Performance-based seismic evaluation of masonry-infilled frames

The performance levels of frame structures and masonry-infilled walls together with corresponding inter-story drift limits were proposed by statistical analysis based on the current research results. A nonlinear finite element model was established for masonry-infilled frames. Nonlinear static analysis was performed for 6-,9-,and 12-story masonry-infilled frame structures under frequent, moderate and rare earthquakes and the inter-story drifts were obtained. According to the performance index, the seismic performances of masonry-infilled frames were evaluated and the inadequacy of the Chinese seismic code was pointed out. Based on the calculated results, a table for performance evaluation of masonry infilled frames is given for reference in practical use.