摘要
通过对竖向均布荷载作用下的现浇钢筋混凝土空心无梁楼盖进行弹塑性计算,得到了它的开裂荷载和极限承载力,分析了它的变形特征和挠度分布规律,描述了裂缝的形成、发展和破坏模式.同时给出了空心板中点的荷载-挠度曲线图,并分析了不同荷载阶段的挠度变化特点.通过改变管端净距、暗扁梁宽度及管径大小,得出管端净距宜为管长的1/6且不应小于80mm,管间净距不应小于50mm,暗扁梁宽度宜为空心板跨度的1/13～1/16,并提出一些设计建议.
Based on the elastic and plastic analysis,the crack load and ultimate load of cast-in-place RC hollow flat slab subjected to vertical uniformly distributed load are given.The deformation character and deflection distribution of the slab are analyzed.The deformation,development and destroy modes of cracks are also described.The load-deflection curve of the hollow flat slab's midpoint is received,and the deflection changing law of the slab is presented.Changing the distance of tube end,the width of hidden girder and the diameter of tube,it can be found that the distance of tube end should be 1/6 of the tube length and not less than 80mm,the clearance width should not be less than 50mm,and the width of hidden girder should be between 1/13～1/16 of the width of span.Some suggestions are advanced.
出处
《工业建筑》
CSCD
北大核心
2007年第z1期370-373,共4页
Industrial Construction
