某无梁楼盖楼板加固前、后原位荷载试验研究  

Research on In-situ Load Tests of a Beamless Floor Slab Before and After Reinforcement

作　　者：袁哲峰 郭小飞 牛方义 石光 程岩雷 YUAN Zhe-feng;GUO Xiao-fei;NIU Fang-yi;SHI Guang;CHENG Yan-lei(China Academy of Building Research Co,Ltd,Beijing 100013,China;CABR Testing Center Co,Ltd,Beijing 100013,China;Beijing Construction Engineering Quality No.3 Testing&Inspection Institute,Beijing 100037,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]建研院检测中心有限公司,北京100013 [3]北京建设工程质量第三检测所有限责任公司,北京100037

出　　处：《建材世界》2023年第6期76-79,123,共5页The World of Building Materials

基　　金：中国建筑科学研究院有限公司青年基金项目(20230112331030034).

摘　　要：某无梁楼盖楼板拟增加楼面活荷载。经承载力验算,该楼板增加楼面荷载后,楼板承载力不满足规范要求,需对该楼板进行加固。为了解该楼板加固前及加固后的工作状态和受力性能,分别对该楼板进行了加固前、后荷载试验。结果表明:该楼板在加固前、后相应加载荷载下均未超过规范对正常使用极限状态下的挠度限值;且该楼板在加固前、后相应加载荷载下的荷载挠度曲线基本呈线性变化,且残余变形很小,说明楼板均处于弹性变形状态。A beamless floor slab plans to increase the live load on the floor.After bearing capacity calculation,it is found that,the bearing capacity of the floor slab does not meet the requirements of the specification after increasing the floor load.Therefore,the floor slab needs to be reinforced.In order to understand the working state and stress performance of the floor slab before and after reinforcement,load tests were conducted on the floor slab before and after reinforcement.The results are as follows:According to the standard,the floor slab has not exceeded the deflection limit for the serviceability limit state under the corresponding loads before and after reinforcement.The load deflection curve of the floor under the corresponding load is basically linear before and after reinforcement,and the residual deformation is very small,indicating that the floor is in an elastic deformation state.

关 键 词：无梁楼盖 加固 荷载试验 等效均布荷载 

分 类 号：TU317[建筑科学—结构工程]