| 钢纤维自密实高性能混凝土抗剪韧性的试验研究 |
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| 引用本文： | 刘思国,丁一宁. 钢纤维自密实高性能混凝土抗剪韧性的试验研究[J]. 建筑结构学报, 2008, 29(Z1): 52-56 |
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| 作者姓名： | 刘思国 丁一宁 |
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| 作者单位： | 大连理工大学海岸和近海工程国家重点实验室; |
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| 基金项目： | 国家自然科学基金(50578026) |
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| 摘 要： | 钢纤维自密实高性能混凝土是具有高工作度和高韧性的结构材料。抗剪强度和剪切韧性是梁、板、柱等构件受力分析的重要参数。本文参照国际上先进的试验方法,采用改进的单面直接剪切试验的方法,研究了钢纤维自密实高性能混凝土的剪力-剪切滑移全曲线,分析了受剪试件抗剪强度和初裂剪切滑移值以及混凝土受剪状态下的变形能,并以此为基础计算等效抗剪强度。研究结果表明,钢纤维可改善混凝土基体的抗剪强度,显著提高基体的剪切韧性;随着纤维掺量增加,钢纤维对自密实高性能混凝土的增强增韧效果也相应增加;改进的单面直接剪切试验方法和建议的剪切韧性评价方法适合于钢纤维混凝土抗剪强度和剪切韧性研究。
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| 关 键 词： | 初裂剪切滑移值 单面直接剪切试验 钢纤维 剪切韧性 自密实高性能混凝土 |
Experimental study on the shear toughness of steel fiber reinforced self-compacting high performance concrete |
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| LIU Siguo,DING Yining. Experimental study on the shear toughness of steel fiber reinforced self-compacting high performance concrete[J]. Journal of Building Structures, 2008, 29(Z1): 52-56 |
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| Authors: | LIU Siguo DING Yining |
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| Affiliation: | LIU Siguo,DING Yining(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,China) |
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| Abstract: | Steel fiber reinforced self-compacting high performance concrete(SFRSCHPC) shows significant advantages in workability and toughness.Shear strength and shear toughness are important parameters for members mechanical analysis.In this paper,modified compact shear test are carried out,the research results on shear behavior of SFRSCHPC,including shear-slip curve,shear strength,the first crack slip,and the shear toughness,were presented.Steel fiber can obviously improve the shear strength,and significantly increase shear toughness;the shear strength and shear toughness increase with the increment of fiber dosage.The modified compact shear test and proposal method can be used to evaluate the shear strength and shear toughness. |
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| Keywords: | self-compacting high performance concrete compact shear test first crack slip shear toughness |
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