|
|||||
|
|
| 再生混凝土疲劳损伤演化的定量描述 | |
| 引用本文： | 肖建清,丁德馨,骆行文,徐根. 再生混凝土疲劳损伤演化的定量描述[J]. 中南大学学报(自然科学版), 2011, 42(1) |
| 作者姓名： | 肖建清 丁德馨 骆行文 徐根 |
| 作者单位： | 1. 安阳师范学院,建筑工程学院,河南,安阳,455002;中南大学,资源与安全工程学院,湖南,长沙,410083 2. 中南大学,资源与安全工程学院,湖南,长沙,410083 3. 中国科学院武汉岩土力学研究所,湖北,武汉,430071 |
| 基金项目： | 国家青年自然科学基金资助项目(11002067); 湖南省教育厅基金资助项目(07C652,08C764); 湖南省安监局基金资助项目(07-17,07-29) |
| 摘 要： | 利用再生混凝土的疲劳试验结果,分析常用的几种损伤变量定义法的优缺点;其次,根据疲劳损伤的三阶段演化规律,提出倒S非线性疲劳累积损伤模型,给出材料参数的物理含义及取值范围;最后,基于倒S模型研究再生混凝土的损伤演化规律和疲劳寿命。分析结果表明,弹性模量法、超声波速法、最大应变以及残余应变法都能够反映再生混凝土的疲劳损伤演化规律,而残余应变法由于概念明确,考虑疲劳初始损伤,因此更为合适;拟合得到的损伤演化方程与试验数据高度相关,而理论分析得出的疲劳寿命的变化规律与试验结果也相一致;倒S模型涵盖了损伤演化规律的各种类型,具有适应性强、精度高的特点,适用于混凝土材料的损伤演化描述。 |
| 关 键 词： | 再生混凝土 损伤变量 损伤模型 疲劳寿命 |
Quantitative analysis of damage evolution as recycled concrete approaches fatigue failure |
|
| XIAO Jian-qing,DING De-xin,LUO Xing-wen,XU Gen. Quantitative analysis of damage evolution as recycled concrete approaches fatigue failure[J]. Journal of Central South University:Science and Technology, 2011, 42(1) | |
| Authors: | XIAO Jian-qing DING De-xin LUO Xing-wen XU Gen |
| Affiliation: | XIAO Jian-qing1,2,DING De-xin2,LUO Xing-wen3,XU Gen2 (1.School of Civil Engineering and Architecture,Anyang Normal University,Anyang 455002,China,2.School of Resources and Safety Engineering,Central South University,Changsha 410083,3.Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China) |
| Abstract: | Advantages and disadvantages of several common damage defined methods were studied with test data of recycled concrete.Secondly,an inverted-S nonlinear fatigue damage cumulative model was proposed based on the three-phase law of fatigue damage evolution and physical meanings and ranges of its parameters were discussed.Eventually,the damage evolution and fatigue life of recycled concrete were investigated using the inverted-S damage model.The results indicate that many methods such as elastic modulus method,... |
| Keywords: | recycled concrete damage variable damage model fatigue life |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |