The Seismic Analysis Of Reinforced Concrete Frames Considering The Effect Of Infill Walls

Infilled frame is a common structure system used in the current building structures. And the current seismic design method adopts the method of pure framework in general; the dead weight of the wall is applied to calculating model as a load, in the seismic calculation, the effect of infill walls to frame structure stiffness and natural cycle is considered. According to the number of the infill walls, the natural cycle of frame system is reduction, but the synergy between the infill walls and frame is not reasonable to consider. A large number of existing data indicate that the infill walls have great effect on the capacity, stiffness and deformation behavior of frames. A large number of earthquake damage also suggests that the destruction generated by ignoring the effect of the infill walls. So it is necessary to take the effect of the infill walls on the frames into account when doing the seismic design. Although many technical craft workers at home and abroad have done a lot of research about the infill walls, but there are still a lot of problems to solve. Main research work in this thesis is summarized as follows.1、On the basis of theoretical analysis, this paper uses a framework text-filled with masonry shear walls model, the fill walls as seismic shear walls and framework are computing in parallel. With MIDAS/GEN analysis software, consider the number of the infill walls, different arrangement and so on, and build a reasonable model to study the influence of the infill walls in the frame.2、Based on the framework test-filled with masonry shear walls model, consider the stiffness of the infill walls (stiffness reduction) and build model under the condition of the infill walls number and different arrangement, and to standardize method of the infill walls being as load is compared. In the MIDAS/GEN,11kinds of model built are compared. Among them there are four kind model of different infill walls number: A (filling rate is100%), B (filling rate is75%), C (filling rate is50%), D (filling rate is25%), and the corresponding models used standardize method:A1,B1,C1,D1. Under the number of the infill walls, change the arrangement position and build the model F, G compared to the model C, and add an empty frame model E.3、Through the model analysis, compare to the corresponding models, and study the frame system natural cycle influence from the infill walls. Demonstrate respectively the layout, number and method used of the infill walls impact the natural cycle. And recognize that the walls impact the wrest resistant stiffness of the structure.4、Use the response spectrum analysis and time history analysis to study the infill walls impact the maximum horizontal displacement and displacement between floors and story shear force. And the time history analysis curve of the displacement, acceleration and story shear force for the structural disadvantage layer have been done, describe the displacement, acceleration and story shear force change over time under the influence of the infill walls.