To date, the shear contribution of lightweight self-consolidating concrete (LWSCC) members reinforced with basalt fiber-reinforced polymer (BFRP) bars (LWSCC-BFRP) has not yet been investigated. Therefore, the anticorrosion properties of BFRP bars combined with the advantages of LWSCC motivated this research to assess the behavior of such members under shear. Eight beams cast using LWSCC and normal-weight concrete (NWC) reinforced with BFRP or steel bars were prepared and tested up to failure. The specimens had a total length of 3100 mm and concrete cross section of 200 mm in width and 400 mm in depth. The influence of two different types of BFRP bars of comparable quality and commercially available (sand-coated basalt and helically grooved basalt) on shear capacity was assessed. The tested beams included five beams reinforced with BFRP bars, one beam reinforced with steel bars, and two beams constructed using NWC for comparison purposes. The experimental results indicate that the adoption of LWSCC allowed for decreasing the self-weight of the reinforced concrete (RC) beams (density of 1800 kg/m³) compared to NWC. Test results show that the concrete shear capacity of the LWSCC beams increased as did the axial stiffness of the longitudinal BFRP reinforcing bars. The test results were compared with the shear capacities predicted using the provisions in several standards. Using a 0.75 concrete density reduction factor in the CSA 2012 shear equation to consider the influence of concrete density yielded a more accurate value for the concrete shear capacity. In addition, using a 0.8 concrete density reduction factor in the ACI 2015 design equation yielded an appropriate degree of conservatism compared to the NWC beams.

迄今为止，尚未研究过用玄武岩纤维增强聚合物（BFRP）棒（LWSCC-BFRP）增强的轻质自固结混凝土（LWSCC）构件的剪切贡献。因此，BFRP钢筋的抗腐蚀性能与LWSCC的优势相结合，促使本研究评估这种构件在剪切作用下的行为。准备了八根使用LWSCC浇铸的梁和用BFRP或钢筋加固的普通重量混凝土（NWC）并进行了测试，直至失效。样品的总长度为3100毫米，混凝土横截面的宽度为200毫米，深度为400毫米。评估了两种质量相当且市售的BFRP棒材（砂质玄武岩和螺旋槽玄武岩）对剪切能力的影响。测试的梁包括五根用BFRP筋加固的梁，一根用钢筋加固的梁，和两根用NWC建造的梁，用于比较。实验结果表明，采用LWSCC可以降低钢筋混凝土梁的自重（密度为1800 kg / m³）与NWC相比。试验结果表明，LWSCC梁的混凝土抗剪承载力随着纵向BFRP钢筋的轴向刚度的增加而增加。将测试结果与使用几个标准中规定的剪切能力进行了比较。在CSA 2012剪切方程中使用0.75混凝土密度降低系数来考虑混凝土密度的影响，得出的混凝土抗剪承载力的值更准确。此外，与NWC梁相比，在ACI 2015设计公式中使用0.8的混凝土密度降低系数产生了适当的保守度。