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The Experimental Study of Prestressed Carbon Fiber Cloth Strengthening Effect

LI Yongdong;Shanxi Provincial Highway Bureau;Key Laboratory of Bridge Engineering Disaster Prevention and Mitigation in Shanxi;  
Through the prestressed carbon fiber cloth strengthening test beam experiment,the strengthening methods of prestressed concrete old bridge are simulated. During the experiment,the hierarchical loading method is used,which carried out a detailed load test of strain,displacement and crack width of the control section under various loads before and after the test beam reinforcement. The test results show that the prestressed carbon fiber cloth strengthening methods have both the advantages of active and passive reinforcement methods of external prestressed and common carbon fiber cloth. The method can effectively reduce the strain,deflection and crack width of the cracking structure control section,and improve the structural rigidity and durability,prolong the service life of the bridge.
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