Limit states design considerations for gusset plates

Abstract

Abstract In spite of the extensive use of gusset plates as connecting elements in a variety of structures over the years, current design criteria are essentially based on very limited research work, and primarily of elastic analytical background. For example, North American design practice uses the results of the elastic model studies of Whitmore, obtained through research that was completed in 1952. With these things in mind, the paper discusses the design considerations that must be made when designing for ultimate strength, specifically, utilizing the limit states design formulation. Thus, limit states design models are described for tension and compression applications of gusset plates, although it is noted that much more research is needed before the criteria for compression can be considered as complete. Of particular interest are the second-order deformation effects in gusset plates; these are recent findings in experimental studies. It is demonstrated how load application and direction as well as type and orientation of the boundary connections have a major influence on the strength and behavior of these plates. A final summary itemizes the design checks that should be made.