聚乙烯醇纤维掺量对混凝土动态力学性能的影响
Effects of PVA fiber content on the dynamic mechanical properties of concrete
张炳锋 1高士武 1杨晓林 2刘柯楠1
作者信息
- 1. 青海大学土木水利学院,青海 西宁 810016
- 2. 青海大学土木水利学院,青海 西宁 810016;青海省建筑节能材料与工程安全重点实验室,青海 西宁 810016;青海省压缩空气储能重点实验室,青海 西宁 810016
- 折叠
摘要
为探究冲击荷载下不同体积掺量的聚乙烯醇纤维对混凝土动态压缩性能的影响,采用ϕ75 mm分离式Hopkinson压杆进行了基于不同体积参数的PVARC试件冲击压缩试验.结果表明:随着纤维掺量的提高,PVARC 试件的破坏程度逐步减小,应变率在 185 s-1 附近时,0.75%的试件动态峰值应力比普通混凝土提高了 50%.该研究结果可为在实际工程中选择合适的纤维掺量提供参考.
Abstract
In order to investigate the effects of different content of PVA fiber on the dynamic com-pressive property of concrete under impact loads,ϕ75 mm split Hopkinson compression bar is adop-ted to conduct impact compression tests on PVARC specimens based on different volume parameters.When the strain rate is around 185 s-1,the dynamic peak stress of 0.75%of the specimen is 50%higher than that of ordinary concrete.The research results can provide reference for selecting appro-priate fiber content in practical engineering.
关键词
Hopkinson压杆/PVA纤维/纤维混凝土/冲击荷载Key words
Hopkinson strut/PVA fiber/fiber reinforced concrete/impact load引用本文复制引用
基金项目
青海省科技厅项目(2022-ZJ-916)
出版年
2024