高温后钢筋与玄武岩纤维混凝土黏结性能  

The Bonding Property of Steel Bar and Basalt Fiber Concrete after High Temperature

作　　者：赵燕茹[1] 刘明 王磊[1] 石国星 ZHAO Yan-ru;LIU Ming;WANG Lei;SHI Guo-xing(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Training Center,Inner Mongolia Electric Power(Group)Co.,Ltd.,Hohhot 010010,China)

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010051 [2]内蒙古电力(集团)有限责任公司培训中心,呼和浩特010010

出　　处：《科学技术与工程》2021年第9期3776-3782,共7页Science Technology and Engineering

基　　金：国家自然科学基金(11762015,11362013)。

摘　　要：对经历不同温度和玄武岩纤维掺量的混凝土试件进行中心拉拔试验,基于黏结-滑移整体曲线分析温度和纤维掺量对光圆钢筋与混凝土黏结性能的影响。结果表明:400℃以下时,温度对钢筋与混凝土间黏结应力造成的损失较小,黏结-滑移曲线的4个阶段变化明显,而升温至600℃和800℃时造成黏结应力严重损失,曲线没有明显的阶段变化。在200℃时黏结性能较好,在800℃时黏结性能较差。纤维掺量对黏结性能也有较大影响,适量纤维的掺入有利于提高混凝土的整体性能,改善高温后钢筋混凝土的黏结性能,而过量掺入则会降低高温后混凝土黏结性能。In order to study the bond performance of concrete under different temperatures and basalt fiber content,a central pull-out test was conducted,and the influence of temperature and fiber content on the bond performance of plain bar and concrete were analyzed based on the bond-slip overall curve.The results show that when the temperature does not exceed 400℃,the loss of bond stress between steel bar and concrete is small,and the bond-slip curves can be obviously divided into four stages.When the temperature rises to 600℃and 800℃,the bond stress decreases significantly and the bond-slip curves are relatively flat.The bonding performance is better at 200℃and worse at 800℃.Adding basalt fiber has a great impact on the bond performance.The appropriate addition of fiber can improve the overall performance of concrete and the bonding performance of reinforced concrete after high temperature.However,the excessive addition of fiber will reduce the bond performance of concrete after high temperature.

关 键 词：高温 玄武岩纤维 光圆钢筋 黏结性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]