摘要
为了研究钢纤维掺量对超高性能混凝土(UHPC)轴心受拉力学性能的影响,设计、制作了纤维掺量为0%~5%的6组8字型单轴受拉试件,标准养护28d后进行单轴拉伸试验,得到了不同纤维掺量UHPC单轴受拉应力-应变全曲线;分析了钢纤维掺量对UHPC抗拉强度、峰值应变以及受拉韧性的影响.试验结果表明:在不影响UHPC工作性能的前提下,纤维掺量可达到5%,其抗拉强度为8.50MPa,对应的应变为1 619με;随着钢纤维掺量的增加,UHPC的抗拉强度、峰值应变、抗压强度以及受拉韧性均逐渐提高.最后依据试验数据建立了UHPC单轴受拉本构方程.试验结果可为UHPC材料的工程应用提供参考.
In order to investigate the effect of fiber volume content on tensile characteristic of Ultra-High Performance Concrete(UHPC),6 groups of“8”shape specimen were designed,and uniaxial tensile test was performed after 28 days standard curing,the complete tensile stress-strain curves were gotten,the effect of fiber volume content on tensile strength,peak strain and toughness of UHPC were analyzed.Test results show that the fiber volume content can be as much as 5%without workability problem,its tensile strength and peak strain are 8.50 MPa and 1 619μεrespectively;with the fiber volume content increase the tensile strength,peak strain,compressive strength and toughness increase as well,the uniaxial tensile constitute of UHPC was finally proposed based on the test results.The results of this paper provide a reference for the application of UHPC material.
作者
胡翱翔
梁兴文
于婧
史庆轩
李林
HU Aoxiang;LIANG Xingwen;YU Jing;SHI Qingxuan;LI Lin(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Shaanxi Jianyan Structural Engineering Co Ltd,Xi’an 710082,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第9期30-37,共8页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51278402)
陕西省教育厅专项科研计划资助项目(16JK1449)~~
关键词
单轴拉伸试验
超高性能混凝土
纤维掺量
抗拉强度
本构方程
uniaxial tensile test
ultra-high performance concrete(UHPC)
fiber volume content
tensile strength
uniaxial tensile constitute
作者简介
胡翱翔(1990-),男,湖北襄阳人,西安建筑科技大学博士研究生;通讯联系人,梁兴文,E-mail:liangxingwen2000@163.com。
