Earthquake-induced poundings of a seismically isolated building with adjacent structures

Polycarpou, Panayiotis C.; Komodromos, Petros

doi:10.1016/j.engstruct.2010.03.011

Cited by 99 publications

(64 citation statements)

References 20 publications

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“…3 STRUCTURAL POUNDING OF BASE-ISOLATED BUILDINGS Next, selected results from parametric analyses that have been conducted to investigate earthquake-induced pounding of a base-isolated building with both the surrounding moat wall and other adjacent buildings [12] are presented.…”

Section: 22mentioning

confidence: 99%

“…A four-storey base-isolated building [12], assuming a shear beam behaviour for its superstructure (with a horizontal stiffness of 600 MN/m of each storey, lumped masses of 320 tons at each floor, except of the top floor with 250 tons) and a seismic isolation system simulated with a bilinear inelastic model (K elastic = 200 MN/m, K postyield = 25 MN/m and F yi /W tot = 0.1) is considered in six different configurations: standing alone and surrounded by both the moat wall and adjacent fixed-supported buildings, with the same storey-stiffness and floor masses as the superstructure of the seismically isolated building, but with five different numbers (2 to 6) of stories in height. Both cases of pounding of the base-isolated building against the surrounding moat wall and against either the moat wall (at the isolation level) or the adjacent buildings (at the levels of the upper floors of their superstructures) are considered.…”

Section: Modelling and Simulation Assumptionsmentioning

confidence: 99%

See 1 more Smart Citation

Computer-aided investigation of special issues of the response of seismically isolated buildings

Mavronicola¹,

Polycarpou²,

Papaloizou³

et al. 2015

Int. J. CMEM

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This paper presents indicative results from the numerical investigation of two special issues of the seismic behaviour of base-isolated buildings, using custom-made software that utilizes modern objectoriented design approaches. The first issue concerns the modelling of the nonlinear behaviour of seismic isolation systems, focusing on the lead rubber bearings (LRBs), which are among the most commonly used seismic isolation systems. In particular, the inaccuracies between the actual behaviour of the LRBs, which can be more precisely represented by the Bouc-Wen model, and the usage of a bilinear inelastic model, which is often used in practice, are assessed through numerical simulations and parametric analyses. The second issue concerns potential pounding of base-isolated buildings with adjacent structures, when the available clearance around a seismically isolated building is limited, during very strong earthquakes. The consequences of potential pounding and the influence of certain parameters on the overall seismic response of base-isolated buildings are also assessed through numerical simulations and parametric analyses using custom-made software.

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Section: 22mentioning

confidence: 99%

Section: Modelling and Simulation Assumptionsmentioning

confidence: 99%

Computer-aided investigation of special issues of the response of seismically isolated buildings

Mavronicola¹,

Polycarpou²,

Papaloizou³

et al. 2015

Int. J. CMEM

View full text Add to dashboard Cite

show abstract

“…Compared to the extensive research work on pounding of conventional buildings and bridges, very limited research studies have been carried out for pounding of seismically isolated buildings [19]. [23] simulated the superstructure of an isolated building as a continuous shear beam in order to investigate the effects of pounding on structural response.…”

Section: Mohammedismail@upcedumentioning

confidence: 99%

Hybrid RNC-isolation of structures under near-fault earthquakes

Ismail

Pozo

Rodellar

2012

2012 American Control Conference (ACC)

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Abstract-The problem of combining active damping with a purely passive isolation system, with hysteretic damping, to reduce possible pounding effects under near-fault ground motions is addressed. The used isolation system is a recently proposed one that is referred to as roll in cage (RNC) isolator. It has an integrated buffer mechanism to prevent excessive bearing displacements under strong seismic excitations. Therefore, possible pounding under such strong earthquakes will be within the bounds of RNC isolator to avoid adjacent structural pounding. Active control is invoked at a certain bearing displacement to reduce it before reaching its design limit, after which pounding takes place. It was found that increasing the RNC isolator's inherent hysteretic damping reduces the bearing displacement and consequently alleviates or even eliminate pounding. Moreover, the integration of active control, at smaller bearing displacements, with the RNC isolator can reduce the bearing displacement but adds more rigidity to the isolation system, which leads to less efficient isolation.

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“…Through parametric analysis, Komodromos et al studied the effects of pounding of a seismically isolated building with the surrounding retaining wall [14,15], revealing the damaging effects of structural impact on the effectiveness of seismic isolation. The pounding of an isolated building with adjacent structures was studied in [16]. It was found that if a sufficient gap is provided, with which pounding with the surrounding moat wall at the base of the building could be avoided, this does not ensure that the building will not eventually collide with neighboring buildings due to the deformations of their superstructures.…”

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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Earthquake-induced poundings of a seismically isolated building with adjacent structures

Cited by 99 publications

References 20 publications

Computer-aided investigation of special issues of the response of seismically isolated buildings

Computer-aided investigation of special issues of the response of seismically isolated buildings

Hybrid RNC-isolation of structures under near-fault earthquakes

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

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