The Influence Of Infilled Walls On Sesmic Performace Of Reinforced Concrete Frame Structure

The reinforced concrete frame structure with infilled walls has been widely used in the engineering, for the advantage of flexible layout and it fulfill the function demand in use of large-bay. But because the mechanism of interaction between the infilled walls and main part of the frame structure is complex, in the design process, designers usually consider the frame as a pure frame, neglecting considering the influence of in-filled walls on the structure. A large number of existing data indicate that the infilled 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. Therefore it is necessary to consider the influence of the infilled walls of the structure in the process of seismic design. Main research work in this thesis is summarized as follows.1、 In this paper, considering the influence of infilled walls on frame structure, build a reasonable mathematical model, regarding the infilled walls as seismic shear walls and framework are computing in parallel. With ETABS analysis software, considering the number of the infilled walls and different arrangement, found the influence of the infilled walls on frame structure by calculation and analysis.2、 Using the ETABS analysis software, in the circumstances of different quantity of infilled walls,5structure models with different filling rate of the infilled walls have been built:A (infilled rate is0%), B (infilled rate is25%), C (infilled rate is50%), D (infilled rate is75%) and E (infilled rate is100%). In the circumstances of same quantity of infilled walls (infilled rate is50%), and different location of infilled walls,4structure models have been built:C(filling infilled walls in story1-4), F(filling infilled walls in story5-8), G(filling infilled walls in story1-2and7-8) and H(filling infilled walls in story3-6). Through the model analysis and the response spectrum analysis, found the change rule of the structure period and the layer displacement in the circumstances of different quantity and different location of infilled walls respectively. With the increase of the number of infilled walls, the structure period gradually decreases, while the maximum of the story displacement and the displacement between floors also reduce. And points out that the stiffness effect of the infilled walls at the bottom of the structure is relatively obvious, and seismic measures of the bottom of the structure should be strengthen in the steucture design.3、 Considering the different quantity and different location of infilled walls respectively, made a time-history analysis to the models with with three different seismic waves (EL-Centro wave and TAFT wave, and a artificial earthquake wave). Through calculating, the results are compared with the results of the response spectrum analysis, which indicate they are in good agreement, which in turn suggest that that this method is feasible.