| 基于SHPB试验的多尺寸聚丙烯纤维混凝土动态力学性能研究 |
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| 引用本文： | 刘新荣,柯炜,梁宁慧,缪庆旭,杨鹏,郭哲奇. 基于SHPB试验的多尺寸聚丙烯纤维混凝土动态力学性能研究[J]. 材料导报, 2018, 32(Z1): 484-489 |
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| 作者姓名： | 刘新荣 柯炜 梁宁慧 缪庆旭 杨鹏 郭哲奇 |
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| 作者单位： | 重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室 |
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| 基金项目： | 国家自然科学基金(41372356)；2016重庆市研究生科研创新资助项目(CYS16005)；2017重庆市研究生科研创新资助项目(CYS17040) |
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| 摘 要： | 选用两种聚丙烯细纤维及一种聚丙烯粗纤维,制备了9组纤维掺量比不同的混凝土试件。采用变截面大尺寸分离式霍普金森压杆(SHPB)进行了冲击压缩试验,研究了在0.4 MPa冲击气压作用下,不同纤维掺量比对混凝土抗冲击性能的影响,基于引入损伤的Z-W-T本构模型对试验结果进行拟合分析。结果表明,单掺粗纤维可提高混凝土的整体性,且能显著提高混凝土破坏前的抗冲击性能,单掺细纤维主要是提高混凝土破坏后的抗冲击性能,而混掺纤维混凝土各个时期的抗冲击性能均得到提高,其中多尺寸纤维混掺的效果最好。
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| 关 键 词： | SHPB试验 多尺寸聚丙烯纤维混凝土 韧性 抗冲击性能 |
Study on the Dynamic Mech Anical Properties of Concrete Multi SizePolypropylene Fiber Based on SHPB Test |
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| LIU Xinrong,KE Wei,LIANG Ninghui,MIAO Qingxu,YANG Peng and GUO Zheqi. Study on the Dynamic Mech Anical Properties of Concrete Multi SizePolypropylene Fiber Based on SHPB Test[J]. Materials Review, 2018, 32(Z1): 484-489 |
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| Authors: | LIU Xinrong KE Wei LIANG Ninghui MIAO Qingxu YANG Peng GUO Zheqi |
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| Affiliation: | School of Civil Engineering, Chongqing University, Chongqing 400045;Key Laboratory of New Technologyfor Construction of Cities in Mountain Area of Ministry of Education,Chongqing University, Chongqing 400045,School of Civil Engineering, Chongqing University, Chongqing 400045;Key Laboratory of New Technologyfor Construction of Cities in Mountain Area of Ministry of Education,Chongqing University, Chongqing 400045,School of Civil Engineering, Chongqing University, Chongqing 400045;Key Laboratory of New Technologyfor Construction of Cities in Mountain Area of Ministry of Education,Chongqing University, Chongqing 400045,School of Civil Engineering, Chongqing University, Chongqing 400045;Key Laboratory of New Technologyfor Construction of Cities in Mountain Area of Ministry of Education,Chongqing University, Chongqing 400045,School of Civil Engineering, Chongqing University, Chongqing 400045;Key Laboratory of New Technologyfor Construction of Cities in Mountain Area of Ministry of Education,Chongqing University, Chongqing 400045 and School of Civil Engineering, Chongqing University, Chongqing 400045;Key Laboratory of New Technologyfor Construction of Cities in Mountain Area of Ministry of Education,Chongqing University, Chongqing 400045 |
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| Abstract: | Two kinds of polypropylene fine fibers and one kind of polypropylene crude fiber were used to prepare 9 kinds of concrete samples with different fiber content ratio. Variable cross section large-size separation of Hopkinson pressure bar(SHPB) was used to study the effect of different fiber content on the impact resistance of concrete under the action of 0.4 MPa impact air pressure,the test results are fitted based on Z-W-T damage constitutive model. The results show that the single blending of coarse fibers can improve the integrity of concrete and can improve the impact resistance before concrete failure. The single fine fiber is mainly to improve the impact resistance of concrete after breaking, and the mixed fiber concrete can improve the impact resistance at all times, of which the effect of multi-size mixed fiber is the best. |
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| Keywords: | SHPB test multi-size polypropylene fiber concrete toughness impact resistance |
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