建筑结构学报2024，Vol.45Issue(7)：108-119,12.DOI:10.14006/j.jzjgxb.2023.0731
基于应变统计矩的三管塔损伤识别方法研究
Damage identification method of three-tube tower based on strain statistical moments
摘要
Abstract
In order to prevent the occurrence of communication tower structural safety accidents and warn the possible damages in time,it is of vital significance to carry out the communication tower structural safety monitoring work.In this paper,a damage identification method for the three-tube tower structure was proposed by taking the changing rate of the statistical moment of strain as the damage index.The relationship between the strain response statistical moments and structural stiffness of multi-degree-of-freedom structural system was theoretically deduced,and the damage index of strain fourth-order statistical moment changing rate was proposed.By establishing the relationship between the fourth-order statistical moments of strain and the strain energy density,the sensor deployment was optimized based on the principle of maximum strain energy density.By setting different signal-to-noise ratios,the effectiveness of the method was verified based on numerical modeling under the condition of varied wind speed and direction,and the identification effect was compared with other damage identification methods.At the same time,it was analyzed in combination with the measured strain data of the three-tube towers on site.The results show that the method can optimize the sensor deployment,reduce the cost and improve the monitoring efficiency,and identify the damage of the three-tube tower in the local area range with 20 dB ambient noise.关键词
三管塔/损伤识别/应变统计矩/应变能量密度Key words
three-tube tower/damage identification/statistical moment of strain/strain energy density分类
建筑与水利引用本文复制引用
阳洋,高志豪,张旭..基于应变统计矩的三管塔损伤识别方法研究[J].建筑结构学报,2024,45(7):108-119,12.基金项目
国家自然科学基金创新群体计划(52221002),中央高校基本科研基金(2022CDJQY-009). （52221002）
