Distribution of strong input energy in base-isolated structures with complex nonlinearity: a parametric assessment

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Multidiscipline Modeling in Materials and Structures Pub Date : 2023-02-01 DOI:10.1108/mmms-08-2022-0158
A. Habib, U. Yildirim
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Abstract

PurposeOver the past few decades, several base isolation systems have been developed to enhance the performance of structures under extreme earthquake shaking intensities. Recently, to achieve high energy dissipation capabilities, a new generation of multi-stage friction pendulum (FP) bearings known as the “Quintuple Friction Pendulum (QFP)” was introduced in the literature. With the help of its five effective pendula and nine operational regimes, this bearing's major benefits stem from its ability to accomplish complicated multi-stage adaptive behavior with smoothed loading and unloading when subjected to lateral forces.Design/methodology/approachWithin the assessment context, five finite element models of reinforced concrete frames supported on QFP isolators with different properties will be developed in OpenSees. Thereafter, a set of 60 earthquakes will be analyzed using the nonlinear time history analysis approach, and the impact of each ground motion record's properties will be evaluated.FindingsOverall, the study's findings have demonstrated that the characteristics of the isolator, combined with the type of earthquake being applied, have a substantial impact on the isolator's behavior.Originality/valueCurrently, no studies have examined the energy distribution of structural systems equipped with this type of isolation system while considering the influence of earthquake characteristics. Thus, this study is intended to extend the findings available in the literature by discussing and illustrating the distribution of strong ground motions input energy into highly nonlinear base-isolated systems that account for the bearing and superstructural materials' nonlinearity, geometric nonlinearity and leakage-prevented viscous damping nonlinearity. Besides, it investigates the influence of various earthquake characteristics on the energy dissipation of such buildings.
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具有复杂非线性的基础隔离结构中强输入能量的分布:参数化评估
在过去的几十年里,已经开发了几种基础隔震系统,以提高结构在极端地震震动强度下的性能。最近,为了实现高能量耗散能力,新一代多级摩擦摆(FP)轴承被称为“五重摩擦摆(QFP)”,在文献中被引入。在5个有效摆和9个操作机制的帮助下,该轴承的主要优势在于,当受到侧向力时,它能够完成复杂的多级自适应行为,并实现平滑的加载和卸载。设计/方法/方法在评估背景下,将在OpenSees中开发具有不同性能的QFP隔振器支撑的钢筋混凝土框架的五个有限元模型。随后,将使用非线性时程分析方法对60次地震进行分析,并评估每个地震动记录的性质对地震的影响。总的来说,这项研究的发现表明,隔离器的特性,结合所应用的地震类型,对隔离器的行为有实质性的影响。目前,还没有研究在考虑地震特征影响的情况下,对配置此类隔震系统的结构体系的能量分布进行研究。因此,本研究旨在通过讨论和说明强地面运动输入能量到高度非线性基础隔离系统的分布来扩展文献中的发现,该系统考虑了轴承和上部结构材料的非线性、几何非线性和防止泄漏的粘性阻尼非线性。此外,还研究了各种地震特征对此类建筑耗能的影响。
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
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