Toufik BELAID

@usthb.dz

Faculty of Civil Engineering
University of Sciences and Technology Houari Boumediene

Toufik BELAID


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Toufik BELAID obtained his civil engineering degree in 2005 from the University of Science and Technology -Houari Boumediene (USTHB) - Algiers/Algeria. He obtained his Magister in Construction in 2009 focusing on the behaviour and stability design of steel beams. In the same university, he obtained his doctorate in 2019, he is currently a Teacher of steel structure design at the Faculty of Civil Engineering and Head of Research in the Built Environment Research laboratory (LBE) at USTHB

RESEARCH, TEACHING, or OTHER INTERESTS

Civil and Structural Engineering, Building and Construction, Civil and Structural Engineering
8

Scopus Publications

84

Scholar Citations

4

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • Analytical study of the effects of the critical moment and brace rigidity on the lateral–torsional buckling of beams with discrete braces
    Toufik Belaid, Adel Slimani, Dalila Boukhalfa, Fatiha Ammari
    Steel Construction, 2026
    This study develops a simplified analytical formulation for evaluating the minimum rigidity of discrete braces in relation to the lateral–torsional buckling of steel beams. The main contribution lies in deriving closed‐form expressions that incorporate key dimensionless parameters, offering a practical alternative to fully numerical approaches. The formulation is validated against finite element simulations performed with LTBeamN, demonstrating good agreement. The analysis is carried out under the assumptions of linear elastic behaviour, idealised support and bracing conditions, and doubly symmetric I‐sections, while residual stresses, imperfections and plasticity are not considered. Within these boundaries, the results provide valuable guidance for both the design and assessment of brace rigidity in steel structures.
  • Comparative Design of an Industrial Building: Cold Formed Steel versus Hot Rolled Steel
    Idriss Rouaz, Haytham Bouzid, Toufik Belaid, Mounir Ait Belkacem
    Electronic Journal of Structural Engineering, 2024
    Industrial buildings made of Cold Formed Steel (CFS) members have gained an extent of construction all over the world. It has become an alternative process of construction to the Hot Rolled Steel (HRS) elements, allowing it to respond to the requirements in a short time. The aim of this work is to present a technical and economical comparative study of an industrial building case made of CFS versus HRS elements and designed according to the European and American codes. Relying on numerical modeling, the design according to Eurocode 3 demonstrates that the industrial building made of CFS is more economical compared to the HRS members building by 43% in terms of weight and 28% in terms of cost. In addition, based on the Average Capacity Design (ACD) ratio of the CFS elements, it turns out that the design according to Eurocode 3 part 1-3 is less conservative than the same building designed according to the American Iron and Steel Institute (AISI) code. Moreover, the American code privileges the safety aspect of the designed CFS building with the ASD method over the LRFD and LSD methods. Otherwise, the CFS building designed according to Eurocode 3 part 1-3 with truss columns and beams reveals a weight saving of 25% and 14%, respectively, compared to the building with a full web of beams and columns, and the building with a full web of columns and steel trusses.
  • Analytical model for buckling length coefficient determination in steel trusses: A lateral torsional buckling approach
    Dalila Boukhalfa, Toufik Belaid, Adel Slimani, Fatiha AMMARI
    International Journal for Computational Civil and Structural Engineering, 2024
    This paper presents a contribution to the study of the stability of steel trusses. The paper proposes an analytical model for the determination of the buckling length coefficient of the truss N by the lateral torsional buckling approach. The model is derived by considering the equilibrium of the truss under the action of the applied loads and the buckling load. The buckling load is determined by considering the lateral buckling of the equivalent beam and the interaction between the members. The model is validated by comparing the predicted buckling loads with the experimental results of several steel trusses. The results show that the model can predict the buckling loads with good accuracy. The proposed model is a valuable tool for the design of steel trusses. The model can be used to determine the buckling length coefficient of the truss and to ensure that the truss is safe and reliable.
  • The effective length factor of columns in steel framed buildings with end restraint effects
    Adel Slimani, Toufik Belaid, Messaoud Saidani, Fatiha Ammari, Redouane Adman
    Structures, 2023
  • A new method for determining the effective length factor of columns in partially braced frames on elastic supports
    Structural Engineering and Mechanics, 2023
  • Formulation of the critical lateral buckling moment of steel beams under asymmetric loadings
    Toufik Belaid, Adel Slimani, Fatiha Ammari, Dalila Boukhalfa, Redouane Adman
    Thin Walled Structures, 2023
  • Mechanical Modeling and General Analytical Solution for the Dynamic Buckling of Plane Structures Using a Beam-Column Element with Varying End Restraints
    Aissam Beldjazia, Redouane Adman, Adel Slimani, Messaoud Saidani, Toufik Belaid, et al.
    International Journal of Structural Stability and Dynamics, 2022
    The stability of structures is an important aspect that the designer must pay particular attention to in order to ensure safety against collapse. This investigation is concerned with analytical and numerical analyses of the dynamic buckling of plane structures. A rigorous mechanical model is proposed, consisting of a beam-column element with nodal ends possessing two rotational springs of rigidities acting in parallel with the bending stiffness of the beam-column. The model is first analyzed with respect to the dynamic behavior by investigating the influence of the variation in the stiffness of the nodal springs on the fundamental frequency of the proposed mechanical model. Compression axial loading is applied to the beam-column in order to study the nonlinear dynamic behavior by introducing buckling. This novel approach is used to highlight the interaction between the fundamental frequency and the critical buckling load. Simple examples are treated using the approach and the results are compared with those obtained from a global analysis. The results revealed that it is possible to reproduce the stability analysis of a global structure by simply analyzing a target element, taking into account all elements adjacent to it with less than 1% error on the results.
  • Influence of load position on critical lateral torsional buckling moment of laterally restrained beam at tense flange
    T. Belaid, F. Ammari, R. Adman
    Asian Journal of Civil Engineering, 2018

