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(1 国网河南省电力公司经济技术研究院, 郑州 450052;2 中国电力科学研究院有限公司, 北京 100192)
摘要: 共享输电塔依靠抗滑移连接件将通讯设施与电力设施结合,而输电塔在设计之初并未考虑这种方案。 因此,有必要进一步明确挂载对输电塔性能的影响。 为分析不同挂载位置对输电塔整体承载性能的影响,在输电塔中选取子结构,并以挂载位置为变化参数进行了单调拟静力试验。 结果表明:不挂载时,主材的破坏模式为弯扭失稳,在挂载作用下主材破坏模式均呈现为弯曲失稳。 竖向挂载与侧向挂载的联合作用对子结构整体的承载力有所削弱,辅材对主材的支撑作用是不可忽略的。 基于挂载对试件承载力的削弱程度,建议在挂载时使用相邻节间挂载。
关键词: 共享输电塔; 挂载位置; 承载性能; 单调拟静力试验; 抗滑移连接件
中图分类号:TU391 文献标志码:A 文章编号:1002⁃848X(2022)14⁃0065⁃07
DOI:10 19701 / j jzjg LS210139
Experimental study on substructure performance of transmission tower under different mounting positions
LIU Xiangli1, DONG Yuming2, FANG Zhenggang2, LIU Rui2, ZHAO Weibo2
(1 State Grid Henan Economic Research Institute, Zhengzhou 450052, China;2 China Electric Power Research Institute, Beijing 100192, China)
Abstract: The shared transmission tower relies on anti sliding connectors to combine communication facilities with power facilities. However, this scheme was not considered at the beginning of the design of the transmission tower, so it is necessary to study the influence of mounting on the performance of the transmission tower. In order to analyze the influence of different mounting positions on the overall bearing capacity of transmission tower, the substructure was selected in the transmission tower, and the monotonic quasi⁃static test was carried out with the mounting position as the variable parameter. The results show that the failure mode of the main material is bending and torsion instability when it is not attached, and the failure mode of the main material is bending instability when it is attached; the combined action of vertical and lateral loading weakens the overall bearing capacity of the substructure; the supporting effect of auxiliary materials on the main material can not be ignored. Based on the degree of weakening of the bearing capacity of the specimen by the mountings, it is recommended to use adjacent inter⁃sectional mountings in the mountings.
Keywords: shared transmission tower; mounting position; bearing capacity; monotonic quasi⁃static test; antisliding connector
∗国家电网有限公司总部科技项目资助(5217L0190009)。第一作者:刘湘莅,硕士,教授级高级工程师,长期从事输变电工程设计和科技研究工作,Email:liuxiang8588@ sohu. com。通信作者:房正刚,硕士,高级工程师,主要从事输电线路结构及杆塔通用设计研究工作,Email:mexie1204@ 163. com。[引用本文] 刘湘莅,董玉明,房正刚,等. 不同挂载位置下输电塔子结构性能试验研究[ J]. 建筑结构,2022,52(14):65⁃71. LIU Xiangli,DONG Yuming,FANG Zhenggang,et al. Experimental study on substructure performance oftransmission tower under different mounting positions[J]. Building Structure,2022,52(14):65⁃71.