| 钢纤维掺入对混凝土管片局部力学性能的改善 |
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| 引用本文： | 莫海鸿,陈俊生,梁松,杨医博,苏轶. 钢纤维掺入对混凝土管片局部力学性能的改善[J]. 华南理工大学学报(自然科学版), 2007, 35(7): 116-121 |
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| 作者姓名： | 莫海鸿 陈俊生 梁松 杨医博 苏轶 |
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| 作者单位： | 华南理工大学,建筑学院,广东,广州,510640;华南理工大学,建筑学院,广东,广州,510640;华南理工大学,建筑学院,广东,广州,510640;华南理工大学,建筑学院,广东,广州,510640;华南理工大学,建筑学院,广东,广州,510640 |
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| 摘 要： | 为评价钢纤维掺入对盾构隧道混凝土管片局部力学性能的改善情况,采用通用有限元软件AD INA,分别对盾构隧道钢纤维混凝土管片在千斤顶顶力作用及管片接头在正常运营阶段的开裂荷载、应力分布及裂缝分布进行了三维有限元数值试验.结果表明:掺入钢纤维能有效改善管片表面、手孔和螺栓孔部位的局部力学性能;钢纤维混凝土管片的初裂荷载比普通混凝土管片提高13.3%～22.7%,说明管片的抗裂性能有较大提高.
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| 关 键 词： | 钢纤维 混凝土 盾构隧道 管片 力学性能 |
| 文章编号： | 1000-565X（2007）07-0116-06 |
| 修稿时间： | 2006-09-06 |
Improvement of Local Mechanical Properties of Concrete Segment by Steel-Fiber Reinforcement |
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| Mo Hai-hong,Chen Jun-sheng,Liang Song,Yang Yi-bo,Su Yi. Improvement of Local Mechanical Properties of Concrete Segment by Steel-Fiber Reinforcement[J]. Journal of South China University of Technology(Natural Science Edition), 2007, 35(7): 116-121 |
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| Authors: | Mo Hai-hong Chen Jun-sheng Liang Song Yang Yi-bo Su Yi |
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| Affiliation: | School of Architecture and Civil Engineering, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China |
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| Abstract: | In order to reveal the effect of steel-fiber reinforcement on the local mechanical properties of concrete segments used in shield tunnels,a general 3D finite element code,ADINA,was used to numerically analyze the cracking loads,stress distributions and crack distributions of the steel fiber-reinforced concrete(SFRC) segment under the jacking force or in a regular service stage.The results indicate that the addition of steel fibers can effectively improve the local mechanical properties of segment surface,hand holes and bolt holes,greatly enhance the anti-crack performance of SFRC segment,and make the first-crack load 13.3%~22.7% greater than that of the original reinforced concrete segment. |
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| Keywords: | steel fiber concrete shield tunnel segment mechanical property |
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