scholarly journals Extra-long steel piles production and transport of Bridge Mainland – Pelješac, Croatia

2021 ◽  
Author(s):  
Bicheng Tang ◽  
Cong Zhu ◽  
Linghua Zeng ◽  
Hao Liu
Keyword(s):  
Offshore Wind ◽  
Steel Pipe ◽  
Design Parameters ◽  
Environment Protection ◽  
European Standard ◽  
Offshore Wind Power ◽  
Steel Piles ◽  
Oil Rig ◽  
Pile Length ◽  
Steel Pipe Pile

Steel pipe pile as one of the foundation forms has the advantage of high bearing capacity, environment protection and installation, which were widely adopted to sea-crossing bridge, offshore wind power and marine oil rig at present. With the development of project scale, the length and diameter of the piles were increasing gradually. Meanwhile, civil engineers had to face the outstanding challenges in the production and transportation of extra-long and extra-large steel pipe piles. The design parameters of steel piles were controlled under the highest and strictest execution class EXC4 B+ in accordance with the European standard EN 1090-2. Additionally, the pile length of 130,6 m set a record for entire pre-fabricated longest steel pile in the field of civil engineering worldwide at that time. All the manufactured piles were delivered by cargo vessel after long voyage to Croatia. The accumulated experience of Pelješac Bridge could be as a reference for similar projects in future.

A continuum-based model for a laterally loaded steel pipe pile in layered soils in offshore wind farms

2021 ◽  
Vol 14 (16) ◽  
Author(s):  
Xiaojuan Li ◽  
Guoliang Dai ◽  
Qian Yin ◽  
Xueying Yang ◽  
Weiming Gong
Keyword(s):  
Wind Farms ◽  
Offshore Wind ◽  
Steel Pipe ◽  
Layered Soils ◽  
Offshore Wind Farms ◽  
Pipe Pile ◽  
Laterally Loaded ◽  
Steel Pipe Pile

scholarly journals Mathematical Model of Homogeneous Corrosion of Steel Pipe Pile Foundation for Offshore Wind Turbines and Corrosive Action

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Kui Wang ◽  
Ming-jie Zhao
Keyword(s):  
Mathematical Model ◽  
Wind Turbine ◽  
Pile Foundation ◽  
Offshore Wind ◽  
Steel Pipe ◽  
Offshore Wind Turbine ◽  
Pipe Pile ◽  
Corrosion Of Steel ◽  
The Mathematical Model ◽  
Steel Pipe Pile

In this paper, the nonlinear corrosion model under the combined action of the anticorrosion system and corrosive environment is chosen as the mathematical model of homogeneous corrosion of steel pipe pile foundation for the offshore wind turbine. Based on the mathematical model, a three-dimensional finite element model was established for the steel pipe pile foundation of the offshore wind turbine. And the homogeneous corrosion action of the steel pipe piles was calculated, and the reduction rules of the strength and stability of the steel pipe piles for wind turbines under different corrosion patterns are analyzed. According to the calculation results, the mathematical model can be used in the analysis of corrosion for steel pipe pile in the wind turbine. Under the normal operation conditions, the reduction rules of the strength and stability of the steel pipe piles contain three stages: no influence stage, negative exponential decrease stage, and stable stage. But under the extreme load conditions, the effect of corrosion is enormous for the strength and stability of the steel pipe pile.

scholarly journals Small-signal modeling and stability analysis of grid-connected offshore wind power based on virtual synchronous generator control

2021 ◽  
Vol 2087 (1) ◽  
pp. 012055
Author(s):  
Lihu Dong ◽  
Danqing Song ◽  
Zhuo Chen
Keyword(s):  
Wind Power ◽  
Power Grid ◽  
Synchronous Generator ◽  
Offshore Wind ◽  
System Stability ◽  
Design Parameters ◽  
Stable Operation ◽  
Small Signal ◽  
Offshore Wind Power ◽  
Grid Connected Inverter

