无粘结预应力混凝土开洞板设置暗梁和加强筋的受力性能分析  

Analysis of mechanical behavior of unbonded prestressed concrete slabs with openings reinforced by internal beam or reinforcement bars

作　　者：曹霞[1] 蓝丽江[2] 金凌志[1] 

机构地区：[1]广西建筑工程检测与试验重点实验室桂林理工大学,广西桂林541004 [2]桂林理工大学博文管理学院,广西桂林541006

出　　处：《四川建筑科学研究》2013年第2期70-74,共5页Sichuan Building Science

基　　金：广西建筑工程检测与试验重点实验室资助课题(11-cx-04)

摘　　要：通过对8块无粘结预应力混凝土开洞板在竖向均布荷载作用下的实验,对比分析两种洞口加强方式下裂缝、钢筋应力、板的挠度的发展规律及极限承载力。同时,运用板条带法计算了考虑加强条件作用下的极限承载力,将计算结果与实验结果及屈服线理论的计算结果进行比较分析,结果表明暗梁的加强效果好于加强钢筋,为工程应用提供理论参考。Experiments of 8 Pcs unbonded prestressed concrete slabs with openings under vertical uniform load were conducted to made comparison and analysis of slab＇s crack,rebar stress,deflection development and ultimate bearing capacity of the two reinforcement modes for the opening in slab.At the same time,adopt strip coating method and yield line theory to calculate ultimate bearing capacity of slabs with reinforced opening;compare the above theoretical calculation results and laboratory experimental results.It is found that internal beam can reinforce slab with openings better than additional reinforcement bars which provide a theoretical reference for engineering application.

关 键 词：无粘结预应力混凝土 开洞板 暗梁 加强钢筋 受力性能 

分 类 号：TU378[建筑科学—结构工程]