河北工业大学学报JOURNALOFHEBEIUNIVERSITYOFTECHNOLOGY2023年2月February2023第52卷第1期Vol.52No.1BF-SHCC动态拉伸性能试验研究郭龙1，徐名凤1，周健1，田稳苓1，张学杰2，崔健2（1.河北工业大学土木与交通学院，天津300401；2.天津大学建筑工程学院，天津300072）摘要为探讨玄武岩纤维高延性水泥基复合材料（BasaltFiberStrain-HardeningCementitiousComposites,BF-SHCC）动态拉伸性能，自行研发设计了适用于BF-SHCC高速拉伸试验的试件尺寸和连接方式，并采用高速拉伸试验机进行高速拉伸试验；采用电子万能试验机对BF-SHCC进行了低速拉伸试验；研究分析了4种应变率下BF-SHCC动态拉伸性能。结果表明：BF-SHCC在4种应变率下，均表现出应变硬化现象，试件在低速拉伸试验条件下均表现出多缝开裂现象，在高速拉伸试验条件下，表现为单缝开裂破环；BF-SHCC的初裂强度和极限强度均随应变率的增加而增大，初裂强度的应变率敏感性高于极限强度的应变率敏感性；在低速拉伸试验条件下，BF-SHCC的极限延伸率和峰值韧性，随应变率的增加而降低，在高速拉伸试验条件下，BF-SHCC的极限延伸率和峰值韧性有明显提高。关键词高延性水泥基复合材料；玄武岩纤维；高速拉伸试验；应变率；动态拉伸性能中图分类号TU528.572文献标志码AStudyondynamictensilepropertiesofBF-SHCCGUOLong1,XUMingfeng1,ZHOUJian1,TIANWenling1,ZHANGXuejie2,CUIJian2（1.SchoolofCivilEngineeringandTransportation,HebeiUniversityofTechnology,Tianjin300401,China;2.SchoolofCivilEngineering,TianjinUniversity,Tianjin300072,China）AbstractInordertoinvestigatethedynamictensilepropertiesofBF-SHCC,thesizeandconnectionmethodofthetestpiecessuitableforthehigh-speedtensiletestofBF-SHCCwereindependentlydeveloped,andahigh-speedtensiletesterwasusedinthehigh-speedtensiletest.BF-SHCCwassubjectedtothelow-speedtensiletest;thedynamictensileproper⁃tiesofBF-SHCCunderfourstrainrateswereanalyzed.TheresultsshowthatBF-SHCCexhibitsstrainhardeningatfourstrainrates,andunderlow-speedtensiletestingconditions,thespecimenappearsmulti-slitcracking,andunderhigh-speedtensiletestconditions,itappearsasasingle-slitcracking;theinitialcrackstrengthandultimatestrengthofthematerialincreasewiththeincreaseofthestrainrate,andthestrainratesensitivityofthe...
