Simplified model for upper bound method to analyze horizontal bearing capacity of torpedo anchors

被引：0
|
作者：
Yu L. [1 ]
Yang Q. [1 ]
Zhang J.-L. [1 ]
Yang G. [1 ]
机构：
[1] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2020年 / 42卷 / 04期
关键词：
Horizontal bearing capacity; Rotation center; Torpedo anchor; Ultimate analysis; Upper bound method;
D O I：
10.11779/CJGE202004022
中图分类号：
学科分类号：
摘要：
The bearing capacity of torpedo anchors is the major concern for the marine industry. In this study, a simple model is proposed to calculate their horizontal bearing capacity based on the upper-bound limit analysis of plasticity. The horizontal bearing factor, Np,avg=(Su, Lf/Dw), is obtained considering the influences of aspect ratio of torpedo anchor fluke(Lf/Dw) and soil strength (Su) by using the finite element method (FEM), and it is applied in the simple model. The analytic results of the simple model are verified through the comparative study with FEM and de'Sousa results. It is found that: (1) When the rotation center position is lower than the fluke of torpedo anchors, the rotation center position is close to the anchor tip by reducing fluke width or fluke length. (2) When the fluke length is larger than 1/2 length of torpedo anchors, compared with that by increasing the fluke length, the bearing capacity is obviously improved by increasing the fluke width. It is helpful for the optimization design of torpedo anchor shape. © 2020, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
引用
收藏
页码：773 / 781
页数：8
相关论文
共 18 条
  • [1] Lieng J.T., Tjelta T.I., Skaugset K., Installation of two prototype deep penetrating anchors at the GjØa Field in the North Sea, Proceedings of the Offshore Technology Conference, (2010)
  • [2] De Araujo J.B., Machado R.D., De Medeiros Junior C.J., High holding power torpedo pile - results for the first long term application, Proceedings of the 23rd International Conference on Offshore Mechanics and Arctic Engineering, (2004)
  • [3] Brandao F.E.N., Henriques C.C.D., De Araujo J.B., Et al., Albacora Leste field development - FPSO P-50 mooring system concept and installation, Proceedings of the 38th Offshore Technology Conference, (2006)
  • [4] O'Beirne C., O'Loughlin C.D., Wang D., Et al., Capacity of dynamically installed anchors as assessed through field testing and three-dimensional large-deformation finite element analyses, Canadian Geotechnical Journal, 52, 5, pp. 548-562, (2015)
  • [5] Fu Y., Zhang X., Li Y., Et al., Holding capacity of dynamically installed anchors in normally consolidated clay under inclined loading, Canadian Geotechnical Journal, 54, 9, pp. 1257-1271, (2017)
  • [6] Broms B.B., Lateral resistance of piles in cohesive soils, Journal of the Soil Mechanics and Foundations Division, ASCE, 90, 2, pp. 27-64, (1964)
  • [7] Murff J.D., Hamilton J.M., Pultimate for undrained analysis of laterally loaded piles, Journal of Geotechnical Engineering, 119, 1, pp. 91-107, (1993)
  • [8] Yao Y.P., Hou W., Zhou A.N., UH model: Three-dimensional unified hardening model for overconsolidated clays, Géotechnique, 59, 5, pp. 451-469, (2009)
  • [9] Yao Y.P., Zhou A.N., Nonisothermal unified hardening model: a thermo-elasto-plastic model for clays, Géotechnique, 63, 15, pp. 1328-1345, (2013)
  • [10] Yao Y.P., Sun D.A., Matsuoka H., A unified constitutive model for both clay and sand with hardening parameter independent on stress path, Computers and Geotechnics, 35, 2, pp. 210-222, (2008)
12