Performance evaluation of in-service beam bridge strengthened by prestressed CFRP plates
ZHU Zhenxiang
LI Pengcheng
PANG Xuedong
LI Guangqi
SONG Xiaodong
Abstract：To evaluate the strengthening effect of prestressed carbon fiber reinforced polymer(CFRP)plates on an in-service prestressed concrete continuous hollow slab bridge,the mechanism and effectiveness of prestressed CFRP plate strengthening an in-service prestressed concrete continuous hollow slab bridge are studied using a combination of numerical simulation and load testing.The results indicate that prestressed CFRP plate strengthening can improve the deflection state of the beam after cracking,suppress crack propagation,enhance structural durability,but the effect on increasing the stiffness of the cracked structure itself is very limited,and this strengthening method is not suitable for the stiffness enhancement requirements of cracked beams in normal service conditions.The theoretical research and results can provide a basis for the reinforcement design of similar structures and decision-making for the expansion and reconstruction of highways.
Keywords：prestressed CFRP platebridge reinforcementnumerical simulationload testing
Publication Date：2024-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 84-90 )