Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Capacity analysis of gusset plate connections using the Whitmore, block shear, global section shear, and finite element methods
Highlights ► FE model response matched stress contours from original 1952 Whitmore experiment. ► Gusset plate in FE model of Whitmore’s connection was stronger than the members. ► FHWA direct tension method conservatively estimates FEM performance. ► Stress contours of FEA at capacity indicated that block shear failure could occur. ► The FE model’s failure mechanism was shearing across the gross horizontal plane.
Abstract The 2007 collapse of the I-35W Bridge in Minneapolis, Minnesota led to additional load rating requirements for gusset plates. The Federal Highway Administration provided the direct tension and block shear methods to assess tensile capacity for use in load rating, as well as a mechanics based method to assess shear capacity on critical planes. However, the three methods provide limited information about ultimate behavior for complex connections. Using finite elements, the authors modeled the connection from Whitmore’s 1952 study to evaluate the plate capacity and failure mechanism. The analysis showed that the direct tension method was conservative, but predicted neither capacity nor behavior. Model performance corresponded well with the critical block shear capacity load in the left diagonal, and shear capacity on the gross horizontal plane. Yielding on this plane began around critical bolt holes and spread to either side of the plate, forming the critical failure mechanism.
Capacity analysis of gusset plate connections using the Whitmore, block shear, global section shear, and finite element methods
Highlights ► FE model response matched stress contours from original 1952 Whitmore experiment. ► Gusset plate in FE model of Whitmore’s connection was stronger than the members. ► FHWA direct tension method conservatively estimates FEM performance. ► Stress contours of FEA at capacity indicated that block shear failure could occur. ► The FE model’s failure mechanism was shearing across the gross horizontal plane.
Abstract The 2007 collapse of the I-35W Bridge in Minneapolis, Minnesota led to additional load rating requirements for gusset plates. The Federal Highway Administration provided the direct tension and block shear methods to assess tensile capacity for use in load rating, as well as a mechanics based method to assess shear capacity on critical planes. However, the three methods provide limited information about ultimate behavior for complex connections. Using finite elements, the authors modeled the connection from Whitmore’s 1952 study to evaluate the plate capacity and failure mechanism. The analysis showed that the direct tension method was conservative, but predicted neither capacity nor behavior. Model performance corresponded well with the critical block shear capacity load in the left diagonal, and shear capacity on the gross horizontal plane. Yielding on this plane began around critical bolt holes and spread to either side of the plate, forming the critical failure mechanism.
Capacity analysis of gusset plate connections using the Whitmore, block shear, global section shear, and finite element methods
Rosenstrauch, Paul L. (Autor:in) / Sanayei, Masoud (Autor:in) / Brenner, Brian R. (Autor:in)
Engineering Structures ; 48 ; 543-557
31.08.2012
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2010
Whitmore Tension Section and Block Shear
| ASCE | 2018