Effects of the vertical seismic component on seismic performance of an unreinforced masonry structures

Michele, Francesco Di; Cantagallo, Cristina; Spacone, Enrico

doi:10.1007/s10518-019-00765-3

Cited by 34 publications

(9 citation statements)

References 15 publications

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“…These results have shown how the vertical component effects are more evident for earthquakes, characterized by small site-source distances, exceeding the V/H limit of 2/3 proposed by [12]. This condition shows that for short periods (around 0,2 seconds), the V/H ratio is greater than 1 [6].…”

Section: Ground Motion Characterizationmentioning

confidence: 52%

“…Furthermore, in order to better highlight the influence of the vertical component, the upper (y=0,5x) and lower (y=2x) bounds of the dispersion range have been considered. In this way, the greater scatter with respect to the bisector, the larger effect of the ground motion vertical component [6]. From results obtained, it is possible to notice how the vertical component provides a variation of the displacements regime in vertical direction.…”

Section: Time-history Analysismentioning

confidence: 84%

“…This circumstance is particularly relevant in case of near-field events, where the vertical actions are much more influential than the horizontal ones. In this framework, the studies proposed in [6] showed the relevance of the vertical component for seismic events, called near-field or near-source earthquakes, which are characterized by small site-source distances.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seismic Vulnerability Assessment of Romanian Historical Building under Near-Source Earthquake

Chieffo¹,

Moșoarcă²,

Formisano³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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Section: Ground Motion Characterizationmentioning

confidence: 52%

Section: Time-history Analysismentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seismic Vulnerability Assessment of Romanian Historical Building under Near-Source Earthquake

Chieffo¹,

Moșoarcă²,

Formisano³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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“…Thus, quite often, the vertical component of ground motion can be underestimated in the structural analysis of infrastructures and facilities located in the near-source area. Such behaviour could be deemed critical at the compressor station because resonance phenomena are generated when oscillation frequencies overlap with the building's characteristic content, and it may induce a non-conservative estimation of the seismic capacity (Di Michele et al 2020). Nevertheless, the energy content of the vertical component of strong motion originating from a thrust fault can severely affect the maximum variation in the axial force in the building piers; indeed, if the vertical ground motion generates significant axial force variations in the piers, it influences the related shear and flexural capacities, which may drastically decrease (Di Michele et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Seismic hazard for the Trans Adriatic Pipeline (TAP). Part 2: broadband scenarios at the Fier Compressor Station (Albania)

Moratto

Vuan

Saraò

et al. 2021

Bull Earthquake Eng

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To ensure environmental and public safety, critical facilities require rigorous seismic hazard analysis to define seismic input for their design. We consider the case of the Trans Adriatic Pipeline (TAP), which is a pipeline that transports natural gas from the Caspian Sea to southern Italy, crossing active faults and areas characterized by high seismicity levels. For this pipeline, we develop a Probabilistic Seismic Hazard Assessment (PSHA) for the broader area, and, for the selected critical sites, we perform deterministic seismic hazard assessment (DSHA), by calculating shaking scenarios that account for the physics of the source, propagation, and site effects. This paper presents a DSHA for a compressor station located at Fier, along the Albanian coastal region. Considering the location of the most hazardous faults in the study site, revealed by the PSHA disaggregation, we model the ground motion for two different scenarios to simulate the worst-case scenario for this compressor station. We compute broadband waveforms for receivers on soft soils by applying specific transfer functions estimated from the available geotechnical data for the Fier area. The simulations reproduce the variability observed in the ground motion recorded in the near-earthquake source. The vertical ground motion is strong for receivers placed above the rupture areas and should not be ignored in seismic designs; furthermore, our vertical simulations reproduce the displacement and the static offset of the ground motion highlighted in recent studies. This observation confirms the importance of the DSHA analysis in defining the expected pipeline damage functions and permanent soil deformations.

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“…The same researchers demonstrated the adverse effects of vertical accelerations on low-shear-resistance masonry structures by referring to numerical analysis results. Other investigators have also drawn attention to the potential negative impact of axial load fluctuations on the seismic demand-to-capacity relationship in old URM buildings, 15,16 as well as on precast RC structures. 17 However, these findings rely on numerical simulations only, while experimental evidence is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Effects of vertical ground motions on the dynamic response of URM structures: Comparative shake‐table tests

Kallioras

Graziotti

Penna

et al. 2021

Earthq Engng Struct Dyn

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This paper discusses the results of an experimental study aimed at evaluating the influence of the vertical ground motion component on the seismic performance of unreinforced brick-masonry buildings. The research was motivated by post-earthquake observations of significant structural damage in the vicinity of the fault, where horizontal and vertical ground motions are often strong and synchronized. Vertical accelerations can fluctuate gravity loads, which control the in-plane lateral load capacity of masonry piers and affect the out-of-plane overturning stability of thin walls. Such phenomena seem not to be sufficiently explained in existing literature, while experimental evidence is undoubtedly missing. Here, the damage potential of vertical accelerations was investigated through a series of multidirectional shake-table tests on full-scale structures under simulated near-source ground motions of increasing intensity. The experiments comprised three nominally identical building specimens subjected to the principal horizontal component alone, the horizontal component combined with the vertical one, and the full three-component ground motion. The buildings included structural/nonstructural elements (e.g., gables, chimneys, and parapets) sensitive to gravity load variations due to their low axial loads. Two different sets of three-component earthquake records were employed to assess the effects of both tectonic and induced seismicity scenarios. Overall, the vertical earthquake motion did not cause appreciable differences in the behavior of the buildings. Any influence on the strength and peak response of structural/nonstructural walls was marginal and non-systematic. Data and observations from these experiments add substantially to our understanding of the vertical acceleration effects on masonry structures.

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Effects of the vertical seismic component on seismic performance of an unreinforced masonry structures

Cited by 34 publications

References 15 publications

Seismic Vulnerability Assessment of Romanian Historical Building under Near-Source Earthquake

Seismic Vulnerability Assessment of Romanian Historical Building under Near-Source Earthquake

Seismic hazard for the Trans Adriatic Pipeline (TAP). Part 2: broadband scenarios at the Fier Compressor Station (Albania)

Effects of vertical ground motions on the dynamic response of URM structures: Comparative shake‐table tests

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