Experimental Study on Stiffness Degradation and Liquefaction Characteristics of Marine Sand in the East Nan-Ao Area in Guangdong Province, China

Offshore wind power, as an efficient renewable energy source, is being vigorously developed nowadays. However, the liquefaction of marine sand due to earthquakes brings potential safety hazards turbine structures. In this study, a series resonant column and undrained cyclic triaxial tests were carried out investigate stiffness degradation characteristics in offshore farm at East Nan-ao area Guangdong Province (China). Results show that confining pressure increases shear modulus restrains nonlinearity modulus. The resistance soils significantly with increase relative density. effect particle size on related stress ratio. additional induced by presence structure enlarges required for shallow soil liquefaction. Besides, model predicting another modified based Seed’s pore development have been established, which can efficiently fit dynamic generation excess water pressures tests, respectively.