水文地质工程地质2025，Vol.52Issue(5)：88-97,10.DOI:10.16030/j.cnki.issn.1000-3665.202404046
考虑时效损伤的砂泥岩填料分数阶蠕变模型
A fractional order creep model for sandstone and mudstone fillers xonsidering time damage
摘要
Abstract
The creep characteristics of fillers in water transportation engineering are related to the long-term stability of dock foundations.However,limited studies focused on the creep model of sandstone and mudstone fillers.To construct a constitutive model that can accurately describe the creep characteristics of sandstone and mudstone fillers,shear creep tests were conducted under different mix ratio conditions.Based on experimental results,the basic model is determined,and a new fractional order creep model considering time-dependent damage is constructed by combining Riemann-Liouville fractional calculus operator theory and damage mechanics theory.Model validation analysis found that as the content of mudstone particles increases,the long-term strength of sandstone and mudstone fillers gradually decreases,promoting the development of filler damage.Sensitivity analysis reveals that the model parameters ηα1,ηα2,α1,and α2 influence the model response in descending order of sensitivity:ηα2＞ηα1＞α2＞α1.The simulated values of the new model are consistent with the experimental data of sandstone and mudstone fillers,with an average R2 of 0.99,proving the feasibility and rationality of the new model.This achievement provides the valuable insight for understanding the creep characteristics of sandstone and mudstone fillers and the long-term stability of dock foundations.关键词
砂泥岩填料/泥岩颗粒含量/时效损伤/分数阶/蠕变模型Key words
sandstone and mudstone fillers/mudstone particle content/aging damage/fractional order/creep model分类
建筑与水利引用本文复制引用
陶澄臻,黄海健,袁后培,江信东,曹利军..考虑时效损伤的砂泥岩填料分数阶蠕变模型[J].水文地质工程地质,2025,52(5):88-97,10.基金项目
山东省自然科学基金项目(ZR2018BEE050) （ZR2018BEE050）
