砖混-预制空心楼板结构小面积火灾后加固设计研究  

Design Research of Brick and Precast Hollow Slab Structure Reinforcement After Small Area Fire

作　　者：裴卓非 许家文[2] 张弼伟[2] 

机构地区：[1]山西八建集团有限公司,山西太原030027 [2]山西省建筑科学研究院,山西太原030001

出　　处：《施工技术》2017年第12期23-26,52,共5页Construction Technology

基　　金：国家自然科学基金项目(51308371);山西省自然科学基金项目(2014011033-1)

摘　　要：通过对火灾后砖混结构预制空心楼板进行加固设计研究,并对后加楼板进行静载试验和ANSYS有限元模拟分析,对比楼板挠度变形与应变的试验值和模拟计算值,得到后加楼板承载力富余度较高,楼板使用时偏安全;加载至最大荷载3k N/m^2时楼板跨中位置裂缝宽度为0.08mm,卸载至0时裂缝依然存在,但裂缝宽度为0.01mm,此裂缝对楼板承载力等均无影响。因此,火灾后对烧伤部位预制空心楼板进行替换可行。By reinforcement design research on brick and precast hollow slab after fire and static load test and ANSYS finite element simulation analysis for the new floor,comparing the test value and calculation ones of slab deflection deformation and strain,the rich coefficient of load capacity of the new slab is higher and the floor is safe in using stage.When loading to the maximum load of 3kN/m^2 the crack width at the middle span of floor is 0.08 mm.When unloading to 0 cracks are still there,but the crack width is 0.01 mm.The cracks can not influence the bearing capacity of the floor,etc.So after fire to replace the burned area with hollow floor slab is feasible.

关 键 词：火灾 预制空心楼板 混凝土 静载试验 有限元分析 

分 类 号：TU362[建筑科学—结构工程]