Rocking response and overturning criteria for free standing rigid blocks to single—lobe pulses

Voyagaki, Elia; Psycharis, Ioannis N.; Mylonakis, George

doi:10.1016/j.soildyn.2012.11.010

Cited by 70 publications

(48 citation statements)

References 24 publications

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“…These studies showed that, in contrast with the response to a single pulse, the response to more irregular but simplified accelerograms is very sensitive to the geometrical parameters of the block, as well as to the details of ground motions and the coefficient of restitution. These results allowed increased attention to various sorts of impulses or harmonic shaking and to relationships between pulses magnitude and toppling [58][59][60][61].…”

Section: Free-vibrations Harmonic Pulses and Real Accelerogramsmentioning

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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Section: Free-vibrations Harmonic Pulses and Real Accelerogramsmentioning

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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“…The position of the centre of mass, G, is shown in the drawing on the right in Figure 4, where hG=1190 mm is the height of G from the base section and bG=150 mm is the distance of the vertical projection of G from the nearest side of the base section in plan. A rocking-sliding model corresponding to the basic analytical and numerical simulation of the dynamic phenomenon (Shenton and Jones, 1991;Makris and Cameron, 2001;Caliò and Marletta, 2003;Borri and Grazini, 2006;Sorace and Terenzi, 2007;Baratta and Corbi, 2012;Chatzis and Smyth, 2012;Voyagaki et al 2013) was implemented for the development of the time-history analyses. As detailed in Figure 5, within this model rocking is simulated by means of a set of vertical "gap" (no-tension) interface elements linking the joints of the bottom section of the pedestal to the ground.…”

Section: Modelling Of Rocking and Sliding Effectsmentioning

confidence: 99%

Modelling of Rocking and Sliding Effects in the Seismic Analysis of a Free-Standing Column

Sorace

Terenzi

Bitossi

et al. 2017

Lat. Am. j. solids struct.

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A study on the seismic response of a free-standing marble column, including rocking and sliding effects, is presented in this paper. The rocking-sliding model implemented for the development of the analyses corresponds to the basic theoretical and numerical simulation of the dynamic phenomenon. The assessment procedure adopted for the application of the model to the non-linear dynamic incremental time-history investigation is checked by comparison with simplified rigid body-based analytical predictions of the rockingonset response acceleration and the overturning critical velocity. The results show a high seismic vulnerability of the column, as identified by severe damage at the basic design earthquake level, and an overturning-related near-collapse response at the maximum considered earthquake level.

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“…We note that the geometrically nonlinear soil-structure interaction has been studied in the past, see for instance (Kennedy et al, 1976;Nakamura et al, 2010Nakamura et al, , 2007. The concept of rocking spectra is used herein and has been extrapolated from other systems exposed to seismic risk such as base-isolated generic structures (Politopoulos, 2010), bridges (Anastasopoulos et al, 2013), masonry walls (Costa et al, 2013) or even laboratory and hospital equipment A c c e p t e d M a n u s c r i p t (Cosenza et al, 2014;Konstantinidis and Makris, 2009), free-standing blocks (Dimitrakopoulos and DeJong, 2012;Voyagaki et al, 2013) and monuments (Makris and Vassiliou, 2013).…”

Section: Introductionmentioning

confidence: 99%

Seismically induced uplift effects on nuclear power plants. Part 1: Containment building rocking spectra

Sextos

Manolis

Athanasiou

et al. 2017

Nuclear Engineering and Design

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. focusing primarily on the response of the containment structure of a nuclear power plant.However, in current state-of-practice and in most seismic regulations worldwide, the consideration of soil-structure interaction and potential development of geometrically nonlinear effects, such as rocking and sliding with uplift, is not taken into consideration. To explore this issue, a refined 3Dfinite element model of a typical nuclear power plant containment structure is developed, comprising solid elements for the soil and foundation, plus shell elements for the structure. The aim is identification of foundation-soil separation phenomena under a suite of ground motions with distinct frequency content. At first, harmonic excitations are used, for both cases of stiff sand and rock subsoil profiles, leading to rocking spectra that depict the displacement demand in connection with nonlinear separation. Clear influence zones can be distinguished, especially in the low frequency bands for the stiff sand case. Next, three subsets of 30 ground motion records are carefully selected and grouped in ensembles according to their frequency content, normalized to a PGA of 0.36g, which corresponds to the highest design acceleration in Europe. Ground motions with low mean frequency content are observed to lead to the onset of geometrically nonlinear phenomena, along with a higher displacement demand. The interplay between ground motion characteristics, dynamic properties of the containment structure and stiffness of the soil is also highlighted. More specifically, it is shown that stiff containment structures on soft soils are more prone to foundation uplift. This possibility is often neglected in design codes and the consequence is that under certain circumstances, damage may be caused to the internal power generation equipment..

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Rocking response and overturning criteria for free standing rigid blocks to single—lobe pulses

Cited by 70 publications

References 24 publications

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

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

Modelling of Rocking and Sliding Effects in the Seismic Analysis of a Free-Standing Column

Seismically induced uplift effects on nuclear power plants. Part 1: Containment building rocking spectra

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