DEFLECTION OF PRESTRESSED CONCRETE BRIDGE GIRDERS MADE WITH HIGH PERFORMANCE CONCRETE

摘要

The recent use of High Performance Concrete, HPC in fabrication and construction of prestressed girder bridges allows engineers to design economical bridges with longer span lengths , shallower girders and increased girder spacing. This paper discusses the time dependent deflection of concrete bridges using the proposed refined method, PCI multipliers, and the modified WSDOT multipliers. The proposed refined method and multipliers are based on the WSDOT creep equation for estimating time-dependent deflections of composite and non-composite girders using both conventional and high performance concrete.