Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Time-dependent brittle creep-relaxation failure in concrete
In real-world engineering applications, concrete is usually subjected to both creep and stress relaxation. Observations are necessary to understand this coupling process. This paper presents the results of brittle creep-relaxation experiments performed on concrete. Instead of tending to an asymptotic value, the stress in all the test specimens dropped sharply with a rapid increase in the strain before failure, when the boundary displacement was kept constant. The acceleration in the tertiary stage exhibited power-law behaviour, with the exponent - α being - 0·58 ± 0·13 for the stress rate and - 0·56 ± 0·12 for the strain rate. For each specimen, the time-to-failure exhibited power-law dependence on the secondary creep (relaxation) rate, with the exponent being 0·97 ± 0·09 for strain and 0·98 ± 0·09 for stress. These results suggest that it should be possible to predict the time-to-failure of concrete by monitoring its behaviour during the steady and critical stages.
Time-dependent brittle creep-relaxation failure in concrete
In real-world engineering applications, concrete is usually subjected to both creep and stress relaxation. Observations are necessary to understand this coupling process. This paper presents the results of brittle creep-relaxation experiments performed on concrete. Instead of tending to an asymptotic value, the stress in all the test specimens dropped sharply with a rapid increase in the strain before failure, when the boundary displacement was kept constant. The acceleration in the tertiary stage exhibited power-law behaviour, with the exponent - α being - 0·58 ± 0·13 for the stress rate and - 0·56 ± 0·12 for the strain rate. For each specimen, the time-to-failure exhibited power-law dependence on the secondary creep (relaxation) rate, with the exponent being 0·97 ± 0·09 for strain and 0·98 ± 0·09 for stress. These results suggest that it should be possible to predict the time-to-failure of concrete by monitoring its behaviour during the steady and critical stages.
Time-dependent brittle creep-relaxation failure in concrete
Wang, Ying-chong (Autor:in) / Zhang, Bao-Ju / Hao, Sheng-Wang
2016
Aufsatz (Zeitschrift)
Englisch
A grain-based time-to-failure creep model for brittle rocks
| Elsevier | 2019
Time-Dependent Analysis of Concrete Bridges with Creep, Shrinkage and Cable Relaxation
| British Library Conference Proceedings | 2009
TIME-DEPENDENT ANALYSIS OF CONCRETE BRIDGES WITH CREEP, SHRINKAGE AND CABLE RELAXATION
| British Library Conference Proceedings | 2009