BOND BEHAVIOR BETWEEN BFRP BARS AND BASALT FIBER REINFORCED RECYCLED AGGREGATE CONCRETE

Abstract

Abstract: To study the bond properties between BFRP bars and basalt fiber recycled concrete, the center pull-out test with 42 specimens was performed. The influence of the replacement ratio of recycled coarse aggregate, the diameter and the surface characteristics of the BFRP bars were studied. The results indicate that with the increase of the replacement ratio of recycled aggregate, the bond stress of peak value decreases gradually, and the peak slip decreases firstly and then increases. With the increase of the diameter of BFRP, the bond stress increases gradually, and the peak value of bond stress is gradually increased, the peak slip value corresponding to the peak bond stress is gradually increased. But the overall change range is very small. The surface condition of the BFRP bar has greatly influence on the bond behavior of the basalt fiber recycled concrete and the BFRP bar. Using the improved BPE model, CMR model, and the continuous curve model of the calculated value and the experimental value of the comparative analysis of the ultimate bond stress, the bond-slip constitutive relation model is obtained by nonlinear regression analysis, and the calculated values of the model are in good agreement with the experimental results.

Key words: bond behavior, analysis model, the test of center pull-out, the diameter of basalt fiber reinforced polymer bars, the replacement ratio of recycled aggregate

CLC Number:

TB332

YIN Tian-tian, LIU Hua-xin, KONG Xiang-qing, WANG Xue-zhi. BOND BEHAVIOR BETWEEN BFRP BARS AND BASALT FIBER REINFORCED RECYCLED AGGREGATE CONCRETE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(6): 68-74.

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