摘要
为了探讨劲性钢筋混凝土约束梁的抗剪性能,本文对3根集中荷载作用下的劲性钢筋混凝土约束梁(共6个截面)进行了试验研究,同时采用非线性平面有限元方法对其作了全过程分析,数值分析结果与试验结果吻合良好。根据试验和电算结果,本文分析了劲性钢筋混凝土约束梁的抗剪机理以及影响其抗剪承载力的主要因素。当使用计算剪跨比时,用现有劲性钢筋混凝土简支梁抗剪强度公式计算劲性钢筋混凝土约束梁的抗剪承载力是偏于安全的,因而建议象钢筋混凝土约束梁一样,劲性钢筋混凝土约束梁的抗剪承载力用其相应的简支梁抗剪承载力公式计算,本文建议了具体的计算公式。
In order to probe into the shear resistant behaviors ofsteel reinforced concrete(SRC)restrained beams,three test beams underconcentrated loads have been tested.A full range analysis of the testbeams is conducted by using nonlinear finite element(NLFE)techique,and a good agreement with the experimental results is achieved.Theshear resistant mechanism of SRC restrained beam and the main factorsaffecting its shear strength are analysed.It is found that when theavailable shear strength formula for simply supported SRC beams is usedto calculate the shear strength of SRC restrained beams,the result turnsout to be conservative,so it is suggested that the shear strength of SRCrestrained beam could be calculated by the corresponding formula ofsimply supported SRC beam,adopting calculation shear span ratio.Thepractical formula is proposed in the paper.
关键词
钢筋混凝土
约束梁
抗剪性能
steel reinforced concrete
restrained beam
shear resistant behavior
nonlinear finite element analysis
