Failure Envelopes of Wide-Shallow Composite Bucket Foundation for Offshore Wind Turbines in Silty Sand

作     者：Yonggang Liu Yaohua Guo Hongyan Ding Puyang Zhang 

作者机构：State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin University School of Civil EngineeringTianjin University 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2018年第24卷第2期

页      面：182-190页

核心收录：

学科分类：040106[教育学-高等教育学] 0401[教育学-教育学] 04[教育学] 

基　　金：supported by the National Natural Science Foundation of China (No.51379142 and No.51679163) Innovation Method Fund of China (No.2016IM030100) the Tianjin Municipal Natural Science Foundation (No.17JCYBJC22000) 

主　　题：Wide-shallow composite bucket foundation Silty sand Off shore wind turbines 

摘      要：The wide-shallow composite bucket foundation(WSCBF) is a new type of offshore wind power foundation that can be built on land and rapidly installed offshore, there by effectively reducing the construction time and costs of offshore wind power foundation. In this study, the horizontal bearing capacity is calculated by finite element simulation and compared with test results to verify the validity of results. In this process, the vertical load and bending load are respectively calculated by the finite element simulation. Under the vertical load effect, the bucket foundation and the soil inside are regarded as a whole, and the corresponding buckling failure mode is obtained. The ultimate vertical bearing capacity is calculated using empirical and theoretical formulas; the theoretical formula is also revised by finite element results. Under bending load, the rotational center of the composite bucket foundation(in a region close to the bucket bottom) gradually moves from the left of the central axis(reverse to loading direction) to the nearby compartment boards along the loading direction. The H–M envelope line shows a linear relationship, and it is determined that the vertical and bending ultimate bearing capacities can be improved by an appropriate vertical load.