Abstract:This article briefly introduces the seismic safety community and the composition and performance parameters of buckling-restrained braces.The seismic safety community is the community that experiences small destructive earthquakes.Specifically, these communities have carried out effective seismic fortification of all buildings in compliance with seismic hazard regulations.In the seismic safety community, improving the seismic performance of buildings is the primary goal.Local seismic fortifications meet the minimum seismic requirements, and the level of fortification of buildings is increased using certain technical measures.The traditional method of seismic fortification is to increase the size of major structural components, such as beams, columns, and shear walls, and to improve the ratio of reinforcements to buildings.However, increasing the amount of material increases cost and reduces the usable area of buildings.The new method calls for change to the seismic characteristics of the structure itself and improvements to its capacity for energy dissipation through the use of isolation and dissipation technologies.In the structural system, the seismic sections generally remain the same, and cost increases are small.Buckling-restrained braces have gained widespread application as measures for energy dissipation and earthquake resistance.They also overcome the disadvantages of traditional energy dissipation braces.The component's full section will yield during compression, effectively minimizing local buckling failure and overall buckling failure.Therefore, the energy dissipation capacity of the components is maximized and the seismic response of the structure is reduced.The Dalian Aonan Mingxiu manor project described in the paper is a pilot project undertaken in the Dalian earthquake safety community.The project addresses building security and earthquake safety at the design stage.By installing buckling-restrained braces, the seismic characteristics of the structure itself are changed.To determine whether the structure can achieve the goals of seismic fortification, the project conducts an elastic-plastic analysis by installing buckling-restrained braces in the original frame structure.In this study, the ABAQUS software was used to conduct the dynamic and time-history analysis of two models of reinforced concrete framework: the origin structure and the structure with buckling-restrained braces added.The shock absorption effects of the buckling-restrained braces were analyzed.The results of the analysis showed that buckling-restrained braces could significantly reduce the inter-storey drift angle of a reinforced concrete frame during rare earthquakes and improve the level of seismic fortification buildings.
