Flexural behavior and modelling of FRP-bar reinforced seawater sea sand concrete beams exposed to subtropical coastal environment

作者：Ren, Fengming; Liu, Tianyao; Chen, Guangming; Xie, Pan; Xiong, Ming-Xiang^*; Yuan, Tian; Chen, Yulu; Guo, Shaozu

来源：CONSTRUCTION AND BUILDING MATERIALS, 2021, 309: 125071.

DOI：10.1016/j.conbuildmat.2021.125071

• FRP Bar
• Seawater sea sand
• Subtropical coastal environment
• Flexural
• Design
• Finite element model

This paper presents long-term flexural behavior of FRP-bar reinforced concrete beams exposed to subtropical coastal environment. Four-point bending tests were conducted and the effects of exposure duration, concrete type, and FRP-bar type were investigated. The load-deflection response of such beams features a nonlinear hardening following the linear ascending. Generally, their ultimate load-carrying capacity was reduced with the increasing exposure duration and further reduced when the seawater and sea sands were used, the BFRP-bar reinforced beams produced higher capacity than the GFRP-bar reinforced ones. For a design-oriented purpose, current American and Chinese codes were modified to determine their load-carrying and deformation capacities at both ultimate and serviceability limit states; for an analysis-oriented purpose, the finite element model has been established and justified to capture their failure modes and stress-strain response.

• 单位
  华南农业大学; 广州大学