The prestressed concrete cylinder pipe(PCCP)may fail at each structural layer under internal pressure.Carbon fiber reinforced polymer(CFRP)lining is one of the most commonly used methods for re-pairing PCCPs.However,the failure mechanism of CFRP-lined PCCP under internal pressure remains to be fully understood.The paper presents a multilayer ring model of CFRP-lined PCCP under internal pres-sure.Analytical expressions for the radial displacement,stress and strain of CFRP-lined PCCP were ob-tained.The analytical results were in good agreement with existing experimental results,which verified the accuracy of the model.The parametric study results showed that the bearing capacity of PCCP under inter-nal pressure increased with the increase of steel cylinder thickness and concrete core thickness.In addi-tion,increasing the prestressing level could improve the cracking resistance capacity.The bearing capacity of CFRP-lined PCCP under internal pressure increased with the increase of CFRP thickness.
维普
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