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.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2011年第5期38-42,共5页
China Railway Science
基金
铁道部科技研究开发计划项目(2010G004-M)
关键词
活性粉末混凝土
T型梁
抗剪承载力
抗剪破坏形态
剪跨比
配筋率
Reactive powder concrete
T-shaped beam
Shear strength
Shear failure pattern
Shear span-depth ratio
Reinforcement ratio
