A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Tensile and flexural creep rupture tests on partially-damaged concrete specimens
Abstract Three series of novel tensile and flexural creep tests on partially-damaged concrete specimens were carried out in order to gain some insight into creep crack growth and failure of strain-softening materials. In the tests, each specimen was initially loaded to a given point in the descending branch and thus had a lower load-carrying capacity than that at the peak-point. Then, the specimen was unloaded and reloaded to sustain a load which was from 70% to 95% of its current load-carrying capacity. Experimental creep curves display a three-stage process, consisting of primary, secondary and tertiary stages, with a decreasing, constant and increasing creep rate, respectively. The secondary stage dominates the whole failure lifetime, whereas both the secondary and tertiary stages are important in terms of creep deformation. Failure life-time seems to be more sensitive to the change of load level in flexural tests rather than in tensile tests. The decrease in load-carrying capacity due to damage tends to result in a shorter failure lifetime and a lower critical load level for creep rupture. The descending branch of the static load-deflection or load-CMOD curve may be used as an envelope criterion for creep fracture.
Tensile and flexural creep rupture tests on partially-damaged concrete specimens
Abstract Three series of novel tensile and flexural creep tests on partially-damaged concrete specimens were carried out in order to gain some insight into creep crack growth and failure of strain-softening materials. In the tests, each specimen was initially loaded to a given point in the descending branch and thus had a lower load-carrying capacity than that at the peak-point. Then, the specimen was unloaded and reloaded to sustain a load which was from 70% to 95% of its current load-carrying capacity. Experimental creep curves display a three-stage process, consisting of primary, secondary and tertiary stages, with a decreasing, constant and increasing creep rate, respectively. The secondary stage dominates the whole failure lifetime, whereas both the secondary and tertiary stages are important in terms of creep deformation. Failure life-time seems to be more sensitive to the change of load level in flexural tests rather than in tensile tests. The decrease in load-carrying capacity due to damage tends to result in a shorter failure lifetime and a lower critical load level for creep rupture. The descending branch of the static load-deflection or load-CMOD curve may be used as an envelope criterion for creep fracture.
Tensile and flexural creep rupture tests on partially-damaged concrete specimens
Carpinteri, A. (author) / Valente, S. (author) / Zhou, F. P. (author) / Ferrara, G. (author) / Melchiorri, G. (author)
1997
Article (Journal)
English
TENSILE AND FLEXURAL CREEP RUPTURE TESTS ON PARTIALLY-DAMAGED CONCRETE SPECIMENS
| Online Contents | 1997
Tensile and flexural creep rupture tests on partially-damaged concrete specimens
| Springer Verlag | 1997
Tensile and Flexural Creep Rupture Tests on Partially-Damaged Concrete Specimens
| British Library Online Contents | 1997
Flexural Tensile Strength of Partially Grouted Concrete Masonry
| British Library Online Contents | 1992
Creep rupture and tensile tests on glass-reinforced laminates
| TIBKAT | 1969