考虑非线性动态分析方法的海啸作用下 SDOF 结构的损伤谱

IF 2.1 4区 工程技术 Q2 GEOCHEMISTRY & GEOPHYSICS
Xiaolan Pan, Zhongyao Lin, Lianpeng Zhang, Zhi Zheng
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引用次数: 0

摘要

本文研究了单自由度(SDOF)系统在海啸荷载下的破坏谱。采用康奈尔多网格耦合海啸(COMCOT)模型计算并获得了 2011 年东北海啸波浪轨迹,并通过东北海啸联合调查(TTJS)数据进行了进一步验证。采用动态分析方法对 SDOF 系统进行了海啸响应分析。经典延性损伤被视为损伤性能。计算了五种力减小因子和 791 种海啸载荷下的破坏谱。对淹没深度、滞后模型、屈服后刚度比 α、粘性阻尼比 ξ 的影响进行了探讨,并从科学和统计学角度进行了解释。结果表明,滞回模型、力减系数 R、屈服后刚度比 α、粘性阻尼比 ξ 对结构破坏的影响是明显的。与静力法的比较和结构阻尼的影响分析表明了应用动力法的必要性。为评估海啸荷载对结构的破坏,开发了一种简化的预测公式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Damage Spectra of SDOF Structures Under Tsunami Actions Considering the Nonlinear Dynamic Analysis Method

This paper studies the damage spectra of single-degree-of-freedom (SDOF) systems for tsunami loading. The 2011 Tohoku tsunami wave traces are computed and obtained by adopting the Cornell Multi-grid Coupled Tsunami (COMCOT) model and are further verified by the Tohoku Tsunami Joint Survey (TTJS) data. The tsunami response analyses of SDOF systems are conducted taking into account the dynamic analysis method. The classical ductility damage is considered as the damage performance. The damage spectra are computed for five force reduction factors and 791 tsunami loadings. The effects of inundation depths, hysteretic model, post-yield stiffness ratio, α, viscous damping ratio, ξ, are explored and interpreted scientifically and statistically. The results demonstrate that the effect of the hysteretic model, force reduction factor, R, post-yield stiffness ratio, α, viscous damping ratio, ξ, on the damage of the structure is evident. Comparison with the static method and influence analysis of structural damping indicate the necessity for the application of the dynamic method. A simplified predictive formulation is developed for the evaluation of structural damage for tsunami loadings.

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来源期刊
Journal of Earthquake and Tsunami
Journal of Earthquake and Tsunami 地学-地球化学与地球物理
CiteScore
2.60
自引率
13.30%
发文量
38
审稿时长
>12 weeks
期刊介绍: Journal of Earthquake and Tsunami provides a common forum for scientists and engineers working in the areas of earthquakes and tsunamis to communicate and interact with one another and thereby enhance the opportunities for such cross-fertilization of ideas. The Journal publishes original papers pertaining to state-of-the-art research and development in Geological and Seismological Setting; Ground Motion, Site and Building Response; Tsunami Generation, Propagation, Damage and Mitigation, as well as Education and Risk Management following an earthquake or a tsunami. We welcome papers in the following categories: Geological and Seismological Aspects Tectonics: (Geology - earth processes) Fault processes and earthquake generation: seismology (earthquake processes) Earthquake wave propagation: geophysics Remote sensing Earthquake Engineering Geotechnical hazards and response Effects on buildings and structures Risk analysis and management Retrofitting and remediation Education and awareness Material Behaviour Soil Reinforced concrete Steel Tsunamis Tsunamigenic sources Tsunami propagation: Physical oceanography Run-up and damage: wave hydraulics.
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