Experimental Study on the Cyclic Behavior of Monopiles in Fine Sandy Beds Under Regular Waves  

作　　者：HUANG Ting ZHENG Jin-hai ZHANG Ji-sheng YUAN Yu WU Bin 

机构地区：[1]Key Laboratory of Coastal Disaster and Defence,Ministry of Education,Hohai University [2]College of Harbor,Coastal and Offshore Engineering,Hohai University

出　　处：《China Ocean Engineering》2017年第5期607-617,共11页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.51408185);the Fundamental Research Funds for the Central Universities(Grant No.2017B15714)

摘　　要：This paper presents an experimental study on the wave-induced behavior of monopiles. Laboratory experiments were conducted at the constant initial state of the sandy beds in a wave flume with a soil trench. The responses of the pile- head displacement, the pile strain and the pore water pressure on regular waves were investigated. The experimental results show that the monopiles lean along the direction of the wave progression and the inclination increases with the duration of wave actions. The pile-head displacement （consisting of the permanent displacement and cyclic displacement） increases as the wave height increases, especially more significantly for the permanent displacement. The head-fixed pile suffers from larger wave load than that on the head-free pile under the same wave condition. Increasing pile diameter or fixing fins on the monopile is effective in reducing the pore water pressure in the upper part of the bed and the permanent displacement.This paper presents an experimental study on the wave-induced behavior of monopiles. Laboratory experiments were conducted at the constant initial state of the sandy beds in a wave flume with a soil trench. The responses of the pile- head displacement, the pile strain and the pore water pressure on regular waves were investigated. The experimental results show that the monopiles lean along the direction of the wave progression and the inclination increases with the duration of wave actions. The pile-head displacement （consisting of the permanent displacement and cyclic displacement） increases as the wave height increases, especially more significantly for the permanent displacement. The head-fixed pile suffers from larger wave load than that on the head-free pile under the same wave condition. Increasing pile diameter or fixing fins on the monopile is effective in reducing the pore water pressure in the upper part of the bed and the permanent displacement.

关 键 词：MONOPILE fine sandy bed DISPLACEMENT wave load pore water pressure 

分 类 号：P731.2[天文地球—海洋科学] TM614[电气工程—电力系统及自动化]