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

作　　者：张炳锋 高士武 杨晓林[1,2,3] 刘柯楠 ZHANG Bingfeng;GAO Shiwu;YANG Xiaolin;LIU Kenan(School of Civil Engineering and Water Resources,Qinghai University,Xining 810016,China;Qinghai Provincial Key Laboratory of Energy-saving Building Materials and Engineering Safety,Xining 810016,China;Key Laboratory of Compressed Air Energy Storage in Qinghai Province,Xining 810016,China)

机构地区：[1]青海大学土木水利学院,青海西宁810016 [2]青海省建筑节能材料与工程安全重点实验室,青海西宁810016 [3]青海省压缩空气储能重点实验室,青海西宁810016

出　　处：《青海大学学报》2024年第3期64-70,共7页Journal of Qinghai University

基　　金：青海省科学技术厅项目(2022-ZJ-916)。

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∅75 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。In order to investigate the effects of different content of PVA fiber on the dynamic compressive property of concrete under impact loads,∅75 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 appropriate fiber content in practical engineering.

关 键 词：HOPKINSON压杆 PVA纤维 纤维混凝土 冲击荷载 

分 类 号：TU528[建筑科学—建筑技术科学]