Seismic resisting capacity of existing brick/block masonry buildings in Shanghai, China is evaluated. Four apartment buildings are examined in this study. The seismic capacity is evaluated by an extended application of the seismic screening method proposed in Japan for reinforced concrete buildings. The evaluated seismic capacities are examined by a dynamic response analysis. Evaluating interstory deflection responses, seismic performance of these masonry buildings is examined during the small-scale, moderate-scale and large-scale ground motions, respectively, employed in the seismic design in Shanghai. Judged are these buildings seriously damaged during an intense ground motion. In this study herein, using one of traditional technologies, a retrofitting scheme is proposed for the buildings strengthened by placing new reinforced concrete shear walls along existing walls. The proposed retrofitting scheme is examined and verified by a dynamic response analysis.
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