HRBF500级钢筋混凝土简支梁抗火性能试验  

Experimental research on fire-resistant performance of HRBF500 reinforced concrete simple beams

作　　者：王全凤[1] 霍喆赟[1] 徐玉野[1] 王凌云[2] 

机构地区：[1]华侨大学土木工程学院,泉州362021 [2]上海应用技术学院土木建筑与安全工程学院,上海201418

出　　处：《建筑结构》2013年第1期76-80,共5页Building Structure

基　　金：国家高技术研究发展计划(863)项目(2007AA03Z550);福建省青年科技人才创新项目(2007F3064)

摘　　要：通过5根配置HRBF500级钢筋的混凝土简支梁的三面受火试验,探讨了混凝土保护层厚度、荷载比、试件配筋率等因素对HRBF500级钢筋混凝土简支梁耐火性能的影响。试验结果表明:各试件截面温度场分布接近;混凝土保护层厚度和荷载比对试件耐火极限时间影响较大,试件配筋率对耐火极限影响不明显。混凝土保护层越厚、配筋率越大,耐火极限时间越长;荷载比越大,耐火极限时间越短。Three-side fire tests of five HRBF500 reinforced concrete simple beams were carried out to reveal the influences of such factors as thickness of concrete cover,load ratio and reinforcement ratio on the fire resistance of HRBF500 reinforced concrete simple beams.Test results show that the temperature field of each beam is similar;factors as thickness of concrete cover and load ratio have significant effect on fire resistance of HRBF500 reinforced concrete simple beams.The reinforcement ratio affects on the fire resistance of beams non-significant.It can be found that the fire endurance of HRBF500 reinforced concrete simple beams increases with the increasing of the thickness of concrete cover and reinforcement ratio,and decreases with the increasing of the load ratio.

关 键 词：HRBF500 简支梁 耐火极限 

分 类 号：TU375.1[建筑科学—结构工程] TU317.1