![]() ![]() (1977) showed that connections with a smaller branch width than the chord could not develop the full moment capacity of the branch without reinforcing through a series of 29 different connection tests considering 5 different configurations (unreinforced, branch flange reinforcing plates, chord flange stiffeners, haunch, and truncated pyramid). However, this study did not consider the potential loss of moment capacity due to the presence of axial load. Jubb and Redwood (1966) showed that when the branch section had an equal width to the chord section (β=1) the full moment capacity of the HSS member could be achieved without reinforcement. Many of the early studies of these connections focused on the ability of the connection to develop the full moment capacity of the branch member. Typical Vierendeel truss system with square and rectangular HSS members 1977), but their use required an understanding of how to transfer moment between HSS-to-HSS T-connections.įigure 1. ![]() Originally conceived in 1896 by Arthur Vierendeel, it was not until HSS were developed that the potential for Vierendeel trusses started to be realized (Korol et al. As a result of this configuration, the chord-to-web connection undergoes significant bending along with shear and axial loads and is not considered a pinned connection as is commonly done in typical truss systems. These systems are often formed by square or rectangular top and bottom chords that are connected with square or rectangular vertical web (branch) members (Figure 1). The majority of static studies focusing on these connections have considered Vierendeel truss systems. Moment connections made of rectangular and square hollow structural sections (HSS) have received less consideration compared to HSS-to-HSS connections made up of axially loaded members (T-, Y-, cross-, and K-connections). Square and Rectangular HSS-to-HSS Moment ConnectionsĪssociate Professor, Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI, USA Square and Rectangular HSS-to-HSS Moment Connections. ![]()
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