385 m超大型长江大跨越输电塔线体系抗震性能分析  

Research on seismic performance of 385 m long-span transmission tower-line system crossing the Yangtze River

作　　者：陈兵 余亮 王章轩 黄士君 舒赣平[3] 罗柯镕 宁帅朋 CHEN Bing;YU Liang;WANG Zhangxuan;HUANG Shijun;SHU Ganping;LUO Kerong;NI Shuaipeng(State Grid Jiangsu Electric Power Company Construction Branch,Nanjing 210011,China;Jiangsu Power Design Institute Co.,Ltd.of CEEC,Nanjing 211102,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]国网江苏省电力有限公司建设分公司,江苏南京210011 [2]中国能源建设集团江苏省电力设计院有限公司,江苏南京211102 [3]东南大学土木工程学院,江苏南京211189

出　　处：《西安建筑科技大学学报（自然科学版）》2022年第4期533-542,共10页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家电网有限公司科技项目资助(SGJSJSOOXMJS2000259)。

摘　　要：以在建的385 m超大型长江大跨越工程为例,基于SAP2000建立了单塔和塔线体系的有限元模型,通过模态分析、静力弹性分析、静力弹塑性分析、动力时程分析分别研究了单塔和塔线耦合体系的抗震性能.研究结果表明:塔线体系跨越塔自振频率小于单塔;跨越塔主材混凝土的灌注高度对结构自振频率、应力比及杆件最不利位置都有影响;地震作用下斜材应力比较大且较早出现塑性铰,是抗震设计中的薄弱位置;一致激励地震作用下,塔线体系位移普遍大于单塔,加速度响应则小于单塔结构,轴力最大增幅在11%左右;非一致激励地震作用下,不同视波速对结构响应有较大影响,应以予考虑.Taking the 385 m super long-span transmission project crossing the Yangtze River under construction as an example,the finite element models of single tower and tower-line system are established based on SAP2000,and the seismic performance of single tower and tower-line coupled system is studied through modal analysis,static elastic analysis,static elastoplastic analysis and dynamic time analysis.The research results show that the natural vibration frequency of crossing tower in transmission tower line system is less than that of single tower.The filling height of the concrete has an effect on the self-vibration frequency,stress ratio and the location of the most unfavorable section of the structure.The stress ratio of the slope bar is relatively large and the plastic hinge appears earlier under the action of earthquake,which is the weak position in the seismic design.Under consistent excitation,the displacement of the tower-line system is generally larger than that of the single tower,the acceleration response is smaller than that of the single tower structure and the maximum increase of the axial force is 11%.Under non-uniform excitation,different apparent wave velocities also have a large impact on the structural response,which should be considered.

关 键 词：大跨越 塔线体系 动力特性 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程] TU311.41