Experimental investigation on shear-bending performances of concrete-filled thin-walled corrugated steel tubes. (1st January 2023)

• Record Type: Journal Article
• Authors: Fang, Yong; Yang, Hua; Lu, Bo; Wang, Yuyin; Dong, Jucan
• Is Part Of: Engineering structures. Volume 274(2023)
• Publication Date: 2023-01-01
• Subjects: Corrugated steel tube -- Concrete-filled corrugated steel tube -- Combined shear-bending load -- Shear strength -- Bending strength -- Bearing capacity interaction relationship; 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.2022.115147
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Shear-bending tests conducted on 21 CFCSTs and 6 TRCs. Detailed discussions on failure modes, deformation curves, and load versus mid-span displacement responses. Analysis on strain/stress properties of CST and shear-bending working mechanism of CFCST. Design methods proposed for combined shear-bending bearing capacity interaction relationships of CFCST. Abstract: Concrete-filled galvanized corrugated steel tube (CFCST), is an innovative composite member, which is proposed for improving the ductility and durability of conventional reinforced concrete (RC) structures. In practice, combined shear-bending loads often exist in a CFCST pier/column. It is necessary to investigate the shear-bending working mechanism of CFCST and access the shear-bending bearing capacity interaction relationships for a more reasonable design. Twenty-seven columns including 21 CFCSTs and 6 TRC specimens are therefore tested comparably. The main test variables are the loading types, shear span-to-depth ratios, tube forms, and the end/support conditions. The test results show that a satisfactory deformative coordination among the core concrete, reinforcements, and CST can be obtained, resulting in a significant improvement in shear-bending performances compared with conventional RC structures. With the discussion of failure modes, deformation curves, load versus mid-span displacement responses, and strain/stress properties of CST, the shear-bending working mechanism of CFCST is particularly addressed. Based on the test results, reasonable design methods for predicting the individual shear/bending strength and the combined shear-bending bearing capacity interaction relationships of CFCST are proposed eventually.