Deterministic and Probabilistic Serviceability Assessment of Footbridge Vibrations due to a Single Walker Crossing

Demartino, Cristoforo; Avossa, Alberto Maria; Ricciardelli, Francesco

doi:10.1155/2018/1917629

Cited by 15 publications

(18 citation statements)

References 49 publications

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“…The pedestrian‐induced vertical vibrations of a single‐span footbridge are here considered. In agreement with previous studies (e.g., Bachmann, 1995; Caprani et al., 2012; Demartino et al., 2018; Van Nimmen et al., 2017; Živanović et al., 2005), the footbridge is modeled as a simply supported beam with uniform mass distribution and linear viscous damping, whose dynamics is dominated by the first vertical mode of vibration (see Figure 1).…”

Section: Analysis Of Footbridges Under Pedestrian‐induced Vertical Vi...supporting

confidence: 87%

Feasibility of energy harvesting from vertical pedestrian‐induced vibrations of footbridges for smart monitoring applications

Demartino

Quaranta

Maruccio

et al. 2021

Computer aided Civil Eng

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The present work is meant at contributing to the innovation of the current methodologies for pedestrian bridge monitoring. Specifically, the use of vibrational energy harvesters for self‐powered wireless structural monitoring of footbridges is here advanced for the first time, and a novel sensorless strategy is also proposed to survey remotely their serviceability conditions. In this perspective, comprehensive computer‐aided numerical investigations are initially conducted to obtain statistical estimates of the electrical energy generated from a composite piezoelectric cantilever beam subjected to the vertical footbridge response under the passage of walkers. In doing so, randomness related to the pedestrians' dynamics and footbridges with different modal features are taken into account. An investigation based on experimental data is finally presented. In detail, one case study is concerned with a footbridge prone to large vibrations due to quasi pedestrian–structure resonance condition while the second one deals with a stiffer footbridge experiencing low excitation levels. Ultimately, this study indicates that energy harvesting from vertical pedestrian‐induced vibrations can be a promising strategy for footbridges monitoring, and it provides useful design guidelines in this regard.

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Section: Analysis Of Footbridges Under Pedestrian‐induced Vertical Vi...supporting

confidence: 87%

Feasibility of energy harvesting from vertical pedestrian‐induced vibrations of footbridges for smart monitoring applications

Demartino

Quaranta

Maruccio

et al. 2021

Computer aided Civil Eng

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“…(11a), the empirical Cumulative Distribution Function (CDF) of the tower base absolute maximum bending moment M, due to the wind action, is fitted to the Generalized Extreme Value (GEV) distribution. A similar probabilistic estimation in terms of GEV distribution was carried for the case of the peak acceleration induced by walkers on a pedestrian bridge [36]. As expected, the values of the bending moment increase with the operational wind speed up to the rated value and then decrease with further increasing of the wind speed up to the cut-out condition.…”

Section: Probabilistic Assessment Of the Peak Responsementioning

confidence: 61%

Assessment of the Peak Response of a 5MW HAWT Under Combined Wind and Seismic Induced Loads

Avossa¹,

Demartino²,

Ricciardelli³

2017

TOBCTJ

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Background and Objective:The rapid growth of the wind energy industry has brought the construction of large-scale wind turbines with the aim of increasing their performance and profits to areas characterized by high seismic hazard. Previous research demonstrated the seismic vulnerability of large-scale wind turbines when seismic and wind actions are considered simultaneously in the demand model. In this study, the response of the supporting structure of a land-based horizontal axis wind turbine under the combined effects induced by wind and earthquake is presented.Method:Using a decoupled approach, numerical simulations of the wind and seismic loads effects are performed separately using a specific model for the aerodynamic damping and then joined. Both simulations are done using free open-source software that are FAST simulating the aerodynamic response of the rotor and OpenSees simulating the dynamic behaviour of the tower. The fitted generalized extreme value distributions of the multi-hazard peak response in terms of base moment and shear, total drift, and top rotation are calculated for different seismic and wind load intensities by means of Monte Carlo simulations. The analyses are referred to the specific case study of a land-based wind generator.Results and Conclusion:The maximum demand is associated with the operational rated scenario and for high values of the peak ground acceleration, only the parked condition leads to larger values of the response if compared to others. The analyses showed that it is essential to consider the combined seismic and wind actions in the demand model to derive a complete multi-risk analysis of the land-based structures.

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“…The substructure damping characteristics [ sub ] can be considered by including in the model viscous dampers placed between the top of the columns (abutments or piers) and a fixed external support along the two main directions and . It is well known that different values of the damping can strongly affect the dynamic response [55][56][57][58][59]. Thus, the evaluation of the corresponding damping constants A/P is carried out assuming that the columns behave like SDOF systems along each principal direction:…”

Section: Seismic Bridge Response and Structural Evaluationmentioning

confidence: 99%

Seismic Retrofit of a Multispan Prestressed Concrete Girder Bridge with Friction Pendulum Devices

Avossa

Giacinto

Malangone

et al. 2018

Shock and Vibration

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The paper deals with the proposal and application of a procedure for the seismic retrofit of an existing multispan prestressed concrete girder bridge defined explicitly for the use of friction pendulum devices as an isolation system placed between piers top and deck. First, the outcomes of the seismic risk assessment of the existing bridge, performed using an incremental noniterative Nonlinear Static Procedure, based on the Capacity Spectrum Method as well as the Inelastic Demand Response Spectra, are described and discussed. Then, a specific multilevel design process, based on a proper application of the hierarchy of strength considerations and the Direct Displacement-Based Design approach, is adopted to dimension the FPD devices. Furthermore, to assess the impact of the FPD nonlinear behaviour on the bridge seismic response, a device model that reproduces the variation of the normal force and friction coefficient, the bidirectional coupling, and the large deformation effects during nonlinear dynamic analyses was used. Finally, the paper examines the effects of the FPD modelling parameters on the behaviour of the retrofitted bridge and assesses its seismic response with the results pointing out the efficiency of the adopted seismic retrofit solution.

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Deterministic and Probabilistic Serviceability Assessment of Footbridge Vibrations due to a Single Walker Crossing

Cited by 15 publications

References 49 publications

Feasibility of energy harvesting from vertical pedestrian‐induced vibrations of footbridges for smart monitoring applications

Feasibility of energy harvesting from vertical pedestrian‐induced vibrations of footbridges for smart monitoring applications

Assessment of the Peak Response of a 5MW HAWT Under Combined Wind and Seismic Induced Loads

Seismic Retrofit of a Multispan Prestressed Concrete Girder Bridge with Friction Pendulum Devices

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