余震地震动参数及潜在破坏势研究

论文摘要

历史震害资料表明,一次主震后通常伴有大量余震的发生。由于主震和余震的发震时间间隔较短,使得主震损坏结构在短时间内很难得到有效的修复,因此,主震损伤结构在经历余震时会产生二次损伤,甚至造成结构倒塌。现有的各国抗震设计规范中仅考虑一次地震作用,而忽略了余震的潜在危险。因此,有必要对结构在主、余震联合作用下的破坏势进行评估。而要评估主、余震联合作用的潜在破坏势,需要对主余震序列强度与结构损伤之间的相关性进行充分评估。鉴于上述,本文对主余震序列的强度与结构损伤之间的相关性进行了较为全面地评估,主要内容如下:1)选取662条真实主余震序列作为地震输入。采用21个典型地震动参数用于表征主、余震的地震动强度。对所挑选的真实主余震序列的主、余震强度参数之间的关系进行分析。2)采用Park-Ang损伤指数作为结构损伤指标,以非线性单自由度体系作为分析对象,开展了结构在真实主余震序列作用下的累积损伤和增量损伤,分析了主震参数、余震参数和主余震序列复合型参数与结构累积损伤、增量损伤和损伤比值之间的线性相关性和秩相关性。3)分析了非线性单自由度体系滞回模型对主震参数、余震参数和主余震序列参数与结构损伤之间相关性的影响。研究结果表明,采用“余震强度/主震强度”复合型参数与结构累积损伤和增量损伤之间的相关性较强。非线性单自由度体系滞回模型参数对上述相关性结果的影响较小,可以忽略。

论文目录

• 摘要
• Abstract
• Chapter 1 Introduction
•   1.1 Research sources and background
•     1.1.1 Research sources
•     1.1.2 Research background
•   1.2 Literature review
•     1.2.1 Studies on main shocks and aftershocks ground motion characteristics
•     1.2.2 Effect of aftershocks on structural response
•     1.2.3 Damage potential of ground motions
•     1.2.4 Inelastic response spectra due to mainshock-aftershock sequences
•   1.3 Main contents of this study
• Chapter 2 Ground motion selection of main shock-aftershock sequences andthe corresponding parameters
•   2.1 Introduction
•   2.2 Selection of main shock-aftershock ground motions
•     2.2.1 Magnitude-distance relationship
•     2.2.2 Magnitude-acceleration relationship
•   2.3 Analysis of main shock-aftershock sequence parameters
•     2.3.1 Ground motion parameters related to acceleration
•     2.3.2 Ground motion parameters related to velocity
•     2.3.3 Ground motion parameters related to displacement
•   2.4 Chapter Summary
• Chapter 3 Correlation between main shock-aftershock intensities andstructural damages
•   3.1 Introduction
•   3.2 Nonlinear SDOF system and structural damage index
•     3.2.1 Modeling of nonlinear SDOF system
•     3.2.2 Selection of Structural Damage Index
•   3.3 Cumulative damage and incremental damage
•   3.4 Linear Correlation assessment
•   3.5 Chapter summary
• Chapter 4 Effects of hysteretic behaviors on correlation between main shock-aftershock intensities and structural damages
•   4.1 Introduction
•   4.2 Pearson correlation coefficients corresponding to R=2
•     4.2.1 Results related to the acceleration-based parameters
•     4.2.2 Results related to the velocity-based parameters
•     4.2.3 Results related to the displacement-based parameters
•   4.3 Pearson correlation coefficients corresponding to R=3
•     4.3.1 Results related to the acceleration-based parameters
•     4.3.2 Results related to the velocity-based parameters
•     4.3.3 Results related to the displacement-based parameters
•   4.4 Pearson correlation coefficients corresponding to R=4
•     4.4.1 Results related to the acceleration-based parameters
•     4.4.2 Results related to the velocity-based parameters
•     4.4.3 Results related to the displacement-based parameters
•   4.5 Pearson correlation coefficients corresponding to R=5
•     4.5.1 Results related to the acceleration-based parameters
•     4.5.2 Results related to the displacement-based parameters
•     4.5.3 Results related to the displacement-based parameters
•   4.6 Chapter summary
• Conclusions
• References
• Acknowledgements
• Resume

文章来源

类型: 硕士论文

作者: 艾萨姆（Esam Abdullah Saeed Haidar AL-athwari）

导师: 于晓辉

关键词: 主余震序列,体系,累积损伤,增量损伤,损伤指数,滞回特性

来源: 哈尔滨工业大学

年度: 2019

分类: 基础科学

专业: 地质学,地球物理学

单位: 哈尔滨工业大学

基金: the National Natural Science Foundation Youth Project “Study on Multi-element Joint Vulnerability of Reinforced Concrete Frame Structures under Main shocks-Aftershocks Sequences”(Project Approval Number:51408155)

分类号: P315.9

DOI: 10.27061/d.cnki.ghgdu.2019.001978

总页数: 113

文件大小: 25255K

下载量: 39