Abstract:
Promoting the use of recycled aggregate concrete is an important way to recycle the building solid waste and promote the sustainable development of ecological environment. Fiber reinforced polymer (FRP) is an effective way to improve the mechanical properties of recycled concrete. Domestic and overseas researchers have carried out experimental research on and theoretical analysis of the characteristic of compressive strength, stress-strain curve, mechanical properties and seismic performance of the FRP wrapped recycled concrete materials and structural member with the different design parameters, such as the replacement rate of recycled aggregate, FRP type, lateral confinement stiffness (number of FRP layers), FRP fully wrapped or strip wrapped, etc. The applicability of the ultimate strength and ultimate strain model of FRP confined ordinary concrete to the test results of FRP confined recycled concrete is also compared. This paper analyzes the research status and shortcomings of FRP confined recycled concrete materials and components, and summarizes the problems that need to be further researched, so as to provide references for the subsequent research and engineering application of FRP confined recycled concrete structures.