Dynamic response characteristics of coral reef sand concrete under impact loading
文献类型：期刊论文
| 作者 | Qin, Qinglong1,2; Meng, Qingshan1; Mei, Qinghai3; Wu, Kai1,2; Wang, Chi1,2; Zhang, Jiwang4 |
| 刊名 | JOURNAL OF BUILDING ENGINEERING
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 66页码:18 |
| 关键词 | Coral reef sand concrete Split-hopkinson pressure bar (SHPB) Dynamic mechanical performance Polypropylene fiber Basalt fiber |
| DOI | 10.1016/j.jobe.2023.105847 |
| 英文摘要 | The dynamic mechanical properties, energy evolution characteristics, breakage modes, and damage mechanism of coral reef sand concrete (CRSC) are distinctly different from those of landsourced aggregate concrete. Because structures made of CRSC may suffer damage due to earthquakes and artillery shells, it is significant to investigate the impact resistance and dynamic response characteristics of CRSC. In this study, macroscopic and microscopic testing techniques were used to compare the dynamic response characteristics of CRSC, CRSC with polypropylene fibers (PFs), and CRSC with basalt fibers (BFs) under impact loading. The results showed that with increasing strain rate, the dynamic compressive strength and dynamic increase factor (DIF) of the CRSC increased via power and logarithmic functions, respectively. Furthermore, the PFs and BFs improved the dynamic compressive strength at medium and low strain rates. The damage modes of the CRSC and CRSC with BFs were primarily fragmentation damage, while the damage mode of the CRSC with PFs was core retention damage. The failure cracks of all three types of concrete developed through the coral coarse aggregate, cement mortar, and slurry near the interfacial bonds. Nanoindentation test results revealed the great bonding performances at the coral aggregate-slurry bond. The incorporation of PFs or BFs changed the form and content of the C-S-H in the interfacial transition zone of the CRSC, which in turn affected the mechanical properties of the CRSC. In practical engineering, however, PFs and BFs could still improve the seismic and blast-resistant performances of CRSC. |
| 资助项目 | National Natural Science Foundation of China[41877267] ; National Natural Science Foundation of China[41877260] ; Special Foundation for National Science and Technology Basic Research Program of China[2018FY10010003] ; Priority Research Program of the Chinese Academy of Science[XDA13010201] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME021026] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001043305800001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39165]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Meng, Qingshan |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Poly Wuhan Real Estate Dev Co, Wuhan 430000, Peoples R China 4.Guilin Univ Technol, Coll Civil Engn & Architecture, Guilin 541004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Qinglong,Meng, Qingshan,Mei, Qinghai,et al. Dynamic response characteristics of coral reef sand concrete under impact loading[J]. JOURNAL OF BUILDING ENGINEERING,2023,66:18. |
| APA | Qin, Qinglong,Meng, Qingshan,Mei, Qinghai,Wu, Kai,Wang, Chi,&Zhang, Jiwang.(2023).Dynamic response characteristics of coral reef sand concrete under impact loading.JOURNAL OF BUILDING ENGINEERING,66,18. |
| MLA | Qin, Qinglong,et al."Dynamic response characteristics of coral reef sand concrete under impact loading".JOURNAL OF BUILDING ENGINEERING 66(2023):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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