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Steel Structural Stability in Civil Engineering
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Steel Structural Stability in Civil Engineering

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (20 July 2024) | Viewed by 2863

Special Issue Editors

Prof. Dr. Rodrigo Gonçalves

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Guest Editor
CERIS and Departamento de Engenharia Civil, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
Interests: steel and steel-concrete composite structures; structural stability; thin-walled structures
Dr. André Martins

E-Mail Website
Guest Editor
IDMEC (Mechanical Engineering Institute), Department of Mechanical Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
Interests: thin-walled structures; computational mechanics; cold-formed steel (CFS); structural stability; coupled phenomena; generalised beam theory (GBT); structural reliability; direct strength method (DSM) design
Special Issues, Collections and Topics in MDPI journals
Dr. Nuno Peres

E-Mail Website
Guest Editor Assistant
CERIS and Faculdade de Engenharia, Universidade Lusófona, Campo Grande 376, 1749-024 Lisboa, Portugal
Interests: steel structures; structural stability; thin-walled structures

Special Issue Information

Dear Colleagues,

Steel members have widespread applications in civil engineering structures, namely in bridges and buildings. The ongoing progress in computational tools and design codes, as well as aesthetic demands, is fostering the development of increasingly innovative and complex thin-walled steel load-carrying structural systems, which are generally highly susceptible to complex stability phenomena that need to be properly addressed during the design process.

This Special Issue aims to present recent high-quality original research concerning theoretical, numerical, experimental and design advances in the field of structural stability in civil engineering structures, including, but not limited to, the following:

  • Members (beams, columns, beam-columns) and structural systems;
  • Plates and shells;
  • Thin-walled members;
  • Advanced analysis methods;
  • Computational methods;
  • Carbon and stainless steel;
  • Static and seismic loading.

Dr. Rodrigo Gonçalves
Dr. André Martins
Guest Editors

Dr. Nuno Peres
Guest Editor Assistant

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • steel structures
  • structural stability
  • thin-walled members
  • cold-formed steel
  • non-linear behaviour and design
  • buckling

Published Papers (4 papers)

