洺河渡槽施工期温度应力仿真研究  

Simulation Study of Temperature Stresses in Construction in Minghe River Aqueduct Project

作　　者：刘爱军[1] 秦忠国[2] 张子明[2] 彭宣茂[2] 

机构地区：[1]武汉大学,武汉430072 [2]河海大学土木工程学院,南京210098

出　　处：《南水北调与水利科技》2006年第2期15-19,35,共6页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金资助项目(50379004)

摘　　要：用化学反应速率描述温度对混凝土绝热温升的影响,求解基于等效时间的非线性热传导方程,对南水北调工程 洺河渡槽施工期温度场和徐变应力场进行了仿真计算。研究表明,对于夏季和冬季浇筑的混凝土,采用基于等效时间的混凝土绝热温升理论和传统理论的计算结果有较大差异。Hydration rate is adopted to describe the combined effect on adiabatic temperature rise. A new non-linear heat conduction equation based on equivalent time is applied to solve the temperature field and stress field of Ming River Aqueduct Project. The study shows there is big difference between the results computed by use of the heat conduction equation based on equivalent time and traditional heat conduction equation during winter and summer construction.

关 键 词：化学反应速率 绝热温升 等效时间 非线性热传导方程 

分 类 号：TV68[水利工程—水利水电工程]