RECENT SCHOLAR PUBLICATIONS

  • Comparative Design of an Industrial Building: Cold Formed Steel versus Hot Rolled Steel
    I Rouaz, H Bouzid, T Belaid, M Ait Belkacem
    Electronic Journal of Structural Engineering 24 (2), 43-48 , 2024
    2024.0
    Citations: 3
  • Analytical model for buckling length coefficient determination in steel trusses: A lateral torsional buckling approach
    D Boukhalfa, T Belaid, A Slimani, F Ammari
    International Journal for Computational Civil and Structural Engineering … , 2024
    2024.0
    Citations: 1
  • The effective length factor of columns in steel framed buildings with end restraint effects
    A Slimani, T Belaid, M Saidani, F Ammari, R Adman
    Structures 58, 105521 , 2023
    2023.0
    Citations: 4
  • A new method for determining the effective length factor of columns in partially braced frames on elastic supports
    A Slimani, T Belaid, M Saidani, F Ammari, R Adman
    Structural Engineering and Mechanics 85 (6), 825-835 , 2023
    2023.0
    Citations: 15
  • Formulation of the critical lateral buckling moment of steel beams under asymmetric loadings
    T Belaid, A Slimani, F Ammari, D Boukhalfa, R Adman
    Thin-Walled Structures 182, 110163 , 2023
    2023.0
    Citations: 19
  • Mechanical modeling and general analytical solution for the dynamic buckling of plane structures using a beam-column element with varying end restraints
    A Beldjazia, R Adman, A Slimani, M Saidani, T Belaid, F Ammari
    International Journal of Structural Stability and Dynamics 22 (02), 2250019 , 2022
    2022.0
    Citations: 19
  • Effet de la rigidité du maintien latéral sur le Déversement des Poutres en I
    T Belaid, A Slimani, F Ammari, D Boukhalfa, R Adman
    Congrès des Jeunes Chercheurs en Mécanique (Méca-J) , 2021
    2021.0
  • Modélisation théorique et numérique pour l'étude du déversement élastique des éléments métalliques avec maintien latéral au niveau d'une semelle
    T Belaid
    2019.0
    Citations: 1
  • Influence of load position on critical lateral torsional buckling moment of laterally restrained beam at tense flange
    T Belaid, F Ammari, R Adman
    Asian Journal of Civil Engineering 19 (7), 839-848 , 2018
    2018.0
    Citations: 21
  • Stabilité au déversement des treillis en « N » sous charge uniformément répartie
    T Belaid, F Ammari, R Adman, D Boukhalfa
    2ème Conférence Internationale de Construction Métallique et Mixte CICOMM … , 2018
    2018.0
  • Etude de la stabilité latérale des éléments en acier à section mono symétrique-cas des profils en U
    T Belaid
    Alger , 2009
    2009.0
    Citations: 1
  • Analytical study of the effects of the critical moment and brace rigidity on the lateral–torsional buckling of beams with discrete braces
    T Belaid, A Slimani, D Boukhalfa, F Ammari
    Steel Construction , 0
  • Modélisation théorique et numérique pour du déversement élastique des éléments métalliques avec maintien latéral au niveau d'une semelle.
    T BELAID
    Université des Sciences et de la Technologie d'Alger, Houari Boumediène , 0