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Research

27 pages, 16744 KiB  
Article
Parametric Study on the Buckling of Unbraced Steel Frames under Fire Situation
by Thiago Silva, Carlos Couto, Paulo Vila Real and Nuno Lopes
Appl. Sci. 2024, 14(13), 5709; https://doi.org/10.3390/app14135709 - 29 Jun 2024
Viewed by 457
Abstract
A parametric investigation of several unbraced steel frames with regular and irregular geometry subjected to elevated temperatures is carried out in this study to determine the most accurate procedure and buckling lengths to be considered during the structural design under a fire situation. [...] Read more.
A parametric investigation of several unbraced steel frames with regular and irregular geometry subjected to elevated temperatures is carried out in this study to determine the most accurate procedure and buckling lengths to be considered during the structural design under a fire situation. In such conditions, the stiffness and strength of steel decrease considerably due to high temperatures, and uncertainty remains in the application of the fire design rules of Eurocode 3 Part 1-2 (EN 1993-1-2) for unbraced frames as no information is given regarding the treatment of the deformed geometry (the so-called second-order effects). More precisely, it is unclear in the norm whether the verification based on the buckling length concept could be used or if a second-order analysis to calculate the internal forces is sufficient to ensure the stability of the frame in case of fire. Based on the linear buckling analysis of the steel frames accounting for the temperature development during a fire, recommendations for the appropriate buckling lengths to be used are given. Finally, it is demonstrated that using the recommended buckling lengths together with the design rules of EN 1993-1-2 leads to results in favor of safety when compared to the results obtained with the finite element method. On the other hand, it is concluded that using second-order internal forces and the real length of the columns as the buckling length, as suggested for room temperature design, yielded results outside safety when compared with the finite element method, and this analysis and verification procedure should not be used for the case of fire. Full article
(This article belongs to the Special Issue Steel Structural Stability in Civil Engineering)
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28 pages, 9828 KiB  
Article
Global Analysis of Adjustable Pallet Rack Down-Aisle Frames Using the Generalised Beam Theory
by Jordi Bonada, Oriol Bové, Miquel Casafont and Ignasi López-Rull
Appl. Sci. 2024, 14(13), 5521; https://doi.org/10.3390/app14135521 - 25 Jun 2024
Viewed by 666
Abstract
A global analysis of a rack frame conducted using the Generalised Beam Theory (GBT) is presented. This study specifically focuses on a down-aisle frame, showing the particular characteristics of this type of structure, such as its perforated columns, semi-rigid joints, and significant second-order [...] Read more.
A global analysis of a rack frame conducted using the Generalised Beam Theory (GBT) is presented. This study specifically focuses on a down-aisle frame, showing the particular characteristics of this type of structure, such as its perforated columns, semi-rigid joints, and significant second-order effects. The single-column simplified approach is applied, meaning that the entire rack is modelled with one single column and its adjacent half-beams. This approach substantially reduces modelling time and allows for very quick parametric studies while adequately reproducing the general 2D down-aisle behaviour. The GBT single-column model is first verified against a similar single-column shell finite element model used by the authors in previous research. Afterwards, the model is applied to study the effects of various factors influencing the results of a rack global analysis, including perforations, imperfection magnitudes and combinations, and sectional deformations. The nature of GBT allows for deriving clear conclusions on the influence of these aspects on structural behaviour. Furthermore, this article also aims to demonstrate the potential advantages of the theory for performing global analyses of these structures in both research and design. Full article
(This article belongs to the Special Issue Steel Structural Stability in Civil Engineering)
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18 pages, 2261 KiB  
Article
An Assessment of the Eurocode 3 Simplified Formulas for Distortional Buckling of Cold-Formed Steel Lipped Channels
by André Dias Martins, Nuno Peres, Pedro Jacinto and Rodrigo Gonçalves
Appl. Sci. 2024, 14(11), 4924; https://doi.org/10.3390/app14114924 - 6 Jun 2024
Viewed by 448
Abstract
This paper concerns the Eurocode 3 Part 1-3 (EN 1993-1-3) methods for calculating the distortional buckling (bifurcation) load of cold-formed steel-lipped channels subjected to axial force, major and minor axis bending. More specifically, the paper presents the results of a parametric study that [...] Read more.
This paper concerns the Eurocode 3 Part 1-3 (EN 1993-1-3) methods for calculating the distortional buckling (bifurcation) load of cold-formed steel-lipped channels subjected to axial force, major and minor axis bending. More specifically, the paper presents the results of a parametric study that assesses the accuracy of the simplified method in EN 1993-1-3, which relies on direct/iterative hand calculations and an approximate mechanical model, through comparison with “exact” numerical results, obtained using semi-analytical linearized buckling analyses based on Generalized Beam Theory, which are also allowed by the code. Isoline error maps are presented for a wide range of geometric and material parameters, covering common commercial profiles and corresponding to a dataset of more than 24,000 cases. These maps make it possible to identify the parameter ranges leading to an acceptable error and, even though they strongly depend on the loading, general remarks concerning the expected error pertaining to the simplified method are drawn. Full article
(This article belongs to the Special Issue Steel Structural Stability in Civil Engineering)
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23 pages, 7751 KiB  
Article
Global Buckling Resistance of Cold-Formed Steel Beams with Omega-Shaped Sections
by Rita Peres, José Carvalho, Jean Antonio Emerick, Luís Macedo, José Luiz Rangel Paes and José Miguel Castro
Appl. Sci. 2024, 14(9), 3857; https://doi.org/10.3390/app14093857 - 30 Apr 2024
Viewed by 713
Abstract
The absence of analytical expressions in current codes for evaluating the critical moment for lateral–torsional buckling of cold-formed beams with omega-shaped sections presents a fundamental challenge when assessing their resistance to global buckling. In response to this challenge, a comparative study was conducted [...] Read more.
The absence of analytical expressions in current codes for evaluating the critical moment for lateral–torsional buckling of cold-formed beams with omega-shaped sections presents a fundamental challenge when assessing their resistance to global buckling. In response to this challenge, a comparative study was conducted to explore various approaches for calculating the critical moment. This involved both analytical and numerical analyses, using different methods available in codes and computational tools. The analytical analysis followed the Effective Width Method, employing the expression proposed in ENV 1993-1-1:1992, which is commonly used for evaluating the critical lateral–torsional moment of hot-rolled profiles. Numerical analyses were then performed using the ABAQUS v6.13, GBTUL v2.0, and CUFSM v5.05 software packages. The ABAQUS model, validated with results obtained from an experimental campaign, serves as the reference model. Upon assessing the bending moment resistances according to European, Brazilian, and American standards, consistency was found among these standards. However, it became evident that using the analytical expression proposed for hot-rolled profiles is inadequate for evaluating the critical lateral–torsional moment of CFS omega-shaped profiles. Conversely, the agreement between the ABAQUS, GBTUL, and CUFSM results suggests their utility as reliable tools for estimating the elastic critical lateral–torsional buckling moment. Full article
(This article belongs to the Special Issue Steel Structural Stability in Civil Engineering)
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