(01-29-2010, 02:40 AM)essenza Wrote: [ -> ]I see that not much have access to AISC journal. So i would like to request the following paper from Wiley
1. Stiffened steel box columns. Part 1: Cyclic behaviour
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2. Stiffened steel box columns. Part 2: Ductility evaluation
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Greeings
DE
Hi Donald,
Please find the attached requested Journals
1. Stiffened steel box columns. Part 1: Cyclic behaviour
Hanbin Ge , Shengbin Gao , Tsutomu Usami
Abstract
This paper aims to study the cyclic inelastic behaviour of stiffened steel box columns failed by local and overall interaction instability under a constant compressive axial force and cyclic lateral loading. Such columns find broad application in steel bridge piers. The columns are of box sections with longitudinal stiffeners. In the analysis, a modified two-surface plasticity model developed at Nagoya University is employed to model material non-linearity. For comparison, analyses using classical isotropic- and kinematic-hardening models are also carried out. Hysteretic curves and buckling modes obtained from analysis using the two-surface model and classical models are compared with experimental results. Moreover, the progression of deformation from occurrence of local buckling to structural failure is discussed in detail. The comparisons show that the use of an accurate plasticity model is quite important in the prediction of both the cyclic inelastic behaviour and failure characteristic of steel box columns failed by coupled local and overall instability. It is found that the modified two-surface model is a satisfactory model in predicting the cyclic hysteretic behaviour of both the thin- and thick-walled steel box columns.
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2. Stiffened steel box columns. Part 2: Ductility evaluation
Tsutomu Usami , Shengbin Gao, Hanbin Ge
Abstract
The purpose of this study is to evaluate the ultimate strength and ductility capacity of stiffened steel box columns failed by local and overall interaction instability under a constant compressive axial force and cyclic lateral loading. In a companion paper, a finite element formulation accounting for both geometrical and material non-linearity was developed to obtain cyclic hysteretic behaviour of such columns. In this paper, the effect of loading patterns on the cyclic inelastic behaviour is first studied; then, a parametric study is carried out to investigate the effects of flange plate width-thickness ratio parameter, column slenderness ratio parameter, stiffener's equivalent slenderness ratio parameter, magnitude of axial load, and material type of stiffeners on the strength and ductility of the columns. Last but not least, empirical formulae of both the ultimate strength and ductility capacities are proposed for stiffened steel box columns, and the limit values of various parameters for the required ductility demand are also discussed.
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Regards,
Epee