Changes of friction distribution in negative skin friction pile
induced by loading sequence |
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| Authors: | XIA Li-nong WANG Xin-hua LEI Jin |
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| Institution: | 1. Department of Civil Engineering, Changsha Institute, Changsha 410000, China;
2: School of Civil and Architectural Engineering, Central South University, Changsha 410075, China |
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| Abstract: | Influence mechanisms of loading sequence on pile-soil interaction of negative skin friction (NSF) are simply analysed. Finite element method is used to calculate the differences. Analysis results show that changes of loading sequence would induce the changes of friction distribution in pile, neutral point position and the downdrag caused by NSF. Differences of friction distribution is mainly amount of negative skin friction in upper part of pile, negative skin friction is smaller when negative skin friction appears first; and it does not change with load of pile. Position of neutral point is lower, when negative skin friction appears first; the differences increase as vertical load of pile increase. When negative skin friction appears first, downdrag is smaller than that of pile load applied firstly; the difference increases as load of pile increase. The results will be useful to the research and application for checking negative skin friction. |
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| Keywords: | loading sequence pile negative skin friction friction distribution |
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