Undrained Vertical Bearing Capacity Factors for Ring Shallow Footings
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- 作者：Sadok Benmebarek ; Insaf Saifi ; Naima Benmebarek
- 关键词：Numerical modeling ; Ring footing ; Bearing capacity ; Clay ; Failure
- 刊名：Geotechnical and Geological Engineering
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：35
- 期：1
- 页码：355-364
- 全文大小：
- 刊物类别：Earth and Environmental Science
- 刊物主题：Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Terrestrial Pollution; Waste Management/Waste Technology; Civil Engineering;
- 出版者：Springer International Publishing
- ISSN：1573-1529
- 卷排序：35
文摘
In this paper, numerical computations using FLAC code are carried out to evaluate the effects of both the ratio of internal radius to external radius ‘ri/ro’ of the ring footing and the embedment ratios up to unity on the undrained bearing capacity factor ‘\(N_{c}^{\prime }\)’ for different roughness conditions. It is observed that for both smooth and rough surface ring footings, hardly any reduction occurs in the value of \(N_{c}^{\prime }\) with an increase in the ratio ri/ro up to 0.25. Whereas for ri/ro > 0.25, the values of \(N_{c}^{\prime }\) decrease significantly with increasing ri/ro. However, for embedded ring footing with rough sides, the results indicate that the bearing capacity difference between circular and ring footings decreases with increase of the embedment depth. For instance, for ri/ro = 0.5, the difference vanishes completely for embedment ratio >0.5. The results from the analysis compare reasonably well with available theoretical data from the literature.