玄武岩纤维活性粉末混凝土动态压缩性能研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-04 DOI:10.1680/jadcr.23.00007

Haiyang Sha, Jinchun Liu, Xianwen Fu

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引用次数: 0

摘要

将玄武岩纤维(BFs)代替钢纤维掺入活性粉末混凝土(RPC)中制备玄武岩纤维活性粉末混凝土(BFRPC)。在本研究中，我们通过实验和数值分析了BFRPC在不同应变速率(101 ~ 101 s1)下的抗冲击性。采用Φ75mm Split Hopkinson压杆(SHPB)进行冲击压缩试验，采用LS-DYNA有限元软件进行数值模拟分析。结果表明:高强度BFRPC具有明显的应变速率效应，抗压强度动态生长因子(DIF)随应变速率呈对数增长;同时，对CEB模型参数进行了修正，建立了应变速率与DIF之间的关系。采用Johnson_Holmquist_Concrete材料本构模型(HJC模型)，得到的应力-应变曲线和破坏模式与试验结果一致。BFs的加入显著改善了BFRPC的变形性能。

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Investigation of dynamic compression properties of basalt fiber reactive powder concrete

Basalt fiber reactive powder concrete (BFRPC) was prepared by incorporating basalt fibers (BFs) instead of steel fiber into reactive powder concrete (RPC). In this study, we experimentally and numerically analyzed the impact resistance of BFRPC at different strain rates (10¹∼10¹ s¹). The Φ75mm Split Hopkinson pressure bar (SHPB) was used for impact compression tests and the finite element software LS-DYNA was used for numerical simulation analysis. The results showed that the high strength BFRPC has an obvious strain rate effect and the dynamic growth factor (DIF) of compressive strength increases logarithmically with strain rate. Meanwhile, the parameters of the CEB model were refitted and the relationship between strain rate and DIF was established. By using the Johnson_Holmquist_Concrete material constitutive model (HJC model), the stress-strain curves and failure patterns obtained were consistent with the experimental results. The incorporation of BFs significantly improve the deformation properties of BFRPC.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.