Mohamed, E., Helal, E., Khalil, E. (2022). Enhancement of Tabular Pile lateral resistance with external wings. JES. Journal of Engineering Sciences, 50(1), 32-46. doi: 10.21608/jesaun.2021.108066.1095
Ezzeldin Mohamed; Emad Helal; Eehab Khalil. "Enhancement of Tabular Pile lateral resistance with external wings". JES. Journal of Engineering Sciences, 50, 1, 2022, 32-46. doi: 10.21608/jesaun.2021.108066.1095
Mohamed, E., Helal, E., Khalil, E. (2022). 'Enhancement of Tabular Pile lateral resistance with external wings', JES. Journal of Engineering Sciences, 50(1), pp. 32-46. doi: 10.21608/jesaun.2021.108066.1095
Mohamed, E., Helal, E., Khalil, E. Enhancement of Tabular Pile lateral resistance with external wings. JES. Journal of Engineering Sciences, 2022; 50(1): 32-46. doi: 10.21608/jesaun.2021.108066.1095
Enhancement of Tabular Pile lateral resistance with external wings
1Construction Research Institute, National water Research Center, NWRC, Cairo, Egypt
26 October University for Modern Sciences and Arts (MSA), Egypt.
Abstract
The foundations for offshore wind turbines represent the main item either for cost or installation process, and the lateral resistance of tabular piles is the main factor for its design. Therefore, studies for consistent and efficient foundations have become essential for offshore wind turbines when using traditional mono-pile foundations under practical and environmental conditions. This research discusses the increase in the lateral behavior of open tabular piles with the addition of external wings near the ground level with specific dimensions. Four wings were added to the exterior wall of the open-ended pipe pile at equal angles 90 degrees. The wings length varied from 0.25 to 0.5 of the pile diameter. Each wing length is studied with two depths of 1.25, and 2.5 pile diameter. The numerical analysis was verified with published results of centrifugal tests. The successive parametric study discussed the feasibility of the added wings. Inclusive, the resultant load direction was considered as changed between 0 to 45o with 5 degrees to the wings orientation horizontally.
[1] M.M. Al-Nasra, I.A. Duweib, A.S. Najmi, The Use of Pyramid Swimmer Bars as Punching Shear Reinforcement in Reinforced Concrete Flat Slabs, J. Civ. Eng. Res. 2013 (2013) 75–80. https://doi.org/10.5923/j.jce.20130302.02.
[2] Al-Nasra, the Use of Swimmer Bars as Shear Reinforcement in Reinforced Concrete Beam, Am. J. Eng. Appl. Sci. 6 (2013) 87–94. https://doi.org/10.3844/ajeassp.2013.87.94.
[3] P. Saravanakumar, A. Govindaraj, Influence of vertical and inclined shear reinforcement on shear cracking behavior in reinforced concrete beams, Int. J. Civ. Eng. Technol. 7 (2016) 602–610.
[4] M. AL NASRA, Investigating Alternatives in Shear Reinforcements in the Reinforced Concrete Beams, (2015) 27–31. https://doi.org/10.15224/978-1-63248-070-5-45.
[5] N.A.A. Hamid, the use of horizontal and inclined bars as shear reinforcement, Use Horiz. Inclin. Bars As Shear Reinf. (2005) 131.
[6] ACI Committee 318, Building Code Requirements for Structural Concrete, 2014.
[7] E. (203-2017)., Egyptian Code of Practice for Design and Construction of [1] X. Wang, X. Zeng, J. Li, X. Yang, and H. Wang, “A review on recent advancements of substructures for offshore wind turbines,” Energy Convers. Manag., vol. 158, pp. 103–119, 2018.
[8] EWEA, “The European offshore wind industry key statistics report 2015,” … δΈ€ Doc. …, no. January, pp. 1–31, 2016.
[9] M. M. Savino, R. Manzini, V. Della Selva, and R. Accorsi, “A new model for environmental and economic evaluation of renewable energy systems: The case of wind turbines,” Appl. Energy, vol. 189, pp. 739–752, 2017.
