摘要
为明确混凝土框架结构受地震破坏造成的几何损伤对其遭受地震次生火灾后耐火性能退化规律的影响,分析总结震害资料以及抗震实验记录,将混凝土保护层剥落、残余变形作为混凝土结构的震损形式,通过数据统计与回归分析的方法确定损伤尺寸,从而建立了两层两跨震损钢筋混凝土平面框架有限元模型,得到了框架结构变形特点和受火位置、轴压比、层间位移角对平面框架结构耐火极限的影响规律。
In order to clarify the influence of geometric damage of concrete frame structure caused by earthquake on the degradation law of fire resistance after earthquake,the seismic damage data and seismic test records are analyzed and summarized.The spalling and residual deformation of concrete protective layer are taken as the seismic damage form of concrete structure,and the damage size is determined by data statistics and regression analysis.Thus,the finite element model of two-story and two span earthquake damaged reinforced concrete plane frame is established,and the deformation characteristics of frame structure and the effects of fire position,axial compression ratio and story displacement angle on the fire resistance of plane frame structure are obtained.
作者
陈全杰
陈伟
刘虹
文波
CHEN Quan-jie;CHEN Wei;LIU Hong;WEN BO(State Grid Shaanxi Province Electric Power Company Economic and Technical Research Institute,Shaanxi Xi'an 710065,China;School of Civil Engineering,Xi'an University of Architecture and Technology,Shaanxi Xi'an 710055,China)
出处
《消防科学与技术》
CAS
北大核心
2021年第10期1455-1462,共8页
Fire Science and Technology
基金
国家自然科学基金项目(52078415)
中国地震局工程力学研究所基本科研业务费专项资助项目(2020EEEVL0415)
陕西省教育厅协同创新中心项目(20JY034)
国网陕西省电力公司经济技术研究院科研项目(5226JY19000H)。
关键词
地震次生火灾
震损钢筋混凝土框架
耐火极限
post earthquake fire
seismic damage of reinforced concrete frame
fire resistance time
