摘要
建立了考虑板、梁、柱协同工作的楼盖结构三维有限元分析模型;对具有不同梁板刚度比、板区格跨度比的31个现浇混凝土楼盖结构模型进行了弹性有限元分析,同时用弹性薄板理论计算了这些楼盖结构模型中板的内力和挠度;将两种方法的计算结果进行比较,研究了梁、板刚度比变化对板内力和变形的影响。研究结果表明,梁板刚度比变化对板内力和变形有较大的影响;综合比较弯矩和挠度计算结果,提出将αl2/l1≥5作为弹性内力计算时边支承双向板与柱支承双向板的界定条件。
Three-dimensional finite element analysis model was established to study the interaction of beams,slabs and columns.Thirty-one models were studied by the finite element method and the elastic thin plate theory（look-up table method）,which have different span ratios and flexural stiffness ratios of beams to slabs.The results show that changes in flexural stiffness ratio of beams to slabs have a greater influence on the internal forces and deformation of the slab.By comparisons of bending moments and deflection results,αl2/l1≥5 was advised to be the distinguishing criteria of the two-way edge-supported slabs and column-supported slabs.
出处
《建筑结构》
CSCD
北大核心
2013年第2期63-67,共5页
Building Structure
关键词
现浇混凝土楼盖
有限元法
弹性薄板理论
表格法
界定条件
cast-in-place concrete floor
finite element method
elastic thin plate theory
look-up table method
distinguishing criteria
