Analysis On Seismic Behavior Of "V","K" And "X" Braced Reinforced Concrete Frame Structure

The RC frame structure can provide large space because of its flexible layout.The ductility of the structure is large and the energy dissipation ability is good.Because of its low cost and convenient construction,it has become a widely used aseismic structure system,which is mostly used in multi-storey and small high-rise buildings.When the building height of the frame structure is too high or the site is located in a high-intensity seismic area,it is difficult to meet the design requirements of the seismic code under the action of horizontal seismic force due to the insufficient lateral stiffness.The slant-reinforced concrete frame structure can make up for the defects of the pure frame structure,because the slant support can not only improve the lateral stiffness of the frame structure,but also add an anti-seismic line,making the slant-reinforced concrete frame structure become a more reasonable anti-seismic structure system.The static elastic-plastic and dynamic elastic-plastic analysis of the oblique braced RC frame was carried out using the finite element analysis software Midas building to study its seismic performance under rare earthquakes.Through comparative analysis of pushover curve,seismic performance point,maximum inter-storey displacement Angle,structural plastic hinge state and other seismic performance indicators,the seismic performance of RC frame structures with different forms of reinforced concrete slant-supported can be determined.In this paper,the seismic performance of RC frame structures with v-type,k-type and x-type reinforced concrete supports is analyzed,and the results show that the v-type,k-type and x-type reinforced concrete supports can improve the lateral stiffness of the frame structure,reduce the inter-storey displacement Angle and the maximum displacement of the top floor.Moreover,to a certain extent,the v-shaped reinforced concrete supports are superior to the other two forms of inclined supports in improving the seismic performance of the frame structure.