Experiment on Bolted Beam-to-column Connections in Assembled Steel Storage Racks(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2013年03期
- Page:
- 71-77
- Research Field:
- Publishing date:
Info
- Title:
- Experiment on Bolted Beam-to-column Connections in Assembled Steel Storage Racks
- Author(s):
- ]CHENG Bo; WU Zhen-yu
- School of Civil Engineering, Harbin Institute of Technology
- Keywords:
- steel storage rack; beam-to-column connection; bolt; stiffness; ultimate bearing capacity; energy dissipation capacity
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to investigate stiffness, bearing capacity and energy dissipation capacity of bolted beamtocolumn connections used in assembled steel storage racks, two groups of connection specimens were tested under monotonic and cyclic loading respectively. The results indicate that changing the relative position of beams and connecting plates has influence on initial stiffness, ultimate bearing capacity and deformation property of beam-to-column connections. As the beam is close to the top margin of connecting plate, the part of connecting plate bearing the upward tension is silt by the bolt. The initial stiffness and ultimate bearing capacity of this kind of connection are the lowest. As the beam is welded to the middle or lower part of the connecting plate, there is no drop for the bearing capacity of connections after the beam rotates a large angle (exceeding 0.18 rad). For squeeze of bolts, the bolt holes in column webs become larger. One side of connecting plates welded on beams shows twisted deformation. In the monotonic loading test, the gap between bolt and bolt hole makes the slippage of bolt, which makes turning points arise in the moment-rotation curves of specimens. In the cyclic loading test, the momentrotation hysteretic curves of specimens show Z-shaped. For each loading grade, the energy dissipation coefficient and scant stiffness of connections decrease with loading cycles increasing.
Last Update: 2014-12-18