Experimental investigation of the vertical pullout cyclic response of bucket foundations in sand

Abstract A series of 1 g model tests was conducted to investigate the accumulated vertical pullout displacement and unloading stiffness of bucket foundations embedded in dry and saturated sands. The foundations were subjected to vertical pullout cyclic loading with different load amplitudes. Cyclic load was applied up to 10 4 cycles. Test results showed that the accumulated vertical pullout displacement increased with the increase in the number of load cycles and cyclic load amplitudes. The unloading stiffness of the bucket foundations decreased with the increase in load amplitude and number of cycles. Empirical equations were proposed based on the test results to evaluate the accumulated vertical pullout displacement and unloading stiffness of the bucket foundations in saturated sand. These equations can be used for the preliminary design of single or tripod bucket foundations.

[1]  Christophe Gaudin,et al.  Centrifuge study on the cyclic performance of caissons in sand , 2014 .

[2]  Hamid Arabzadeh,et al.  An Experimental Investigation Into the Pull-Out Capacity of Suction Caissons in Sand , 2011 .

[3]  Guy T. Houlsby,et al.  A comparison of field and laboratory tests of caisson foundations in sand and clay , 2006 .

[4]  Xiang Zheng,et al.  Experimental studies on the anti-uplift behavior of the suction caissons in sand , 2013 .

[5]  Bin Zhu,et al.  Long-Term Lateral Cyclic Response of Suction Caisson Foundations in Sand , 2013 .

[6]  S. Narasimha Rao,et al.  Studies on pullout capacity of anchors in marine clays for mooring systems , 2006 .

[7]  Le Chi Hung,et al.  Evaluation of combined horizontal-moment bearing capacities of tripod bucket foundations in undrained clay , 2014 .

[8]  Byron W. Byrne,et al.  Response of stiff piles in sand to long-term cyclic lateral loading , 2010 .

[9]  Guy T. Houlsby,et al.  Tensile Loading of Model Caisson Foundations For Structures On Sand , 2004 .

[10]  Byron W. Byrne,et al.  The tensile capacity of suction caissons in sand under rapid loading , 2005 .

[11]  Martin Achmus,et al.  On the behavior of suction buckets in sand under tensile loads , 2014 .

[12]  D. Negussey,et al.  Preparation of Reconstituted Sand Specimens , 1988 .

[13]  Sung-Ryul Kim,et al.  Group effect on bearing capacities of tripod bucket foundations in undrained clay , 2014 .

[14]  Guy T. Houlsby,et al.  Field trials of suction caissons in clay for offshore wind turbine foundations , 2005 .

[15]  Lars Vabbersgaard Andersen,et al.  Observations on bucket foundations under cyclic loading in dense saturated sand , 2014 .

[16]  M. Randolph,et al.  CPT-Based Method for the Installation of Suction Caissons in Sand , 2009 .

[17]  Byron W. Byrne,et al.  Model testing of suction caissons in clay subjected to vertical loading , 2010 .