Simplified Second-Order Analysis of Semirigid Connected Steel Frames

2012 ◽  
Vol 446-449 ◽  
pp. 846-852
Author(s):  
Wei Liang Xu ◽  
Jian Xu
Keyword(s):  
Steel Frames ◽  
Horizontal Displacement ◽  
Steel Frame ◽  
Second Order ◽  
Preliminary Design ◽  
Distribution Method ◽  
Order Analysis ◽  
Partial Frame ◽  
Computation Formula ◽  
Model Flexibility

The aim of this paper is to present a practical yet simplified method in the second-order analysis of semirigid connected steel frames. Based on the principle of new shear force distribution method, by taking partial frame as an analytical subassembly model and using a rotation spring which has variable bending stiffness to model flexibility of beam-column connection, this paper derives a simplified non-iterative inner force and lateral deflection computation formula considering P-Delta effects on semirigid connected steel frames. The numerical examples show that semirigid of beam-column connections obviously increases the horizontal displacement and P-Delta effect on the steel frame. Therefore the influences of semirigid connection should been considered in second-order analysis of building steel frame. The presented method is not only relatively practical and easily applicable to manual computation but also has a rather high accuracy, and can be used by the engineers in preliminary design for semirigid connected steel frames.

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

Lateral-torsional buckling checks of steel frames using second-order analysis

2012 ◽  
Vol 5 (2) ◽  
pp. 71-86 ◽  
Author(s):  
Matthias Wieschollek ◽  
Nicole Schillo ◽  
Markus Feldmann ◽  
Gerhard Sedlacek dec.
Keyword(s):  
Steel Frames ◽  
Second Order ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Order Analysis

Second-order analysis for semirigid steel frame design

2001 ◽  
Vol 28 (1) ◽  
pp. 59-76 ◽  
Author(s):  
Lei Xu
Keyword(s):  
Steel Frame ◽  
Second Order ◽  
Rotational Behaviour ◽  
Analysis Method ◽  
Frame Design ◽  
Analysis And Design ◽  
Order Analysis ◽  
Rigid Frame ◽  
Structural Responses ◽  
Fixity Factor

This paper presents an analysis method in which both the nonlinear rotational behaviour of beam-to-column connections and second-order (P-Δ and P-δ) effects of beam-column members are explicitly taken into account. By adopting the concept of an end-fixity factor, the proposed method is comprehensive regardless of the end rotational conditions of beam-column members and applies to frames with any combination of pinned, semirigid and rigid beam-to-column connections. In addition, the end-fixity factor simplifies the analysis procedure for semirigid frames. More importantly, the end-fixity factor may be valuable to the design of such structures because it provides a physical interpretation of the extent of rigidity available in a connection. Thus, it provides a convenient way for designers to compare the structural responses of a semirigid member to that of a rigid one. Examples are presented to demonstrate the validity and efficiency of the proposed approach. With only minor modifications, the proposed method is readily implemented in existing rigid frame analysis and design computer programs.Key words: steel frame, semirigid connection, second-order analysis, P-Δ effect.

scholarly journals SECOND-ORDER ANALYSIS OF 2-D STEEL FRAMES AT ELEVATED TEMPERATURES

2011 ◽  
pp. 255-273
Author(s):  
J.Y.K. Chan ◽  
◽  
S.S.H. Cho ◽  
F.G. Albermani ◽  
◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Steel Frames ◽  
Second Order ◽  
Order Analysis
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