基于五重摩擦摆支座的钢筋混凝土弯矩框架非线性响应历史分析

IF 2.1 4区 工程技术 Q2 GEOCHEMISTRY & GEOPHYSICS Journal of Earthquake and Tsunami Pub Date : 2022-11-11 DOI:10.1142/s1793431123500021
A. Habib, U. Yildirim
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引用次数: 1

摘要

在过去的几十年里,随着新技术的发展,基础隔震系统取得了显著的进步,以提高结构在中等和严重地震激励下的性能。多级摩擦摆是最有效的系统之一,因为它的有效摆的范围很广,有几种制度,提供了良好的能量耗散能力。最近,被称为“五重摩擦摆”的新一代摩擦摆轴承被介绍到文献中,并从此引起了研究人员的注意。这种隔振器最显著的优点是它能够实现多级自适应行为,从暴露在水平力下的结构中显示出很高的能量耗散能力。事实上,研究概述了在这种类型的隔离系统上支持的结构的非线性建模过程是稀缺的。因此,本研究旨在说明和讨论开发符合抗震规范的有限元模型的方法,用于设计和分析在OpenSees和SAP2000中用于非线性响应历史分析的五重摩擦摆轴承支撑的钢筋混凝土弯矩框架。作为研究的一部分,将考虑隔震系统和上部结构的非线性。此外,还讨论了克服阻尼泄漏和隔振器刚度修正等关键问题的方法。总的来说,所讨论的数值算例的结果表明,两种有限元包都能够实现QFP迟滞行为以及计算相似的上层结构响应。此外,与理论预期相比,所述克服阻尼泄漏的方法提供了可靠的结果。此外,校正隔离器初始刚度的建议方法有助于准确捕捉结构的周期。
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Modeling Reinforced Concrete Moment Frames Supported on Quintuple Friction Pendulum Bearings for Nonlinear Response History Analysis
Base isolation systems have attained significant advancements over the past several decades, with new technologies being developed to enhance the performance of structures when subjected to moderate and severe seismic excitations. The multi-stage friction pendulum is among the most efficient systems owing to its broad range of effective pendula with several regimes that provide excellent energy dissipation abilities. Lately, a new generation of friction pendulum bearings called “Quintuple Friction Pendulum” was introduced to the literature and has since gained the attention of researchers. This isolator’s most significant advantages are the results of its capability to achieve multi-stage adaptive behavior which shows high energy dissipation capability from structures exposed to horizontal forces. Indeed, investigations that outlined the process for nonlinear modeling of structures supported on this type of isolation system are scarce. Thus, this research is intended to illustrate and discuss the approach for developing seismic code compliance finite element models for designing and analyzing reinforced concrete moment frames supported on quintuple friction pendulum bearings for nonlinear response-history analysis in OpenSees and SAP2000. As a part of the study, the nonlinearity of the isolation system and the superstructure will be considered. Moreover, the methods for overcoming essential issues such as damping leakage and isolator’s stiffness correction will be discussed. In general, the results of the discussed numerical examples have shown that both finite element packages are capable of achieving QFP hysteresis behavior as well as computing similar superstructural responses. Furthermore, the illustrated method of overcoming damping leakage provided reliable outcomes compared to the theoretical expectations. As well as the suggested approach for correcting the isolator’s initial stiffness was helpful in terms of accurately capturing the structure’s periods.
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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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