岩土力学2025，Vol.46Issue(5)：1563-1572,10.DOI:10.16285/j.rsm.2024.0883
考虑波致海床动态响应的单桩水平阻抗计算方法
A method for calculating horizontal impedance of a single pile considering wave-induced seabed dynamic response
摘要
Abstract
High-intensity wave loads in marine environments can induce stress changes in the seabed soil surrounding piles,affecting the bearing capacity of the embedded sections of single piles.Consequently,the wave-induced dynamic response of the seabed significantly affects the horizontal impedance of single piles in marine environments.This study models ocean waves as harmonic waves of specific frequencies and analyzes the seabed soil's dynamic response under linear wave loads using a fully dynamic(FD)model based on the soil's porous elastic assumption.The seabed soil's dynamic response results in a horizontal external load on the pile section.An analytical solution for calculating the horizontal impedance of a single pile is proposed using the Winkler foundation and Euler beam models to simulate the pile-soil system,and the transfer matrix method to address soil stratification.This formula comprehensively considers the impact of wave-induced seabed dynamic response on the pile's horizontal impedance.The validity of this method is verified through comparison with previous experimental results.Finally,the primary factors affecting the horizontal impedance of single piles under seabed dynamic response conditions are analyzed.The results show that the horizontal dynamic impedance of single piles in marine environments is related to wave intensity,pile diameter,and seabed soil parameters.The impact of seabed dynamic response on the horizontal impedance of single piles is mainly characterized by a wave in stiffness Kh and an increase in damping Ch within a certain frequency range.Outside this range,the pile impedance is similar to result obtained without considering the seabed dynamic response.Additionally,the impact frequency range expands with increasing pile diameter,pile-soil stiffness ratio and permeability coefficient.关键词
单桩基础/水平阻抗/波浪荷载/海床动态响应/Winkler地基Key words
single pile foundation/horizontal impedance/wave load/seabed dynamic response/Winkler foundation分类
土木建筑引用本文复制引用
杨明辉,蔡明辉,陈波,杨汉..考虑波致海床动态响应的单桩水平阻抗计算方法[J].岩土力学,2025,46(5):1563-1572,10.基金项目
国家自然科学基金资助项目(No.51678230) （No.51678230）
中铁南方投资集团有限公司科技研究开发计划项目(No.202208).This work was supported by the Natural Science Foundation of China(51678230)and the Science & Technology Research and Development Plan Project of China Railway Southern Investment Group Co.,Ltd.(202208). （No.202208）
