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ORIGINAL RESEARCH article

Front. Mater.
Sec. Structural Materials
Volume 11 - 2024 | doi: 10.3389/fmats.2024.1435059
This article is part of the Research Topic FRP Composites for Civil Engineering: Strengthening and New Constructions View all 4 articles

Numerically efficient analysis of FRP confined CFST members under lateral low-velocity impact loading

Provisionally accepted
Jikai Tang Jikai Tang 1*Bin Liu Bin Liu 2*Lijing Kang Lijing Kang 3*Wei Fan Wei Fan 4*Debo Zhao Debo Zhao 5Tao Wang Tao Wang 3*Liang He Liang He 1*Jing Xie Jing Xie 1*
  • 1 Other, Nanning, China
  • 2 Hualan Design & Consulting Group, Nanning, China
  • 3 School of Civil Engineering and Architecture, Guangxi Minzu University, Nanning, China
  • 4 Key Laboratory for Wind and Bridge Engineering of Hunan Province, College of Civil Engineering, Hunan University, Changsha, China
  • 5 Key Laboratory of Coastal Urban Resilient Infrastructures (MOE), Shenzhen University, Shenzhen, China

The final, formatted version of the article will be published soon.

    Fiber-reinforced polymer (FRP) confined concrete filled steel tube (CFST) structures effectively harness the advantages of FRP materials, improving the performance of CFST structures and overcoming durability issues of steel tubes. Three-dimensional detailed finite element (FE) models are usually employed to estimate the impact-resistant performance of FRP confined CFST members under impact loadings. However, detailed FE models are typically complex in modeling and low in calculation efficiency as well as require high performance in computer hardware. Hence, this paper aims to develop an alternative modeling method that can predict the impact behavior of FRP confined CFST members with high efficiency and low requirements in computer resources. The proposed method includes a contact model using mass-spring-damper elements to describe the contact behavior between the impactor and the impacted FRP confined CFST members and a nonlinear fiber-based beam-column element model to simulate the behavior of FRP-confined CFST members under impact loading. The accuracies of fiber-section beam-column elements are carefully examined for FRP confined CFST members based on quasi-static test data reported in the literature.It is found that the fiber-based elements considering confinement effects provided by FRP and steel tubes can accurately predict the force-deformation relationship of the FRP confined CFST members under monotonic loading. By incorporating the strain-rate effects of concrete, steel, and FRP materials, the validated fiber-section elements are employed to simulate eight impact tests on FRP confined CFST members. Good agreements are observed between the results obtained from the proposed models and the experimental data. The computational efficiency of the developed model is three orders of magnitude faster than that of the conventional detailed FE model.

    Keywords: Fiber-reinforced polymer, Concrete filled steel tube, FRP confined CFST structures, Efficicent modeling, Low-velocity impact

    Received: 19 May 2024; Accepted: 26 Jul 2024.

    Copyright: © 2024 Tang, Liu, Kang, Fan, Zhao, Wang, He and Xie. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Jikai Tang, Other, Nanning, China
    Bin Liu, Hualan Design & Consulting Group, Nanning, China
    Lijing Kang, School of Civil Engineering and Architecture, Guangxi Minzu University, Nanning, China
    Wei Fan, Key Laboratory for Wind and Bridge Engineering of Hunan Province, College of Civil Engineering, Hunan University, Changsha, China
    Tao Wang, School of Civil Engineering and Architecture, Guangxi Minzu University, Nanning, China
    Liang He, Other, Nanning, China
    Jing Xie, Other, Nanning, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.