Flexural behavior of a novel high-strength RCFST column-to-column connection

Mou, Ben; Li, Yingze; Wang, Fangying; Pan, Wei; Zhao, Yong

Abstract

Brittle fracture is one of the principal disincentives to limit the use of ultrahigh-strength steels in tall buildings. This paper proposes a novel column-to-column connection without full penetration welding in reinforced concrete-filled steel tubular composite columns. The paper describes an experimental investigation into the flexural behavior of the proposed RCFST column-to-column connection, in which the steel was manufactured using ultrahigh-strength steel grades H-SA700 and USD 685. Four specimens with varying configurations of reinforcing steel bars (separated type or gathered type) and column shapes (square or circular) were tested under four-point bending to evaluate the failure modes, flexural capacity, and deformation capacity. The results show that the gathered type of configuration of reinforcing steel bars can effectively improve the flexural capacities while having a negligible effect on the strain distribution of steel tubes or steel bars. Besides, the column type was found to significantly influence the strain distribution of the steel tube. The design formulae show accuracy and reliability and could be applied to assess the yield and ultimate strength of the proposed new connections.

Citation

Mou, B., Li, Y., Wang, F., Pan, W., & Zhao, Y. (2021). Flexural behavior of a novel high-strength RCFST column-to-column connection. Thin-Walled Structures, 159, Article 107274. https://doi.org/10.1016/j.tws.2020.107274

• Journal Article Type: Article
• Acceptance Date: Nov 4, 2020
• Online Publication Date: Dec 9, 2020
• Publication Date: Feb 1, 2021
• Deposit Date: Oct 25, 2021
• Publicly Available Date: Dec 10, 2021
• Journal: Thin-Walled Structures
• Print ISSN: 0263-8231
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 159
• Article Number: 107274
• DOI: https://doi.org/10.1016/j.tws.2020.107274
• Keywords: Mechanical Engineering; Building and Construction; Civil and Structural Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/6537358
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0263823120311423?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Flexural behavior of a novel high-strength RCFST column-to-column connection; Journal Title: Thin-Walled Structures; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.tws.2020.107274; Content Type: article; Copyright: © 2021 Elsevier Ltd. All rights reserved.