This paper summarizes on-going studies of the ATC-116 Project to investigate solutions to the short-period building performance paradox - Why do analytical models of code compliant designs predict high probabilities of collapse for short-period buildings contrary to damage observed in actual earthquakes and the judgement of earthquake engineers? The ATC-116 Project studies are intended to: (1) investigate the major causes and practical solutions to the performance paradox of short-period buildings; (2) improve, calibrate, and validate existing and improved analytical modeling methods with observed performance of buildings in recent earthquakes and full-scale shake table building tests; and (3) provide practical recommendations for improving design practice and requirements in building codes and standards. Topical studies of light-frame wood buildings related to the first two objectives are essentially complete and similar studies of short-period reinforced masonry shear wall buildings are underway. The third objective necessarily requires acceptance from a broad community involved in the design and construction of buildings and a workshop is planned for late 2016 to get input from stakeholders regarding development of recommendations for improving design practice and building codes and standards. This paper provides an overview of only short-period light-frame wood building studies through the current phase of the project.
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