Areas of interest

  • Steel and steel-concrete composite structures
  • Structural stability
  • Thin-walled beams
  • Generalised Beam Theory
  • Geometrically exact beam theories


  • 2019 Vinnakota award (Structural Stability Research Council), for the paper "Local buckling of RHS members with small-to-large corner radii subject to combinations of axial force and biaxial bending”, authored by the student L. Vieira (recipient of the award) and his supervisors, Rodrigo Gonçalves and Dinar Camotim.
  • First place of the 2017 McGuire Award for Junior Researchers Medal Competition, awarded by the Structural Stability Research Council (SSRC), for contributions to structural stability research after obtaining the PhD degree.
  • Honorable Mention of the 2016 McGuire Award for Junior Researchers Medal Competition, awarded by the Structural Stability Research Council (SSRC).
  • First place in the 2013 Ferry Borges competition category A (best paper published in 2010-12, in the field of Structural Engineering), for the paper “A large displacement and finite rotation thin-walled beam formulation including cross-section deformation”, published in Computer Methods in Applied Mechanics and Engineering in 2010. Awarded by the Portuguese Association of Structural Engineering (APEE), LNEC and the Portuguese Order of Engineers.
  • Honorable Mention of the 2013 Ferry Borges competition category A, for the paper “A geometrically exact approach to lateral-torsional buckling of thin-walled beams with deformable cross-section”, published in Computers & Structures in 2012.
  • Honorable Mention of the 2012 Vinnakota award (Structural Stability Research Council), for the paper "GBT-Based assessment of the buckling behavior of cold-formed steel purlins restrained by sheeting”, authored by the student A. Graça (recipient of the award), C. Basaglia and the supervisors of the recipient, Dinar Camotim and Rodrigo Gonçalves.


Link to Scopus Author Details


Cross-section stress calculator including bi-axial shear, bi-moment and bi-shear (programmed by Tomás Silveira)

Collapse analysis of an L-frame using geometrically exact beam finite elements

The pre- and post-collapse behaviour of the frame is accurately calculated using geometrically exact beam elements with warping transmission. Residual stresses and member imperfections are taken into consideration. (more details in the 2009 Steel and Steel-Concrete Composite Construction Conference paper).

Lateral-torsional buckling of a channel cantilever beam

The cantilever is subjected to a tip load at the flange/web junction. Only eight geometrically exact beam finite elements were employed, which allow for cross-section warping, distortion and plate-like bending. This visualization shows several deformed configurations, each associated with a different load level. A comparison with the results obtained with MITC shell finite elements (not shown) demonstrates that the proposed beam finite element leads to extremely accurate results for large displacements and finite rotations combined with severe cross-section distortion. (more details in the CMAME paper in 2010).

Extension of a helical beam

The helical beam is modelled using 16 equal length cubic curved geometrically exact Kirchhoff beam elements. (taken from the Master thesis of David Manta, 2015)

Torsional buckling of regular convex polygonal tubes

Regular polygonal tubes have double eigenmodes. The torsional buckling mode corresponds to a helix in the 2D eigenmode space. This fact can only be observed through GBT-based analyses. (more details in the TWS paper in 2013)

Steel-concrete composite bridge

Top: first GBT cross-section deformation modes: (1) axial extension, (2) major axis bending, (3) minor axis bending, (4) torsion, (5) distortion, (6-7) diaphragm induced symmetric and anti-symmetric distortion.

Right: deformed configurations (x1E5) of a simply supported bridge without/with diaphragms at mid-span, subjected to an eccentric 1 kN force (only half of the bridge is shown). The GBT results were obtained with 3 beam finite elements.

(more details in the SCS paper in 2010)