高温后HRB高强钢筋粘结锚固性能的试验研究  

EXPERIMENTAL STUDY ON BOND-ANCHORAGE PROPERTIES OF HRB HIGH-STRENGTH STEEL BARS IN CONCRETE AFTER HIGH TEMPERATURE

作　　者：牛向阳[1] 王全凤[1] 徐玉野[1] 杨勇新[2] 罗漪[1] 胡玲[1] 

机构地区：[1]华侨大学土木工程学院,福建泉州362021 [2]中冶建筑研究总院有限公司,北京100088

出　　处：《工业建筑》2010年第9期84-87,共4页Industrial Construction

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：对高温后45个HRB高强钢筋与混凝土粘结锚固试件进行拔出试验,研究高温后高强钢筋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。试验考虑混凝土强度、锚筋屈服强度、配箍率的影响,分析各种参数对高温后高强钢筋粘结性能的影响规律,并指出高温后高强钢筋的粘结锚固机理和普通钢筋的粘结锚固机理大致相同。Based on 45 HRB high-strength steel bar specimens pull-out tests after high temperature,it is studied that the bond-anchorage properties of high-strength steel bars and the main factors influencing the bond capacity between high-strength steel bars and concrete.During the experiments,the reinforced concrete specimens were heated at 200,400 and 600 ℃,respectively,cooled in air and subjected to monotonic pull-out loading.The influencing regulations of some factors on the bond-anchorage properties of high-strength steel bars are investigated,such as concrete strength,yield strength of reinforcing bar,stirrup ratio.At the same time,the paper clarifies that the major bond-anchorage mechanism of high-strength steel bars after high temperature is similar to that of the general reinforcement.

关 键 词：高温 HRB高强钢筋 粘结锚固 粘结强度 

分 类 号：TU375[建筑科学—结构工程]