Comparative deformability of compressive members reinforced with steel and GFRP reinforcement

Pavel Deminov,A Volkov,Andrey Lapshinov,A Adamtsevich,A Pustovgar

doi:10.1051/matecconf/201825102036

Pavel Deminov, A Volkov + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/201825102036

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Abstract

The paper contains the results of testing of compressive members reinforced longitudinally and transversally with steel and GFRP reinforcement. The spacing of transverse reinforcement (stirrups) and longitudinal reinforcement ratio varied in the specimens. The stress-strain, stress-Poisson’s ration, stress-volumetric strain relationships for tested specimens are given. It was observed that the appearance of cracks occurred with loading 90% of total. By the results of testing investigated that with the decreasing of spacing of transverse reinforcement the strength of specimens increased. Conclusion is made that by using small spacing of transverse reinforcement transverse strains and Poisson’s ratio decreasing, while modulus of elasticity increasing.

Highlights

Despite the release in Russia of GOST for fiber-reinforced polymer (FRP) reinforcement with the compression test method [5] and the official design codes for structures with FRP reinforcement (Appendix L to SP 63.13330.2012 and SP 295.1325800.2017) [6,7] the question of design compressed elements still remains open
As it was presented in articles [9,10,12] and design codes [8,11] for today there is a need for further research of FRP reinforcement in compressed elements
Some studies have shown the prospect of use FRP reinforcement in compressed concrete reinforced elements with frequent spacing of transverse reinforcement

Summary

Introduction

Despite the release in Russia of GOST for fiber-reinforced polymer (FRP) reinforcement with the compression test method [5] and the official design codes for structures with FRP reinforcement (Appendix L to SP 63.13330.2012 and SP 295.1325800.2017) [6,7] the question of design compressed elements still remains open. As shown in studies [9,10], composite reinforcement can be effectively used in centrally compressed elements. As it was presented in articles [9,10,12] and design codes [8,11] for today there is a need for further research of FRP reinforcement in compressed elements. The behavior of FRP reinforcement in reinforced concrete structures is being studied [1,3]. Some studies have shown the prospect of use FRP reinforcement in compressed concrete reinforced elements with frequent spacing of transverse reinforcement. Withal some other studies are underway to optimization the design of traditional compressed elements under different load combinations

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Conclusion