Showing papers by "Fu-Ping Gao published in 2019"
TL;DR: In this paper, the combined wave-current induced excess pore-pressures in a sandy seabed were experimentally simulated with a specially-designed flume, which can concurrently generate periodic waves and a following/opposing co-directional current.
45 citations
TL;DR: In this paper, the effects of non-dimensional pile spacing and flow skew angle on the scour depth and time scale of scour around twin piles are intensively examined, and the empirical formula of dimensionless equivalent pile diameter as the function of G/D and α is established to predict the maximum scour depths at the twin piles.
41 citations
TL;DR: In this paper, an apparent axial anti-sliding coefficient is proposed to describe the antisliding capacity for pipeline walking on a sloping seabed under the fully-drained condition.
12 citations
20 Aug 2019
TL;DR: In this paper, the local scour at a monopile foundation generated by the incoming shear flow has significant influence on both quasi-static lateral responses and dynamic responses of the monopile.
Abstract: Monopile is the most commonly used foundation type for offshore wind turbines. The local scour at a monopile foundation generated by the incoming shear flow has significant influence on both quasi-static lateral responses and dynamic responses of the monopile. This chapter focuses particularly on characterizing the local scour in both spatial and temporal scales and revealing the scour mechanisms associated with the flow field around a monopile. The predicting methods for the equilibrium scour depth and the time scale of scour are detailed under various representative flow conditions in the marine environment. The scale effect while extrapolating the results of model tests to prototype conditions is highlighted. The local scour imposes significant influence not only on the deformation and stiffness of the monopile foundation, but also on the natural frequency and fatigue life of the structure system. Monopiles with diameters up to 10 m have become a feasible option as the industry is currently advancing into deeper waters. More meticulous considerations for monopile design associated with the scour depth prediction and evaluation of scour effects are still in need to efficiently minimize the cost while remaining safety simultaneously.
6 citations