Seismic Rehabilitation of Existing Buildings: Seismic Rehabilitation of Existing Buildings

ASCE/SEI Standard 41-06, Seismic Rehabilitation of Existing Buildings, is the latest generation of performance-based seismic rehabilitation methodology. This new national consensus standard was developed from the FEMA 356, Prestandard and Commentary for the Seismic Rehabilitation of Buildings, which served as a starting point for the formal standard development process. ASCE/SEI Standard 41-06 represents state-of-the-art knowledge in earthquake engineering and is a valuable tool for the structural engineering profession to improve building performance in future earthquakes. It includes significant improvements in current understanding of building behavior in earthquakes, such as: Improved C-coefficients for calculation of the pseudo-lateral force and target displacement based on recommendations in FEMA 440. Comprehensive soil-structure interaction provisions including kinematic effects and foundation damping effects. Revised acceptance criteria for steel moment frames to reflect final conclusions of the SAC Joint Venture research. Expanded acceptance criteria for concentrically braced frames defined as a function of brace slenderness, compactness and level of connection detailing. Updated nonstructural provisions to be consistent with current NEHRP Provisions for new buildings. ASCE/SEI Standard 41-06 is a valuable tool for structural engineers and the public for improving seismic performance of existing buildings. The completion of the new Standard represents a considerable advancement for the engineering community.