Abstract

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Title:: Experiment and Analysis of Bond-anchorage Properties Between BFRC and Steel Bars

Author(s):: WANG Jun; GUO Da-peng; MA Yue; School of Civil Engineering, Northeast Forestry University

Keywords:: basalt fiber reinforced concrete; bond anchorage property; slip; bond strength; constitutive relation of bond stress and slip

Abstract:: In order to study the bondanchorage properties between basalt fiber reinforced concrete (BFRC) and steel bars, the loading end, the free end slip and strain of steel bars under various loads were acquired. Bond stressslip curves and bond stress curves along anchorage length were obtained through 18 center pullout specimens and 9 beam specimens loading experiment. The experiment results show that basalt fiber has an adverse impact on the bondanchorage properties between steel bars and concrete and reduces the ultimate bond strength. 25 mm basalt fiber shows greater ultimate bond strength between concrete and steel bars than 15 mm basalt fiber. The bondanchorage properties between BFRC and steel bars will be improved with the increase of the concrete strength. Relative thickness of concrete cover has little effect on bondanchorage properties. Strain curves of anchor steel bars are concave as a whole and decrease gradually along anchorage length. The bond stress curves along anchorage length are multimodal. The constitutive relation of bond stress and slip between BFRC and steel bars on the basis of experiment data can provide reference for the theory and engineering design of BFRC.