摘要
为分析大跨越输电塔结构单塔和塔线体系两种模型的合理性,采用时程分析法系统地分析了输电单塔和塔线体系的地震响应,从节点最大位移、结构的最大扭转角和杆件的最大轴力等方面分析了两种结构体系的地震响应的差异。结果表明,单塔和塔线体系节点最大位移的大小与节点所处的位置有关;塔线体系中塔的扭转角随地震传播时间的增加较单塔扭转角平缓;由于导线的存在,使得两者塔柱底部和刚度突变处腹杆的轴力差异较大。
To find the rationality of the two kinds model of signle tower and tower-line system, the seismic response of long crossing transmission tower and tower-line system were systematically studied by time-history analysis method, and were differentiated in terms of maximum joint displacement, torsion and axial force in main leg and web member. By comparison, the maximum joint displacement of the single tower and tower-line system are related to the joint loca- tion. The torsion of tower-line system becomes much gentler than that of the single tower with the increase of seismic travel time. Due to the transmission line, the axial force in the tower leg bottom and the web member subject to sud- den stiffness change varies greatly between tower-line system and single tower.
出处
《华东电力》
北大核心
2011年第5期742-746,共5页
East China Electric Power
关键词
单塔
塔线体系
地震响应
时程分析
single tower
tower-line system
seismic response
time-history analysis
