边支承双向板与柱支承双向板的界定条件

• 作 者: 刘宏斌 张株瑞 梁兴文
• 机 构: 西安建筑科技大学,河南徐辉建筑工程设计有限公司,
• 出 处: 建筑结构
• 发表日期: 2013年02期
• 关键词: 双向板 混凝土楼盖 挠度计算 刚度比 弹性薄板理论 界定条件 楼盖结构 内力计算 表格法 有限元法

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。

The three-dimensional finite element analysis model of floor structure considering the cooperation of slab, beam and column was established. The elastic finite element analysis of 31 cast-in-situ concrete floor structure models with different beam stiffness ratios and slab- At the same time, the internal forces and deflections of the slabs are calculated by the elastic thin plate theory. The results of the two methods are compared and the effects of the beam-plate stiffness ratio changes on the internal forces and deformations of the slab are studied. The results show that the change of stiffness ratio of slab has a great influence on the internal force and deformation of slab. Comparing the results of bending moment and deflection calculation, it is proposed to calculate αl2 / l1≥5 as elastic internal force. The definition of conditions.