华中科技大学学报：自然科学版2012，Vol.40Issue(2)：45-48,4.
基于等效时间的混凝土水管冷却等效热传导
Study on equivalent heat conduct of concrete using pipe cooling and equivalent time
摘要
Abstract
The maturity function of equivalent time was used to descri tion process under different temperature histories. Taking into account tions were made on equivalent heat conduct of concrete by pipe cooling. be the status of cement hydradegree of hydration, investiga- The finite element formulationwas proposed for heat conduct of pipe cooling associated with equivalent time, and the finite element codes were developed. When the concrete＇s average temperature with heat source and pipe cooling was calculated, equivalent time increment of every （;auss point and every step should be stored. Equivalent time increment interval was obtained by time increment interval. Then the hydration heat increment considering concrete degree of hydration in this time increment interval was calculated. The ana- lyses of concrete temperature and creep stress were conducted in a concrete engineering, where con- crete pouring was carried out in the hot weather and measures like pre cooling aggregate and pipe cool ing were taken. It is revealed that within the temperature of 12-27℃, the resulting maximum increase in concrete temperature is 1. 022℃ if considering degree of hydration, while difference in creep stress is minor.关键词
水化度/等效时间/水管冷却/等效热传导/温度/徐变应力Key words
hydration/equivalent time/pipe cooling/equivalent heat conduct/temperature/creepstress分类
建筑与水利引用本文复制引用
黄耀英,郑宏,夏开文,周宜红..基于等效时间的混凝土水管冷却等效热传导[J].华中科技大学学报：自然科学版,2012,40(2):45-48,4.基金项目
国家杰出占年基金资助项目 （）
国家自然科学基金资助项目（51079079）. （）
