FEMA P-58 PHASE 2 - DEVELOPMENT OF PERFORMANCE-BASED SEISMIC DESIGN CRITERIA

In 2012, the Applied Technology Council (ATC) completed a 10-year program under contract with the Federal Emergency Management Agency (FEMA) to develop a next-generation methodology for seismic performance assessment of buildings. Collectively referred to as FEMA P-58, Seismic Performance Assessment of Buildings, Methodology and Implementation, the resulting products describe a general methodology and recommended procedures to assess the probable seismic performance of individual buildings based on their unique site, structural, nonstructural, and occupancy characteristics. Recently, FEMA funded a subsequent phase of work to utilize the performance assessment methodology in benchmarking the performance of U.S. model codes and seismic design standards, and developing performance-based seismic design criteria. In this methodology, seismic performance is characterized on a probabilistic basis in terms of the potential for incurring damage or losses in the form of repair costs, repair time, casualties, unsafe placarding, and environmental impacts. Seismic design objectives under consideration include protection of life, limitation of repair costs and repair time, and functional performance, as measured by FEMA P-58 procedures and performance metrics. This paper presents the initial findings and directions of the new 5-year program for development of performance-based seismic design criteria.