Experimental analysis of longitudinal shear between the web and flanges of T-beams made of fibre-reinforced concrete. (1st October 2019)

• Record Type: Journal Article
• Authors: Pereiro-Barceló, Javier; López-Juárez, José Antonio; Ivorra, Salvador; Bonet, José L.
• Is Part Of: Engineering structures. Volume 196(2019)
• Publication Date: 2019-10-01
• Subjects: Longitudinal shear strength -- Longitudinal shear cracking load -- Web-flange junctions -- Fibre-reinforced concrete -- T-beams; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2019.109280
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: 13 T-beams were tested to study the longitudinal shear strength of web-flange junctions. The inclusion of steel fibres improves longitudinal shear strength. Effective width depends on transversal reinforcement and steel fibre content. A procedure was developed to calculate longitudinal shear cracking load. Maximum web-flange longitudinal shear and bending moment situations may not match. Abstract: The longitudinal shear between the web and flanges of T-beams is an Ultimate Limit State contemplated by technical codes. For this reason, the longitudinal shear must be compared with the longitudinal shear resistance of the flange. Longitudinal shear strength can be increased by including steel fibres in the concrete mass. This article shows the experimental results of 13 T-beams mounted on two supports subjected to two central loads. Four of these beams were made with conventional concrete and nine with fibre-reinforced concrete. The direct instrumentation results are discussed and the failure process is described. Longitudinal shear cracking load is studied on the basis of both a theoretical approach and experimental results. An analysis is performed to evaluate each specimen's longitudinal shear, not only in the ultimate state, but also throughout the loading process evolution, based on load and strain records. This process involves determining each beam's effective width. The experimental data confirm an increase in longitudinal shear strength caused by adding steel fibres to concrete.