哈尔滨工程大学学报2018，Vol.39Issue(1)：40-46,7.DOI:10.11990/jheu.201611094
受约束混凝土早龄期温湿度应力计算
Calculation of moisture-temperature induced stress in early-age restrained concrete
摘要
Abstract
This study aimed to explore the change law of early-age stress and crack risk of concrete-constrained com-ponents under dry shrinkage and temperature.With a restrained concrete prism component as an example, a calcu-lation method for the early-age shrinkage stress of the restrained concrete components under the action of moisture field and temperature was developed.Relaxation and creepage coefficient were applied to revise the effect of con-crete creepage.The model was adopted for the calculation and analysis of the stress and strain of concrete compo-nents under different environmental humidity, temperature changes within a single day, and constraints.Results show that a high degree of restraint led to large stress and risk of cracking.When the moisture of the environment was close to the internal humidity of concrete, the greatest effects on the stress and strain of concrete were ob-served.A sudden decrease in temperature within a single day apparently affected the stress and strain of concrete lying within the age of 4 days.Therefore, the inside and outside constraint conditions and environmental humidity were the main factors affecting stress changes in early age.关键词
混凝土/差分方程/湿度场/湿度变形/温度应力/徐变系数/早龄期Key words
concrete/difference equation/moisture field/moisture deformation/temperature stress/creep coeffi-cient/early-age分类
建筑与水利引用本文复制引用
尤伟杰,王有志,谌菊红,安然,徐刚年..受约束混凝土早龄期温湿度应力计算[J].哈尔滨工程大学学报,2018,39(1):40-46,7.基金项目
国家自然科学基金项目(11372165). （11372165）
