常见干字型输电塔地震易损性分析
Seismic Fragility Analysis of common Gan-type Transmission Tower
陈刚 1王郁 2李茂峰 1刘波 1陈强 1唐勇 1岑关 1李小军 2荣棉水2
作者信息
- 1. 中国南方电网有限责任公司超高压输电公司百色局,广西 百色 533000
- 2. 北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124
- 折叠
摘要
为了研究输电塔-线体系中输电塔破坏的问题,根据某实际输电塔进行有限元建模,基于分析结果确定并定义损伤状态极限,选择 20 条地震动记录进行调幅,使用增量动力分析方法,以输电塔主材和斜材的杆件节间相对位移角为地震需求参数,地震动峰值加速度为强度参数,通过IDA分析方法得到输电塔的易损性曲线,对输电塔进行震害分析.通过体系中输电塔的易损性曲线可以与输电塔单塔的易损性曲线进行对比,得到塔-线体系耦连对输电塔的影响.
Abstract
In order to study the problem of transmission tower damage in the transmission tower-line system,this paper carries out the finite element modeling according to an actual transmission tower.Based on the analysis results,the damage state limit is determined and defined,and 20 ground motion records are selected for amplitude modulation.Using the incremental dynamic analysis method,the relative displacement angle between the rod nodes of the main material and the inclined material of the transmission tower is taken as the seismic demand parameter,and the peak acceleration of ground motion is taken as the intensity parameter,the fragility curve of the transmission tower is obtained by the IDA analysis method to analyze the seismic damage of the transmission tower.The fragility curve of the transmission tower in the system can be compared with the fragility curve of the single tower of the transmission tower,and the influence of the tower-line system coupling on the transmission tower can be obtained.
关键词
实际输电塔/震害/增量动力分析/地震易损性Key words
actual-transmission tower/seismic damage/incremental dynamic analysis/seismic fragility引用本文复制引用
基金项目
2023年北京工业大学重点实验室开放课题(047000541223001)
出版年
2024
NETL
NSTL
万方数据