混凝土空心楼盖柔性与刚性支承界限的分析研究

摘要

借助ANSYS有限元分析软件，考虑板、梁协同工作，在4种板跨比的情况下通过改变梁高建立了52个中间板格的混凝土空心楼盖结构三维有限元分析模型。分别对模型进行弹性有限元分析和用拟板法计算板的内力，将这两种方法得到的结果进行比较得出结论：梁的相对抗弯刚度因子对板的内力影响很大，于是提出将αl2 l17作为中间板格柔性支承和刚性支承板弹性计算的界限。%In view of the interaction of beams and floors,this paper establishes a three-dimensional finite element analysis model of fifty-two concrete hollow floor structures by changing the beam height in four different floor span ratios using finite element analysis software ANSYS. The elasticity of the model is analyzed by finite element method and the internal force of the floor is calculated by the analogue floor method. A Conclusion is drawn by comparing the results got by the two methods that the factor of the relative bending stiffness of the beam greatly influences the internal force of the floor. Therefore,l2 l17 is advised to be the calculating boundary between the flexible supporting of the middle floors and the elasticity calculation of the rigid supporting floors.