Seismic Moment Connections for Moment-Resisting Steel Frames

摘要

This report provides an overview of the state of the art for the design of steel moment connections for regions of high seismic risk. The need for designing such connections to be ductile with the capacity to sustain full load reversals is indicated first. The generally accepted approach of 'strong columns-weak girders,' i.e., designing the joints to develop inelastic activity in the connections and beams rather than columns, is adhered to throughout the chapter. A major section of the report is devoted to presentation of experimental results to illustrate the observed behavior of beam-to-column connections and column panel zones under severe cyclic loadings simulating extreme seismic conditions. Procedures are given for seismic moment joint calculations pertaining to flange beam connections, web connections, and panel zone design. Typical seismic moment connections of beam-to-column flanges as well as to webs, and column splices are illustrated. The report concludes with an indication of some of the problems requiring further research.