摘要
在水工混凝土长期施工过程中,冻胀是导致混凝土裂缝产生和发展的因素之一。本文在前人研究基础之上,通过分析混凝土冻融特性,提出了随龄期变化的力学特性模型,并利用三维有限元仿真计算程序,对混凝土施工期可能产生的冻融破坏过程进行数值模拟,计算结果与实际冻胀开裂规律一致,故该研究可为工程施工过程设计提供理论依据。
During the long construction of hydraulic concrete,frost heave is one of the key factors which can result in concrete crack.Based on the previous studies and the analysis on freeze-thaw characteristics of concrete,new models for predicting elasticity coefficient and tensile strength with changes of age and freezing times were proposed.With the application of the 3-d finite element program,the process of frost heave damaging of concrete during construction period were simulated.Results showed that the calculated results had a good coincidence with the actual rules of crack.This research provides a useful reference for concrete projects.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第18期82-87,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金资助项目(50539010
51109081)
关键词
仿真模拟
混凝土建筑物
设计
冻融
computer simulation
concrete construction
design
freeze-thaw
