Equivalent bow imperfections for design by second order inelastic analysis

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 2068-2077
Author(s):  
Fiona Walport ◽  
Leroy Gardner ◽  
David Nethercot
Keyword(s):  
Second Order ◽  
Inelastic Analysis

A Novel Incremental Iterative Force Recovery Method for Second-Order Beam-Column Elements in Plastic Hinge Analysis of Steel Frames

2021 ◽  
Author(s):  
Yi-Qun Tang ◽  
He Zhu ◽  
Er-Feng Du
Keyword(s):  
Plastic Hinge ◽  
Steel Frames ◽  
Direct Analysis ◽  
High Accuracy ◽  
Second Order ◽  
Single Element ◽  
Recovery Method ◽  
Inelastic Analysis ◽  
Force Recovery ◽  
Plastic Hinge Method

This paper is concerned with an incremental iterative force recovery method in the second-order plastic hinge analysis of steel frames mainly modelled by a single element per member. Second-order beam-column elements are preferred in the direct analysis of steel frames due to their high accuracy and efficiency. However, formulations of these elements are complicated, and therefore they may have a problem of getting element force recovery in inelastic analysis. To overcome this difficulty, a novel incremental iterative force recovery method for second-order beam-column elements is proposed to perform plastic hinge analysis. The proposed method is derived more strictly and has good performance. Also, the section assemblage approach and the refined plastic hinge method are adopted in this study to consider the gradual degradation of section stiffness in the plastic hinge analysis. To verify the accuracy, efficiency and robustness of the proposed method, several benchmark examples are analyzed by the proposed method and compared with solutions reported by early researchers.

A Second-Order Inelastic Analytical Method on Semirigid Connections Steel Frame

2010 ◽  
Vol 163-167 ◽  
pp. 760-765
Author(s):  
Jian Liu ◽  
Xiang Yun Huang ◽  
Ji Ping Hao ◽  
Guan Gen Zhou ◽  
Deng Feng Peng
Keyword(s):  
Axial Force ◽  
Steel Structure ◽  
Steel Frame ◽  
Second Order ◽  
Frame Structures ◽  
Stability Function ◽  
Inelastic Analysis ◽  
Semirigid Connections ◽  
Steel Frame Structures ◽  
Shearing Deformation

A second-order inelastic analysis of semirigid connection steel frame structures is developed. Therein, shearing deformation and axial force simultaneously are considered. A new stability function considered shearing deformation and axial force simultaneously is proposed and the analysis methods for steel structure of semirigid connection based on the structural ultimate bearing capacity are established. The calculatical programe of second-order inelastic analysis semirigid connection steel frame structures is compiled. The numerical examples of steel frames for semirigid connection are analysed using the second-order inelastic analysis in the paper. Load–displacements predicted by the proposed analysis compare well with those given by other approaches. The analysis results show that the proposed method is suitable for adoption in practice.

Practical second-order inelastic analysis for steel frames subjected to distributed load

2004 ◽  
Vol 26 (1) ◽  
pp. 51-61 ◽  
Author(s):  
Seung-Eock Kim ◽  
Jong-She Lee ◽  
Se-Hyu Choi ◽  
Chang-Sung Kim
Keyword(s):  
Steel Frames ◽  
Second Order ◽  
Inelastic Analysis ◽  
Distributed Load
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