空间足尺组合式连接节点受力性能研究
发布时间：2018-10-18 20:37
【摘要】：以某大型特高压用钢管格构式变电构架工程为背景,对空间足尺组合式连接节点进行空间静力加载试验和有限元分析,着重研究节点的应力应变及位移发展特征、破坏模式和极限承载性能。试验结果表明:设计荷载下,除主管与节点板连接处的端部由于应力集中而出现轻微局部屈服外,节点其他部位仍处于弹性阶段;加载至设计荷载的近190%时,主管受力较大端出现受压"鼓曲",主管与节点板1(JDB1)的连接处严重"凹陷",随即支管(7)的插板与JDB1连接处发生受压"失稳",节点破坏。有限元模型的分析结果,在节点应变发展、荷载-位移曲线、破坏模式、极限承载力等方面均与试验结果吻合较好。该类型节点的构造基本合理,满足设计荷载要求。建立节点承载力的理论分析模型及计算公式,理论计算结果与试验结果、有限元分析结果吻合较好。
[Abstract]:Based on a large ultra-high pressure steel tube latticed transformer frame project, the spatial static loading test and finite element analysis of the space full-scale composite connection are carried out, and the stress strain and displacement development characteristics of the joints are emphatically studied. Failure mode and ultimate bearing capacity. The test results show that the other parts of the joint are still in the elastic stage except for the slight local yield at the end of the joint between the supervisor and the joint due to the stress concentration, and when the design load is nearly 190th, the test results show that the joint is still in the elastic stage under the design load. The "bulging" appeared at the larger end of the supervisor, the joint between the supervisor and the joint plate 1 (JDB1) was seriously "depressed", then the joint of the branch pipe (7) and the JDB1 joint was subjected to compression "instability" and the joint was destroyed. The results of finite element model are in good agreement with the test results in the aspects of joint strain development, load-displacement curve, failure mode, ultimate bearing capacity and so on. The structure of this type of node is basically reasonable and meets the requirements of design load. The theoretical analysis model and calculation formula of the bearing capacity of joints are established. The results of theoretical calculation are in good agreement with the experimental results, and the results of finite element analysis are in good agreement.
【作者单位】： 重庆大学;桂林理工大学;
【基金】：中央高校基本科研业务费专项资金(CDJZR12200010)
【分类号】：TM63
，
本文编号：2280302
[Abstract]:Based on a large ultra-high pressure steel tube latticed transformer frame project, the spatial static loading test and finite element analysis of the space full-scale composite connection are carried out, and the stress strain and displacement development characteristics of the joints are emphatically studied. Failure mode and ultimate bearing capacity. The test results show that the other parts of the joint are still in the elastic stage except for the slight local yield at the end of the joint between the supervisor and the joint due to the stress concentration, and when the design load is nearly 190th, the test results show that the joint is still in the elastic stage under the design load. The "bulging" appeared at the larger end of the supervisor, the joint between the supervisor and the joint plate 1 (JDB1) was seriously "depressed", then the joint of the branch pipe (7) and the JDB1 joint was subjected to compression "instability" and the joint was destroyed. The results of finite element model are in good agreement with the test results in the aspects of joint strain development, load-displacement curve, failure mode, ultimate bearing capacity and so on. The structure of this type of node is basically reasonable and meets the requirements of design load. The theoretical analysis model and calculation formula of the bearing capacity of joints are established. The results of theoretical calculation are in good agreement with the experimental results, and the results of finite element analysis are in good agreement.
【作者单位】： 重庆大学;桂林理工大学;
【基金】：中央高校基本科研业务费专项资金(CDJZR12200010)
【分类号】：TM63
，
本文编号：2280302
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