This study investigated the behavior of longitudinal plate-to-rectangular hollow section (RHS) K-connections to which concrete-filled composite branch members were jointed. At the connections, longitudinal plates with or without chord face stiffener were welded to the RHS chord member and the branch members were connected to the longitudinal plates by bolting (slip-critical connection). Cyclic tests were performed for three longitudinal plate-to-RHS K-connection specimens. The tests showed that the connection behavior was dominated by the plastification of the thin chord face and by the slip and hole-bearing resistance of the bolted joint. Chord face plastification was prevented or delayed by using the stiffened longitudinal plate. The strengths of the plate-to-RHS K-connections with or without the chord face stiffener, depending on the governing limit states, were estimated in accordance with current design codes, and the results were compared with the test results.

中文翻译：

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纵向板-矩形空心结构截面K型连接在循环荷载作用下的行为

这项研究调查了纵向板到矩形空心截面（RHS）K型连接的行为，混凝土连接的复合分支构件与该K型连接相连。在连接处，将带有或不带有弦面加强筋的纵向板焊接到RHS弦杆构件上，并将分支构件通过螺栓连接（纵向滑动连接）连接到纵向板上。对三个纵向板至RHS K连接试样进行了循环测试。测试表明，连接行为主要由薄弦杆面的塑化以及螺栓连接的抗滑移和承压性能决定。通过使用加强的纵向板，可防止或延迟弦面塑化。带有或不带有弦面加劲肋的板到RHS K连接的强度，