In this study, the co-effects of steel fibers and FRP confinement on the concrete behavior under the axial compression load are investigated. Thus, the experimental tests were conducted on 18 steel fiber-reinforced concrete (SFRC) specimens confined by FRP. Moreover, 24 existing experimental test results of FRP-confined specimens tested under axial compression are gathered to compile a reliable database for developing a mathematical model. In the conducted experimental tests, the concrete strength was varied as 26 MPa and 32.5 MPa and the steel fiber content was varied as 0.0%, 1.5%, and 3%. The specimens were confined with one and two layers of glass fiber reinforced polymer (GFRP) sheet. The experimental test results show that simultaneously using the steel fibers and FRP confinement in concrete not only significantly increases the peak strength and ultimate strain of concrete but also solves the issue of sudden failure in the FRP-confined concrete. The simulations confirm that the results of the proposed model are in good agreement with those of experimental tests.

在这项研究中，研究了钢纤维和FRP约束对混凝土在轴向压缩载荷作用下的共同影响。因此，对FRP限制的18个钢纤维混凝土（SFRC）标本进行了实验测试。此外，收集了24个在轴向压缩下测试的FRP约束试样的现​​有实验测试结果，以编译出一个可靠的数据库来开发数学模型。在进行的实验测试中，混凝土强度分别为26 MPa和32.5 MPa，钢纤维含量为0.0％，1.5％和3％。样品被限制在一层和两层玻璃纤维增​​强聚合物（GFRP）板中。实验测试结果表明，在混凝土中同时使用钢纤维和FRP约束不仅显着提高了混凝土的峰值强度和极限应变，而且解决了FRP约束混凝土突然失效的问题。仿真结果表明，所提出模型的结果与实验测试吻合良好。