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基于小波包能量的结构地震动损伤分析

发表时间:2014-07-31  浏览量:1303  下载量:374
全部作者: 周成杰
作者单位: 铁道第三勘察设计院集团有限公司
摘 要: 针对地震动作用下结构的抗震性能评估,利用小波包能量构造整体结构地震损伤评估指标各频带能量比总变化(summation of energy ratio variation,SERV)。运用ANSYS有限元软件建立三维钢框架有限元模型,并对其进行弹塑性时程分析,然后得到地震加速度峰值(peak ground acceleration, PGA)与地震损伤评估指标SERV的关系曲线。数值算例表明:SERV可对结构地震损伤情况进行评估,并且SERV随损伤程度的增大而增大;由PGA-SERV曲线可得到结构无损、轻微损伤、重度损伤和防止倒塌等损伤状态对应的地震加速度峰值。结论可为基于性能的抗震设计提供参考。此外,还通过推覆分析(PUSHOVER)和材料层次损伤分析对结论合理性进行验证。
关 键 词: 土木建筑结构;损伤分析;结构地震损伤模型;小波包;弹塑性时程分析
Title: Damage analysis under ground motion action based on wavelet packet energy
Author: ZHOU Chengjie
Organization: The Third Railway Survey and Design Institute Group Co. Ltd.
Abstract: Aiming at structural seismic performance evaluation, wavelet packet energy was used to construct seismic damage assessment indicator summation of energy ratio variation (SERV). A 3D steel frame finite element model was established by ANSYS program. Then, curves of PGA-SERV was solved through elastic-plastic time history analysis of the finite element model. The numerical example showed that SERV could make assessment on the structural damage and SERV increased with damage degree. Damage conditions such as slight damage, severe damage and collapse could be obtained by PGA-SERV curves, the conclusions could be used for performance-based anti-seismic design. In addition, the rationality of the conclusions was verified by the PUSHOVER analysis and material damage analysis.
Key words: civil building structure; damage analysis; structural seismic damage model; wavelet packet; elastic-plastic time-history analysis
发表期数: 2014年7月第14期
引用格式: 周成杰. 基于小波包能量的结构地震动损伤分析[J]. 中国科技论文在线精品论文,2014,7(14):1386-1392.
 
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