Stress Transferring Mechanism of a Pressure Tunnel Lining Strengthened with CFRP

Abstract This paper investigates the stress transferring mechanism of a pressure tunnel strengthened with CFRP. A simplified mechanical model internal water transfer from CFRP to lining concrete is established, and key parameters that influence between are identified. solid-spring-solid three-dimensional finite element established. Using numerical model, influences above on ratios borne by investigated. Based results, reinforcement scheme Yellow River Crossing Tunnel studied optimized as case study. reveals elastic modulus thickness two most important factors affect CFRP, increasing can decrease ratio improve state concrete.