Finite Element Analysis and Simplified Model of Searing Bottom Concrete for Steel Cofferdam

Abstract:

Steel cofferdam is an advanced technology for high pile cap construction in deepwater foundation. Using Xiangjiang river bridge of Changsha-Xiangtan expressway as engineering background, we use software ANSYS to analyze the stress states of sealing bottom concrete layer of steel cofferdam of this bridge, and obtain some results of deformation, direct stress, principal stress, shear stress and equivalent stress. At the same time, a fixed-ends beam under uniform pressure is used to simplify the analytical model, and results show that this model can give relatively correct stress state with proper precision, but give poor deformation state. As for the design of steel cofferdam, engineers are mainly interested in the stress results. So the simplified model can be used in the design and analysis procedure.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 1873-1878
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.1873
• Online since: May 2011
• Authors: Mei Liang Yang, Gui Yun Xia, Fang Ping Zhong
• Keywords: Finite Element, Searing Bottom Concrete, Simplified Model, Steel Cofferdam, Strength, Stress

References

[1] Luo G Y, Cao H, Pan H. Optimal design and monitoring of steel sheet-pile cofferdams of Xingguang bridge[J]. Journal of South China University of Technology(Natural science edition),2006,34(2):124-129.

[2] Wei X H. Design and construction of large diameter and lightweight double-wall steel cofferdam socketed in underwater rock [J].Bridge construction,2009(6):58-62.

[3] Kort D A. The transfer matrix method applied to steel sheet pile walls [J]. International Journal for numerical and analytical methods in geomechanics,2003(6):453-472.

DOI: 10.1002/nag.281

[4] Byfield M P, Crawford R J. Oblique bending in U-shaped steel sheet piles proceedings of the institution of civil engineers[J]. Structures and buildings,2003(3):255-261.

DOI: 10.1680/stbu.2003.156.3.255

[5] Byfield M P, Mawer R Q. Analysis of reduced modulus action in U-section steel sheet piles[J]. Journal of constructional steel research, 2004(3):401-410.

DOI: 10.1016/s0143-974x(03)00119-6

[6] Crawford R J, Byfield M P. A numerical model for predicting the bending strength of Larssen steel sheet piles[J]. Journal of constructional steel research,2002(10):1361-1374.

DOI: 10.1016/s0143-974x(02)00016-0

[7] Xia G Y, Li C X. Calculating report of steel sheet pile cofferdam in Xingzhao Pearl River Bridge[R]. Changsha: Changsha university of Science and Technology, 2007.

[8] Xia G Y, Li C X. Frame structure theory and its applications including shear deformation effect [M].Beijing: China communications press, 2008.

[9] Bathe K J. Finite element procedures [M]. Prentice Hall,1996.

[10] Young W C, Budynas R G. Roark's formulas for stress and strain[M].McGraw-Hill Companies, Inc.2002.

[11] Gere J M. Mechanics of materials[M]. Brooks/Cole Publishing Company,2001.