集中荷载作用下四边支承矩形板承载力与弯剪破坏界限分析

Load Bearing Capacity of Rectangle Slab with Four Boundaries Supporting and Its Analyses of the Flexure-Shear Failure Under the Concentrated Load Action

作了低配筋简支方板在中置荷截作用下的破坏试验与分析。用塑性理论对任意点作用一集中荷载的四边支承矩形板的弯曲极限荷载计算方法作了分析。合理地选取了剪切极限荷载计算方法。对弯剪界限破坏值作了定量分析。同时,提出了关于无腹筋四边支承矩形板承载力计算与设计的建议。

The failure tests and analyses of the simple supported square slab subjected to loods at their centers,which have low steel ratio,were presented.The author analysised the method for calculating flexural ultimate concentrated load carried by anywhere on the rectangle slab having four boundaries supported using plastic theories and selected the calculating method for ultimate shear load reasonable.Analysised the values of the flexure-shear boundary failure quantitatively,the author put forward the suggestion for calculating the ultimate load and designing for rectangle slab having four boundary supparting and having no web reinforcement.