Investigating the Lateral Behavior of Offshore Monopiles Subjected to Cyclic Lateral Loads in Sandy Soil: An Experimental Study

Document Type : Original papers

Authors

1 Ph.D. Student, Civil Eng. Dep. Faculty of Engineering, Aswan University, Egypt

2 Associate Professor, Civil Eng. Dep. Faculty of Engineering, Aswan University, Egypt

3 Professor, Ismailia Faculty of Engineering, Suez Canal University, Egypt

Abstract

Due to the increasing demand of renewable energy, offshore wind turbines (OWTs) of large dimensions are widely used nowadays. These types of structures are subjected to very high environmental lateral loads caused by wind, wave and current loads, and bending moments. To support these loads, deep foundations of large dimensions are necessary. Large diameter monopiles are currently the most popular foundation type used to support OWTs. Owing to the increasing necessity of large dimension monopiles, their behavior should be paid much attention, and their dimensions should be carefully optimized. Thus, an extensive parametric study considering both monotonic and cyclic lateral loads should be perseveringly performed. The main aim of this paper is to present a sensitivity analysis that provides an insight on the effect of different parameters affecting the monopile behavior under monotonic/cyclic lateral loads throughout the utilization of a 1g experimental model. The effect of monopile diameter and embedded length on the monopile behavior is studied and analyzed. According to the experimental results, the effect of monopile embedded length has a higher reduction impact on the lateral monopile behavior in both monotonic and cyclic lateral loading cases than of the monopile diameter. Thus, designers should pay attention to the embedded length more than the monopile diameter.

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Aswan University Journal of Sciences and Technology
Volume 5, Issue 3
September 2025
Pages 141-158

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