高强钢筋活性粉末混凝土梁的抗剪承载力试验

在对称集中荷载作用下,对8根高强钢筋活性粉末混凝土矩形截面简支梁进行抗剪试验,研究剪跨比、配箍率、纵筋配筋率对试验梁抗剪承载力的影响规律.结果表明:高强钢筋活性粉末混凝土构件的破坏形态与普通钢筋混凝土构件相似,高强钢筋和活性粉末混凝土具有较好的协同工作能力;在无腹筋情况下,随剪跨比的提高,梁抗剪承载力随纵筋率的增大抗剪承载力略有提高,但变形能力降低;采用GB 50010-2010《混凝土结构设计规范》计算高强钢筋活性粉末混凝土梁的抗剪承载力值比实验值小,说明规范计算结果偏于保守,建议采用适用于纤维高强钢筋活性粉末混凝土的抗剪计算公式,使理论计算结果和实测值更接近.

Experimental Study on Shear Capacity of High Strength Reinforced Reactive Powder Concrete Beam

In order to study the influence of shear span ratio, stirrup ratio and longitudinal reinforcement ratio on the shear capacity, 8 rectangular simple beams of high strength reinforced reactive powder concrete(HSRRPC)were investigated. The results show that damage form of HSRRPC beams is similar to normal reinforced concrete beams, the co-work between high strength steel and reactive powder concrete is benign; for the beam without stirrups, with the increase of shear span ratio, shear capacity reduces; with the increase of longitudinal reinforcement ratio,the shear capacity improves slightly, but deformation capacity reduces. The calculation value of HSRRPC shear capacity by GB 50010-2010 Concrete Structure Design Code is less than the experimental one, which shows that the code calculation is conservative. The shear capacity calculation formula of HSRRPC is proposed, which makes the theoretical calculation result more close to the experimental value.