Abstract With the increasing installed capacity of offshore wind power, the grid-connected of offshore wind power technology based on virtual synchronous generators (VSG) control can simulate the inertia and damping characteristics of synchronous generator, which is helpful to improve the networking ability and inertial supportability of grid-connected inverter. However, VSG control also inevitably causes system oscillation, endangers the safe and stable operation of the power grid. Hence, the main circuit and control circuit of offshore wind power grid connection are firstly modeled, and the small-signal model of offshore wind power grid-connected inverter based on VSG control is obtained. Then the correctness of the model is verified by Matlab/Simulink software. Finally, the root trajectory method is used to identify the effects of VSG control parameters and line parameters on the system stability. The results show that VSG control has a significant influence on the stability of the grid-connected system, and reasonable design parameters are needed to ensure the safe and stable operation of the power grid.

scholarly journals Analysis on Calculated Length for Buckling Stability of Steel Pipe Pile Based on Energy Method

2017 ◽  
Vol 11 (1) ◽  
pp. 167-175 ◽  
Author(s):  
Wei Lu ◽  
Dong Zhao
Keyword(s):  
Energy Method ◽  
Variational Principles ◽  
Steel Pipe ◽  
Pipe Pile ◽  
Calculated Length ◽  
Buckling Stability ◽  
And Variational Principles ◽  
Pile Length ◽  
Steel Pipe Pile

According to the Winkler assumption, the form of the pile constraint could be simplified as bottom fixing and top free. Considering the influence from resistance of soil around pile, the equations on calculated length for buckling stability of steel pipe pile when the portions along the pile length were constrained in the uniform foundation and the layered foundation were respectively derived based on energy method and variational principles. And the application of the formulas was explained through examples. The equations are successfully applied in similar projects.

Field Test Research of Inclined Large-Scale Steel Pipe Pile Foundation for Offshore Wind Farms

2015 ◽  
Vol 73 ◽  
pp. 132-138 ◽  
Author(s):  
Shaolei Huo ◽  
Yang Chao ◽  
Guoliang Dai ◽  
Weiming Gong
Keyword(s):  
Field Test ◽  
Pile Foundation ◽  
Large Scale ◽  
Wind Farms ◽  
Offshore Wind ◽  
Steel Pipe ◽  
Offshore Wind Farms ◽  
Pipe Pile ◽  
Steel Pipe Pile

Study on the Lateral Bearing Capacity of Single-Helix Pile for Offshore Wind Power

2018 ◽  
Author(s):  
Hongyan Ding ◽  
Le Wang ◽  
Puyang Zhang ◽  
Conghuan Le
Keyword(s):  
Laboratory Test ◽  
Bearing Capacity ◽  
Wind Power ◽  
Research Laboratory ◽  
Offshore Wind ◽  
Pipe Pile ◽  
Offshore Wind Power ◽  
Steel Pipe Pile ◽  
Single Helix ◽  
Screw Pitch

To support a lighthouse, a trestle and other structures, screw pile has been used as the foundation for more than a hundred years. Because of its efficient installation, high bearing capacity and other advantages, increasing attention has been paid to use it as the offshore wind power foundation. In this research, laboratory test was conducted to study the influence of screw pitch and the diameter of helix on the lateral bearing capacity of single-helix pile, considering the effect of the installation. The results of the single-helix pile were compared with that of steel pipe pile and other methods. According to the test, helix diameter has negligible effect on the lateral bearing capacity of helical pile, but the pitch of helical influence that significantly because of more disturbance of soil.

scholarly journals Scenarios for offshore wind power production for Central California Call Areas

Wind Energy ◽  
2021 ◽  
Author(s):  
Yi‐Hui Wang ◽  
Ryan K. Walter ◽  
Crow White ◽  
Matthew D. Kehrli ◽  
Benjamin Ruttenberg
Keyword(s):  
Wind Power ◽  
Power Production ◽  
Offshore Wind ◽  
Central California ◽  
Offshore Wind Power
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