Elastic and inelastic analyses of composite cellular beams in hogging moment regions. (March 2023)

• Record Type: Journal Article
• Authors: de Oliveira, Vinicius Moura; de Carvalho, Adriano Silva; Rossi, Alexandre; Ferreira, Felipe Piana Vendramell; Martins, Carlos Humberto
• Is Part Of: Thin-walled structures. Volume 184(2023)
• Publication Date: 2023-03
• Subjects: Composite cellular beams -- Hogging moment regions -- Finite element analysis -- Lateral distortional buckling -- Local buckling modes; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2022.110513
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: The present paper aims to assess the elastic and inelastic behavior of steel–concrete​ composite cellular beams in hogging moment regions. The finite element model is developed via ABAQUS software. In the parametric study, the unrestrained length, I-section dimensions, loading conditions, and the key parameters of the cellular beams are varied. The elastic results are compared with analytical procedures. From the elastic analysis, it was possible to observe interactions between lateral distortional and local buckling modes. The web-post buckling was observed in the finite element models with short unrestrained length since it was under considerable shear force. The flange width, flange thickness, web depth, and web thickness were the parameters that had the greatest influence on the elastic critical load. Some analytical procedures, such as AS 4100:1998, provided non-conservative results for the beams with lower I-section global slenderness and subjected to gradient hogging moment. Highlights: The elastic behavior of steel–concrete composite cellular beams was assessed. The critical load and buckling mode of 360 finite element models were investigated. The comparison between the elastic and inelastic behavior was discussed. The calculation of elastic critical moment provided results against safety.