Abstract
The basis of correct numerical simulations is the knowledge of the material behavior under uniaxial compressive and tensile loading. In particular, the behavior under tensile stresses is of importance for steel fiber reinforced concrete due to its post cracking tensile strength.This paper presents an algorithm to determine the centric tensile stress-crack-width relationship of steel fiber reinforced concrete.The input data is a load-crack-width curve obtained from flexural tensile tests.Within the context of an inverse analysis, the tensile behavior is determined using B-Splines, which allow for high approximation quality due to the variable combination of the number of control points and the polynomial degree. Based on the results obtained from inverse analysis, numerical simulations of deflection-softening and -hardening notched 3-point flexural tensile tests on steel fiber reinforced concretes are carried out, the results of which are compared against the experimental results.With the obtained constitutive relationship, a very good agreement between simulated and experimentally observed concrete structural behavior is shown.
| Translated title of the contribution | Derivation of the centric tensile stress-crack width relationship of steel fiber reinforced concrete from flexural tensile tests using B-Splines |
|---|---|
| Original language | German |
| Pages | 451-460 |
| Number of pages | 10 |
| Volume | 94 |
| No | 11 |
| Specialist publication | Bauingenieur |
| State | Published - 2019 |