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See detailCarrying capacity of stainless steel columns in the low slenderness range.
Rossi, Barbara ULg; Rasmussen, Kim J.R.

in Journal of Structural Engineering (in press)

The strength of thin-walled stainless steel columns has been investigated extensively over the past few years. In European standards, the concept of section classification for determining the cross ... [more ▼]

The strength of thin-walled stainless steel columns has been investigated extensively over the past few years. In European standards, the concept of section classification for determining the cross-section capacity is used. In this system, for Class 4 cross-sections, the Effective Width Method (EWM) must be used to account for the effect of local buckling. Because of the complexity and limitations of this method, other methods have been developed, such as the Direct Strength Method (DSM) for cold-formed thin-walled profiles and the Continuous Strength Method (CSM), initially established for members made of nonlinear metallic materials. In the CSM, to take advantage of strain hardening, a deformation-based design approach employing a continuous relationship between the cross-sectional slenderness and the cross-sectional deformation capacity is used. To a large extent, the CSM yield accurate predictions, especially in the low slenderness range where the current DSM design procedures for members submitted to pure compression tends to produce conservative predictions, for materials with pronounced strain hardening such as stainless steel alloys. The present paper presents an extension of the traditional DSM which provides accurate design strength predictions in the low slenderness range for stainless steel thin-walled section columns failing by distortional, local and overall buckling. It contains practical information concerning the reference experimental data and draws conclusions about the justification of the proposed analytical formula. The paper is divided into three main parts: the description of the database, the establishment of the design model and a reliability analysis of the method. [less ▲]

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See detailPatching Asymptotics Solution of a Cable with a Small Bending Stiffness
Denoël, Vincent ULg; Canor, Thomas ULg

in Journal of Structural Engineering (2013), 139

The analysis of a cable with a small bending stiffness is a problem encountered in many engineering applications such as the fatigue assessment of stay cables, the modeling of pipeline laying operation or ... [more ▼]

The analysis of a cable with a small bending stiffness is a problem encountered in many engineering applications such as the fatigue assessment of stay cables, the modeling of pipeline laying operation or the determination of bending stresses in drillpipe assemblies. Because this phenomenon is modeled by a singularly perturbed equation, standard numerical techniques fail to solve these problems efficiently. As an alternative, provided the complexity of the analytical developments does not preclude their application, these problems may be tackled with appealing analytical procedures such as matching asymptotics or multiple scales. Otherwise advanced numerical simulations combining patching asymptotics within a numerical framework are the only possible approach for problems where the governing equations are too complex. Patching asymptotics also features a number of merits such as the possibility of using a boundary layer with a finite extent. Aiming at a better understanding of this latter technique, it is considered here to determine the solution of a cable with a small bending stiffness. Interesting details about patchability conditions and about how to restore higher derivatives continuity are included. The accuracy of the patching asymptotics approach is also compared with that of matched asymptotics. [less ▲]

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See detailCombined distortional and overall flexural-torsional buckling of cold-formed stainless steel sections: Design
Rossi, Barbara ULg; Jaspart, Jean-Pierre ULg; Rasmussen, Kim J.R.

in Journal of Structural Engineering (2010), 136(4), 361-369

This paper provides a critical summary of the European standards and design methods available for calculating the strength of cold-formed stainless steel compression members. The standards considered (so ... [more ▼]

This paper provides a critical summary of the European standards and design methods available for calculating the strength of cold-formed stainless steel compression members. The standards considered (so far mainly applied to columns failing by flexural buckling) are applied to the case of lipped channel section columns failing by combined distortional and overall flexural-torsional buckling. As observed during the tests presented in a companion paper, distortional buckling is found to have a considerable effect on the cross-section resistance and is prone to interact with the global flexural-torsional mode. It is investigated how the different formulations account for the two buckling modes and their interaction and how accurate strength predictions they provide. A new Direct Strength Method taking into account these failure modes is then presented and compared to the tests results. [less ▲]

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See detailCombined distortional and overall flexural-torsional buckling of cold-formed stainless steel sections: Experimental investigations
Rossi, Barbara ULg; Jaspart, Jean-Pierre ULg; Rasmussen, Kim J.R.

