Mathematical model and results for seismicresponses of a nonlinear isolation system

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-09-01 DOI:10.12989/EAS.2021.21.3.291

Shanshan Li, P. Xiang, Biao Wei, Tan Hao, Yunji Fu

引用次数: 0

Abstract

The friction and viscous damping actions always cause nonlinear responses of a seismic isolation system under earthquakes. Their influence on the seismic responses needs investigation in detail. In order to analyze the effects of nonlinear phenomenon on the seismic isolation system, a mathematical model was built for such a nonlinear isolation system, and the nonlinear responses were calculated and analyzed. The numerical results indicate that an appropriate combination of spring, Coulomb friction and viscous damper is able to achieve an optimal seismic performance. The stiffness and natural period of system are significantly influenced by the friction action. Both the friction action and the viscous damping action can dissipate earthquake energy, and the optimal value of one depends on the value of the other in the seismic isolation system. All of the values of spring, Coulomb friction and viscous damper should be accurately evaluated before the design of seismic isolation system.

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非线性隔震系统地震反应的数学模型及结果

在地震作用下，摩擦和粘性阻尼作用总是引起隔震系统的非线性响应。它们对地震反应的影响需要详细研究。为了分析非线性现象对隔震系统的影响，建立了这种非线性隔震系统的数学模型，并对其非线性响应进行了计算和分析。数值结果表明，弹簧、库仑摩擦和粘性阻尼器的适当组合能够获得最佳的抗震性能。摩擦作用对系统的刚度和固有周期有显著影响。在隔震系统中，摩擦作用和粘性阻尼作用都可以耗散地震能量，其中一个的最优值取决于另一个的值。在设计隔震系统之前，应准确评估弹簧、库仑摩擦和粘性阻尼器的所有值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response