摘要
通过6根高强钢筋活性粉末混凝土简支梁的抗剪试验,得到了不同因素对梁的破坏形态、抗剪承载力及其剪切延性的影响规律。研究表明:剪跨比、配箍率和纵筋率是影响高强钢筋活性粉末混凝土简支梁抗剪性能的主要因素,其中剪跨比影响最大;在适宜的剪跨比条件下,随着纵筋率的提高,无腹筋梁的承载力与斜裂缝倾角增大,剪切延性降低,但有腹筋梁的斜裂缝倾角变化不太明显;提高配箍率不仅可以增强梁的抗剪承载力,而且能够有效改善其剪切延性。
By the shear experiment of 6 high strength reinforced reactive powder concrete beams, we analyzed the factors influencing the beam's damage pattern, shear capacity and shear ductility. The research shows that the shear span ratio, stirrup ratio and longitudinal reinforcement ratio are the key factors of high strength reinforced reactive powder concrete beams, among them the shear span ratio has the most significant influence; with the increase of longitudinal reinforcement ratio, the capacity and inclined crack angle of beams without stirrups increase, and the shear capacity decreases, but the inclined crack angle of beams with stirrups does not change obviously under the condition of suitable shear span ratio; improving the longitudinal reinforcement ratio can not only enhance the shear bearing capacity of the beam, but also effectively improve the shear ductility.
出处
《工程力学》
EI
CSCD
北大核心
2015年第S1期209-214 225,225,共7页
Engineering Mechanics
基金
国家自然科学基金项目(51368013)
广西重点实验室项目(11-CX-04)
关键词
高强钢筋
活性粉末混凝土
简支梁
受剪承载力
剪切延性
high strength steel
reactive powder concrete
simply supported beam
shear beaming capacity
shear ductility
