冻融与碳化交替作用下混凝土损伤模型  

The Damage Model of Concrete under the Alternate Action of Freeze-thaw Damage and Carbonization

作　　者：周晓明[1] 蒋林华[1,2] 濮琦[1] 杜宇[1] 李洋[3] 

机构地区：[1]河海大学力学与材料学院,南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [3]江苏省交通科学研究院长大桥梁健康检测与诊断技术交通行业重点实验室,南京211112

出　　处：《南水北调与水利科技》2009年第6期234-236,266,共4页South-to-North Water Transfers and Water Science & Technology

基　　金："十一五"国家科技支撑计划重大项目"大流量预应力渡槽设计与施工技术研究"(2006BAB04A05)

摘　　要：应用损伤力学和断裂力学理论,求解出冻胀力作用下混凝土裂纹扩展前后的应变能,建立了基于能量守恒原理的裂纹扩展和损伤模型,并从细观裂纹扩展角度探讨了碳化对冻融的影响,提出了冻融与碳化交替作用时混凝土的损伤模型。研究表明,两者交替作用下,渡槽混凝土冻融损伤有所延缓。Applying the theories of damage mechanics and fracture mechanics,models of crack expansion and freeze-thaw damage were built based on the law of conservation of energy.And the influence between freeze-thaw damage and carbonization was explored in terms of microcosmic crack expansion.The results indicated that freeze-thaw damage was postponed under the alternate action.

关 键 词：渡槽 冻融与碳化交替 耐久性 能量守恒原理 

分 类 号：TV431[水利工程—水工结构工程]