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WANG Jian-hua, LI Shu-zhao. Pseudo static finite element analysis of bearing capacity of suction anchor subjected to cyclic loads in soft clay[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(8): 1403-1412.
Citation: WANG Jian-hua, LI Shu-zhao. Pseudo static finite element analysis of bearing capacity of suction anchor subjected to cyclic loads in soft clay[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(8): 1403-1412.

Pseudo static finite element analysis of bearing capacity of suction anchor subjected to cyclic loads in soft clay

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  • Received Date: September 03, 2012
  • Published Date: August 19, 2013
  • A pseudo-static elasto-plastic finite element method is proposed to evaluate the bearing capacity of suction anchors subjected to a combination of average and cyclic loads in soft clay using the undrained cyclic strength. The octahedral shear stress of soil elements associated with the average mooring load is first determined by elasto-plastic finite element calculations using the undrained static strength of soft clay for the method. The undrained cyclic strength of soil elements associated with the specified number of cycles to failure is further determined based on the octahedral shear stress. The load-displacement curve at the mooring point along the loading direction is then determined by the elasto-plastic finite element calculations using the undrained cyclic strength. The cyclic bearing capacity of anchors is finally determined based on the curve and the displacement criterion to failure. The effects of the average mooring load on the undrained cyclic strength and the bearing capacity of suction anchors subjected to a combination of average and cyclic loads are considered. In order to show the validity of the method, model tests on cyclic bearing capacity of suction anchors with different diameters, aspect ratios, average loads, frictional factors, loading directions and failure modes are conducted. The test results are predicted using the pseudo-static elasto-plastic finite element method. The predicted results are less than the test ones. The average difference is not over 10%. Variations of the normalized cyclic bearing capacity with the number of cycles to failure only depend on the normalized average loads. The effects of load directions, anchor diameters and frictional factors of outer wall on the normalized cyclic bearing capacity can be neglected. If the normalized average load is 0.5 and the number of cycles to failure is 1000, the cyclic bearing capacities are about 75% and 80% of the static bearing capacity respectively for the vertical failure and the lateral failure, which are in
  • [1]
    ANDERSEN K H, MURFF J D, RANDOLPH M F,et al. Suction anchors for deepwater applications[C]// Frontiers in Offshore Geotechnics. Perth, 2005: 3-30.
    ANDERSEN K H. Bearing capacity under cyclic loading-offshore, along the coast, and on land[J]. Canada Geotechnical Journal, 2009, 46(3): 513-535.
    PREVOST J H. Offshore gravity structures: analysis[J]. Journal of Geotechnical Engineering, ASCE, 1981, 107(2): 143-165.
    周 健. 饱和软黏土循环变形的弹塑性研究[J]. (岩土工程学报), 2000, 22(4): 499-502.(ZHOU Jian. Elastoplastic study on cyclic strain of saturated soil[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(4): 499-502. (in Chinese)).
    ANDERSEN K H, LAURITZSEN R. Bearing capacity for foundation with cyclic loads[J]. Journal of Geotechnical Engineering, ASCE, 1988, 114(5): 540-555.
    ANDERSEN K H, JOSTAD H P. Foundation design of skirted foundations and anchors in clay[C]// Offshore Technology Conference. Houston, 1999: 10824.
    ANDERSEN K H, DYVIK R, SCHRDER K,et al. Field tests of anchors in clay II: predictions and interpretation[J]. Journal of Geotechnical Engineering, ASCE, 1993, 119(10): 1532-1549.
    ANDERSEN K H, DYVIK R, LAURITZSEN R,et al. Model tests of offshore platforms II interpretation[J]. Journal of Geotechnical Engineering, ASCE, 1989, 115(11): 1550-1568.
