Nonlinear Numerical Assessment of Steel Reduced Beam Section Connections

Dan V. Bompa, Teodora Bogdan, Ahmed Y. Elghazouli, Edurne Nuñez, Matthew R. Eatherthon, Roberto T. Leon

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Cyclic tests on Reduced Beam Section (RBS) connections made of heavy structural sections provided detailed insight into the structural behaviour, including strength, ductility, and failure modes of such configurations. The experimental results indicated that geometrical and material effects need to be carefully considered when designing welded RBS connections incorporating large steel profiles. To better interpret the experimental results, nonlinear finite element simulations are conducted for the test series, comprising four large-scale specimens with distinct sizes. It is shown that the numerical models can reproduce the overall moment-rotation curves, inelastic distribution, as well as failure modes. The findings point out the need, in relatively large sections with thick flanges, for a deeper RBS cut than currently specified in design guidance. This modification would be required to promote a response governed by extensive yielding at the RBS while reducing the excessive strain demands at the beam-column welds.

Original languageEnglish
Title of host publicationProceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022
EditorsFederico M. Mazzolani, Dan Dubina, Aurel Stratan
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages9
ISBN (Print)9783031038105
Publication statusPublished - May 2022
Event10th International Conference on the Behaviour of Steel Structures in Seismic Areas, STESSA 2022 - Timisoara, Romania
Duration: 25 May 202227 May 2022

Publication series

NameLecture Notes in Civil Engineering
Volume262 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565


Conference10th International Conference on the Behaviour of Steel Structures in Seismic Areas, STESSA 2022


  • Jumbo profiles
  • Non-linear modelling
  • Reduced beam sections
  • Seismic design
  • Steel connections

ASJC Scopus subject areas

  • Civil and Structural Engineering


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