Reliability Analysis of Pre-stressed Concrete Continuous Girders Bridge using Incremental Launching Method on Chinese code and AASHTO LRFD

Abstract

The object of this paper analyzes the reliability level of pre-stressed concrete continuous girder bridges designed with the Chinese code (JTG D62-2004) and AASHTO LRFD (2007) using incremental launching method at construction stage. Typical cross-sections used in the example bridge are considered at construction stage. Load and resistance parameters are treated as random variables. The statistical parameters are based on the available literature, test data and survey results. Reliability indices are calculated by iterations using the first-order second-moment method. The calculated results indicate that the reliability indices on of JTG D62-2004 are larger that of AASHTO LRFD, which could provide the references for the bridges on the incremental launching construction in overseas construction and competition.