[10] Q. Li, Y. Kamada, T. Maeda, J. Murata, K. Iida, and Y. Okumura, “Fundamental study on aerodynamic force of floating offshore wind turbine with cyclic pitch mechanism,” Energy, vol. 99, pp. 20–31, 2016.
[11] A. Pacheco, E. Gorbeña, C. Sequeira, and S. Jerez, “An evaluation of offshore wind power production by floatable systems: A case study from SW Portugal,” Energy, vol. 131, pp. 239–250, 2017.
[12] H. S. Arshi et al., “Modelling of monopile-footing foundation system for offshore structures in cohesionless soils,” 18th Int. Conf. Soil Mech. Geotech. Eng. Challenges Innov. Geotech. ICSMGE 2013, vol. 3, no. September, pp. 2307–2310, 2013.
[13] S. Arshi and K. Stone, “An investigation of a rock socketed pile with an integral bearing plate founded over weak rock Étude d ’ une pile avec une plaque encastrée dans une roche molle,” Geotech. Eng., no. August 2015, pp. 705–710, 2011.
[14] B. M. Lehane, B. Pedram, J. A. Doherty, and W. Powrie, “Improved Performance of Monopiles When Combined with Footings for Tower Foundations in Sand,” J. Geotech. Geoenvironmental Eng., vol. 140, no. 7, p. 04014027, 2014.
[15] X. Wang, X. Zeng, X. Li, and J. Li, “Investigation on offshore wind turbine with an innovative hybrid monopile foundation: An experimental based study,” Renew. Energy, vol. 132, pp. 129–141, 2019.
[16] X. Wang, X. Zeng, X. Yang, and J. Li, “Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modeling,” Appl. Energy, vol. 235, pp. 1335–1350, 2019.
[17] X. Wang, X. Zeng, J. Li, and X. Yang, “Lateral bearing capacity of hybrid monopile-friction wheel foundation for offshore wind turbines by centrifuge modeling,” Ocean Eng., vol. 148, pp. 182–192, 2018.
[18] X. Wang, X. Zeng, X. Li, and J. Li, “Liquefaction characteristics of offshore wind turbine with hybrid monopile foundation via centrifuge modeling,” Renew. Energy, vol. 145, pp. 2358–2372, 2020.
[19] X. Wang, X. Yang, and X. Zeng, “Seismic Centrifuge Modelling of Suction Bucket Foundation for Offshore Wind Turbine,” Ocean Eng., vol. 141, pp. 295–307, 2017.
[20] H. S. Arshi et al., “Modelling of monopile-footing foundation system for offshore structures in cohesionless soils,” Renew. Energy, vol. 235, no. 3, pp. 1335–1350, 2019.
[21] X. Wang, X. Zeng, and J. Li, Assessment of bearing capacity of axially loaded monopiles based on centrifuge tests, vol. 167. 2018.
[22] B. M. Lehane et al., “Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modeling,” Appl. Energy, vol. 158, no. April, pp. 1–28, 2011.
[23] J. Li, X. Wang, Y. Guo, and X. B. Yu, “The loading behavior of innovative monopile foundations for offshore wind turbine based on centrifuge experiments,” Renew. Energy, vol. 152, pp. 1109–1120, 2020.
[24] M. Iftekharuzzaman and B. C. Hawlader, “Numerical modeling of lateral response of long flexible piles in sand,” Geotech. Eng., vol. 44, no. 3, pp. 25–31, 2013.
[25] T. D. Smith, “Pile horizontal soil modulus values,” J. Geotech. Eng., vol. 113, no. 9, pp. 1040–1044, 1987.
[26] E. A. Alderlieste, “Experimental Modelling of Lateral Loads on Large Diameter Mono-Pile Foundations in Sand,” TU Delft, vol. 138, no. April, pp. 1–28, 2011.
[27] T. N. O. Diana, “User ’ s Manual Material Library,” 2018.
[28] X. Wang, X. Zeng, X. Li, J. Li, Feasibility Study of Offshore Wind Turbines with Hybrid Monopile Foundation Based on Centrifuge Modeling, App. Energy 209, 2018, 127 – 139.