Fatigue behaviour of FRP bars encased in concrete

Fatigue behaviour of FRP bars encased in concrete

Paper in proceedings (conference paper)

The paper describes an experimental programme for studying the fatigue performance of internal GFRP reinforcement, as initiated by the authors. The bars were encased in concrete to allow anchoring of samples, and to provide the concrete environment. The samples were axially loaded at a frequency of 4 Hz under a constant stress ratio of 0.1. Two types of GFRP bars have been used to date: sand-coated bars with an epoxy matrix, and ribbed bars with a vinyl ester matrix. The S-N curve was created for the sand-coated bars throughout its recommended range, i.e. from roughly 1000 cycles to two million cycles. The results obtained from the tests of sand-coated bars encased in concrete are comparable with other presented studies. Thermocouples fixed at the surface of the GFRP bars allowed for the measurement of temperature during loading.

The paper describes an experimental programme for studying the fatigue performance of internal GFRP reinforcement, as initiated by the authors. The bars were encased in concrete to allow anchoring of samples, and to provide the concrete environment. The samples were axially loaded at a frequency of 4 Hz under a constant stress ratio of 0.1. Two types of GFRP bars have been used to date: sand-coated bars with an epoxy matrix, and ribbed bars with a vinyl ester matrix. The S-N curve was created for the sand-coated bars throughout its recommended range, i.e. from roughly 1000 cycles to two million cycles. The results obtained from the tests of sand-coated bars encased in concrete are comparable with other presented studies. Thermocouples fixed at the surface of the GFRP bars allowed for the measurement of temperature during loading.

Composite, Concrete, Cyclic, Fatigue, FRP, Reinforcement

Composite, Concrete, Cyclic, Fatigue, FRP, Reinforcement

JANUŠ, O.; GIRGLE, F.; KOSTIHA, V.; ŠTĚPÁNEK, P.; MANSOUR, M.

2020

29.05.2019

International Federation for Structural Concrete

Krakow

9782940643004

Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures 2019

1968

1976

9

https://www.fib-international.org/publications/fib-proceedings/fib-symposium-in-krakow,-poland-2019-proceedings-detail.html