混凝土结构早龄期开裂的分析与预测  

Analysis and Forecast of Concrete Structure Cracking at arly Age

作　　者：王甲春[1] 阎培渝[2] 余红发[3] 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168 [2]清华大学土木系,北京100084 [3]南京航空航天大学土木系

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第1期85-87,共3页Journal of Shenyang Jianzhu University：Natural Science

基　　金：863项目(2003AA33X100);建设部科技项目(02-3-1.7)

摘　　要：目的预测混凝土结构早龄期开裂的可能性.方法以可靠度理论为基础,建立了混凝土结构早龄期开裂的分析模型,利用开裂概率和临界开裂风险来分析与预测混凝土结构早龄期的开裂情况,并将分析模型在混凝土挡土墙工程中应用.结果混凝土挡土墙分析模型的预测结果与观测结果基本一致.结论应用开裂概率和临界开裂风险来分析与预测混凝土结构早龄期开裂,可以优选混凝土材料的组成,尽量减少混凝土结构早龄期的开裂.The probability of concrete structure cracking at early age is estimated by cracking probability and critical cracking risk with probabilistic method for a real case of concrete wall. The analysis model of cracking is based on the theory of reliability of structures. The sensitivity coefficients calculated by this model can express the influencing efficiency of the temperature change in structure and shrinkage on the cracking of concrete structure in early age. The calculation results show that cracking probability and critical cracking risk can be applied to analysis and forecast of concrete wall cracking. It is helpful to optimize concrete proportion and reduce the concrete structure cracking through the forecast and analysis of concrete structure.

关 键 词：混凝土结构 开裂概率 临界开裂风险 早龄期 预测 

分 类 号：TU528[建筑科学—建筑技术科学]