Seismic Upgrading of a Historical Masonry Bell Tower through an Internal Dissipative Steel Structure

Pavia, Arianna; Scozzese, Fabrizio; Petrucci, Enrica; Zona, Alessandro

doi:10.3390/buildings11010024

Cited by 18 publications

(7 citation statements)

References 78 publications

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“…To cope with this issue, an average period, T, between the transversal (1.15 s) and longitudinal vibration (0.67 s) modes is considered in this study. In order to account for the bidirectional nature of the seismic input (X and Y directions), the maximum spectral acceleration component at the period T is selected as the conditioning parameter [38,39], i.e., IM = max{S a,X (T), S a,Y (T)}.…”

Section: Probabilistic Tools For the Proposed Methodologymentioning

confidence: 99%

Innovative Fragility-Based Method for Failure Mechanisms and Damage Extension Analysis of Bridges

Minnucci¹,

Scozzese

Carbonari

et al. 2022

Infrastructures

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The seismic assessment of existing bridges is of the utmost importance to characterise the main structural deficiencies, estimate the risk, prioritise retrofit interventions, or estimate losses and repair costs in case of earthquakes. The above tasks require information on the damage mechanisms likely to occur as well as on the damage extent over the structure. Such types of information are generally not provided by classical fragility analysis, which is mainly focused on the evaluation of the global performance of the bridge. In this paper, a systematic probabilistic methodology for the evaluation of bridge fragility is proposed. The methodology aims at offering insight into the failure mechanisms most likely to occur and the evolution and extent of damage within the bridge structure. First, a mathematical description of the proposed analysis methods is given, then an application to a realistic case study—a reinforced concrete multi-span simply supported deck link-slab bridge—is provided to illustrate the applicability of the tool. A nonlinear 3D finite element model is developed, and a multiple-stripe (nonlinear dynamic) analysis is performed by using a stochastic bidirectional seismic input. The results highlight the suitability of the proposed methodology to reveal the main structural deficiencies, the relations among different failure mechanisms (involving piers, bearings, abutments, etc.), and the expected damage extent.

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Section: Probabilistic Tools For the Proposed Methodologymentioning

confidence: 99%

Innovative Fragility-Based Method for Failure Mechanisms and Damage Extension Analysis of Bridges

Minnucci¹,

Scozzese

Carbonari

et al. 2022

Infrastructures

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“…Te concept of control applications for improving the seismic performance of structures has been considered for several years. Passive supplemental damping strategies are well known and widely accepted by engineers for mitigating the efects of dynamic loading on structures [1][2][3][4]. However, preliminary studies indicate that appropriately implemented semiactive systems perform signifcantly better than passive devices and have the potential to achieve most of the performance outcomes of fully active systems.…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological Fluid Dampers: A Close Look at Efficient Parametric Models

Bahar,

Pozo,

Meybodi

et al. 2024

Structural Control and Health Monitoring

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The reasonable efficiency, high reliability, and minimal maintenance requirements of the semiactive control algorithms make this form of structural control the most successful method from a practical point of view. In addition, significant progress has been made in structural control devices. Magnetorheological (MR) dampers have been the subject of extensive research. In order to develop and implement a successful structural control algorithm, a deep understanding of their operation is required. Therefore, many efforts have been made to classify MR dampers as efficient tools; however, their complicated behavior has also been noted. Various relations have been proposed to describe the highly nonlinear behavior of MR dampers. To develop an efficient control algorithm, one must first properly understand the seismic behavior of the structure and the control device as well as its handling. The handling of the device will be efficient if there is a description for its control, a so-called inverse model. This model is an answer to the question of whether the proposed device model can be written in a form that practically brings the generated damping force as close as possible to the desired force. In the identification process, the selection of a basic mathematical model is critical. In this review article, we have compiled successful parametric models that accurately replicate the behavior of MR dampers. Since the primary functionality of the device is crucial for the development of a competent control algorithm, we have endeavored to investigate and present the reversibility of the proposed models. We also delved at the characteristics of the parameters that enable precise communication between the central control unit and the device. These parameters, which enable the dialog between the processing unit and the control devices, will play an important role in the development of the inverse model in its simplicity and efficiency.

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“…Evidence, in some cases, of constructions with an intention to resist seismic activity in areas of high seismicity by incorporation of timber and steel elements in the walls can be found only locally [18][19][20][21][22][23], but, even in these cases, not following a rational design. Sophisticated techniques involving dynamic monitoring allow an estimation of the actual state of masonry buildings and towers [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Stochastic Dynamic Analysis of Cultural Heritage Towers up to Collapse

Kouris

Konstantinidis

et al. 2021

Buildings

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This paper deals with the seismic vulnerability of monumental unreinforced masonry (URM) towers, the fragility of which has not yet been sufficiently studied. Thus, the present paper fills this gap by developing models to investigate the seismic response of URM towers up to collapse. On mount Athos, Greece, there exist more than a hundred medieval towers, having served mainly as campaniles or fortifications. Eight representative towers were selected for a thorough investigation to estimate their seismic response characteristics. Their history and architectural features are initially discussed and a two-step analysis follows: (i) limit analysis is performed to estimate the collapse mechanism and the locations of critical cracks, (ii) non-linear explicit dynamic analyses are then carried out, developing finite element (FE) simulations, with cracks modelled as interfacial surfaces to derive the capacity curves. A meaningful definition of the damage states is proposed based on the characteristics of their capacity curves, with the ultimate limit state related to collapse. The onset of slight damage-state is characterised by the formation and development of cracks responsible for the collapse mechanism of the structure. Apart from these two, another two additional limit states are also specified: the moderate damage-state and the extensive one. Fragility and vulnerability curves are finally generated which can help the assessment and preservation of cultural heritage URM towers.

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Seismic Upgrading of a Historical Masonry Bell Tower through an Internal Dissipative Steel Structure

Cited by 18 publications

References 78 publications

Innovative Fragility-Based Method for Failure Mechanisms and Damage Extension Analysis of Bridges

Innovative Fragility-Based Method for Failure Mechanisms and Damage Extension Analysis of Bridges

Magnetorheological Fluid Dampers: A Close Look at Efficient Parametric Models

Stochastic Dynamic Analysis of Cultural Heritage Towers up to Collapse

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