Techno Press


Steel and Composite Structures   Volume 13, Number 6, December 2012, pages 539-560
DOI: http://dx.doi.org/10.12989/scs.2012.13.6.539
 
Ultimate load capacity of unit Strarch frames using an explicit numerical method
Kyoungsoo Lee, Jung-Wuk Hong and Sang-Eul Han

 
Abstract     [Full Text]
    This study uses an explicit numerical algorithm to evaluate the ultimate load capacity analysis of a unit Strarch frame, accounting for the initial imperfection effects of the stress-erection process. Displacement-based filament beam element and an explicit dynamic relaxation method with kinetic damping are used to achieve the analysis. The section is composed of the finite number of filaments that can be conveniently modeled by various material models. Ramberg-Osgood and bilinear kinematic elastic plastic material models are formulated to analyze the nonlinear material behaviors of filaments. The numerical results obtained in the present study are compared with the results of experiment for stress-erection and buckling of unit Strarch frames.
 
Key Words
    Strarch; stress-erection process; bucking analysis; filament element; dynamic relaxation method.
 
Address
Kyoungsoo Lee, Jung-Wuk Hong : Department of Civil and Environmental Engineering, KAIST, Daejeon 305-701, Korea
Sang-Eul Han : Department of Architectural Engineering, School of Architecture, Inha University, Incheon 402-751, Korea
 

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