Model Tests and Analyses for Dynamic Bearing Capacity of Foundations Situated on Slopes
| Autor: | Yi-HsienLin, 林宜賢 |
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| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 In the present study, bearing capacity of footings placed on slopes were investigated using reduce-scaled model tests. An idealized 2-D backfill consisting of uniform diameter steel rods was used as the test medium. The present study focuses on the restraint conditions of footings and the input wave characteristics on the dynamic bearing capacity and the stability of footings. The following conclusions were obtained: 1. The settlement and failure mode of foundation are greatly affected by the restraint condition imposed on footings. In general, the stability of fixed footing is superior to that of free-rotating. 2. On the top of the slope model, the acceleration amplification response varies with the footing types and input wave frequencies. 3. Depths of failure surfaces developed under the footing are influenced by the restraint conditions will affect the failure depth in dynamic situation. 4. The correction of bearing capacity on slope needs to consider the directionality of eccentricity and obtain a reasonable bearing capacity correction factor based on Huang and Kang (2008b). 5. A gap exists between the horizontal peak ground acceleration (amax) in the dynamic tests and the seismic coefficient (kh). This gap can be minimized by using the empirical rule of amax /3 = kh•g (g: gravitational acceleration) 6. The slope subjected to step-wise intensified sinusoidal waves tends to show larger displacements (or footing settlements), failing at relatively smaller values of amax than that subjected to random waves. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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