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BUCKLING OF FRICTION PILES SUPPORTING BRIDGE FOUNDATIONS.
| 题名： | BUCKLING OF FRICTION PILES SUPPORTING BRIDGE FOUNDATIONS. |
| 作者： | Gabr-MA; Wang-J |
| 关键词： | FRICTION-PILES; BRIDGE-FOUNDATIONS; BUCKLING-; PILE-LENGTH; AXIAL-LOADS; EIGENVALUES-; BOUNDARY-CONDITIONS; PILE-TIP; PILE-TOP; EMBEDMENT-PILE; SIDE-FRICTION |
| 摘要： | In practice, evidence suggests that long, slender piles subjected to axial loads can fail under axial stresses below the yield point of the pile material. However, using the minimum potential-energy method, it is possible to quantify a general solution for the critical buckling capacity of long, slender friction piles in clay. The Rayleigh-Ritz method is used to select deflection functions satisfying nine geometric boundary conditions. The equivalent buckling length and the critical axial load of the piles are determined from eigenvalues estimated by the Jacobi Rotation Transformation method. Parameter studies performed to investigate the buckling response of fully and partially embedded piles indicated that the boundary conditions of pile tip have no effect on the critical buckling loads when nondimensional embedment length exceeds a critical value. The critical value depends on the pile-top condition and embedment ratio (defined as embedded length divided by total pile length). Side friction's contribution to buckling stability results in less than a 7% variation in critical buckling length. The model's applicability is illustrated using a design example and load-test data reported in the literature. |
| 总页数： | Transportation Research Record. 1994. (1447) pp93-101 (14 Fig., 1 Tab., 7 Ref.) |
| 报告类型： | 科技报告 |
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