Live Load Distribution in a Slab-on-Girder Bridge Subjected to Corrosion and Differential Settlement
Jun Wang and Yail J. Kim
Appears on pages(s):
corrosion; fiber reinforced polymer (FRP); live load distribution factor; settlement
This paper presents the structural performance of bridge decks reinforced with steel and glass fiber-reinforced polymer (GFRP) bars subjected to corrosion and differential settlement. The superstructure system of the bridge comprises a deck slab and prestressed concrete girders, which is modeled using a finite element program. In compliance with the American Association of State Highway Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications (BDS), live loads are applied and the implications of various load combinations are examined. Emphasis is placed on determining stress distributions and corresponding live load distribution factors when subjected to the external distress. The calculated load distribution factors are compared against those obtained from AASHTO LRFD BDS. The stress levels and load distributions in the steel- and GFRP-reinforced concrete decks are found to be similar.