Bearing Capacity of CFRP-Lined PCCP Under Internal Pressure
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.
万方数据
维普
