孔洞长度对混凝土大孔梁弦杆剪力分配的影响分析

Analysis of Influence of Opening Length on Shear Distribution of Reinforced Concrete Beams with Openings

根据经典的腹部开矩形大孔的混凝土开孔梁抗剪性能试验,采用有限元ABAQUS对其进行建模分析。在验证该模型可靠性的基础上,对加载过程中混凝土开孔段上下弦杆的剪力分配问题进行了深入探讨。结果表明:随孔长增大,上下弦杆之间的剪力占比差距呈非线性逐渐减小,由55.21%降至15.18%。

Using the software ABAQUS,the finite element models of classical shear test of reinforced concrete beams with rectangular large openings is built.After verifying the reliability of this model,the shear distribution of the upper and lower chord around the web opening is discussed.The results show that with the increase of opening length,the ratio difference of shear force in the upper and lower chords decreases from 55.21%to 15.18%.