City Research Online

Flexural behavior of steel fiber-reinforced coal gangue aggregate concrete beams

Cai, B., Li, K. & Fu, F. ORCID: 0000-0002-9176-8159 (2023). Flexural behavior of steel fiber-reinforced coal gangue aggregate concrete beams. Structures, 52, pp. 131-145. doi: 10.1016/j.istruc.2023.03.172

Abstract

The flexural behavior of steel fiber-reinforced coal gangue aggregate concrete (SFCGC) and steel fiber-reinforced ordinary concrete (SFOC) beams were investigated in this study. 11 specimens were tested using four-point bending tests to investigate the effect of coal gangue replacement rate (CGRR) (0%, 50%, 100%), steel fiber volume content (SFVC) (0%, 0.5%, 1%, 1.5%), rebar ratio (0.6%, 1.17%, 1.94%), and beam height (200mm, 300mm) on the beam flexural performance. The failure modes, flexural capacities, flexural stiffness, ductility, and energy dissipation coefficient of the specimens were analyzed. In addition, the stress-strain curve of SFCGC was obtained by axial compressive tests in this study. A equations for the stress-strain relationship of SFCGC beams were obtained by data fitting. a finite element model (FEM) of SFCGC beams was established in ABAQUS. A self-programmed Python script was used to create the steel fiber model in FEM of an SFCGC beam, in which steel fibers were distributed randomly and discretely to investigate the strengthening effect of steel fibers on SFCGC beams. Finally, a comparative analysis shows good agreement in the load-deflection curves and transverse strain obtained from simulations using the established FE model and tests.

Publication Type: Article
Additional Information: © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords: Coal gangue; Steel fiber; Flexural performance; Load-deflection curve; Finite element; ABAQUS
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
[img] Text - Accepted Version
This document is not freely accessible until 5 April 2024 due to copyright restrictions.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

To request a copy, please use the button below.

Request a copy

Export

Downloads

Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login