Serviceability and Damage Scenario in Irregular RC Structures: Post-Earthquake Observations and Modeling Predictions

Ceci, Alfredo Maria; Gattulli, Vincenzo; Potenza, Francesco

doi:10.1061/(asce)cf.1943-5509.0000317

Cited by 22 publications

(28 citation statements)

References 20 publications

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“…The identified modal behavior reflects what was observed during the structural analyses (Ceci et al., ), in particular it is evident in the analyses that substructure A3 preserves in symmetry both stiffness and mass distribution with respect to the transversal axis, whereas a relevant eccentricity exists with respect to the longitudinal axis. This is confirmed by the identified modal shapes, in which the first mode is purely transversal and involves globally both the facade and the internal frame structure, whereas the second and third modes are a combination of longitudinal and rotational modal components.…”

Section: Identified Modal Modelssupporting

confidence: 77%

“…Indeed, it can be noticed that large and sharp peaks are present around 6 and 12 Hz prevalently in the acceleration spectral components measured at the sensors (302, 308, 309) located at a larger distance from the rigid RC walls. The occurrence of vibrations with a strong rotational component during the 2009 earthquake has been confirmed by the damage pattern observed on the masonry bricks of the facade (Ceci et al., ); this dynamic behavior is described by both the identified and the FE models, as illustrated in the following paragraph.…”

Section: Rapid Experimental Testing Campaign Under Environmental Loadsmentioning

confidence: 65%

“…The structural elements did not visibly show serious structural damage (on the basis of numerical simulations as well, they have shown to be adequate to withstand the seismic sequence that occurred). However, of all the buildings in the Faculty complex, the building under study showed the worst damage scenario in terms of nonstructural components as shown in Figure 2 (Ceci et al, 2013). The high deformability of the frames resulted in damage to the internal masonry walls; within substructures A3 and A4 the infill walls collapsed due to overturning or breaking in their plane.…”

Section: Structural System Of Edifice Amentioning

confidence: 99%

See 2 more Smart Citations

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Foti

Gattulli

Potenza

2014

Computer aided Civil Eng

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Knowledge of the dynamic behavior of complex buildings subjected to near‐fault earthquakes may be enriched by valuable information obtained through rapid onsite dynamic testing to aid in the design of appropriate retrofitting interventions. Through a case study, the article demonstrates the enhancement in comprehension of the structural behavior obtained by means of a 2‐day testing campaign conducted on a complex building of the Engineering Faculty, Edifice A, which was heavily damaged in the 2009 L'Aquila earthquake. The onsite testing was carried out with a network of 13 accelerometers opportunely located to identify the dynamic characteristics of the structure by means of ambient noise‐induced vibration. Enhanced Frequency Domain Decomposition (EFDD) and Stochastic Subspace Identification (SSI) output‐only procedures were both used to identify the main modal parameters of two substructures of the building. The modal characteristics were used to update a finite element model representing small amplitude vibrations of the damaged structures. The direct comparison of the identified modal features with finite element models, in which damaged member locations are determined by onsite visual observations, has permitted identification of a model representative of the structural behavior of the building in the immediate postearthquake conditions.

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Section: Identified Modal Modelssupporting

confidence: 77%

Section: Rapid Experimental Testing Campaign Under Environmental Loadsmentioning

confidence: 65%

Section: Structural System Of Edifice Amentioning

confidence: 99%

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Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Foti

Gattulli

Potenza

2014

Computer aided Civil Eng

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“…It is right to specify that the structural parameters chosen for System 4 are referred to a real case of dissipative connection for seismic retrofitting analyzed in previous works whose details are reported in other works . Further, the design criteria based on the system response will consider also the effect of the soil both in the response and in the design.…”

Section: Design Control Strategiesmentioning

confidence: 99%

Design criteria for dissipative devices in coupled oscillators under seismic excitation

Gattulli

Potenza

Spencer³

2018

Struct Control Health Monit

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Design criteria for a visco-elastic connection of two simple oscillators under seismic excitation are proposed. The dissipative connection is described by Kelvin-Voigt rheological model. The features of the selected criteria are explored for the system parameter set based on the analytical solutions of the associated eigenvalue problem and to the closed-form solutions of the stochastic system response. Design maps are drawn in the nondimensional space of the relevant system parameters in which a direct comparison of the obtained design values is possible. Furthermore, performance indices are used to assess the response of the two simple coupled oscillators subject to natural excitation to demonstrate the robustness with respect to nonstationary excitation.

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“…This work propones the optimization of the nonlinear stochastic responses of a simple model composed by two linear oscillators linked by a dissipative element [6]. A depth analysis of synthetic and analytical systems could be very useful for both to explain experimental phenomena and to develop design procedures [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Optimal Dissipative Coupling Design of Two Oscillators Based on Nonlinear Stochastic Response

Potenza¹,

Gattulli²,

Spencer³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The work proposes an optimization procedure for the design of a nonlinear dissipative coupling device of two oscillators subjected to stochastic dynamic excitation. Two simple oscillators connected by Bouc-Wen type hysteretic device describe the system. Zero-mean filtered white noise is the base excitation. The knowledge of the stationary response variances, evaluated by equivalent linearization permits to define the optimization problem to design the device. Finally, Monte Carlo simulations using filtered white noise and natural earthquake records at different levels of seismic magnitude conclude the evaluation of the procedure efficacy.

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Serviceability and Damage Scenario in Irregular RC Structures: Post-Earthquake Observations and Modeling Predictions

Cited by 22 publications

References 20 publications

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Output‐Only Identification and Model Updating by Dynamic Testing in Unfavorable Conditions of a Seismically Damaged Building

Design criteria for dissipative devices in coupled oscillators under seismic excitation

Optimal Dissipative Coupling Design of Two Oscillators Based on Nonlinear Stochastic Response

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