Bearing capacity of circular footings under surcharge using state-dependent finite element analysis
โ Scribed by Junhwan Lee; Rodrigo Salgado; Sooil Kim
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 411 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0266-352X
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โฆ Synopsis
Footings are often used to support structures at sites where the soils near the surface are sufficiently strong to serve as a bearing layer. In this study, estimation of the bearing capacity of footings resting on a soil mass acted upon by a surcharge is investigated and related to the cone resistance q c . Non-linear finite element analyses based on a state-dependent stress-strain model were performed to obtain the load-settlement responses of axially loaded circular footings. Various values of relative density, lateral earth pressure ratio, depth of embedment and footing diameter were considered in the analyses. Based on the finite element results, load-settlement curves were obtained and used to determine the unit limit bearing capacity of the footings in terms of the cone resistance q c . Values of the unit bearing capacity for different values of surcharge were in a narrow range, while considerable variation in unit bearing capacity was observed with relative density D R . It was observed that the unit limit bearing capacity for a given surcharge, normalized with respect to q c , decreases as D R increases, with rates of change depending on the lateral earth pressure ratio K 0 . The effect of K 0 was greater for lower D R values.
๐ SIMILAR VOLUMES
## Abstract By using the lower bound limit analysis in conjunction with finite elements and linear programming, the bearing capacity factors due to cohesion, surcharge and unit weight, respectively, have been computed for a circular footing with different values of ฯ. The recent axisymmetric formul