Nonlinear three-dimensional analysis of pile group supported columns considering pile cap flexibility |
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| Institution: | School of Civil and Environmental Engineering, Yonsei University, Seoul 120-749, Republic of Korea;Centre for Built Infrastructure Research (CBIR), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), P.O. Box 123, Sydney, Australia;Faculty of Engineering, Turkish-German University, Istanbul, Turkey;National University of Ireland, Galway, Ireland;School of Civil Engineering and Architecture, Weifang University, Weifang, China;Department of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China;Dept. of Civil and Environmental Engineering, Univ. of Waterloo, Waterloo, ON, Canada N2L 3G1 |
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| Abstract: | A numerical method that takes into account the coupling between the rigidities of the piles, the cap, and the column has been developed for analyzing the response of pile group supported columns. Special attention is given to consideration of pile cap flexibility. A load transfer approach using t–z/q–z and p–y curves is used for the analysis of single piles. The finite element technique is used to combine the pile stiffness with the stiffness of the cap and column. The numerical method developed has been verified by comparing the results with other numerical methods for pile groups. Through comparative studies, it has been found that the maximum load on the individual piles in a group is highly influenced by pile cap flexibility. The prediction of the lateral loads and bending moments in the pile cap is much more conservative in the present analysis than in FBPier 3.0 and shows a definitely larger lateral load and bending moment for various cap thicknesses. |
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