宽扁梁楼盖结构计算方法

借鉴ACI规范中板带分析方法，利用有限元法对竖向荷载作用下的宽扁粱楼盖进行了探讨，获得了梁在柱上板带中弯矩比例和柱上板带弯矩分配系数随梁宽、梁高、板厚、区格跨度及柱截面大小的变化规律，通过分析弯矩分配系数随梁相对抗弯刚度因子的变化特征，发现柱上板带弯矩的分配不能像ACI规范中只考虑梁的相对抗弯刚度因子及两向跨度比两个参数，梁宽对于宽扁梁结构也是一个很重要的变量，基于以上分析，提出了宽扁梁楼盖内力计算方法。

Calculation Method for Wide-flat Beam-slab Structures

With reference to the slab strip model in the ACI building code and by using the finite element method, the behavior of a wide-flat beam-slab structure under vertically load was investigated. The variation of the distribution coefficients of the column-strip bending moments with beam width, beam height, slab thickness, grid span and column section size, as well as the bending moment ratices of the beam were presented. By the variation analysis of the distribution coefficients vs. the relative stiffness coefficient, it is found that the moment distribution in column strips could not be discussed only according to the relative stiffness coefficient and the grid span ratio in two directions, just like that in ACI building code, that beam width is also a very important variable for the wide-flat beam-slab structure. on the basis of the above analysis results, a calculation approach of inner force for wide-flat beam-slab structure was proposed.