A Review of Seismic Isolation for Buildings: Historical Development and Research Needs

Warn, Gordon P.; Ryan, Keri L.

doi:10.3390/buildings2030300

Cited by 173 publications

(82 citation statements)

References 70 publications

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“…It is a known fact that in this type of bearings loading and unloading paths nearly overlap; that is, their behavior is linear elastic (Warn and Ryan 2012). Accordingly, the lateral stiffness of the bearing is calculated by the following equation: In the above equation, G R is the shear modulus of rubber material, A b is the bonded plan area of the rubber bearings and h b is the thickness of the rubber bearing (or height of the rubber).…”

Section: Modeling Of Bearingsmentioning

confidence: 99%

Parametric study on the effect of structural and geotechnical properties on the seismic performance of integral bridges

Erhan

Dicleli

2017

Bull Earthquake Eng

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In this paper practical techniques are introduced for detailed modeling of soilpile and soil-abutment interaction effects for integral bridges (IBs). Furthermore, a parametric study is conducted to determine appropriate structural configurations and geotechnical properties to enhance the seismic performance of IBs. For this purpose, numerous nonlinear structural models of a two-span IB including dynamic soil-bridge interaction effects are built. Nonlinear time history analyses (NTHA) of the IB models are then conducted using a set of ground motions with various intensities. In the analyses, the effect of various structural and geotechnical properties such as foundation soil stiffness, backfill compaction level, pile size and orientation, abutment height and thickness are considered. The results of NTHA are then used to assess the effects of these properties on the seismic performance of IBs in terms of member forces and deformations. It is found that while the proposed modeling techniques for IBs are easy to implement in commercially available structural analysis programs, they are also computationally efficient. However, the proposed structural model may not be used to study the soil deformations along the length of the embankment. For the IB and modeling approach under consideration, the bridge seismic response is found to be insensitive to the length of the embankment and damping of the embankment soil. Furthermore, IBs built with shorter and thinner abutments as well as large steel H-piles oriented to bend about their strong axis exhibit better seismic performance.

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Section: Modeling Of Bearingsmentioning

confidence: 99%

Parametric study on the effect of structural and geotechnical properties on the seismic performance of integral bridges

Erhan

Dicleli

2017

Bull Earthquake Eng

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“…A successful strategy to control the seismic effects on civil structures is the base-isolation (BI) technique which introduces a flexible layer at the base of the building to drastically increase its fundamental period [1]. A different strategy may be that of isolating portions of the mass so as to lessen the inertial loads acting on the building [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Partial floor mass isolation to control seismic stress in framed buildings

Porcu¹

2019

Int. J. SAFE

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Isolating portions of the floor mass through rigid-plastic connectors may reduce the effects of strong earthquakes on framed buildings. This strategy was shown to be effective for single-storey frames, provided that a reasonably low plastic limit given to connectors and large enough portions of mass be disconnected. The stress reduction is however found to depend significantly on some interrelated parameters and on the given earthquake. By means of an analytical study and a nonlinear numerical investigation involving single-storey frames and four recorded earthquakes, the present paper gives a swift way to estimate the extent of stress reduction that can be achieved under a given earthquake, for preset values of the key parameters. Some empirical formulae are also provided to estimate the peak relative displacement that is reached by the disconnected mass.

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“…Energy dissipation can usually be achieved by fluid viscosity (velocity‐dependent damper) or hysteresis of the force‐displacement relationship (deformation‐dependent damper). Reviews of several types of base isolation systems have been well described in .…”

Section: Introductionmentioning

confidence: 99%

Comparative response and performance of base‐isolated and fixed‐base structures

Chimamphant

Kasai

2015

Earthq Engng Struct Dyn

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Summary A building with a seismic isolation system, in an earthquake, is recognized as producing substantially smaller accelerations and deformations compared with a building that use other systems. This type of system is therefore expected to better protect the building's nonstructural components, equipment, and other contents that are essential for the activities conducted in the building. Unlike many available studies on building responses, only a small number of studies on a buildings' nonstructural component responses are available, and no study has directly addressed building performance with regard to nonstructural component protection. This paper therefore measures the performance of various seismically isolated buildings. Specifically, the effects of important structural parameters, namely, isolation stiffness, isolation damping ratio, and number of stories on the response of base‐isolated structures are investigated parametrically. Ground motions with 2% exceedence in 50years Maximum Considered Earthquake (MCE) are used. Performance is compared with that of fixed‐base structures in order to present data that will be useful in justifying the more costly technology. The buildings are 3, 9, and 20 stories, represented by MDOF shear‐beam models. As examples of displacement‐sensitive and acceleration‐sensitive components, partition walls and ceilings are considered, respectively. The Pacific Earthquake Engineering Research Center performance‐based earthquake engineering methodology is adopted to evaluate the failure return periods of the examples based on their available fragility curves. In addition, the curves are varied hypothetically to understand the sensitivity of the return period to the curve features. Then, the median and dispersion of fragility curves required to satisfy the components' desired failure return period are obtained. Copyright © 2015 John Wiley & Sons, Ltd.

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A Review of Seismic Isolation for Buildings: Historical Development and Research Needs

Cited by 173 publications

References 70 publications

Parametric study on the effect of structural and geotechnical properties on the seismic performance of integral bridges

Parametric study on the effect of structural and geotechnical properties on the seismic performance of integral bridges

Partial floor mass isolation to control seismic stress in framed buildings

Comparative response and performance of base‐isolated and fixed‐base structures

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