Joint flexibility in steel frames

1989 ◽  
Vol 16 (3) ◽  
pp. 413-414
Author(s):  
André Picard
Keyword(s):  
Steel Frames ◽  
Joint Flexibility

scholarly journals Stability analysis of steel frames with semirigid connections and semirigid connections with rigidzones

2001 ◽  
Vol 23 (3) ◽  
pp. 134-148 ◽  
Author(s):  
Vu Quoc Anh
Keyword(s):  
Stiffness Matrix ◽  
Axial Load ◽  
Steel Frames ◽  
Beam Element ◽  
Force Distribution ◽  
Joint Flexibility ◽  
Geometric Stiffness ◽  
Semirigid Connections ◽  
Plane Frames ◽  
Insight Into

To obtain an accurate insight into the behavior of most realistic steel frames, joint flexibility should be allowed for in the analysis since connection flexibility affects both force distribution and deformation in beams and columns of the frames. This paper proposes a method to establish the geometric stiffness matrix and stiffness matrix for semirigid beam element and semirigid beam element with rigidzones. The proposed method can also applied to analyse frame stability with rigid, semirigid and simple connections with rigidzones or without rigidzones. In addition, an approach that evaluates the effective lengthμ factor, thecritical axial load of column in plane frames with rigid, semirigid, and simple connections is also presented.

Effects of joint flexibility on the behavior of steel frames

1987 ◽  
Vol 26 (5) ◽  
pp. 719-732 ◽  
Author(s):  
Wai-Fah Chen ◽  
Eric M. Lui
Keyword(s):  
Steel Frames ◽  
Joint Flexibility

Discrete optimization of semi-rigid steel frames in second-order analysis

2019 ◽  
Author(s):  
Marcos Henrique Bossardi Borges ◽  
Adelano Esposito ◽  
Herbert Gomes
Keyword(s):  
Discrete Optimization ◽  
Steel Frames ◽  
Second Order ◽  
Order Analysis

EXPERIMENTAL INVESTIGATION ON WAIST-INDUCED SWAY COLLAPSE OF STEEL FRAMES

1982 ◽  
Vol 315 (0) ◽  
pp. 48-60
Author(s):  
Tsuneyoshi NAKAMURA ◽  
Osamu OHTA ◽  
Koji UETANI
Keyword(s):  
Experimental Investigation ◽  
Steel Frames

Comparison of steel frames with RWS and WFP beam-to-column connections through seismic fragility analysis

2020 ◽  
pp. 136943322097728
Author(s):  
Haoran Yu ◽  
Weibin Li
Keyword(s):  
Limit State ◽  
Pushover Analysis ◽  
Steel Frames ◽  
Fragility Analysis ◽  
Structural Safety ◽  
Seismic Fragility ◽  
Fe Modelling ◽  
Collapse Resistance ◽  
Seismic Collapse ◽  
Probabilistic Seismic Demand

Reduced web section (RWS) connections and welded flange plate (WFP) connections can both effectively improve the seismic performance of a structure by moving plastic hinges to a predetermined location away from the column face. In this paper, two kinds of steel frames—with RWS connections and WFP connections—as well as different frames with welded unreinforced flange connections were studied through seismic fragility analysis. The numerical simulation was conducted by using multiscale FE modelling. Based on the incremental dynamic analysis and pushover analysis methods, probabilistic seismic demand analysis and seismic capability analysis were carried out, respectively. Finally, combined with the above analysis results, probabilistic seismic fragility analysis was conducted on the frame models. The results showed that the RWS connection and WFP connection (without double plates) have little influence on reducing the maximum inter-storey drift ratio under earthquake action. RWS connections slightly reduce the seismic capability in non-collapse stages and improve the seismic collapse resistance of a structure, which exhibits good structural ductility. WFP connections can comprehensively improve the seismic capability of a structure, but the seismic collapse resistance is worse than that of RWS connections when the structure has a large number of storeys. The frame with WFP connections has a lower failure probability at every seismic limit state, while the frame with RWS connections sacrifices some of its structural safety in non-collapse stages to reduce the collapse probability.

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