高温后纤维高强混凝土灌浆界面受剪性能试验研究  

Experimental study on shear behavior of fiber-reinforced high-strength grout-concrete interface after elevated temperature

作　　者：徐晨 毛小勇[1,2] 朱勇 蔡新江 Xu Chen;Mao Xiaoyong;Zhu Yong;Cai Xinjiang(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou Jiangsu 215011,China;Suzhou City University,Suzhou Jiangsu 215100,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]苏州城市学院,江苏苏州215100

出　　处：《消防科学与技术》2025年第2期236-241,共6页Fire Science and Technology

基　　金：国家自然科学基金(52278514);江苏省高等学校基础科学(自然科学)研究重大项目(21KJA560002)。

摘　　要：为研究高温后纤维高强混凝土灌浆界面受剪性能,对Z形双面剪切试件进行受剪推出试验,考虑温度(20、100、300、500、600℃)、界面粗糙度、灌浆料强度对受剪性能的影响。结果表明:随着温度升高,界面抗剪承载力呈下降趋势;增加界面粗糙度能有效提高界面的抗剪承载力,随着温度升高,界面粗糙度对抗剪承载力的影响无明显变化;增加灌浆料的强度等级,能够提升界面的抗剪承载力。To examine the shear behavior of the interface between concrete and fiber-reinforced high-strength grout after high-temperature exposures,Z-type double shear test specimens were designed and tested via thermal and push-out shear experiments.The test parameters include temperatures of 20,100,300,500,and 600 ℃,interface roughness and grout strength.The results show that the shear resistance of the interface decreases with the increase in temperature.By improving the interface roughness,the interfacial shear capacity was enhanced,and the efficiency of the enhancement remained relatively stable as the temperature increased.Moreover,the shear resistance of the interface was found to be positively correlated with the strength of the grout.

关 键 词：高温后 混凝土灌浆界面 抗剪承载力 界面粗糙度 

分 类 号：X913.4[环境科学与工程—安全科学] TU998.1[建筑科学—市政工程]