Earthquake risk mitigation in Istanbul museums

Erdik, Mustafa; Durukal, E.; Ertürk, Nevra; Sungay, Bilgen

doi:10.1007/s11069-009-9411-2

Cited by 22 publications

(7 citation statements)

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“…The limitation of excessive motion of rigid bodies under earthquake excitation is a fundamental topic in the seismic protection of art objects in museums (Erdik et al, 2010;Agbabian et al, 1991), medical devices in hospitals (Konstantinidis and Makris, 2009) and goods stored in ships. Since late XIX century, the behaviour of piece of equipments, statues, storage tanks, or even tall buildings has been studied as that of rigid bodies with relation to different base excitations (Cennamo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Rocking of freestanding objects: theoretical and experimental comparisons

Gesualdo

Iannuzzo

Minutolo

et al. 2018

jtam

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The methodical study of safeguard of artistic heritage and other devices subjected to earthquake and, in general, to time-dependent forces has considerably spreaded in the last years, thus increasing researchers' interest in problems concerning motions of rigid objects simply supported on a base plane. The behaviour of piece of equipments, statues, storage tanks, or even tall buildings has been in fact studied as that of rigid bodies with relation to different base excitations. In some cases, the possibility of influencing the quality of motion can be a strong tool to reduce vulnerability, like in the cases in which rocking motion is to be avoided and sliding motion is welcome. This paper focuses the attention on this last problem. This is the same large class of both non-structural and structural elements that can lose their functionality because of earthquake motions. The results of numerical modelling of sliding and rocking motion in presence of both different excitations and mechanical parameters are presented and compared with experimental data performed by the authors. The results developed are in good agreement with the laboratory tests, and this assures the reliability of both the analytical procedure and the determination of the parameters involved.

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Section: Introductionmentioning

confidence: 99%

Rocking of freestanding objects: theoretical and experimental comparisons

Gesualdo

Iannuzzo

Minutolo

et al. 2018

jtam

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“…‐ Rolling‐type isolation systems . An example is the ‘Ball in Cone’ (BNC) device , which consists of two conical steel surfaces that contain a steel sphere; the damping of the system is negligible, in fact BNC devices are usually installed in parallel with viscous or friction dampers. A characteristic of the BNC device, because of its conical surfaces, is that it has no characteristic natural frequency.…”

Section: Introductionmentioning

confidence: 99%

“…A characteristic of the BNC device, because of its conical surfaces, is that it has no characteristic natural frequency. This device was designed and developed for standard geometries and typical loads of museum objects, to be applied in Turkish museums for seismic risk mitigation. Another rolling system is the ‘Static Dynamic Interchangeable—Ball Pendulum System’ (SDI‐BPS) .…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization, design and modelling of the RBRL seismic‐isolation system for lightweight structures

Donà

Muhr

Tecchio

et al. 2016

Earthq Engng Struct Dyn

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The Rolling-Ball Rubber-Layer (RBRL) system was developed to enable seismic isolation of lightweight structures, such as special equipment or works of art, and is very versatile, a great range of equivalent natural frequencies and coefficients of damping being achievable through choice of the system parameters.The necessity to have a simple and effective design procedure has led to a new parametric experimentation at Tun Abdul Razak Research Centre (TARRC) on the rolling behaviour of the RBRL system and load-deflection behaviour of the recentering springs. The experimental results, together with theories for the rolling resistance of a loaded steel ball on a thin rubber layer and the lateral load-deflection behaviour of cylindrical rubber springs, are used to develop a general design method for the RBRL system, which allows the system to be tailored to the specific application.Sinusoidal test results are presented for the small-deflection behaviour of the system, influenced by the presence of a viscoelastic depression on the rubber tracks beneath each ball, and an amplitude-dependent time-domain model is proposed, based on these results and on the steady-state behaviour of the system. The model is validated through comparison with previously performed shaking-table tests. Attention is here restricted to uniaxial behaviour.

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“…The mount making strategies traditionally adopted to annul these effects consist in fixing the objects tightly to the base or the pedestal [1,2], which also allows mitigating the risk of falling off for overturning-prone elements. However, fastening strategies have several drawbacks, the most important of which are: (a) the need to drill holes to house connectors (bolts, screws, dowels, or chemical anchors), both in the bases or pedestals of the artworks and in the adjacent floors and/or walls, which is often incompatible with the artistic value of the exhibits and the interfacing surfaces; (b) the full transmission of the seismic accelerations from the supporting floor to the objects, without any mitigation of their dynamic response.…”

Section: Introductionmentioning

confidence: 99%