原木-混凝土组合梁螺钉连接件受剪承载力有限元分析

发布时间：2018-04-29 09:00

本文选题：原木-混凝土组合梁 + 螺钉连接件　；参考：《建筑结构学报》2015年S1期

【摘要】：应用ABAQUS有限元分析软件对原木-混凝土组合梁螺钉连接件进行三维实体有限元分析,模型考虑了材料非线性、木梁和混凝土翼板之间的相对滑移,对原木-混凝土组合梁螺钉推出件单调加载下的受剪性能进行分析。结果表明:有限元分析结果与现有试验结果吻合较好。对于原木-混凝土组合梁,螺钉在受弯破坏模式下,螺钉连接件的受剪承载力随螺钉直径、螺钉抗拉强度、螺钉嵌入木材深度的增加而提高,但受螺钉排布方式和混凝土强度影响较小。研究发现,增大螺钉直径对提高螺钉连接件受剪承载力最为有效。在有限元分析的基础上,结合试验数据,提出单个螺钉受剪承载力计算时应考虑螺钉直径、螺钉嵌入木材深度、螺钉抗拉强度和木材强度的影响。
[Abstract]:The finite element analysis software of ABAQUS finite element analysis is applied to the three-dimensional finite element analysis of the bolt concrete composite beam screw connector. The model takes into account the material nonlinearity, the relative slip between the wooden beam and the concrete wing plate, and analyses the shear behavior under the monotonic loading of the screw bolt of the log concrete composite beam. The results show that the finite element is a finite element. The results of the analysis are in good agreement with the existing test results. For the log concrete composite beams, the shear bearing capacity of the screws is increased with the diameter of the screw, the tensile strength of the screw and the depth of the screw embedded in the wood, but the screw arrangement and the strength of the concrete are less affected by the screw in the bending failure mode. The diameter is the most effective to improve the shear bearing capacity of the screw connector. On the basis of the finite element analysis, combined with the test data, it is suggested that the diameter of the screw, the depth of the screw embedded in the wood, the tensile strength of the screw and the wood strength should be considered when the shear capacity of the single screw is calculated.

【作者单位】：南京工业大学土木工程学院;
【基金】：国家自然科学基金项目(51478220)
【分类号】：TU398.9

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