建筑结构学报2018，Vol.39Issue(5)：52-62,11.DOI:10.14006/j.jzjgxb.2018.05.007
受约束预应力混凝土空心板整浇楼面耐火极限试验研究
Experimental research on fire endurance of PC hollow-core slab integrated floor with constraints
摘要
Abstract
To investigate the fire endurance of PC hollow-core slab integrated floor with constraints,3 specimens at different load levels were experimentally studied. It shows that the control specimen and exposed specimens all collapse with flexural failure mode. The fire endurances of specimens are 132 and 73 minutes respectively when the load levels are 0.3 and 0.5. It is found that the fire endurance of specimen exposed to fire is decreased apparently when the load level is increased. There is a significant delay of the increase of internal temperature. The cross section forms a nonuniform temperature field and shows a layered distribution. The temperature in the holes is significantly higher than that of the concrete at the same height. The cross section temperature field and fire endurance of specimens at different load levels were simulated by ABAQUS. The proposed finite element model can be used for prediction of temperature field and fire endurance with good accuracy.关键词
预应力混凝土空心板/约束/整浇楼面/受火试验/有限元分析/温度场/耐火极限Key words
PC hollow-core slab/constraints/integrated floor/fire test/FEA/temperature field/fire endurance分类
建筑与水利引用本文复制引用
韩重庆,许清风,李梦南,陈玲珠..受约束预应力混凝土空心板整浇楼面耐火极限试验研究[J].建筑结构学报,2018,39(5):52-62,11.基金项目
国家十三五重大科技专项(2016YFC0701306),上海市优秀技术带头人项目(15XD1522600). （2016YFC0701306）
