Calculation and design research on two-way ribbed slab floor
In the design of two-way ribbed slab floor,the elastic plate is used to calculate and analyze the floor.However,compared with the actual ribbed slab floor structure,the calculation assumption of the calculation model of the commonly used software in the column cap area has the problem of repeatedly considering the overlapping area between the thick plate of the column cap and the frame beam,the overlapping area between the plate-column connection area and the beam-column connection area.Aiming at this problem,a variety of calculation models with different calculation assumptions were established for the column cap area of ribbed slab floor,and the influence of each model on the internal force of the slab floor members was analyzed.The results show that considering the differences in these calculation assumptions,the internal force calculation results of the members connected to the column cap area will change greatly.In the design,the influence of these differences should be fully concerned to avoid structural safety problems.In addition,the analysis method of latticed column caps into equivalent beams is adopted for ribbed slab floor,which can avoid overestimating the bearing capacity of column caps.The calculation results are reasonable and can facilitate the reinforcement design of column caps.