Experimental investigation on composite beams under combined negative bending and torsional moments

Weiwei Lin*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
72 Downloads (Pure)

Abstract

In this study, straight composite steel-concrete beams were tested to investigate their mechanical performance under combined negative bending and torsional moments. Two specimens were used in this study, and different ratios between the applied negative bending and torsional moments were induced. Load and deflection relationships, strain development on the steel main girder and shear connectors (stud), and the slip development on the steel-concrete interface were recorded in the test and reported in this paper. The results indicate that increase of torsional moment will result in the significant decrease of the load-carrying capacities (e.g. yield load and ultimate load) of the specimens. It was also found that the normal strains of stud shear connectors in such beams are very large and non-negligible compared to their shear strains. In addition, the maximum interface slip was found occurring at around the 1/4 span, and the support conditions and serious crack of the concrete were considered to be the main causes. The research results obtained in this study can provide references for the design and analysis of steel-concrete composite beams subjected to the combined negative bending and torsional moments.

Original languageEnglish
Pages (from-to)1456-1465
Number of pages10
JournalADVANCES IN STRUCTURAL ENGINEERING
Volume24
Issue number7
Early online date18 Dec 2020
DOIs
Publication statusPublished - May 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • experimental study
  • negative bending
  • shear connector
  • steel-concrete composite beam
  • torsional moment

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