| 混凝土材料裂纹尖端应力场的研究 |
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| 引用本文： | 周绍青,郭少华.混凝土材料裂纹尖端应力场的研究[J].武汉理工大学学报,2011(10):78-82. |
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| 作者姓名： | 周绍青 郭少华 |
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| 作者单位： | 东莞市新远高速公路发展有限公司;中南大学土木建筑学院; |
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| 基金项目： | 国家自然科学基金(10672189) |
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| 摘 要： | 为了准确地预测混凝土类材料复合断裂韧度及裂纹扩展路径,提出了结合T应力的修正最大周向应力断裂判据。该修正最大周向应力判据采用双参数模型(应力强度因子K和T应力)来描述混凝土断裂行为。在对三相材料混凝土断裂进行理论计算时,通过应用westergard应力函数,并利用级数展开求解了裂纹尖端的T应力和应力强度因子。计算结果表明,内聚物的性质和T应力能影响断裂韧度及裂纹尖端的应力,这为模拟混凝土断裂提供了依据。
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| 关 键 词： | 混凝土 双参数模型 T应力 三相材料 |
Research on the Crack Tip Stress Field of the Concrete |
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| ZHOU Shao-qing,GUO Shao-hua.Research on the Crack Tip Stress Field of the Concrete[J].Journal of Wuhan University of Technology,2011(10):78-82. |
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| Authors: | ZHOU Shao-qing GUO Shao-hua |
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| Affiliation: | ZHOU Shao-qing1,GUO Shao-hua2(1.Dongguan Xinyuan Expressway Development Co Ltd,Dongguan 523120,China,2.School of Civil Engineering and Architecture,Central South University,Changsha 410083,China) |
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| Abstract: | In order to predict the fracture toughness and propagation of the mixed mode fracture of the concrete,the modified MTS(maximum tangential stress) criterion combined with T-stress is presented.The two-parameter model(stress intensity factor K and T-stress) is used to describe the concrete's fracture in the modified MTS criterion.In the three-phase materials of concrete fracture theoretical analysis,analytical formulas for calculating the T-stress as well as stress intensify factors are given by using westerg... |
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| Keywords: | concrete two-parameter model T-stress the three-phase materials |
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