Rocking Resonance Conditions of Large and Slender Rigid Blocks Under the Intense Phase of an Earthquake

Casapulla, Claudia; Maione, Alessandra

doi:10.7712/120117.5612.17190

Cited by 4 publications

(5 citation statements)

References 32 publications

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“…Such a reduction influences the experimental value of the COR, which is even lower than the analytical one found by Housner [14], [15]. Indeed, the experimental COR for masonry rocking blocks results to be about 90-95% of the analytical value, since it may also take into account some local plastic deformations [28]For rectangular blocks, the analytical value is equal to 1-1.5 (sin2 , where measures the slenderness ratio of the block as the ratio of thickness to height (Figure 1). If the block is stocky, the slenderness ratio is the arctangent of the ratio of thickness to height.…”

Section: Remarks On the Energy Dissipation And On The Equivalent Dampingmentioning

confidence: 73%

Equivalence of Damping Properties of Dissipative Devices for Mitigating the Seismic Risk of Rigid Blocks

Giresini,

AlShawa,

Argiento

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Non-structural elements, such as infill walls, precast r.c., timber panels, machines, cabinets, art objects, etc. can be considered as rigid rocking blocks whose seismic vulnerability may be reduced by means of dissipative and recentering devices. These devices can be installed in different positions of the rigid block. This paper proposes an equivalence criterion to compare dashpots installed either at the base or at the top of rocking blocks in terms of damping coefficients. An analytical expression is obtained and validated through deterministic and stochastic approaches. The first aims to compare the two scenarios' performances, while the second introduces a probabilistic assessment in terms of fragility curves and seismic demand hazard. The comparisons exhibit an optimal agreement, making the analytical formulation reliable for design purposes.

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Section: Remarks On the Energy Dissipation And On The Equivalent Dampingmentioning

confidence: 73%

Equivalence of Damping Properties of Dissipative Devices for Mitigating the Seismic Risk of Rigid Blocks

Giresini,

AlShawa,

Argiento

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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show abstract

“…Due to seismic excitation silo walls are subjected to additional horizontal seismic actions caused by the acceleration of the mass of the granular material. These actions can be represented according to 65 Books MDPI Buildings 2017, 7,61 Eurocode 8, Part 4 [11], through an additional normal pressure on the wall, which for cylindrical silos is given by…”

Section: Equivalent Seismic Loads In Horizontal Directionmentioning

confidence: 99%

“…Casapulla et al [62,64,65] introduced an artificial limit accelerogram as a sequence of instantaneous Dirac impulses to represent the most unfavorable effects on the rocking block of the intense phase of an earthquake. A secondary sequence of intermediate impulses was also considered to reduce the resonance effects and to cover a broad range of conditions.…”

Section: Critical Impulse Input and Resonance Conditionsmentioning

confidence: 99%

Traditional and Innovative Approaches in Seismic Design

Giresini¹,

Taddei²

2018

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Section: Critical Impulse Input and Resonance Conditionsmentioning

confidence: 99%

Rocking and Kinematic Approaches for Rigid Block Analysis of Masonry Walls: State of the Art and Recent Developments

2017

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Abstract:The assessment of the rocking and overturning response of rigid blocks to earthquakes is a complex task, due to its high sensitivity to the input motion, variations in geometry and dissipation issues. This paper presents a literature review dealing with classical and advanced approaches on rocking motion with particular reference to masonry walls characterized by a monolithic behavior. Firstly, the pioneering work of Housner based on the concept of the inverted pendulum is discussed in terms of the most significant parameters, i.e., the size and slenderness of the blocks, the coefficient of restitution and ground motion properties. Free and restrained rocking blocks are considered. Then, static force-based approaches and performance-based techniques, mostly based on limit analysis theory, are presented to highlight the importance of investigating the evolution of the rocking mechanisms by means of pushover curves characterized by negative stiffness. From a dynamic perspective, a review of probabilistic approaches is also presented, evaluating the cumulative probability of exceedance of any response level by considering different earthquake time histories. Some recent simplified approaches based on the critical rocking response and the worst-case scenario are illustrated, as well.

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Rocking Resonance Conditions of Large and Slender Rigid Blocks Under the Intense Phase of an Earthquake

Abstract: Abstract. A simplified approach is proposed in this paper

Cited by 4 publications

References 32 publications

Equivalence of Damping Properties of Dissipative Devices for Mitigating the Seismic Risk of Rigid Blocks

Equivalence of Damping Properties of Dissipative Devices for Mitigating the Seismic Risk of Rigid Blocks

Traditional and Innovative Approaches in Seismic Design

Rocking and Kinematic Approaches for Rigid Block Analysis of Masonry Walls: State of the Art and Recent Developments

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