混凝土早期徐变对开裂敏感性的影响  

CREEP OF CONCRETE AT EARLY AGE AND ITS EFFECT ON CRACKING SENSITIVITY

作　　者：张涛[1] 覃维祖[1] 

机构地区：[1]清华大学土木工程系建筑材料研究所,北京100084

出　　处：《工业建筑》2005年第8期89-92,105,共5页Industrial Construction

摘　　要：混凝土的开裂敏感度主要是由早期应力发展决定,早期徐变是影响由自生收缩与温度变形引起的混凝土约束应力发展的重要因素。研究了约束条件下混凝土的早期徐变松弛性质,以及应力松弛对混凝土早期开裂敏感性的影响。The cracking sensitivity of concrete is determined by the stress development at early age, and the creep of young concrete is an important factor influencing the development of restrained stresses in concrete structures due to autogenous contraction and thermal deformation. It is studied that the properties of creep ifi restrained concrete at early age, and the effect of creep/relaxation on cracking sensitivity of concrete.

关 键 词：徐变/松弛 收缩 约束条件 开裂敏感性 混凝土 早期 徐变 约束应力 温度变形 自生收缩 

分 类 号：TU375[建筑科学—结构工程]