Transfer of shear stresses at steel‐concrete interface: Experimental tests and literature review. Issue 1 (18th January 2019)

• Record Type: Journal Article
• Authors: Chrzanowski, Maciej; Odenbreit, Christoph; Obiala, Renata; Bogdan, Teodora; Degée, Hervé
• Is Part Of: Steel construction. Volume 12:Issue 1(2019)
• Page Start: 44
• Page End: 54
• Publication Date: 2019-01-18
• Subjects: steel‐concrete composite columns -- composite action -- longitudinal shear -- steel‐concrete bond -- shear stresses between plain steel and concrete surfaces -- assessment of steel‐concrete bond strength -- analysis of steel‐concrete bond behaviour; Composite construction -- Tests -- Fasteners; Verbundbau -- Versuche -- Verbindungs‐ und Befestigungsmittel; Building, Iron and steel -- Design and construction -- Periodicals; Steel, Structural -- Periodicals; Iron and steel bridges -- Design and construction -- Periodicals; Structural steel industry -- Europe -- Periodicals; 721.044714205
• DOI: 10.1002/stco.201800024
• Languages: English
• ISSNs: 1867-0520

Abstract

Abstract: Shear stresses can be transferred via bond at the steel‐concrete interface without having to consider any mechanical shear connectors. The research conducted shows that the use of anti‐adhesive products, such as grease, reduce the bond at the steel‐concrete interface in push‐out tests (POTs). However, the effect is still significant, especially for fully encased steel profiles. The results of an experimental POT campaign with nine small‐scale cube specimens and two composite column specimens are presented here. Three different surface conditions were examined: a) an untreated surface, b) a surface treated with anti‐adhesive agent (formwork release oil) and c) a surface treated with PTFE spray. The resulting ultimate shear stresses were compared with the experimental results available in the literature [1–10]. How the different geometries of the specimens, the concrete age and the surface treatment conditions influence the bond strength are compared and summarized.