1.河北大学建筑工程学院,河北 保定 071002
2.河北省土木工程监测与评估技术创新中心,河北 保定 071002
赵仰康(1996—),男,硕士研究生。主要从事输电塔结构抗震研究。E-mail:zykhit@163.com
宋鹏彦(1982—),女,讲师,硕导,博士。主要从事结构工程、结构可靠度研究。E-mail:songpengyan@sina.com
收稿:2021-11-11,
修回:2021-11-22,
纸质出版:2022-12-28
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赵仰康,王晨,宋鹏彦.横隔数目对猫头型输电塔抗震性能的影响[J].防灾减灾工程学报,2022,42(06):1287-1293.
ZHAO Yangkang,WANG Chen,SONG Pengyan.Effect of the Number of Cross‑sections on Seismic Response of Catenary‑type Transmission Tower Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(06):1287-1293.
赵仰康,王晨,宋鹏彦.横隔数目对猫头型输电塔抗震性能的影响[J].防灾减灾工程学报,2022,42(06):1287-1293. DOI: 10.13409/j.cnki.jdpme.20211111070.
ZHAO Yangkang,WANG Chen,SONG Pengyan.Effect of the Number of Cross‑sections on Seismic Response of Catenary‑type Transmission Tower Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(06):1287-1293. DOI: 10.13409/j.cnki.jdpme.20211111070.
输电塔是输电线路中的重要支撑结构。为了探究横隔数目对输电塔结构非线性地震响应的影响,以某一实际单回路直线塔中的猫头型输电塔为研究对象。基于OpenSees平台建立4个横隔数目不同的输电塔三维有限元模型,考虑材料和几何非线性,分析猫头型输电塔的动力特性。选取20条远场地震动记录,利用非线性有限元动力分析技术,研究不同横隔数目对输电塔结构远场地震作用下的响应问题。结果表明:随着横隔数目的增加,输电塔的自振周期减小,在一定程度上增加了其抗侧刚度。在大震、巨震作用下,横隔数目的增加,输电塔结构的顶点位移减小,基底剪力增大,层间位移的影响非常小且结构的变形始终在我国现行规范范围内,未超过其限值。
Transmission towers are important elements in transmission lines. In order to investigate the effect of the number of cross-sections on the nonlinear seismic response of transmission tower structures, an actual catenary-type transmission tower is considered. With the help of the OpenSees software, four three-dimensional finite element models of transmission tower structures with different numbers of cross-sections are established, considering the nonlinearity of material and geometry. To consider the influence of input ground motions, 20 far-field ground motions are selected to investigate the response characteristics of different numbers of cross-sections on the transmission tower structure. The results show that as the number of cross-sections increases,the predominant period of the transmission tower decreases and lateral-stiffness of the transmission tower increases in a way. Under the effect of large and giant earthquakes, the maximum displacement of the transmission tower structure decreases whereas the base shear force increases with increasing number of cross-sections. However, the effect on the inter-story displacement is not evident and the deformation of the structure does not exceed the limit value recommended in the current seismic code.
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