Research On Seismic Performance Of RC Frames Structure With Cast-in-place Floor

Frame with cast-in-place floor is a common structural system in many projects. At present, research demonstrates that cast-in-place floor has a great impact on bearing capacity, stiffness and deformation properties of frame, especially strengthening effect cast-in-place applying on beam, it can often lead to strong beam-weak column in earthquake. If we neglect the effect of cast-in-place slab applying on frame, frame can not retain total damage mechanism of strong column-weak beam. Finally, it can bring serious life menace and estate losses. So during seismic design of frame, we should fully consider influence of cast-in-place applying on frame. Many scholars at home and abroad make many researches on frame with cast-in-place floor, but many problems need to solve. The main contents of this paper are as follows:1.With the purpose of fully considering the influence of cast-in-place applying on frame, this paper summarizes and analyzes the models of references in order to obtain how to consider the influence on deformation properties of cast-in-place applying on frame. Furthermore, it summarizes the research achievement about affecting on cast-in-place applying on frame for the following research.2.The paper establishes three dimensional frame model by finite element ABAQUS. It studies the dynamic response feature during inputting different seismic waves when the frame's slab thickness and slab rebar make change. We review the deformation capacity by way of variety of inter-story drift and inter-story displacement rotation.3.When one of two situations happens, different reinforcement ratio but the same slab thickness and different slab thickness but the same reinforcement ratio; changing model explains the cast-in-place's seismic influence on frame in combination with inter-storey drift and slab damage.4.The paper determines effective width of slab's initial value by comparison of RBFOR envelope under different slab thickness and by comparison of RBFOR envelope under the different rebar diameters for cast-in-place floor.The paper obtains some beneficial conclusion and puts forward some design suggestion on the basis of model calculation. It has certain reference value for analysis and design aiming at frame with cast-in-place floor and provides some suggestion for Code for seismic design of buildings.