岩土工程学报2024，Vol.46Issue(z2)：49-53,5.DOI:10.11779/CJGE2024S20038
循环荷载作用下钢桩-软黏土接触面剪切特性研究
Shear characteristics of steel pile-soft clay interface under cyclic loading
摘要
Abstract
Recently,construction of offshore wind power has developed rapidly in China.However,the current design methods for the bearing capacity of pile foundations are often based on small-diameter flexible piles,which are not applicable to the real situation.At the same time,there are thick layers of clay in the field.Therefore,it is necessary to study the shear characteristics of the steel pile-soft clay interface to optimize the design method.The large-scale interface shear test model corresponding to the laboratory tests is established by using the numerical simulation software,and the values of the micro-parameters are validated.The simulated results fit the laboratory test results well,and the model can accurately reflect the pile-clay interaction during shearing.Based on this model,the shear characteristics of the steel-clay interface under different cyclic loading frequencies and amplitudes are analyzed.The results show that while the interface strength slightly decreases with the increase of the frequency and amplitude of cyclic loading,particularly the effects of the amplitude are more obvious.The mechanical response of clay from the mesoscopic scale is also analyzed.The greater the cyclic loading frequency and amplitude,the smaller the horizontal displacement of the particles.The research results can provide support to predict the bearing capacity of pile foundation of offshore wind power.关键词
钢桩-软黏土接触面/大型接触面剪切试验/循环荷载/数值模拟Key words
steel pile-soft clay interface/large-scale interface shear test/cyclic loading/numerical simulation分类
建筑与水利引用本文复制引用
周洁,朱柯凡,刘成君,沈盼盼..循环荷载作用下钢桩-软黏土接触面剪切特性研究[J].岩土工程学报,2024,46(z2):49-53,5.基金项目
国家自然科学基金面上项目(42477182) （42477182）
上海勘测设计研究院有限公司科研项目(2023FD(83)-001) （2023FD(83）
