Safety aspects reexamination of existing reinforced concrete bridge structures

Abstract:

With the demand of a reliable infrastructure and the related question to the condition of the 'old' structures in infrastructure, a new fast method is developed to get answers on this hot question. In the past the model is setup with a 1D line model, later on with 2D elements in a 2D or 3D global structure geometry. Today a solid model of a structure can be setup in a very easy way with the actual FE packages. Integration of the stresses over one or both directions in a 3D solid model give reinforcement moments or forces for even surface or line results, which can be compared with the results of a simple surface or line model from the past. Today it is possible to control the condition of the concrete structure by a socalled sequential static analysis in an acceptable elapse time of 10-20 minutes, instead of days. Now, the crack behaviour of the concrete is treated by a secant calculation process (reduced modulus of Elasticity) to avoid typical nonlinear problems. All other material aspects are treated in a nonlinear way. Safety aspects related to the reexamination of existing structures can be treated in a very fast way.

Año de publicación:

2010

Keywords:

• Sensitivity aspects safety
• Sequential analysis
• Existing bridges

Fuente:

scopus