高温后普通混凝土与细晶粒钢筋粘结性能试验研究  

Experimental study on bond-anchorage properties of fine grain steel bars in common concrete after high temperature

作　　者：牛向阳[1] 王全凤[1] 杨勇新[1] 徐玉野[1] 罗漪[1] 

机构地区：[1]华侨大学土木工程学院,泉州362021

出　　处：《建筑结构》2012年第3期116-118,32,共4页Building Structure

基　　金：国家863计划资助项目(2007AA03Z550);福建省青年科技人才创新项目(2007F3064)

摘　　要：通过对48个普通混凝土与细晶粒钢筋粘结锚固试件的拔出试验,系统地研究了高温后粘结锚固的特点和影响粘结锚固强度的主要因素。钢筋混凝土试件的受热温度分别为20,200,400,600℃,冷却方式为空气中自然冷却,加载方式为单向拉拔。试验考虑了锚固长度、配箍率以及温度的影响,分析了各种参数对高温后钢筋与混凝土粘结性能的影响规律,研究了高温对混凝土抗拉强度和粘结锚固强度的影响,并讨论了高温后混凝土抗拉强度和粘结锚固强度的关系。Based on the pull-out tests of 48 fine grain steel bar specimens in common concrete after high temperature,the bond-anchorage properties and the main factors influencing the bond capacity between concrete and fine grain steel bars is studied systematically.During the experiments,the reinforced concrete specimens were heated at 20℃,200℃,400℃ and 600℃ respectively,then cooled in air naturally and subjected to monotonic pull-out loading.The influencing regulations of some factors on the bond-anchorage properties of steel bars in concrete were investigated,such as anchorage length,stirrup ratio and temperature.At the same time,the influence of high temperature on the tensile strength and bond strength was tested,and the relationship between them was discussed.

关 键 词：高温 细晶粒钢筋 粘结锚固 拔出试验 

分 类 号：TU375[建筑科学—结构工程]