    DET NORSKE VERITAS. Geotechnical design and installation of suction anchors in clay[M]. H?vik: DNV Recommended Practice RP-E303, 2005.
    WANG Jian-hua, YANG Yang, LIU Jing-lei. Model tests and analysis method on cyclic bearing capacity of suction caissons with the taut mooring system in soft clays[C]// 21st Int Offshore and Polar Engrg Conf. USA Maui, 2011: 478-484.
    WANG Jian-hua, LI Chi, KATHRYN Moran. Cyclic undrained behavior of soft clays and cyclic bearing capacity of a single bucket foundation[C]// 15th Int Offshore and Polar Engrg Conf. Seoul, 2005: 392-399.
    WANG Jian-hua, YANG Hai-ming. Model tests and numerical simulation on bearing capacity of bucket foundations in soft clay under vertical static and cyclic loads[C]// 17th Int Offshore and Polar Engrg Conf. Protuga, 2007: 1547-1552.
    王建华, 杨海明. 软土中桶形基础水平循环承载力模型试验[J]. (岩土力学), 2008, 29(10): 2606-2612.(WANG Jian-hua, YANG Hai-ming. Model tests on horizontal cyclic bearing capacity of bucket foundations in soft clays[J]. Rock and Soil Mechanics, 2008, 29(10): 2606-2612. (in Chinese))
    范庆来, 栾茂田, 杨 庆, 等. 考虑循环软化效应的软基上深埋大圆筒结构承载力分析[J]. (大连理工大学学报), 2006, 469(5): 702-706.(FAN Qing-lai, LUAN Mao-tian, YANG Qing, et. al. Analyses of bearing capacity for deeply-buried large-diameter cylindrical structureonsoft clay considering cyclic-softening effect[J]. Journal of Dalian University of Technology, 2006, 469(5): 702-706. (in Chinese))
    栾茂田, 武 科, 范庆来, 等. 复合加载下桶形基础循环承载性能数值分析[J]. (海洋工程), 2007, 25(3): 88-94.(LUAN Mao-tian, WU Ke, FAN Qing-lai,et al. Numerical analysis of cyclic bearing capacity of bucket foundation under combined loading mode[J]. The Ocean engineering, 2007, 25(3): 88-94. (in Chinese))
    ANDRESEN L, JOSTAD H P. ANDERSEN K H, et al. Finite element analyses in offshore foundation design[C]// The 12th International Conference of International Association for Computer Methods and Advances in Geomechanics. Goa, 2008: 3247-3262.
    ANDERSEN K H, KLEVEN A, HEIEN D. Cyclic soil data for design of gravity structures[J]. Journal of Geotechnical Engineering, ASCE, 1988, 114(5): 517-539.
    American Petroleum Institute. Geotechnical and foundation design consideritions[S]. United States, 2011.
    李 驰, 王建华. 饱和软黏土动力特性循环扭剪实验研究[J]. (岩土力学), 2008, 29(2): 460-464.(LI Chi, WANG Jian-hua. Cyclic torsional shear experimental studies on dynamic characters for saturated soft clay[J]. Rock and Soil Mechanics, 2008, 29(2): 460-464. (in Chinese)).
    王建华, 曲延大. 循环应力作用下饱和软黏土的不固结不排水强度与破坏准则[J]. (水利学报), 2011, 42(6): 672-677.(WANG Jian-hua, QU Yan-da. Unconsolidated and undrained strength and failure criterion of the soft clay under cyclic stresses[J]. Journal of Hydraulic Engineering, 2011, 42(6): 672-677. (in Chinese)).
    刘晶磊. 循环荷载作用下软黏土中张紧式吸力锚承载力研究[D]. 天津: 天津大学, 2012.(LIU Jing-lei. Study on bearing capacity of suction anchors with taut mooring systems in soft clay under cyclic loading[D]. Tianjin: Tianjin University, 2012. (in Chinese))
    王建华, 刘晶磊, 周杨锐. 静荷载与循环荷载作用下张紧式吸力锚承载特性的模型试验[J]. (岩土工程学报), 2012, 34(6): 997-1004.(WANG Jian-hua, LIU Jing-lei, ZHOU Yang-rui. Model tests on bearing capacities of suction anchors with taut mooring systems under combined static and cyclic loads[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(6): 997-1004. (in Chinese))
    EI-SHERBINY R M. Performance of suction caisson anchors in normally consolidated clay[D]. Austin: The University of Texas at Austin, 2005.
    WANG Jian-hua, LIU Jing-lei, YANG Yang. Model tests on failure modes and bearing capacities of suction anchors with taut mooring system[C]// 22th Int Offshore and Polar Engrg Conf. Rhodes, 2012(2): 1547-1552.
    王建华, 刘晶磊, 陈文强. 加载方向对张紧式吸力锚极限承载力的影响分析[J]. (岩土工程学报), 2012, 34(3): 385-391.(WANG Jian-hua, LIU Jing-lei, CHEN Wen-qiang. Effects of loading direction on ultimate bearing capacity of suction anchors with taut mooring system[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(3): 385-391. (in Chinese))
    CHEN W, RANDOLPH M F. Uplift capacity of suction caissons under sustained and cyclic loading in soft clay[J]. ASCE, Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(11): 1352-1363.

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