细观尺度下水工混凝土水中拉压徐变试验数值反馈  

Numerical Feedback Under Mesoscale Based on Tension/Compression Creep Test of Hydraulic Concrete in Water

作　　者：邵成羽 方国宝 徐小枫 黄耀英[1] SHAO Cheng-yu;FANG Guo-bao;XU Xiao-feng;HUANG Yao-ying(College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,China;Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430000,China;PowerChina Guiyang Engineering Corporation Limited,Guiyang 55o081,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]长江勘测规划设计研究院,湖北武汉430000 [3]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《水电能源科学》2023年第10期154-157,162,共5页Water Resources and Power

基　　金：国家自然科学基金项目(52179135,51779130)。

摘　　要：针对目前尚缺少从细观尺度研究水工混凝土水中徐变特性的问题,通过建立骨料—砂浆—过渡层的混凝土试件细观有限元模型,基于水工混凝土水中拉伸、压缩徐变试验数据,采用正交设计—神经网络—细观有限元计算相结合的方法,反演了水工混凝土试件细观尺度下砂浆的拉伸、压缩徐变度,最后对比分析了水工混凝土和砂浆拉伸、压缩徐变度的关系。结果表明,水工混凝土水中状态与密封状态下拉压徐变度变化规律相似;不论拉伸徐变还是压缩徐变,砂浆水中徐变度约为水工混凝土水中徐变度的2.4倍。In view of the lack of research on the creep characteristics of hydraulic concrete in water from mesoscale scale,a meso-finite element model of concrete specimen of "aggregate-mortar-transition layer" was established.Based on the test data of tensile and compressive creep in water,the method of "orthogonal design-neural network-meso-finite element calculation" was adopted to implement the inversion analysis of the tensile and compressive specific creep of hydraulic concrete specimens at mesoscale.Finally,the relationship between tensile and compressive specific creep of hydraulic concrete and mortar was compared.The results show that the variation law of tension creep degree of hydraulic concrete in water is similar to that in sealed.The creep degree of mortar water is 2.4 times of hydraulic concrete water under conditions of tensile and compressive creep.

关 键 词：水工混凝土 水中徐变 细观有限元计算 砂浆徐变度 优化反演 

分 类 号：TV43[水利工程—水工结构工程]