Seismic control of regular and irregular buildings using viscoelastic passive dampers

Sophocleous, A. A.

doi:10.1002/stc.4300080211

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…Apart from base isolation, other passive techniques have been investigated in the last 30 years for an innovative antiseismic design such as energy dissipation systems based both on the hysteresis of the material and on the dissipation produced by viscous materials, tuned mass dampers, and so on.…”

Section: Introductionmentioning

confidence: 99%

Rolling devices for seismic isolation of lightweight structures and equipment. Design and realization of a prototype

Foti

2018

Struct Control Health Monit

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Summary The present paper shows the results of an experimental study on new rolling seismic isolators made with steel cylindrical elements arranged on two levels, interposed between flat rubber layers, and rolling in the same direction. It is a rather simplified version of an isolator designed to have the cylinders disposed on two levels, according to two directions perpendicular to one another in the horizontal plane, in order to uncouple any component of the seismic force. In the original basic idea, the rolling planes present a concave surface with a high radius of curvature for recentering capabilities of the device. The rolling of the cylinders allows the isolation of the structure uncoupling the motion of the structure by the ground motion, although the rubber layers have to activate a viscous dissipation process, thanks to the steel‐rubber contact. A prototype of the simplified version of the device has been realized and tested to obtain the hysteresis behavior and the equivalent viscous damping under increasing values of the axial preload, either with glued or vulcanized rubber layers. The results have been finally discussed also to identify the possible future developments and improvements of the proposed device.

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Section: Introductionmentioning

confidence: 99%

Rolling devices for seismic isolation of lightweight structures and equipment. Design and realization of a prototype

Foti

2018

Struct Control Health Monit

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“…Intensive vibrations may even cause immediate damage to the system. A known solution for that problem is to use passive control methods for damping these vibrations [1].…”

Section: Introductionmentioning

confidence: 99%

“…It is the structural motion itself that generates the forces in the dampers by imposing movement on the damper anchors. Essentially, passive control has four main advantages: (1) it is usually relatively inexpensive; (2) it consumes no external energy; (3) it is inherently stable; and (4) it works even during a major earthquake [2].…”

Section: Introductionmentioning

confidence: 99%

Optimal viscous dampers gains for structures subjected to earthquakes

Halperin

Ribakov

Agranovich

2015

Struct. Control Health Monit.

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SUMMARYPassive control is a known method for vibrations damping in civil structures. The simplicity and reliability of passive damping devices makes them a worthy candidate in many practical applications. However, despite of its practical simplicity, the optimal design of passive controller is quite a hard computational problem. In this work, an enhanced optimal viscous passive dampers design method is proposed for seismically excited structures. The optimization is carried out with relation to performance index that consists of an H 2 norm of the system and a quadratic gains norm. An algorithm is suggested for the look after a candidate optimum. It is based on Newton's optimization method with recently developed effective calculation method for the Hessian matrix. Numerical evaluation of the suggested method demonstrates a very fast convergence rate of the design algorithm and proves a performance effective dampers distribution.

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“…Several studies have been carried out in the field of response, optimization and design of structures equipped with passive dampers . Xia and Hanson studied two 10‐story frame structures with ADAS devices with different parameters to find out their performance under seismic loading.…”

Section: Introductionmentioning

confidence: 99%

“…The IPDs dissipate energy through three mechanisms: steel plastification, infilled metal plastification and friction between the infill and the steel pipes and cover plates. The IPDs add strength and stiffness to structures in addition to energy dissipation capability.Several studies have been carried out in the field of response, optimization and design of structures equipped with passive dampers [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Xia and Hanson [18] studied two 10-story frame structures with ADAS devices with different parameters to find out their performance under seismic loading.…”

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confidence: 99%

Seismic performance assessment of steel frames equipped with a novel passive damper using a new damper performance index

Mahjoubi

Maleki

2014

Struct. Control Health Monit.

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Summary Seismic response of steel moment‐resisting frames equipped with a novel passive damper called infilled‐pipe damper (IPD) is investigated in this study. The IPD is a very economical and easily assembled structural control device with high energy absorption, invented recently by the authors. A simplified trilinear load–displacement model for IPD devices is suggested to be used in this study and further investigations. Next, criteria for IPD elements size selection are proposed for passive control of structures against earthquake loads. Steel frame structures of 5, 10, and 20 stories are designed without any IPD devices. Then, the frames are equipped with IPDs of different stiffness. The frames are subjected to seven earthquake excitations scaled to design basis earthquake and maximum considered earthquake levels. Several response parameters including energy segments and normalized energy ratios are considered, and the performance of the IPDs in reducing each response is evaluated. A new damper performance index, considering global structural damage, local destructive damage and nonstructural damage in a single relationship, is suggested in this study. The index can be employed for optimization purposes in structures equipped with different types of dampers. The results show that the IPD devices dissipate a considerable portion of the seismic input energy and reduce the structural and nonstructural damages. Copyright © 2014 John Wiley & Sons, Ltd.

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Seismic control of regular and irregular buildings using viscoelastic passive dampers

Cited by 8 publications

References 8 publications

Rolling devices for seismic isolation of lightweight structures and equipment. Design and realization of a prototype

Rolling devices for seismic isolation of lightweight structures and equipment. Design and realization of a prototype

Optimal viscous dampers gains for structures subjected to earthquakes

Seismic performance assessment of steel frames equipped with a novel passive damper using a new damper performance index

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