Paper number 756


Paulo B. Cachim1, Joaquim A. Figueiras2, and Paulo A.A. Pereira3

1Departamento de Engenharia Civil, Universidade de Aveiro
Campus de Santiago, 3810 AVEIRO, Portugal
2Faculdade de Engenharia, Universidade do Porto
Rua dos Bragas, 4099 PORTO CODEX, Portugal
3Departamento de Engenharia Civil, Universidade do Minho
Campus de Azurém, 4800 GUIMARÃES, Portugal

Summary A numerical model, based on the viscoplasticity theory, for the analysis of steel fiber reinforced concrete in compression is presented. The modeling of the fatigue phenomenon involves the study of a large number of cycles. Thereafter, since the modeling of the complete stress-deformation behavior is very time consuming and not suitable for the current purposes, only the increase in plastic deformation after a cycle is considered. In the current model the load is kept at a constant level and the constitutive model describes the evolution of the deformations during the cyclic load process. A serie of experimental fatigue compressive tests in steel fiber reinforced concrete has been carried out to assess the model performance.
Keywords steel fibers, fiber-reinforced concrete, viscoplasticity, compressive fatigue, fatigue modeling, concrete fatigue model.

Theme : Industrial Applications ; Civil Engineering and Building Applications

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