2017年6月下 施工技术 第46卷第12期 CONSTRUCTION TECHNOLOGY 23 D0I:10.7672/8js2017120023 砖混-预制空心楼板结构小面积火灾后加固设计研究* 裴卓非，许家文2，张弼伟2 (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) [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3kN/m2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. [关键词]火灾：预制空心楼板；混凝土：静载试验；有限元分析 [中图分类号]TU362 [文献标识码]A [文章编号]1002-8498(2017)12-0023-04 Design Research of Brick and Precast Hollow Slab Structure Reinforcement After Small Area Fire PEI Zhuofei' XU Jiawen2 ZHANG Biwei (1.Taiyuan Supervision Station of Construction Project Quality Taiyuan Shanxi 030027 China; 2.Shanxi Academy of Building Research Taiyuan Shanxi 030001 China) Abstract: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 paring 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/m2 the crack width at the middle span of floor is 0.08mm.When unloading to 0 cracks are still there but the crack width is 0.01mm.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. Key words:fire;precast hollow slab;concrete;static load test;finite element analysis 0引...
砖混-预制空心楼板结构小面积火灾后加固设计研究.pdf
