现浇钢筋混凝土加劲肋空心管无梁楼盖是一种新型的钢筋混凝土空心楼盖体系 ,针对这种楼盖进行 了平行管向和垂直管向的简支板带试验 ,以分析加劲肋空心管楼盖在这两个方向上的承载力、刚度等受力性 能. 通过试验测试了加劲肋空心管楼盖在简支支承情况下的内力分布状况 ,研究了构件的裂缝、变形、承载力 和破坏形态. 试验研究表明 ,加劲肋空心管楼盖在两个垂直方向上的承载力及刚度差别并不大 ,且加劲肋空 心管的存在在一定程度上改善和提高了结构的受力性能. 关键词 : 无梁楼盖 ; 加劲肋空心管 ; 简支板带 ; 承载力试验 中图分类号 : U412. 221 文献标识码 : A Experimental study on simply supported slab of reinforced concrete stiffening ribbed hollow pipe girderless floor YAN G Wei2jun1 , YU Xiao2bing1 , ZHAN G Zhen2hao1 , Qiu Ze2you2 , L IU Cheng2wei1 , YIN Ji2hua1 (1. College of Bridge and Structure Engineering ,Changsha University of Science and Technology ,Changsha 410076 , China ; 2. Changsha Great Star New Building Materials Co. ,Ltd ,Changsha 410006 ,China) Abstract : Cast2in place reinforced concrete stiffening ribbed hollow pipe girderless floor is a new2 style reinforced concrete hollow floor system. Experimental study on two groups of simply suppor2 ted slabs has been done on this floor system in this paper. In one group of slabs ,the stiffening rib2 bed hollow pipes were parallelled with the span of the slab ,and the pipes were vertical with the span of the slab in another group of slabs. Through the experiment ,the mechanical properties on the two conditions of this floor are studied ,such as bearing capacity and rigidity. In the experi2 ment ,the structural behaviors of stiffening ribbed hollow pipe girderless floor ,including the distri2 bution of internal force ,crack ,deformation ,bearing capacity and failure mode have been investiga2 ted. All the results show that the difference of bearing capacity and rigidity on the two vertical con2 ditions of the floor is not apparent ,and the stiffening ribbed hollow pipes improve the structural be2 havior to a certain degree. Key words : girderless floor ;stiffening ribbed hollow pipe ;simply supported slab ;bearing ca2 pacity experimen

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