

[4] Z.X. Li, Theory and technology of engineering structure test, Tianjin Univ. Press, Tianjin, 2004.

[5] A.H. Nilson, Nonlinear analysis of reinforced concrete by the finite element method, ACI Struct. 6 (1968) 757-766.

[6] T.J. Wang, T.T.C. Hsu, Nonlinear finite element analysis of concrete structures using new constitutive models, Comp. & Struct. 79 (2001) 2781-2791.

DOI: 10.1016/s0045-7949(01)00157-2

[7] K.J. Willam, E.P. Warnke, Constitutive models for the triaxial behavior of concrete, International Association of Bridge and Structural Engineers Seminar on Concrete Structures Subjected to Triaxial Stress, Bergamo, 1974.

[8] W.F. Chen, Constitutive equations for engineering materials, John Wiley Inter-Science, New York, 1982.

[9] P. Fanning, Nonlinear models of reinforced and post-tensioned concrete beams, Elec. J. Struct. Eng. 2 (2001) 111-119.