Longterm behaviour of cantilever concrete bridges

Abstract:

Cantilever bridges, constructed in the Netherlands, are mostly designed for the main river crossings. A lot of them are constructed in the period of 1960-1975. Material time dependency modelling was rather time consuming and computer simulations of these phenomena were poor available yet. The longterm behaviour of these bridges was simulated in those days in the framework of the fib ModelCode1978. Later on the ModelCode1990 was extended till a load dependency of the phenomena creep. However a lot of computer programs did not include these load dependency related to creep. It was easier to add a so-called time dependant factor to the original creep formulation coming from the fib ModelCode78. Modifications to the fib ModelCode1990 (and properly also the fib ModelCode2010) will lead to better deformation pbkp_redictions which will be shown in this paper.

Año de publicación:

2012

Keywords:

• Cantilever bridges
• concrete
• FEA
• Shrinkage
• Creep

Fuente:

scopus