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Analytical study of beam-to-HSS/CFT column connections by trapezoidal external stiffener
Abstract Use of continuity plates in box columns is approved by design codes. To meet seismic parameters, considering performance problems and lack of confidence in the quality of the connections due to closed section, unsuitable vision and extreme welding and cutting at junction, continuity plates have been removed from the column and replaced by external stiffener. In this study, behavior of box beam-to-column connections with/without continuity plates, with external stiffener in two states with/without concrete (CFT/HSS) inside the column and finally reinforced connection by horizontal bar mats in CFT (Concrete Filled Tube) column have been studied by finite elements modeling and nonlinear analysis under monotonic and cyclic loadings. The results have shown that the use of external stiffener rather than continuity plate causes to increase 1% in rigidity and in turn 46.09% in strength. On the other hand, the use of filler concrete in column has caused to improve seismic behavior of the connection. When this connection containing the combination of external stiffeners and horizontal bar mats in CFT column is taken place, rigidity and strength parameters will be increased 3.01% and 108.8% respectively, compared to connections with no horizontal bar mats. In addition, the proposed connection has best performance in terms of both stress distribution and energy absorption and meets rigid connection criterion as well.
Analytical study of beam-to-HSS/CFT column connections by trapezoidal external stiffener
Abstract Use of continuity plates in box columns is approved by design codes. To meet seismic parameters, considering performance problems and lack of confidence in the quality of the connections due to closed section, unsuitable vision and extreme welding and cutting at junction, continuity plates have been removed from the column and replaced by external stiffener. In this study, behavior of box beam-to-column connections with/without continuity plates, with external stiffener in two states with/without concrete (CFT/HSS) inside the column and finally reinforced connection by horizontal bar mats in CFT (Concrete Filled Tube) column have been studied by finite elements modeling and nonlinear analysis under monotonic and cyclic loadings. The results have shown that the use of external stiffener rather than continuity plate causes to increase 1% in rigidity and in turn 46.09% in strength. On the other hand, the use of filler concrete in column has caused to improve seismic behavior of the connection. When this connection containing the combination of external stiffeners and horizontal bar mats in CFT column is taken place, rigidity and strength parameters will be increased 3.01% and 108.8% respectively, compared to connections with no horizontal bar mats. In addition, the proposed connection has best performance in terms of both stress distribution and energy absorption and meets rigid connection criterion as well.
Analytical study of beam-to-HSS/CFT column connections by trapezoidal external stiffener
Rezaifar, Omid (author) / Younesi, Adel (author)
International Journal of Steel Structures ; 17 ; 579-592
2017-06-01
14 pages
Article (Journal)
Electronic Resource
English
Analytical study of beam-to-HSS/CFT column connections by trapezoidal external stiffener
| Springer Verlag | 2017
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