| 基于细观损伤的混凝土破裂过程的三维数值模拟与CT试验验证 |
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| 引用本文： | 田 威,党发宁,陈厚群.基于细观损伤的混凝土破裂过程的三维数值模拟与CT试验验证[J].岩土力学,2010,31(Z2):428-433. |
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| 作者姓名： | 田 威 党发宁 陈厚群 |
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| 作者单位： | 1. 长安大学 建筑工程学院，西安 710061；2.西安理工大学 岩土工程研究所，西安 710048； 3. 中国水利水电科学研究院 工程抗震中心，北京 100044 |
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| 基金项目： | 国家自然科学基金(No. 51009010， No. 50679073)；中央高校科研事业费资助项目(No.CHD2010JC114)。 |
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| 摘 要： | 在混凝土细观损伤的CT试验基础上,以密度损伤(CT数变化)变量为基础,建立了混凝土分段损伤演化方程,以此进行了混凝土试件单轴受压的细观损伤数值模拟。并从混凝土破坏图和荷载-位移曲线图两方面比较了数值模拟结果与CT试验结果,结果表明,试件破坏时裂纹扩展过程与CT观测到的相似,实现了将细观密度损伤(CT数变化)与试件的宏观力学性能的劣化相联系,为改进试验设计提供了力学依据,并使在可靠和有效的前提下用数值方法取代部分试验成为可能。
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| 关 键 词： | 混凝土 细观损伤 损伤变量 数值模拟 CT试验 |
| 收稿时间： | 2010-07-29 |
3D numerical simulation of concrete failure process and CT verification based on meso-damage |
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| TIAN Wei,DANG Fa-ning,CHEN Hou-qun.3D numerical simulation of concrete failure process and CT verification based on meso-damage[J].Rock and Soil Mechanics,2010,31(Z2):428-433. |
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| Authors: | TIAN Wei DANG Fa-ning CHEN Hou-qun |
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| Institution: | 1.School of Civil Engineering, Chang'an University, Xi’an 710061, China； 2.Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China； 3. China Institute of Water Resources and Hydropower Research, Beijing 100044, China |
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| Abstract: | Based on CT test of concrete meso-damage, segmentation equation of damage evolution is established based on the density damage (CT number changes) variable; then, the meso-damage of concrete specimen is numerically simulated under unaxial compression. The results of numerical simulation and CT test is compared and analyzed in failure chart of concrete and curve chart of load-displacement. The results shows that the crack propagation is similar to the result of CT; the concrete meso-damage associate with the degradation of macro- mechanical properties is accomplished. So the study provides mechanical basis to improve test design. At the same time, it make possible that the numerical method replaces of some test in a reliable and effective promise. |
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| Keywords: | concrete meso-damage damage variable numerical simulation CT test |
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