[1]李波,毛晨曦,郭恩栋.基于性能的移动通信铁塔地震易损性分析[J].自然灾害学报,2018,(03):021-28.[doi:10.13577/j.jnd.2018.0303]
 LI Bo,MAO Chenxi,GUO Endong.Seismic fragility analysis of mobile communication towers based on structural performance[J].,2018,(03):021-28.[doi:10.13577/j.jnd.2018.0303]
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基于性能的移动通信铁塔地震易损性分析
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年03期
页码:
021-28
栏目:
出版日期:
2018-06-28

文章信息/Info

Title:
Seismic fragility analysis of mobile communication towers based on structural performance
作者:
李波12 毛晨曦1 郭恩栋1
1. 中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080;
2. 滨州学院 建筑工程学院, 山东 滨州 256600
Author(s):
LI Bo12 MAO Chenxi1 GUO Endong1
1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;
2. School of Architecture Engineering, Binzhou University, Binzhou 256600, China
关键词:
移动通信铁塔损伤水平划分Pushover分析IDA分析易损性分析
Keywords:
mobile communication towersdamage levelpushover analysisIDA analysisvulnerability analysis
分类号:
TU359;X9
DOI:
10.13577/j.jnd.2018.0303
摘要:
移动通信铁塔的地震易损性研究是城市移动通信系统震后灾害预测的重要环节。以常见的50 m四方形角钢塔和50 m三管塔为研究对象,通过ABAQUS软件建立其有限元模型。基于Pushover分析结果划分了铁塔的损伤水平并确定了不同损伤水平对应的性能参数数值。采用FEMA P695的建议方法遴选出Ⅱ类场地上的10条远场地震动和10条近场地震动,以所选地震动作为输入进行了2个铁塔的增量动力分析,得到铁塔的IDA曲线和地震易损性曲线。分析结果表明:Ⅱ类场地上的四方形角钢塔和三管塔在远场地震动作用下的顶点位移角均要比近场地震动作用下得到的顶点位移角要大;当铁塔基本周期所对应谱加速度Sa (T1,5%)达到规范设计罕遇地震谱加速度值时,铁塔倒塌概率接近于0,四方形角钢塔和三管塔均具有较好的抗震性能;当地震强度更大时,四方形角钢塔抗倒塌性能比三管塔好。
Abstract:
Research on seismic vulnerability of mobile communication towers is important for the prediction of post earthquake disaster of urban mobile communication system. A 50 meters high lattice angle tower and a 50 meters high three-tube tower are studied in this study. Finite element models of the two towers are established by the software of ABAQUS. Based on the results of pushover analysis, the damage level of the tower is divided and the performance parameters corresponding to the different damage levels are determined. Using the method of FEMA P695, 10 far-field records and 10 near-field records on the class Ⅱ site are selected. The incremental dynamic analysis of two towers was carried out with the selected ground motion as input. The IDA curves and the seismic fragility curves were obtained. Analysis results show that: under the action of the far-field ground motions, the drift ratio of the two towers on the Ⅱ site are higher than that under the action of the near-field ground motions. When spectral acceleration Sa (T1,5%) of the tower reaches the level of large earthquake, the collapse probability of the towers is nearly zero. Both lattice angle tower and three-tube tower have good seismic performance. Simultaneously, the anti-collapse performance of the lattice angle tower is better than that of the three-tube tower in the big earthquake.

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备注/Memo

备注/Memo:
收稿日期:2018-01-19;改回日期:2018-01-30。
基金项目:国家科技支撑计划课题(2015BAK17B05);大中城市地震灾害情景构建重点专项项目(2016QJGJ11);中国地震局创新团队发展计划(中国大陆地区地震灾害模拟与评估);山东省自然科学基金项目(ZR2018PEE020)
作者简介:李波(1988-),男,博士研究生,主要从事通信系统地震灾害模拟与预测.E-mail:libo20070025@126.com
通讯作者:毛晨曦(1974-),女,研究员,博士,主要从事结构工程抗震和通信系统地震灾害评估等方面的研究.E-mail:maochenxi@iem.ac.cn
更新日期/Last Update: 1900-01-01