长江科学院院报2018，Vol.35Issue(6)：107-110,4.DOI:10.11988/ckyyb.20170190
大坝混凝土分数阶徐变模型探讨
A Fractional Order Creep Model of Dam Concrete
摘要
Abstract
Concrete,a creep material between ideal solid and fluid,is related to loading age and load-bearing time. In this article,the fractional order calculus model is applied to the analysis of concrete's creep.A fractional order creep model with five parameters is established based on the generalized Kelvin model with software components. Furthermore,according to measured creep values of three engineering cases,the five parameters of the established fractional order creep model are inverted and optimized by using the complex optimization algorithm.The expres-sions of concrete creep model in consideration of loading age are given.Engineering case study demonstrates that the calculated values of the fractional order model agree well with test values,close to those of eight-parameter model. Fractional order model could be a new approach in creep analysis of concrete.关键词
混凝土/分数阶微积分/徐变模型/优化拟合/加载龄期Key words
concrete/fractional order calculus/creep model/optimization algorithm/loading age分类
建筑与水利引用本文复制引用
刘钰,黄耀英,唐腾飞,肖磊,高俊..大坝混凝土分数阶徐变模型探讨[J].长江科学院院报,2018,35(6):107-110,4.基金项目
国家自然科学基金项目(51779130) （51779130）
