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Behavior of Combined Piled-Raft Foundation Under Eccentric Loading
When the raft settlement exceeds allowable values, the application of piled-raft foundation is more common. Nowadays, combined piled-raft foundation gives a greater effectiveness in load sharing when it is subjected to vertical loads. But when the narrow building is subjected to wind or seismic load with some eccentricity, it can tilt the building permanently. To minimize this problem and to increase the stability of the building, combined piled-raft foundation gives a wider solution. In present study, an effort has been made to examine the piled-raft foundation subjected to eccentric load by 3D finite element modeling through ABAQUS software. The analysis was made by changing soil’s Young’s modulus in different layers, and it is found that load carrying capacity of piled-raft foundation is greatly affected by pile spacing to diameter ratio (i.e., s/d = 3, 4, 5) and eccentricity ratio (i.e., e/B = 0, 0.1, 0.25, 0.4). The load versus displacement curves for piled-raft systems are assessed and effects of different pile group configurations such as 3 × 3, 4 × 4 and 5 × 5 on load carrying capacity are observed. Further, in case of eccentric loading, the load transfer behavior of the applied load in both piles and raft are also evaluated. From the load displacement curve, it is observed that the load carrying capacity of piled-raft foundation increases when the spacing between the piles increases in the piled-raft foundation as the group interaction effect is reduced in this case.
Behavior of Combined Piled-Raft Foundation Under Eccentric Loading
When the raft settlement exceeds allowable values, the application of piled-raft foundation is more common. Nowadays, combined piled-raft foundation gives a greater effectiveness in load sharing when it is subjected to vertical loads. But when the narrow building is subjected to wind or seismic load with some eccentricity, it can tilt the building permanently. To minimize this problem and to increase the stability of the building, combined piled-raft foundation gives a wider solution. In present study, an effort has been made to examine the piled-raft foundation subjected to eccentric load by 3D finite element modeling through ABAQUS software. The analysis was made by changing soil’s Young’s modulus in different layers, and it is found that load carrying capacity of piled-raft foundation is greatly affected by pile spacing to diameter ratio (i.e., s/d = 3, 4, 5) and eccentricity ratio (i.e., e/B = 0, 0.1, 0.25, 0.4). The load versus displacement curves for piled-raft systems are assessed and effects of different pile group configurations such as 3 × 3, 4 × 4 and 5 × 5 on load carrying capacity are observed. Further, in case of eccentric loading, the load transfer behavior of the applied load in both piles and raft are also evaluated. From the load displacement curve, it is observed that the load carrying capacity of piled-raft foundation increases when the spacing between the piles increases in the piled-raft foundation as the group interaction effect is reduced in this case.
Behavior of Combined Piled-Raft Foundation Under Eccentric Loading
Lecture Notes in Civil Engineering
Muthukkumaran, Kasinathan (editor) / Reddy, C. N. V. Satyanarayana (editor) / Joseph, Anil (editor) / Senthamilkumar, S. (editor) / Rahaman, Hannanur (author) / Deb, Plaban (author) / Pal, Sujit Kumar (author)
Indian Geotechnical Conference ; 2021 ; Trichy, India
2022-11-29
10 pages
Article/Chapter (Book)
Electronic Resource
English
Behavior of partially connected piled raft foundation under seismic loading
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