|
|||||
|
|
| 冻融循环作用下混凝土结构寿命分析 | |
| 引用本文： | 李春生,陈胜宏,何真,谷晓萍. 冻融循环作用下混凝土结构寿命分析[J]. 武汉大学学报(工学版), 2010, 43(2) |
| 作者姓名： | 李春生 陈胜宏 何真 谷晓萍 |
| 作者单位： | 1. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072;沈阳农业大学,辽宁,沈阳,110161 2. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072 3. 沈阳农业大学,辽宁,沈阳,110161 |
| 基金项目： | 国家973计划项目(编号:2009CB623201); 国家自然科学基金资助(编号:50972109) |
| 摘 要： | 分析混凝土冻融试验资料,推导出混凝土的粘聚力c及内摩擦角φ值与混凝土冻融循环次数N、未冻融前单轴抗拉强度ft0及单轴抗压强度fc0的关系公式;推导出弹性模量E及泊松比μ与混凝土冻融循环次数N的关系公式;通过联系实验室冻融和现场冻融的等效室内冻融循环次数公式,得出等效室内冻融循环次数的经历时间.然后采用有限单元法对混凝土结构在冻融循环条件下的应力、应变及屈服状态进行分析,并对其寿命进行预测.最后,采用此方法,预测了一个混凝土简支梁结构的寿命. |
| 关 键 词： | 有限单元法 冻融循环 混凝土结构 寿命 |
Analysis of concrete structure life under freezing thawing cycle conditions |
|
| LI Chunsheng,CHEN Shenghong,HE Zhen,GU Xiaoping. Analysis of concrete structure life under freezing thawing cycle conditions[J]. Engineering Journal of Wuhan University, 2010, 43(2) | |
| Authors: | LI Chunsheng CHEN Shenghong HE Zhen GU Xiaoping |
| Affiliation: | LI Chunsheng1,2,CHEN Shenghong1,HE Zhen1,GU Xiaoping2(1.State Key Laboratory of Water Resources , Hydropower Engineering Science,Wuhan University,Wuhan 430072,China,2.Shenyang Agricultural University,Shenyang 110161,China) |
| Abstract: | Through analyzing the test data,a formula reflecting the relationship among the cohesion c,internal friction angle ,and concrete freeze-thaw cycle times N,uniaxial tensile strength ft0,uniaxial compressive strength fc0,is deduced.And them a formula reflecting the relationship between the elastic modulus E,Poisson's ratio μ and concrete freeze-thaw cycle times N,is also deduced.This paper makes use of the formula for the calculation equivalent numbers of freezing-thawing cycles in laboratory,which can connect different freezing-thawing environments in laboratory and field.The FEM is applied to analyze stress/strain and yield of the concrete structure.Based on the calculation,the life of the concrete structure can be estimated.The life of a beam is studied as an example with this method. |
| Keywords: | FEM freezing-thawing cycles concrete structure life |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |