Abstract
This research proposes connection configurations of two types for non-intersecting H-section steel beam and column. To elucidate the mechanical behavior of the proposed connections, full-scale moment connection tests and finite element analyses were conducted using T-shaped partial frame models. Comparisons between the proposed connections and regular intersecting connections demonstrate that the proposed connection is able to provide sufficient stiffness and energy-dissipation capacity if the beam and column flanges are designed to provide sufficient shear resistance. Then to understand the global behavior of frames using the proposed connections, pushover analyses of a two-story two-span frame were conducted. Because the bending moment of the beam acts on the column by a torque through the proposed connections, torsion spring models were incorporated for representing the proposed connections in 3D frame analysis. Analysis results showed that the girders and columns exhibited lower stiffness and strength than those of frames with intersecting connections because of torsion. To overcome this issue, torsion restraint by secondary beams with different configurations was discussed and optimal configuration was suggested. By utilizing the optimal configuration, torsion of girders and columns can be efficiently reduced into a similar level as that of regular intersecting connections.
Highlights
For smooth force transmission in steel moment resisting frames, it is preferred that beam members be connected to columns without eccentricity
This paper presents a proposal of bolted connections for non-intersecting beams and columns in steel moment frames to meet the architectural demands such that the column members are out of sight in the room
This research proposed bolted beam-to-column connections of two types for cases in which the beam does not intersect with the column. Their structural capacity was verified by cyclic loading tests for T-shaped partial frame specimens
Summary
For smooth force transmission in steel moment resisting frames, it is preferred that beam members be connected to columns without eccentricity. Yamada, Yoshie, Kouno, and Kojima (2010) investigated the structural performance of non-intersection type steel beam-to-column connections in which square hollow section columns were considered. The torsional behavior of a bracket between a non-intersecting beam and column was examined Good performance of those connections was demonstrated through loading tests and numerical analyses. Mirghaderi and Renani (2008) investigated rigid beamcolumn connections in which two continuous beams were welded to both sides of a built-up box section column with. This paper presents a proposal of bolted connections for non-intersecting beams and columns in steel moment frames to meet the architectural demands such that the column members are out of sight in the room. Based on the analysis results, configurations of the secondary beam were discussed on restraining the torsion of girders and columns attributable to non-intersecting connections
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