纵筋率对有腹筋约束梁受剪性能影响的试验研究  

Experimental Study on Effect of Longitudinal Reinforcement Ratio on Shear Behavior of Restrained Beams

作　　者：李立仁[1] 杨定锋[1] 支运芳[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《重庆工学院学报》2007年第9期24-28,共5页Journal of Chongqing Institute of Technology

基　　金：重庆市建设委员会基金资助项目(城科字2004第(25)号)

摘　　要：通过对5根两点集中加载、剪跨比为2.5、上部负筋截断、具有不同单侧纵筋配筋率的有腹筋约束梁进行试验,深入研究了在上部纵筋截断的情况下,有腹筋约束梁的受剪破坏全过程及纵筋配筋率对有腹筋约束梁的裂缝形态、破坏形态、钢筋应变分布的影响,并就纵筋配筋率对有腹筋约束梁受剪承载能力的影响作了探讨.Five restrained beams with web reinforcements and different longitudinal reinforcement are tested under static two-point loading with the shear-span ratio being kept around 2.5. On this basis, the overall process of cracking development under shear, the effect of longitudinal reinforcement ratio on cracking pattern, final mode, strain distribution of rebar, and the effect of longitudinal reinforcement ratio on the ultimate capacity of RC restrained beams with web reinforcements are investigated.

关 键 词：钢筋混凝土 有腹筋约束梁 负筋截断 纵向钢筋配筋翠 

分 类 号：TU318[建筑科学—结构工程]