A nonlinear impact model for simulating the use of rubber shock absorbers for mitigating the effects of structural pounding during earthquakes

Polycarpou, Panayiotis C.; Komodromos, Petros; Polycarpou, Anastasis C.

doi:10.1002/eqe.2194

Cited by 81 publications

(53 citation statements)

References 15 publications

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“…In general, the bilinear model underestimates the The detrimental effects of pounding are more pronounced when the neighbouring fixed-supported structures, to the base-isolated building, are in resonance with the seismic excitation and the SRSS method for the estimation of the required separation distance between a base-isolated building and its adjacent fixed-supported buildings may not be sufficient. Based on this observation, additional practical measures for mitigating the detrimental effects of earthquake-induced pounding, such as the usage of rubber shock-absorbers [13,14], might be considered.…”

Section: Selected Simulation Resultsmentioning

confidence: 99%

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: Selected Simulation Resultsmentioning

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

“…Pounding between neighbouring, inadequately separated buildings with different structural properties during earthquakes is another issue that has recently attracted considerable interest (see, for example, Anagnostopoulos 1988;Maison and Kasai 1992;Karayannis and Favvata 2005;Mahmoud et al 2008;Anagnostopoulos and Karamaneas 2008;Jankowski 2009Jankowski , 2010Jankowski , 2012Dimitrakopoulos et al 2009;Mahmoud and Jankowski 2010;Polycarpou and Komodromos 2010a,b;Cole et al 2010;Polycarpou et al 2013;Efraimiadou et al 2012). However, most of the studies on earthquake-induced structural pounding were conducted under the assumption that the foundation is rigid.…”

Section: Introductionmentioning

confidence: 99%

Earthquake-induced pounding between equal height multi-storey buildings considering soil-structure interaction

Mahmoud

Abd-Elhamed

Jankowski

2013

Bull Earthquake Eng

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The present paper investigates the coupled effect of the supporting soil flexibility and pounding between neighbouring, insufficiently separated equal height buildings under earthquake excitation. Two adjacent three-storey structures, modelled as inelastic lumped mass systems with different structural characteristics, have been considered in the study. The models have been excited using a suit of ground motions with different peak ground accelerations and recorded at different soil types. A nonlinear viscoelastic pounding force model has been employed in order to effectively capture impact forces during collisions. Spring-dashpot elements have been incorporated to simulate the horizontal and rotational movements of the supporting soil. The results of the numerical simulations, in the form of the structural nonlinear responses as well as the time-histories of energy dissipated during pounding-involved vibrations, are presented in the paper. In addition, the variation in storeys peak responses and peak dissipated energies for different gap sizes are also shown and comparisons are made with the results obtained for colliding buildings with fixed-base supports. Observations regarding the incorporation of the soil-structure interaction and its effect on the responses obtained are discussed. The results of the study indicate that the soil-structure interaction significantly influences the pounding-involved responses of equal height buildings during earthquakes, especially the response of the lighter and more flexible structure. It has been found that the soil flexibility decreases storey peak displacements, peak impact forces

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“…Investigations on the dynamic characteristics and seismic response of adjacent structures connected by fluid dampers were conducted by Zhang and Xu (2000), Yang et al (2003) and Zhu and Xu (2005). Another technique concerns installation of bumpers, shock absorbers or collision shear walls which can help in preventing sudden shocks due to collisions (Anagnostopoulos and Spiliopoulos 1992;Anagnostopoulos 1996;Anagnostopoulos and Karamaneas 2008;Polycarpou et al 2013;Abdel Raheem 2014).…”

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confidence: 99%

Linking of adjacent three-storey buildings for mitigation of structural pounding during earthquakes

Jankowski

Mahmoud

2016

Bull Earthquake Eng

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The reports after major earthquakes indicate that the earthquake-induced pounding between insufficiently separated buildings may lead to significant damage or even total collapse of structures. An intensive study has recently been carried out on mitigation of pounding hazards so as to minimize the structural damages or prevent collisions at all. The aim of this paper is to investigate the effectiveness of the method when two adjacent three-storey buildings with different (substantially different) dynamic properties are connected at each storey level by link elements (springs, dashpots or viscoelastic elements). The results of the study indicate that connecting the structures by additional link elements can be very beneficial for the lighter and more flexible building. The largest decrease in the response of the structure has been obtained for links with large stiffness or damping values, which stands for the case when two buildings are fully connected and vibrate in-phase. Moreover, by comparing the effectiveness of different types of link elements, it has been confirmed that the use of viscoelastic elements reduces the peak displacement of the structure at lower stiffness and damping values comparing to the case when spring and dashpot elements are applied alone. On the other hand, the results of the study demonstrate that applying the additional link elements does not really change the response of the heavier and stiffer building. The final conclusion of the study indicates that linking two buildings allows us to reduce the in-between gap size substantially while structural pounding can be still prevented.

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A nonlinear impact model for simulating the use of rubber shock absorbers for mitigating the effects of structural pounding during earthquakes

Cited by 81 publications

References 15 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

Earthquake-induced pounding between equal height multi-storey buildings considering soil-structure interaction

Linking of adjacent three-storey buildings for mitigation of structural pounding during earthquakes

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