Experimental Study and Numericals Simulation on Bond Performance of Basalt Fiber Reinforced Polymer Bars and Alkali Activated Concrete

Abstract

Abstract: Basalt fiber reinforced polymer bars (BFRP bars) and alkali activated concrete provides a safety guarantee for the durability of concrete in the marine environment. A separate analytical model was proposed to examine the bond slip performance based on a series of pullout experimental tests. Based on the experimental data, the bond slip constitutive model and the plastic damage model of BFRP bars and alkali activated concrete were obtained, and the numerical model based on the nonlinear spring element was constructed. Through the numerical analysis and experimental results, it is concluded that the calculated results of the proposed model matches well with the test results. The test and simulation results show that the specimens with the bond length of 2.5d and 5d (d is the diameter of BFRP bars) all have pull-out failure, while the specimens with the bond length of 10d have splitting failure. The distribution of bond stress between BFRP bars and alkali activated concrete is not uniform. With the increase of bond length and BFRP bars diameter, the ultimate bond strength decreases gradually.When the diameter of BFRP bars is 12 mm and the bond length is 2.5d, 5d and 10d, the ultimate bond strength of alkali activated concrete test block is 13.92 MPa, 13.56 MPa and 12.60 MPa, respectively. Compared with ordinary concrete specimens with the same bond length, the ultimate bond strength increases by 6.58%, 10.97% and 9.76%, respectively.

Key words: basalt fiber reinforced polymer bar, alkali activated concrete, bond performance, bond slip constitutive model, plastic damage model, nonlinear spring element

CLC Number:

TU528

FAN Xiaochun, XU Wei, CHEN Yuancheng, LIANG Tianfu, YIN Yaoxiao. Experimental Study and Numericals Simulation on Bond Performance of Basalt Fiber Reinforced Polymer Bars and Alkali Activated Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1896-1911.

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