| 液体表面张力对混凝土断裂能及其应变软化的影响 |
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| 引用本文： | 孙志伟,任昭君,赵铁军.液体表面张力对混凝土断裂能及其应变软化的影响[J].工程设计与建设,2007(3). |
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| 作者姓名： | 孙志伟 任昭君 赵铁军 |
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| 作者单位： | 青岛理工大学土木工程学院 青岛266033 |
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| 基金项目： | 国家自然基金项目(批准号:50378045) |
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| 摘 要： | 为研究混凝土中水分含量及浸泡混凝土液体表面张力对混凝土断裂能的影响,通过切口梁三点弯曲试验测定混凝土的断裂能的方法对全干燥、半干燥、水浸泡和海水浸泡四组混凝土试件进行了测试,并用CONSOFT软件对试验曲线进行了拟合。试验表明混凝土随着所含水分的增加其断裂能减小;浸泡混凝土液体的表面张力越大,混凝土的表面能越小,其断裂能也越小。海水对混凝土断裂能的影响是最显著的。
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| 关 键 词： | 三点弯曲 断裂能 应变软化 |
Influence of liquid surface tension on the concrete fracture energy and its strain softening |
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| Authors: | Sun Zhiwei Ren Zhaojun Zhao Tiejun |
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| Abstract: | To study the influence of moisture content and surface tension of immersed liquids on the fracture energy of concrete,three-point bending test with precrack was used to determine the fracture energy in such four test pieces as fully dried,semi-dried,water saturated and seawater saturated concretes.Test curves were fitted using the CONSOFT software.The test indicates that fracture energy decreases with the increase of water content,and fracture energy becomes lower when the surface tension of immersed liquids is larger.The influence of seawater on the concrete fracture energy is remarkable. |
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| Keywords: | three-point bending fracture energy strain softening |
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