AISC 812-99 PDF Download

Design Guide 12, titled "Modification of Existing Steel Welded Moment Frame Connections for Seismic Resistance," focuses on providing guidelines for the rehabilitation of welded steel moment frame buildings to enhance their resilience against seismic events. This standard provides engineers and practitioners with a comprehensive framework for modifying existing connections in order to meet the seismic design requirements set forth by the American Institute of Steel Construction (AISC).

The guide specifically addresses the modification of welded moment frame connections, which are critical components for transferring forces and resisting seismic loads. It offers detailed instructions and recommendations for identifying existing connection deficiencies, selecting appropriate rehabilitation techniques, and implementing the necessary modifications. The ultimate goal of this standard is to extend the service life of steel moment frame buildings and ensure their ability to withstand future seismic events efficiently and safely.

Design Guide 12 provides valuable information on the analysis and design considerations for different types of connection modifications, including strengthening existing connections, replacing damaged components, and retrofitting connections for increased ductility. It also includes provisions for assessing the performance and capacity of the modified connections and provides guidance on seismic detailing requirements. This standard acts as a valuable resource for engineers and designers seeking to upgrade existing steel moment frame buildings to achieve improved seismic resistance and ensure the safety of occupants.