摘要
超高性能混凝土(Ultra High Performance Concrete,UHPC)是一种具有超高强度、良好韧性和优异耐久性的水泥基复合材料,在海上结构、地下空间、核废料容器和核反应堆防护罩等特殊工程和国防军事工程中具有广阔的应用前景。为适应其抗冲击和抗爆性能的需求,对UHPC开展动态力学性能研究显得尤为重要。通过对国内外UHPC抗冲击性能试验和数值模拟研究进展的系统梳理和总结,阐述了应用霍普金森杆开展冲击压缩试验和动态抗拉试验存在的问题及改进措施,分析了应变率、材料组分和冲击次数等因素对UHPC动态冲击性能的影响,探讨了确保UHPC冲击试验数值模拟有效性的关键问题。最后,对UHPC抗冲击性能今后的研究方向提出了一些建议,希望能为UHPC动态性能研究以及UHPC在实际工程中的应用提供指导和帮助。
Ultra high performance concrete（UHPC） is a cement-based composite with ultra-high strength,good toughness and excellent durability.These excellent properties of UHPC will make it have good application prospects in defense project and some especial projects such as offshore structures,underground space,nuclear waste containers and nuclear reactor shield,etc.To meet the needs of impact resistance and anti-blast in the structures,it is very important to study the dynamic properties of UHPC.Based on the systematic review and summary of the achievements on experimental studies and numerical simulation of impact resistance in UHPC at home and abroad,the existing problems and improvement measures of impact compression test and dynamic tensile test using Hopkinson bar were elaborated.The factors effecting impact property including strain rate,material composition and the number of impact were analyzed.The key problems ensuring the effectiveness of numerical simulation on impact test of UHPC were discussed.Finally,suggestions are proposed for the future research of UHPC impact resistance.It is of purpose to provide guidance to the research of dynamic performance in UHPC and the application of UHPC in practice.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第1期146-154,165,共10页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51478183)
江西省青年科学家培养对象计划(20142BCB23012)
江西省高等学校科技落地计划(KJLD13039)
关键词
超高性能混凝土
霍普金森杆
冲击压缩试验
动态抗拉试验
数值模拟
Ultra high performance concrete
Hopkinson bar
impact compression test
dynamic tensile test
numerical simulation
