ПЕРСПЕКТИВЫ ПРИМЕНЕНИЯ НЕМЕТАЛЛИЧЕСКОЙ КОМПОЗИТНОЙ АРМАТУРЫ В КАЧЕСТВЕ РАБОЧЕЙ НЕНАПРЯГАЕМОЙ В СЖАТЫХ ЭЛЕМЕНТАХ

Abstract

In the foreign countries there exist not only design guidelines but also standards for testing of FRP materials. These codes do not recommend using FRP bars in compressive members, such as columns. But the compressive strength shouldn’t be neglected according to those design codes. In our country the standards for FRP testing and design codes are just in the process of development. This paper contains the analysis results of the possibility of GFRP bars use as the main longitudinal reinforcement in compressive members. The most recent research data on this subject is presented. The studies show that the strength of the specimens grow rapidly with the decreasing tie spacing in columns. We can also make a conclusion that the GFRP bars contribution is only 5 % lower than the contribution of traditional steel bars. Some other research data shows that in case of the tie spacing close to the design codes limitations there is no strength increase in the same specimens made of plain concrete.