Textile reinforced concrete structures under uncertain dynamic loading processes

Concrete constructions with textile reinforcement provide an opportunity of increasing load-bearing capacity of existing structures. New textile technologies permit the effective production of textile surface structures with several layers of filament threads made of glass or carbon. Although this new type of reinforcement applied to strengthening of existing structures is effective, clarification is still required concerning the modified load-bearing behavior and an assessment of structural safety.

This paper is mainly devoted to enhanced computational algorithms to account for the load-bearing reserves of reinforced concrete structures with textile reinforcement under dynamic loading processes.

A multi-reference-plane model (MRM) was developed for the realistic numerical simulation of the load bearing behavior of reinforced concrete structures with textile strengthening [

1

]. The equation of motion is set up with a mass matrix of the MRM-element which was developed to compute damage indicators [

2

]. For the solution of the system of differential equations a modified time step operator (Newmarkt) is applied.

Data uncertainty, e.g. of the material, bond and geometry parameters, has a significant influence at textile strengthened concrete. The equation of motion is transferred to a fuzzy random equation of motion in order to consider of data uncertainty. The Fuzzy stochastic finite element method (FSFEM) is used to take into account the data uncertainty in the numerical simulation.

The developed algorithms was verified at experiments and applied to real construction.