Dynamic analysis of stacked rigid blocks

Spanos, Pol D.; Roussis, Panayiotis C.; Politis, Nikolaos

doi:10.1016/s0267-7261(01)00038-0

Cited by 107 publications

(101 citation statements)

References 30 publications

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“…From a theoretical point of view, the most common approach is that of the conservation of angular momentum, used in conjunction with the classical hypotheses of impulsive dynamics: infinitesimal duration of impact, no displacement during impact, instantaneous variation of velocity during impact (Housner 1963;Spanos et al 2001;De Lorenzis et al 2007;Sorrentino et al 2008b). This approach makes the estimation of energy damping possible for any mechanism for which the geometrical parameters are known.…”

Section: Introductionmentioning

confidence: 99%

The relevance of energy damping in unreinforced masonry rocking mechanisms. Experimental and analytic investigations

Sorrentino

AlShawa

Decanini

2011

Bull Earthquake Eng

104

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Existing unreinforced masonry buildings frequently suffer out-of-plane local collapse mechanisms when undergoing earthquake ground motion. The energy damping that occurs during the motion, due to impacts of a wall against the foundation or against other walls, is a relevant parameter on the response. An experimental investigation has been carried out to estimate the dissipation of kinetic energy that takes place during free oscillations. Restraint conditions allow for two-sided rocking (wall resting on a foundation) and one-sided rocking (wall resting on a foundation adjacent to transverse walls). Five specimens have been tested, modelling walls acted out-of-plane (fa double dagger ades). When one-sided rocking is under consideration, different depths of the contact surface between fa double dagger ade and transverse walls are considered. In the case of two-sided rocking, the experimental coefficient of restitution is slightly lower than the analytic coefficient. In the case of one-sided rocking, an analytic formulation is proposed and this is compared against experimental data. Although the coefficient of restitution of one-sided rocking is less than half that of two-sided rocking, it is not equal to zero. Thus, it cannot induce a sudden stop of the motion. Hence, nonlinear time history analyses performed under this assumption may prove unsafe. Moreover, a comparison has been carried out between overturning maps, induced by twenty natural accelerograms, computed for the analytic coefficient of restitution and those computed for the experimental coefficient of restitution. The increased energy dissipation reduces the frequency of overturning and causes a more regular behaviour

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Section: Introductionmentioning

confidence: 99%

The relevance of energy damping in unreinforced masonry rocking mechanisms. Experimental and analytic investigations

Sorrentino

AlShawa

Decanini

2011

Bull Earthquake Eng

104

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“…In this model, the masonry wall and the upper steel mass are indeed each more consistently represented by a block. The equations of motion implemented in the present model are based on the developments of Spanos et al [26]. Nevertheless, another linearization of these equations is applied and the adopted numerical scheme resorts to an event-driven strategy which principles are detailed in [32] and summarized as follows.…”

Section: Comparison With a Two Stacked Blocks Modelmentioning

confidence: 99%

“…Such structures can behave according to eight different configurations, as illustrated in Figure 1. Spanos et al [26] improved 760 these developments by adding different contributions to the transition criteria from one configuration to another and proposed an alternative method for the linearization of the nonlinear piecewise equations. Kounadis et al assessed the minimum amplitude ground excitation leading to the overturning instability [27].…”

Section: Introductionmentioning

confidence: 99%

Rocking Behaviour of Simple Unreinforced Load-Bearing Masonry Walls Including Soundproofing Rubber Layers

Mordant¹,

Denoël²,

Degée³

2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…In this way a plethora of researchers investigated the seismic response of rigid blocks and specifically ancient column in order to unveil the hidden aspects of their behavior. Seismic behavior of monolithic and multidrum columns have been thoroughly investigated both numerically and analytically [1][2][3][4][5][6][7][8][9]. Moreover, the influence of the epistyle mass on the rocking response of the colonnade has been examined by Makris and Vasiliou [10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Dynamic Response of Classical Column Standing Free on an Isolated Base

Kavvadias¹,

Bibo²,

Vasiliadis³

2017

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

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Dynamic analysis of stacked rigid blocks

Cited by 107 publications

References 30 publications

The relevance of energy damping in unreinforced masonry rocking mechanisms. Experimental and analytic investigations

The relevance of energy damping in unreinforced masonry rocking mechanisms. Experimental and analytic investigations

Rocking Behaviour of Simple Unreinforced Load-Bearing Masonry Walls Including Soundproofing Rubber Layers

Numerical Study on the Dynamic Response of Classical Column Standing Free on an Isolated Base

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