Probabilistic Evaluation of Seismically Isolated Building Using Quintuple Friction Pendulum Isolator

Sodha, Ankit; Vasanwala, Sandip A.; Soni, Devesh P.

doi:10.1007/978-981-13-1966-2_13

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…The isolator has six spherical sliding surfaces, which provides designers with multiple options to achieve complex seismic isolation requirements. A detailed mathematical model and finite element technique to model this type of isolator are proposed by Keikha and Ghodrati [70] and Sodha et al [71], respectively.…”

Section: Sliding Isolation Systems With Multiple Sliding Surfacesmentioning

confidence: 99%

Sliding Isolation Systems: Historical Review, Modeling Techniques, and the Contemporary Trends

et al. 2022

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Base isolation techniques have emerged as the most effective seismic damage mitigation strategies. Several types of aseismic devices for base isolation have been invented, studied, and used. Out of several isolation systems, sliding isolation systems are popular due to their operational simplicity and ease of manufacturing. This article discusses the historical development of passive sliding isolation systems, such as pure friction systems, friction pendulum systems, and isolators with other sliding surface geometries. Moreover, multiple surface isolation systems and their behavior as well as the effectiveness of using complementary devices with standalone passive isolation devices are examined. Furthermore, the article explored the various modeling techniques adopted for base-isolated single and multi-degree freedom building structures. Special attention has been given to the techniques available for modeling the complex phenomena of sliding and non-sliding phases of sliding bearings. The discussion is further extended to the development in the contemporary areas of seismic isolation, such as active and hybrid isolation systems. Although a significant amount of research is carried out in the area of active and hybrid isolation systems, the passive sliding isolation system still has not lost its appeal due to its ease of adaptability to the structures.

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Section: Sliding Isolation Systems With Multiple Sliding Surfacesmentioning

confidence: 99%

Sliding Isolation Systems: Historical Review, Modeling Techniques, and the Contemporary Trends

et al. 2022

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“…Sodha et al (2017) investigated the behavior of a linear multi-degree freedom system supported by QFP bearings when near-and far-fault earthquakes were applied. A probabilistic assessment of structures with QFP isolators was performed by Sodha et al (2019). Keikha and Ghodrati Amiri (2019) investigated the thermal-mechanical performance of QFP.…”

Section: Introductionmentioning

confidence: 99%

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

Habib

Yıldırım²

2023

MMMS

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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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Influence of Isolator Properties and Earthquake Characteristics on the Seismic Behavior of RC Structure Equipped with Quintuple Friction Pendulum Bearings

Habib¹,

Yıldırım²

2022

Int. J. Str. Stab. Dyn.

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Indeed, base isolation systems have gained significant attention from researchers and designers over the last few decades. Within this context, various technologies were developed to improve the performance of structures under strong earthquake shaking intensities. Recently, a new generation of multi-stage friction pendulum (FP) bearings known as “Quintuple Friction Pendulum” (QFP) was introduced to the literature to attain high energy dissipation capability. The main advantages of this bearing come from its ability to achieve complex multi-stage adaptive behavior with smoothed loading and unloading when subjected to lateral forces owing to its five effective pendula and nine operation regimes. On the other hand, investigations that studied the influence of the bearing properties and the impact of various ground motion characteristics on the performance and behavior of this isolation system are scarce. Thus, this research aims to conduct a parametric assessment that highlights and quantifies the effect of the various isolator properties and earthquake characteristics on the behavior of the base-isolated structure. As a part of the study, finite element models considering the nonlinearity of the isolation system and the superstructure will be developed in OpenSees. Generally, the study results have shown that the behavior of the isolator is significantly influenced by its properties and the type of earthquake being applied.

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Probabilistic Evaluation of Seismically Isolated Building Using Quintuple Friction Pendulum Isolator

Cited by 4 publications

References 8 publications

Sliding Isolation Systems: Historical Review, Modeling Techniques, and the Contemporary Trends

Sliding Isolation Systems: Historical Review, Modeling Techniques, and the Contemporary Trends

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

Influence of Isolator Properties and Earthquake Characteristics on the Seismic Behavior of RC Structure Equipped with Quintuple Friction Pendulum Bearings

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