Base Isolation of Buildings with Curved Surface Sliders: Basic Design Criteria and Critical Issues

Saitta, Fernando; Clemente, Paolo; Buffarini, Giacomo; Bongiovanni, Giovanni; Salvatori, Antonello; Grossi, Cristian

doi:10.1155/2018/1569683

Cited by 25 publications

(7 citation statements)

References 12 publications

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“…(2) Sliding isolation systems are being researched exhaustively due to their simplicity and cost-effectiveness. In fact, the cost of a curved surface isolator is lower than high-damping rubber bearings [161]. Although the sliding isolators are very effective in seismic isolation, some inherent issues, such as dependency of friction on velocity, heat, and contact pressure, need special attention during the design.…”

Section: Discussionmentioning

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: Discussionmentioning

confidence: 99%

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

et al. 2022

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“…Вивчення впливу вібрацій на конструкції будівель і споруд дозволили удосконалити методи їх розрахунку на дію динамічних впливів (удари, вибухи тощо) [15][16][17], встановити параметри динамічної взаємодії будівель з основою [18] і параметри промислової сейсміки [19], оцінити рівень коливань, генерованих рухом різних видів транспорту [20][21][22], сформулювати принципи забезпечення надійності будівель і споруд у сейсмічних районах [23,24], запропонувати системи сейсмоізоляції будівель і споруд [25,26].…”

Section: аналіз останніх досліджень і публікаційunclassified

Modeling of the Geospatial Database for Vibration Monitoring in Settlements

Kozar

Lashko

Halchenko

et al. 2021

MEC

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The processes of urbanization lead to increased levels of influence of physical factors and, in particular, vibration. Vibration can damage buildings and have an adverse effect on the human body. Therefore, the issues of improving vibration monitoring systems are relevant. The presence of a spatial component in the data on the vibration situation indicates the feasibility of using geographic information systems in this area. The works of scientists in various fields of science are devoted to the study of the influence of vibrations on human beings and their environment. In existing studies the basic methodological principles for assessing the impact of vibration on people and environment were defined and methods for estimating vibration levels were developed. However, insufficient attention to the problems of vibration monitoring in the settlements is paid. The modern settlement can be described as a complex system formed by many interconnected anthropogenic and natural elements of the territories. Some components of this system belong to the category of objects that need to be protected from vibration, others are sources of vibration, and some belong to both categories. Facilities that require measures to protect against vibration include residential and public buildings, residential areas, parks, squares, recreation areas. Sources of vibration in buildings include: transport, industrial enterprises and installations, engineering equipment of buildings, built-in enterprises of trade, consumer services, etc. Geospatial data in the monitoring systems of the territory of the settlement is multisectoral and complex. Appropriate spatial data infrastructure is required for their efficient processing. Modeling of vibration monitoring system should be performed as part of the infrastructure of geospatial data at the local level. The basic set of spatial data for vibration monitoring included data on land plots, buildings, streets, utilities, railways, highways, hydrography, relief, soils, zoning. The «Address» class has been introduced to support address data. The set of thematic geospatial data includes information on the sources and areas of vibration pollution, control points and results of vibration levels, vibration protection devices, objects on which blasting or construction works are carried out. Based on the results of the analysis, a conceptual scheme of the geospatial database was developed. The proposed model can be the basis for designing the next stages of geographic information system for monitoring vibration.

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“…The large diffusion of seismic isolation points out the problem of its correct use [17]. The main features, to be accounted for in an optimum preliminary design and check, have been pointed out both for high damping rubber bearings [18][19][20] and for curved surface sliders [21].…”

Section: Introductionmentioning

confidence: 99%

Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes

et al. 2022

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The behavior of a reinforced concrete building, seismically isolated with high damping rubber bearing (HDRB) and sliding devices (SD), observed during the most important events of the seismic sequence that struck central Italy from August 2016 to January 2017, is analyzed. Due to the epicenter distances, all the events had light effects at the site, thus the isolation system was not always put into action. A previous very low energy earthquake and the ambient vibration analysis are used for comparison. The study of the isolation system response is first carried out and the variability of the resonance frequencies with the input energy at the site is pointed out. These frequencies are quite close to those of the superstructure considered as fixed base. Small cracks were observed after the sequence in some partition walls of the building. The analysis of the superstructure was performed by means of a finite element model, assuming a non-linear model for the isolators, based on previous experimental data. The importance of a suitable decoupling between the superstructure and the ground and the contribution of the sliding devices under low energy earthquake is pointed out.

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Base Isolation of Buildings with Curved Surface Sliders: Basic Design Criteria and Critical Issues

Cited by 25 publications

References 12 publications

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

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

Modeling of the Geospatial Database for Vibration Monitoring in Settlements

Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes

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