Seismic response of base-isolated structures during impact with adjacent structures

Matsagar, Vasant; Jangid, R. S.

doi:10.1016/s0141-0296(03)00081-6

Cited by 106 publications

(64 citation statements)

References 16 publications

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“…The majority of those research works simulate the problem in two-dimensions [1][2][3][4][5][6][7][8][9], in an attempt to avoid the complexities associated with the 3D nature of the problem and the consequently excessive computational cost. However, the effect of crucial factors, which may excite the torsional vibration of a building and further increase the possibility of impacts during earthquakes, can be taken into consideration only through 3D simulations.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ground Motion Directionality on Seismic Response of Base-Isolated Buildings Considering Pounding to Adjacent Structures

Mavronicola¹,

Komodromos²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Introductionmentioning

confidence: 99%

Effect of Ground Motion Directionality on Seismic Response of Base-Isolated Buildings Considering Pounding to Adjacent Structures

Mavronicola¹,

Komodromos²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…The superstructure was idealized as a rigid shear beam structure colliding on an adjacent retaining wall modeled as a spring element. Matsagar and Jangid (2003) investigated the seismic pounding of a multi-story building supported on various base isolation systems during impact with adjacent structures, while impacts were assumed to happen only at the base of the building with the moat wall. Komodromos et al (2007) and Komodromos (2008) investigated, through parametric studies, the effects of poundings of a base-isolated building with the surrounding moat wall, revealing the potentially detrimental effects of structural impact on the effectiveness of seismic isolation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Planar Impact Modeling on the Pounding Response of Base-Isolated Buildings

Mavronicola

Polycarpou

Komodromos

2016

Front. Built Environ.

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During strong earthquake excitations, base-isolated buildings may collide, either with the surrounding moat wall or with adjacent buildings if the available clearance is exceeded. This undesirable possibility has been recently investigated by several researchers, adopting various types of force-based impact models. Evidently, an important issue that arises regarding such numerical studies is the way of taking into account potential impacts. This paper parametrically investigates the effects of impact modeling characteristics on the computed overall peak response of a base-isolated building that experiences structural pounding. Specifically, the Kelvin-Voigt impact model and various other modifications of this linear viscoelastic impact model are considered in the conducted analyses. In order to efficiently conduct this investigation, a specially developed software is used. The results indicate that the excitation's and isolator's characteristics do not significantly influence the variation in the normalized peak response of the superstructure. In contrast, the impact parameters can have a significant effect on the superstructures' peak accelerations with overestimations up to 70%. In general, the normalized peak response ratios of the interstory drifts tend to increase as the available seismic gap and the coefficient of restitution decrease, although the magnitude of the deviations is within 5%, which can be considered insignificant.

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“…Similar work was done by Malhotra [11], where it was found that the base shear forces increase with the stiffness of the isolated structure or the surrounding retaining wall. The seismic response of multi-story building supported on various base isolation systems during impact with adjacent structures was studied by Matsagar and Jangid [12]. It was observed that superstructure acceleration increases with the increase of the isolation gap up to a certain value and then the acceleration decreases with further increase of gap, and the effects of impact are found to be severe for the system with flexible superstructure, increased number of stories and greater stiffness of the adjacent structure.…”

Section: Introductionmentioning

confidence: 99%

Passive and hybrid mitigation of potential near-fault inner pounding of a self-braking seismic isolator

Ismail

Rodellar

Pozo

2015

Soil Dynamics and Earthquake Engineering

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a b s t r a c tA seismic isolated structure is usually a long-period structural system, which may encounter a lowfrequency resonance problem when subjected to a near-fault earthquake that usually has a long-period pulse-like waveform. This long-period wave component may result in an enlargement of the base displacement and a decrease of the isolation efficiency. To overcome this problem, a rolling-based seismic isolator, referred to as roll-n-cage (RNC) isolator, has been recently proposed. The RNC isolator has a built-in buffer (braking) mechanism that limits the peak isolator displacements under severe earthquakes and prevents adjacent structural pounding. This paper addresses the problem of passive and hybrid mitigation of the potential inner pounding of the self-braking RNC isolator under near-fault earthquakes. Numerical results show that the RNC isolator can intrinsically limit the isolator displacements under near-fault earthquakes with less severe inner pounding using additional hysteretic damping and active control forces.

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Seismic response of base-isolated structures during impact with adjacent structures

Cited by 106 publications

References 16 publications

Effect of Ground Motion Directionality on Seismic Response of Base-Isolated Buildings Considering Pounding to Adjacent Structures

Effect of Ground Motion Directionality on Seismic Response of Base-Isolated Buildings Considering Pounding to Adjacent Structures

Effect of Planar Impact Modeling on the Pounding Response of Base-Isolated Buildings

Passive and hybrid mitigation of potential near-fault inner pounding of a self-braking seismic isolator

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