Study on Performance-based Seismic Evaluation Method for Masonry-infilled Frame Structures

Combined with performance grades of reinforced concrete structures at home and abroad,the seismic performance of masonry-infilled frame structures can be divided into five levels: basically normal,slight damage,medium damage,severe damage and collapse prevention.The limit states of all seismic performance levels and their dominating parameters of masonry-infilled frame structures are put forward,and quantified performance index of this structure are obtained on the basis of statistical test data.The seismic responses of pure and masonry-infilled frame structures are compared by using capacity spectrum method and equivalent strut model,and the result indicates that the structure could meet predetermined performance objective under the minor and major earthquake levels by comparing the practical story drift and proposed performance index.