Response of rigid body assemblies to dynamic excitation

Winkler, Tibor; Meguro, Kimiro; Yamazaki, Fumio

doi:10.1002/eqe.4290241008

Cited by 73 publications

(52 citation statements)

References 8 publications

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“…The friction parameters are varied. For high enough friction, the onset of rocking occurs almost independently of the friction, but depends mainly on the aspect ratio l L , corroborating previous results [57]. For small enough friction, however, there exists a minimum aspect ratio l L under which the onset of rocking starts to depend a lot on friction.…”

Section: Onset Of Rocking With Harmonic Base Excitationsupporting

confidence: 80%

Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data

2013

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This paper concerns the dynamics of planar rocking blocks, which are mechanical systems subject to two unilateral constraints with friction. A recently introduced multiple impact law that incorporates Coulomb friction is validated through comparisons between numerical simulations and experimental data obtained elsewhere by other authors. They concern the free-rocking motion with no base excitation, and motions with various base excitations for the study of the onset of rocking and of the overturning phenomenon. The comparisons made for free-rocking and for the onset of rocking demonstrate that the proposed impact model allows one to correctly predict the block motions. Especially the free-rocking experiments can be used to fit the impact law parameters (restitution and friction coefficients, block width). The free-rocking fitted parameters are then used in the excited-base cases.

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Section: Onset Of Rocking With Harmonic Base Excitationsupporting

confidence: 80%

Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data

2013

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“…The blocks are separated by joint interfaces, along which the blocks can detach or slide without limit on relative displacement or rotation. Because of these features, DEM is particular suitable for analysing the dynamic behaviour of rocking masonry structures; past studies include investigation of the seismic behaviour of single blocks or block assemblages [21,22,25], masonry arches [23,24], masonry facades [25,26], free-standing columns [27,28] and entire historical structures [29,30].…”

Section: Discrete Element Modellingmentioning

confidence: 99%

Influence of boundary conditions on the out‐of‐plane response of brick masonry walls in buildings with RC slabs

Tondelli

Beyer

DeJong

2016

Earthq Engng Struct Dyn

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SUMMARYIn modern unreinforced masonry buildings with stiff RC slabs, walls of the top floor are most susceptible to out-of-plane failure. The out-of-plane response depends not only on the acceleration demand and wall geometry but also on the static and kinematic boundary conditions of the walls. This paper discusses the influence of these boundary conditions on the out-of-plane response through evaluation of shake table test results and numerical modelling. As a novum, it shows that the in-plane response of flanking elements, which are orthogonal to the wall whose out-of-plane response is studied, has a significant influence on the vertical restraint at the top of the walls. The most critical configuration exists if the flanking elements are unreinforced masonry walls that rock. In this case, the floor slabs can uplift, and the out-of-plane loadbearing walls loose the vertical restraint at the top. Numerical modelling confirms this experimentally observed behaviour and shows that slab uplift and the difference in base and top excitation have a strong influence on the out-of-plane response of the walls analysed.

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“…For example, previous studies [1][2][3] showed that the distinct element method seems to be an e cient tool in predicting the response satisfactorily. However, veriÿcation and calibration of the main parameters, especially the joint properties, is necessary, before such a numerical method can be used in the restoration process of a classical monument.…”

Section: Introductionmentioning

confidence: 98%

Experimental investigation of the earthquake response of a model of a marble classical column

Mouzakis

Psycharis

Papastamatiou

et al. 2002

Earthq Engng Struct Dyn

125

112

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SUMMARYExperimental results concerning the earthquake response of a marble model of a classical column are reported herein. The model was a 1:3 scale replica of a column of the Parthenon on the Acropolis of Athens, made from the same material as the original. Several earthquake motions, scaled appropriately in order to cause signiÿcant rocking but no collapse of the column, were used as the excitation. The base motion was applied in plane (in one horizontal and the vertical direction) or in space (in two horizontal and the vertical direction), using the shaking table facility at the Laboratory for Earthquake Engineering of the National Technical University of Athens. It was found that the column might undergo large deformations during the shaking, which are not necessarily re ected by the residual displacements at the end of it. For planar excitations, signiÿcant out-of-plane displacements can happen, triggered by the inevitable imperfections of the specimen. It was also veriÿed that the response is very sensitive, even to small changes of the geometry or the input motion parameters. For this reason, the experiments were not repeatable and 'identical' experiments produced di erent results.

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Response of rigid body assemblies to dynamic excitation

Cited by 73 publications

References 8 publications

Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data

Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data

Influence of boundary conditions on the out‐of‐plane response of brick masonry walls in buildings with RC slabs

Experimental investigation of the earthquake response of a model of a marble classical column

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