活性粉末混凝土T形梁抗剪试验研究

摘要

通过改变模型试验梁的剪跨比、配箍率和纵筋配筋率,对12根钢筋活性粉末混凝土(RPC)T形试验梁进行试验,研究活性粉末混凝土T形梁抗剪承载力和破坏形态及主要影响因素.结果表明:与普通混凝土梁相比,活性粉末混凝土T形试验梁具有较高的抗剪承载力和变形能力；剪跨比在1～4范围内时,试验梁的破坏形态表现为斜压和剪压破坏,且与普通混凝土梁的破坏形态有着明显差异；剪跨比、配箍率和纵筋配筋率对试验梁的抗剪承载力影响显著,抗剪承载力随着剪跨比的增大而减小,随配箍率的提高而提高,随纵筋配筋率的增大而增大.%Experiments of 12 reinforced reactive powder concrete (RPC) T-shaped test beams with different shear span-depth ratios, stirrup ratios and longitudinal reinforcement ratios were carried out. The shear strengths, failure patterns and their main influencing factors of reinforced RPC T-shaped beams were investigated. The experimental results indicate that T-shaped RPC test beams possess higher shear strength and better deformation capacity compared with normal concrete beams. When shear span-depth ratios are in the range from 1 to 4, the failure patterns of test beams represent to be diagonal compression failure and shear compression failure, which are quite different from the failure patterns of normal concrete beam. The shear span-depth ratios, stirrup ratios and longitudinal reinforcement ratios have great effect on the shear strength of test beams. The shear strength declines with the increase of the shear span-depth ratio and enhances with the increase of stirrup ratio and longitudinal reinforcement ratio.