Browsing by Author "Fard, Maryam Massah"

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    Analysis of offshore wind turbine by considering soil-pile-structure interaction: effects of foundation and sea-wave properties
    (Taylor & Francis, 2022) Fard, Maryam Massah; Erken, A.; Erkmen, Bülent; Ansal, Mustafa Atilla; Civil Engineering; FARD, Maryam Massah; ERKMEN, Bülent; ANSAL, Mustafa Atilla
    Prediction of the dynamic performance of an offshore wind turbine (OWT) requires consideration of many different design parameters. Besides the superstructure, the OWT foundation also plays an important role both functionally and financially in the design. In this study, numerical dynamic analyses of an offshore wind turbine with a monopile foundation are performed under wave loading that may lead to soil liquefaction around the pile due to cyclic stresses induced by the pile displacements using the open-source program, OpenSees. Effects of foundation properties such as monopile diameter, pile embedment depth, and sea-wave characteristics such as its period, sea-water depth, duration, and level of the loading on the dynamic performance of the system are investigated. The results in terms of deformations, excess pore water pressure, and inertial forces are presented and discussed. The findings are considered as valuable guidance on the estimation of the dynamic performance and liquefaction susceptibility of the offshore wind turbine foundations under cyclic sea-wave loads.
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    Numerical modeling of the offshore wind turbine monopile foundation under environmental loading
    (CRC Press, 2019) Fard, Maryam Massah; Erken, A.; Erkmen, Bülent; Ansal, Mustafa Atilla; Civil Engineering; Silvestri, F.; Moraci, N.; FARD, Maryam Massah; ERKMEN, Bülent; ANSAL, Mustafa Atilla
    Prediction of dynamic performance of an offshore wind turbine requires consideration of many different design parameters. Beside the superstructure, foundation also plays an important role both functionally and financially in their design. In this study, numerical dynamic analysis of an offshore wind turbine with a monopile foundation is performed under wave action that may lead to liquefaction around pile diameter due to the cyclic stresses induced by the pile displacements. The effects of foundation characteristic such as monopile diameter and its embedment depth are investigated. The results in terms of displacements, excess pore water pressure, and inertial forces are presented and discussed. Findings are considered to give better estimation of the dynamic performance and liquefaction susceptibility of the offshore wind turbines foundations under cyclic loads induced by the pile displacements.