in Journal of Structural Engineering (2010), 136(4), 354-360

This paper presents a series of 48 full-scale tests on press-braked stainless steel lipped channel section columns subjected to concentric compression. The tests were carried out between fixed ends in the ... [more ▼]

This paper presents a series of 48 full-scale tests on press-braked stainless steel lipped channel section columns subjected to concentric compression. The tests were carried out between fixed ends in the Structures Laboratory of the University of Liège and the test specimens were designed such that distortional buckling developed in the section prior to overall flexural-torsional buckling. The stainless steel alloy was 1.4003 chromium weldable steel, popularly known as 3Cr12. Three different geometries were tested using the same experimental set-up. A critical summary of the standards and methods for calculating the carrying capacity of cold-formed stainless steel compression members is presented in a companion paper by the same authors. [less ▲]

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See detailComputer modeling of restrained reinforced concrete slabs in fire conditions
Lim, Linus; Buchanan, Andrew; Moss, Peter et al

in Journal of Structural Engineering (2004), 130(12), 1964-1971

This paper describes the computer modeling of axially restrained, one-way reinforced concrete slabs in fire conditions. The study was carried out for slabs with pin supports and slabs with rotationally ... [more ▼]

This paper describes the computer modeling of axially restrained, one-way reinforced concrete slabs in fire conditions. The study was carried out for slabs with pin supports and slabs with rotationally restrained supports. A single span, 5 m slab, carrying a uniformly distributed load was analyzed using a special purpose, nonlinear finite element program, SAFIR. The study for pin-supported slabs considered the effects of the position of the thrust force at the supports and different axial restraint stiffnesses. The effects of axial restraint on slabs with rotationally restrained supports were also investigated. The analyses found that the behavior of pin-supported slabs is very sensitive to the position of the thrust force at the end supports and the axial restraint stiffnesses. Slabs with rotationally restrained supports are predicted to have much better fire resistance than equivalent pin-supported slabs due to moment redistribution. The behavior of rotationally restrained slabs in fire conditions is less sensitive to the different axial restraint stiffnesses than pin supported slabs. [less ▲]

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See detailStability of Steel Columns in Case of Fire : Experimental evaluation
Franssen, Jean-Marc ULg; Talamona, didier; Kruppa, Joël et al

in Journal of Structural Engineering (1998), 124(2), 158-163

This paper explains how the buckling curve for steel columns subjected to fire that had been derived on the base on extendive numerical simulations have been calibrated against a wide set of full scale ... [more ▼]

This paper explains how the buckling curve for steel columns subjected to fire that had been derived on the base on extendive numerical simulations have been calibrated against a wide set of full scale experimental test results. The model has eventually been incorporated in Eurocode 3. [less ▲]

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See detailStability of Steel Columns in Case of Fire : Numerical Modelling
Talamona, didier; Franssen, Jean-Marc ULg; Schleich, Jean-Baptiste et al

in Journal of Structural Engineering (1997), 123(6), 713-720

This paper describes the numerical simulations that have been performed within the frame of an ECSC reserch project. This research project lead to the buckling curve that has been considered in Eurocode 3 ... [more ▼]

This paper describes the numerical simulations that have been performed within the frame of an ECSC reserch project. This research project lead to the buckling curve that has been considered in Eurocode 3 for the design of steel colmns subjected to fire. [less ▲]

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See detailAnalysis of structural members under elevated temperature conditions- Discussion
Franssen, Jean-Marc ULg

in Journal of Structural Engineering (1996), 10

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See detailThe Stiffened Sheathings of Orthotropic Cylindrical Shells
Rigo, Philippe ULg

in Journal of Structural Engineering (1992)

Detailed reference viewed: 35 (1 ULg)
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See detailMoment rotation curves for bolted connections
Maquoi, René ULg; Jaspart, Jean-Pierre ULg

in Journal of Structural Engineering (1987), 113(N°10), 2324-2329

Detailed reference viewed: 33 (0 ULg)