A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Self-stressed Concrete Members Reinforced with FRP Bars
Abstract In the two last decades application of FRP bars in building industry has developed intensively due to its advantages, especially, in structures that are exposed to the influence of the aggressive environment and other special conditions. However, in spite of high tensile strength to density ratio and corrosion resistance, the main problems for the use of FRP bars as a structural reinforcement are connected with development of exceeding deflections as well as crack opening under service loads. One of the most effective methods to enhance its performance is pretensioning of the FRP bars. Physico-chemical prestressing with self-stressing concrete can be used to pretension FRP bars; moreover, this prestressing method allows to achieve an effective initial volumetrical stress-strain state in the structural member. Thus, for the design of self-stressed structural members, an analytical model for initial self-stressing state estimation should be developed. The paper presents results of theoretical and experimental investigations of the self-stressed concrete members reinforced with FRP bars. An analytical model for early-age restrained strains and self-stresses estimation was proposed and verified for the non-symmetrical case of cross-sectional reinforcement arrangement. The effectiveness of the physico-chemical prestress was validated by testing structural members under static load. Experimental studies have shown a good agreement of the test and predicted results.
Self-stressed Concrete Members Reinforced with FRP Bars
Abstract In the two last decades application of FRP bars in building industry has developed intensively due to its advantages, especially, in structures that are exposed to the influence of the aggressive environment and other special conditions. However, in spite of high tensile strength to density ratio and corrosion resistance, the main problems for the use of FRP bars as a structural reinforcement are connected with development of exceeding deflections as well as crack opening under service loads. One of the most effective methods to enhance its performance is pretensioning of the FRP bars. Physico-chemical prestressing with self-stressing concrete can be used to pretension FRP bars; moreover, this prestressing method allows to achieve an effective initial volumetrical stress-strain state in the structural member. Thus, for the design of self-stressed structural members, an analytical model for initial self-stressing state estimation should be developed. The paper presents results of theoretical and experimental investigations of the self-stressed concrete members reinforced with FRP bars. An analytical model for early-age restrained strains and self-stresses estimation was proposed and verified for the non-symmetrical case of cross-sectional reinforcement arrangement. The effectiveness of the physico-chemical prestress was validated by testing structural members under static load. Experimental studies have shown a good agreement of the test and predicted results.
Self-stressed Concrete Members Reinforced with FRP Bars
Tur, Victar (author) / Herrador, Manuel F. (author) / Semianiuk, Volha (author)
2017-08-06
8 pages
Article/Chapter (Book)
Electronic Resource
English
FRP Reinforcing Bars in Reinforced Concrete Members
| Online Contents | 1993
Design of Concrete Members Reinforced with GFRP Bars
| British Library Conference Proceedings | 1997
Minimum thickness of concrete members reinforced with fibre reinforced polymer bars
| Online Contents | 2001
Bond Performance of Concrete Members Reinforced with FRP Bars
| British Library Conference Proceedings | 1993
Minimum thickness of concrete members reinforced with fibre reinforced polymer bars
| British Library Online Contents | 2001