MECHANICAL BEHAVIOR OF BFRP REBARS AT HIGH TEMPERATURES
The mechanical properties (strength and modulus) of basalt fiber reinforced polymer (BFRP) rebars for reinforcement in concrete structures were investigated at a range of different temperatures (20～300℃). BFRP rebars impregnated with vinyl ester resin of 8 mm diameter and 1000 mm length were used in this study. The results show that the failure of BFRP rebar remained a brittle state from 20℃ up to 300℃, and the stress-strain relationships of BFRP rebar were nearly linear until failure. In addition, at elevated temperatures, the tensile strength of BFRP rebar retained a high level, at the same time, the elastic modulus had little loss. And at 300℃, the average tensile strength and nominal elastic modulus of BFRP rebar were 831.81 MPa and 23300 MPa, which were 87％ and 97％ of the ones at room temperature, respectively. Meanwhile, when the temperature cooled from 300℃ to room temperature after heating, the strength of BFRP rebar could also returned the level of 95.7％ at room temperature. In comparison with the existing GFRP, CFRP, AFRP and Steel bars, BFRP rebars showed an excellent performance at high temperature, which was comparable to steel bars.
BFRP rebar high temperature properties mechanical testing
Sheng-Hu Cao Zhi-Shen Wu
Department of Urban & Civil Engineering, Ibaraki University, Nakanarusawa 4-12-1, Hitachi 316-8511, Department of Urban & Civil Engineering, Ibaraki University,Nakanarusawa 4-12-1, Hitachi 316-8511, J
国际会议
广州
英文
133-138
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）