Study On The Influence Of Infilled Walls On Seismic Behavior Of Reinforced Concrete Frame Structures

Infilled frame is a structure that is widely used at home and abroad,several large earthquakes in recent years, this structure has exposed many shortcomings in the earthquake, especially the neglect of synergy filling wall and frame structure structure design, directly caused by the earthquake disaster is enormous. Very practical significance so the effect of infilled walls on frame structure in earthquake research.The infilled frame structure as the main research object, for the previous frame filled wall structure seismic research, collate relevant theoretical knowledge to determine the research route, analysis method of calculation and comparison, selected using the equivalent bracing model and response spectrum analysis method, using SAP2000 software to establish 16 different filling model calculation and analysis of seismic condition, effects of different filling ratio, filling position and filling material filled wall on seismic performance of frame, obtained the following conclusions:(1) selection of the filling rate were six, 90%, 80% group of model 100%, 50%, 25% and 0% of the analysis period, layer built between the shear and layer displacement analysis of infilled wall frame structure seismic proof for the contribution with the increase of filling ratio increases, the higher the rate of self filling structure the vibration cycle is small, the interlayer displacement and side column shear layer is smaller.(2) with different vertical layout, horizontal layout, different wall openings and uniform wall uneven opening several control factors to build seven filling rate is 80% architectural model analysis to determine the different layout of the seismic performance of the structure will have a greater impact. Different vertical layout, with minimal floor form a weak layer when the weak layer in the bottom layer, the seismic performance of the structure is the worst; lateral arrangement is not at the same time, will form a layer filled with less weak column layout,seismic performance is weakened; the seismic performance of the window is not evenly distributed evenly arranged stronger, in addition window layout to avoid all arranged in the beam, prone to short column.(3) the same thickness of clay bricks, aerated concrete blocks and hollow concrete block filled wall frame three were used as filling materials filled wall, clay brick seismic frame structure is the worst, the best seismic performance of aerated concrete block.Influence of filling wall considering the filling ratio, filling position and filling material of the frame structure, the filling rate of the greatest impact on the overall seismic performance, effect of filling position on the seismic performance of local pillar, filling material is relatively balanced seismic effect. Based on the research results, put forward three suggestions for frame filled wall structure design: according to the filling material, filling rate and filling position to determine the vibration cycle reduction coefficient; according to the arrangement of infilled judgment with the existence of the weak layer and strengthen the design; determine weak column and short column position and strengthening design. In the design, the influence of infill wall on seismic performance is fully considered, and the structural design scheme is optimized to enhance the seismic performance of the structure.