硅酸盐通报2025，Vol.44Issue(1)：59-68,100,11.DOI:10.16552/j.cnki.issn1001-1625.2024.0794
动态荷载下聚乙烯醇纤维混凝土阻裂性能试验研究
Experimental Study on Cracking Resistance of Polyvinyl Alcohol Fiber Concrete under Dynamic Loading
韩子默 1杨国梁 2李峰 2张志飞 2毕京九 3赵康朴 2刘依4
作者信息
- 1. 中国矿业大学(北京)力学与土木工程学院,北京 100083||长江三峡技术经济发展有限公司武汉分公司,宜昌 443099
- 2. 中国矿业大学(北京)力学与土木工程学院,北京 100083
- 3. 北方爆破科技有限公司,北京 100089
- 4. 中国矿业大学(北京)力学与土木工程学院,北京 100083||国能水务环保有限公司,北京 100089
- 折叠
摘要
Abstract
In order to investigate the effect of fiber volume content on the cracking resistance of polyvinyl alcohol fiber engineered cementitious composite(PVA-ECC)under dynamic loading,impact tests were carried out on the notched semi-circular bending(NSCB)specimen with five fiber volume content(0％,0.75％,1.50％,2.25％,3.00％)by separated Hopkinson pressure rod device(SHPB).Combined with the dynamic fracture process recorded by high speed camera,the dynamic cracking toughness and energy dissipation characteristics of material were analyzed,and the fractal dimension of cracking growth path was calculated according to the theory of box dimension.The results show that the dynamic cracking toughness of material increases first and then decreases with the increase of fiber volume content,and the dynamic cracking toughness is higher when the fiber volume content is in the range of 1.50％to 2.25％.The dissipative energy increases with the increase of fiber content in the range of 0.75％to 2.25％,but the total absorbed energy decreases with the increase of fiber content.Under constant velocity impact,the fractal dimension of final crack growth path after material failure is the highest when the fiber content is 2.25％,and the cracking resistance is best.When the fiber content is more than 2.25％,the fractal dimension of cracking growth path shows a downward trend,and the fiber cracking resistance gain effect decreases.关键词
PVA纤维/工程水泥基复合材料/起裂韧度/分形维数/能量耗散Key words
PVA fiber/engineered cementitious composite/cracking toughness/fractal dimension/energy dissipation分类
建筑与水利引用本文复制引用
韩子默,杨国梁,李峰,张志飞,毕京九,赵康朴,刘依..动态荷载下聚乙烯醇纤维混凝土阻裂性能试验研究[J].硅酸盐通报,2025,44(1):59-68,100,11.
