摘要
在较为成熟的钢筋混凝土破坏模型——Nielsen模型基础上,根据von Mises屈服准则引入了钢筋的销栓作用,建立起钢筋均匀分布的混凝土构件在拉、压、弯、剪、扭复合作用下的破坏统一模型,并推导出箱形截面下的破坏统一表达式。该模型由于考虑了钢筋销栓作用,使得计算结果更为接近实际情况。针对钢筋混凝土箱形截面的抗剪承载力,将该模型的理论计算结果与原Nielsen模型、国内外规范计算方法和综合应力合成简化法(Simplified Method for Combined Stress-Resultants,SMCS)的抗剪承载力进行比较,验证了该模型有更好的精度。
Based on the existing reinforced concrete unified failure model——Nielsen model and von Mises failure criterion,a unified failure model on reinforced concrete members with distributed reinforcements under the combined forces of tension,compression,bending,shear and torsion was formed by introducing the dowel action of reinforcements.The unified failure expressions of box section members were derived according to the new model.The advantage of this model is to consider the dowel actions of the reinforcements,which makes the calculation results more close to the practical situations.The theoretical results of shear capacity were compared with Nielsen model,the calculation results in several design codes of concrete structures,and also with the Simplified Method for Combined Stress-Resultants（SMCS）,which has verified better accuracy of the present new model.
出处
《四川建筑科学研究》
北大核心
2011年第1期1-6,共6页
Sichuan Building Science
基金
国家自然科学基金资助项目(50378054)
国家重点基础研究发展规划(973)项目(2002CB412709)
关键词
钢筋混凝土
销栓作用
屈服准则
箱形截面
reinforced concrete
dowel action
failure criterion
box section
