College of Architecture and Civil Engineering;
Beijing University of Technology;
Beijing 100124;
China;
Key Laboratory of Earthquake Engineering and Engineering Vibration;
Institute of Engineering Mechanics;
China Earthquake Administration;
Sanhe 065201;
China;
Beijing Institute of Architectural Design;
Beijing 100045;
China;
existing masonry structure; seismic retrofit; collapse simulation; PSRCW; nonlinear time history analysis;