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Cyclic Settlement of Footings of Different Shapes Resting on Clayey Soil | ||
| Engineering and Technology Journal | ||
| Article 20, Volume 38, 3A, 2020, Pages 465-477 PDF (635.44 K) | ||
| DOI: 10.30684/etj.v38i3A.483 | ||
| Authors | ||
| Aseel N. Najim* ; Mohammed Y. Fattah; Makki K. Al-Recaby | ||
| Civil Engineering Department, University of Technology, Baghdad, Iraq | ||
| Abstract | ||
| An experimental investigation is carried out to investigate the impact of the footing shape, when rested on clayey soil under cyclic loading condition. The model footings used in this study are circular, square and the area of footings is fixed. Cyclic load test is carried out on the cohesive soil with three undrained shear strengths (20 kPa, 40 kPa and 70 kPa). Two depths of foundation embedment (at surface and 5 cm) to know the effect of the depths of the foundations on the change of settlement and total vertical stress and two rates of loading (3 mm/sec and 6 mm/sec) are used. It has been observed that the bearing capacity varies in increasing order as Solid, Circular and Square. It is found that the cyclic settlement in the square foundation is less than the circular foundation. The results reveal that the shape of the footing has a significant effect on its bearing capacity and the settlement characteristics. The vertical stress reaches a constant value which is greater below circular footing and it is about (70.9 - 92.7) % greater than below square footing. | ||
| Keywords | ||
| Foundation; shape; Clay; cyclic load; Settlement | ||
| References | ||
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[1] S. R. Pathak, S. N. Kamat, and D. R. Phatak, “Study of behavior of square and rectangular footings resting on cohesive soils based on model tests” The 6th in International Conference on Case Histories – 6th ICCGE Histories in Geotechnical Engineering, 2008. [2] G. G. Meyerhof, “Some recent research on the bearing capacity of foundations,” Can. Geotech. J., Vol. 1, No 1, pp. 16– 26, 1963. [3] L. Zhao, and J. H. Wang, “Vertical bearing capacity for ring footings,” Compute. Geotech., Vol. 35, No 2, pp. 292–304, 2008. [4] J. Kumar, and M. Chakraborty, “Bearing capacity factors for ring foundations,” J. Geotech. Geoenviron. Eng., Vol. 141, No 10, pp. 1–7, 2015. [5] V. Krishna, and K. Nikita, “Performance of square footing resting on laterally confined sand,” International Journal of Advanced Engineering Research and Studies, 2014. [6] H. M. Pavan, and T. Aruna, “Experimental study on square footing resting on sand with and without confinement,” IRJET, pp. 3-7, 2016. [7] M.Y. Fattah, H.H. Karim, and H.H. Al- Qazzaz, “Cyclic behavior of footings on dry sand under different rates of loading,” International Journal of Construction Engineering and management, Vol. 6, No 6, pp. 240-253, 2017. [8] ASTM, “D2487-06 standard test method for classification of soils for engineering purposes (unified soil classification system),” 2006. [9] ASTM, “D854 standard test method for specific gravity of soil solids by water pycnometer,” 2006. [10] ASTM, “D422-02 Standard test method for particle size-analysis of soils,” 2006. [11] K. Terzaghi, “Theoretical soil mechanics,” New York: John Wiley and Sons, 1943. [12] M. Patel, and M. Bhoi, “Effect of different shape of footing on its load settlement behavior (circular, square and rectangular” The 4th Int. Conference on Civil, Structural, and Environmental Engineering - CSEE 19, Italy, 2019. [13] L. Zhao, and J. H. Wang, “Vertical bearing capacity for ring footings,” Compute. Geotech., Vol. 35, No 2, pp. 292-304,2008 | ||
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