MOST CITED SCHOLAR PUBLICATIONS

  • Influence of load position on critical lateral torsional buckling moment of laterally restrained beam at tense flange
    T Belaid, F Ammari, R Adman
    Asian Journal of Civil Engineering 19 (7), 839-848 , 2018
    2018.0
    Citations: 21
  • Formulation of the critical lateral buckling moment of steel beams under asymmetric loadings
    T Belaid, A Slimani, F Ammari, D Boukhalfa, R Adman
    Thin-Walled Structures 182, 110163 , 2023
    2023.0
    Citations: 19
  • Mechanical modeling and general analytical solution for the dynamic buckling of plane structures using a beam-column element with varying end restraints
    A Beldjazia, R Adman, A Slimani, M Saidani, T Belaid, F Ammari
    International Journal of Structural Stability and Dynamics 22 (02), 2250019 , 2022
    2022.0
    Citations: 19
  • A new method for determining the effective length factor of columns in partially braced frames on elastic supports
    A Slimani, T Belaid, M Saidani, F Ammari, R Adman
    Structural Engineering and Mechanics 85 (6), 825-835 , 2023
    2023.0
    Citations: 15
  • The effective length factor of columns in steel framed buildings with end restraint effects
    A Slimani, T Belaid, M Saidani, F Ammari, R Adman
    Structures 58, 105521 , 2023
    2023.0
    Citations: 4
  • Comparative Design of an Industrial Building: Cold Formed Steel versus Hot Rolled Steel
    I Rouaz, H Bouzid, T Belaid, M Ait Belkacem
    Electronic Journal of Structural Engineering 24 (2), 43-48 , 2024
    2024.0
    Citations: 3
  • Analytical model for buckling length coefficient determination in steel trusses: A lateral torsional buckling approach
    D Boukhalfa, T Belaid, A Slimani, F Ammari
    International Journal for Computational Civil and Structural Engineering … , 2024
    2024.0
    Citations: 1
  • Modélisation théorique et numérique pour l'étude du déversement élastique des éléments métalliques avec maintien latéral au niveau d'une semelle
    T Belaid
    2019.0
    Citations: 1
  • Etude de la stabilité latérale des éléments en acier à section mono symétrique-cas des profils en U
    T Belaid
    Alger , 2009
    2009.0
    Citations: 1
  • Effet de la rigidité du maintien latéral sur le Déversement des Poutres en I
    T Belaid, A Slimani, F Ammari, D Boukhalfa, R Adman
    Congrès des Jeunes Chercheurs en Mécanique (Méca-J) , 2021
    2021.0
  • Stabilité au déversement des treillis en « N » sous charge uniformément répartie
    T Belaid, F Ammari, R Adman, D Boukhalfa
    2ème Conférence Internationale de Construction Métallique et Mixte CICOMM … , 2018
    2018.0
  • Analytical study of the effects of the critical moment and brace rigidity on the lateral–torsional buckling of beams with discrete braces
    T Belaid, A Slimani, D Boukhalfa, F Ammari
    Steel Construction , 0
  • Modélisation théorique et numérique pour du déversement élastique des éléments métalliques avec maintien latéral au niveau d'une semelle.
    T BELAID
    Université des Sciences et de la Technologie d'Alger, Houari Boumediène , 0