空间复杂多支管柱节点受力性能研究

发布时间：2018-08-30 16:59

【摘要】：对钢管塔架中空间多支管柱节点进行了足尺模型试验,试验装置采用自平衡框架,共制作了2个试验试件.在试验结果的基础上,建立了非线性有限元模型,所得结果与试验结果相比,二者吻合良好,表明有限元模型的合理性,并进行了有限元参数分析.结果表明,试验模型节点主要发生主管压曲的变形破坏,且未出现支管和焊缝的破坏;加载至设计荷载值时,节点所有测点基本处于线弹性状态,表明节点设计较安全.主管径厚比对节点极限承载力影响显著,主管直径较大时,承载力随主管壁厚增大而上升较快;主管直径较小时,承载力随主管壁厚增大而上升较慢.受压支管直径及壁厚较小时,易发生自身弯曲失稳破坏.
[Abstract]:A full-scale model test was carried out on the spatial multi-branch tubular column joints in the steel pipe tower. The self-balanced frame was used in the test device and two test specimens were made. Based on the experimental results, a nonlinear finite element model is established. The results are in good agreement with the experimental results, indicating the rationality of the finite element model and the finite element parameter analysis. The results show that the deformation and failure of the in-charge buckling are mainly occurred in the test model joints, and there is no failure of the branch pipe and the weld seam, and when loaded to the design load value, all the measured points of the joints are basically in a linear elastic state, which indicates that the design of the joints is more safe. The ratio of diameter to thickness has a significant effect on the ultimate bearing capacity of joints. When the diameter of the joint is larger, the bearing capacity increases more quickly with the increase of the wall thickness of the head, and when the diameter of the head is small, the bearing capacity increases more slowly with the increase of the wall thickness of the head. When the diameter and wall thickness of the compressed branch pipe are small, the buckling failure occurs easily.
【作者单位】：重庆大学土木工程学院;重庆文理学院建筑工程学院;山地城镇建设与新技术教育部重点实验室(重庆大学);
【基金】：国家自然科学基金资助项目(51278511,51508054) 重庆市科委基础与前沿研究计划项目(CSTC2014JCYJA30019)~~
【分类号】：TU392.3

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