Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8992
Title: Advanced analysis of imperfect portal frames with semirigid base connections
Authors: Chan, SL 
Huang, HY
Fang, LX
Keywords: Connections
Finite element method
Frames
Hinges
Imperfection
Inelastic action
Semi-rigid
Issue Date: 2005
Publisher: American Society of Civil Engineers
Source: Journal of engineering mechanics, 2005, v. 131, no. 6, p. 633-640 How to cite?
Journal: Journal of engineering mechanics 
Abstract: A robust finite element procedure for large deflection and inelastic analysis of imperfect steel frames with semirigid base is proposed and the nonlinear behavior of semirigid frames with various modes of initial imperfection is studied. Special consideration to the method of simulating the frame initial imperfections is given. The refined plastic hinge method is used for modeling of the section plastification and both the notional force and the initially imperfect geometry of the frames obtained by an eigenvalue buckling analysis are used for modeling the geometrical imperfections. The difference between the notional force and the eigenbuckling mode models and of semirigid base connections are studied. From the examples reported in this paper, the effective length is not required to be assumed and the advanced analysis is noted to be applicable to practical design of this type of steel frames.
URI: http://hdl.handle.net/10397/8992
ISSN: 0733-9399
EISSN: 1943-7889
DOI: 10.1061/(ASCE)0733-9399(2005)131:6(633)
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