The Cast-in-place Reinforced Concrete Concealed-flat-beam Hollow Floor Mechanics Characteristic Analysis And Engineering Application

The cast-in-place reinforced concrete concealed-flat-beam hollow floor is a new type ofplate floor system, it is light weight, large span, followed with a post cap floor without beam,plate girder slab, ribbed floor without beam, conform to the trend of plate floor systemrequirements of the new plate floor system, now in many civil defense project put into use,and achieved good economic and social benefits. But as a new floor system, the civil airdefense project performance and economy also knew enough, therefore, for the floor forms ofeconomic benefits generated doubt, hinder its superiority.The cast-in-place reinforced concrete concealed-flat-beam hollow floor in civil airdefense engineering application is still in the stage of exploration, design often is used tobeam method or the equivalent frame method, but because the stiffness is calculated with theweakest section calculation, and the actual stress are different.In subsequent work by using the equivalent principle of cast-in-site concrete hollow slabweight (in accordance with section area), and stiffness of the principle of equivalent intodifferent thickness solid concrete slab, the finite element program MIDAS to static analysis,and carries on the summary of the dynamics analysis, the hollow floor and solid slabs understatic and dynamic characteristics on some differences. The article points out that in the airdefense construction in hollow floor should pay attention to some problems and examples ofengineering hollow floor and beam slab floor of economic comparison, display hollow floorin technical and economic advantages.