Soil–Structure Interaction Assessment of the 23 November 1980 Irpinia-Basilicata Earthquake

Mina, Daniele; Forcellini, Davide

doi:10.3390/geosciences10040152

Cited by 24 publications

(12 citation statements)

References 48 publications

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“…With the predictive expressions listed in Table 1, the required amount of input information (hence, the expected degree of accuracy) increases down the list. Equation (5) which is placed at the top of the list requires the minimum amount of input information.…”

Section: Shear Wave Velocitymentioning

confidence: 99%

“…The amplification phenomenon is controlled by the shear wave velocity of the soil layers, the soil column depth to bedrock and the nature of the excitations transmitted from the bedrock [2]. It is acknowledged that soil-water interaction (saturated conditions) [3][4][5][6] and 2D phenomena (characterized by topographical and geotechnical parameters) [7][8][9][10] can also affect site response behavior, but their considerations are outside the scope of this study. Substantial amplification is expected when the natural period of the soil column model (which is known as the site period) comes close to the natural period of the structure, resulting in conditions pertaining to resonance behavior, and more so if the site period also comes close to the dominant period of the bedrock excitation.…”

Section: Introductionmentioning

confidence: 97%

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Site-Specific Response Spectra: Guidelines for Engineering Practice

Lam

Khatiwada

et al. 2021

CivilEng

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Code response spectrum models, which are used widely in the earthquake-resistant design of buildings, are simple to apply but they do not necessarily represent the real behavior of an earthquake. A code response spectrum model typically incorporates ground motion behavior in a diversity of earthquake scenarios affecting the site and does not represent any specific earthquake scenario. The soil amplification phenomenon is also poorly represented, as the current site classification scheme contains little information over the potential dynamic response behavior of the soil sediments. Site-specific response spectra have the merit of much more accurately representing real behavior. The improvement in accuracy can be translated into significant potential cost savings. Despite all the potential merits of adopting site-specific response spectra, few design engineers make use of these code provisions that have been around for a long time. This lack of uptake of the procedure by structural designers is related to the absence of a coherent set of detailed guidelines to facilitate practical applications. To fill in this knowledge gap, this paper aims at explaining the procedure in detail for generating site-specific response spectra for the seismic design or assessment of buildings. Surface ground motion accelerograms generated from the procedure can also be employed for nonlinear time-history analyses where necessary. A case study is presented to illustrate the procedure in a step-by-step manner.

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Section: Shear Wave Velocitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Site-Specific Response Spectra: Guidelines for Engineering Practice

Lam

Khatiwada

et al. 2021

CivilEng

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“…Although this assumption gives reasonable results for hard soils, it may cause some errors, especially in soft and loose soils. Some studies have been performed on SSI and SFSI in recent years [20][21][22]. SSI is generally performed with 3 different methods.…”

Section: Soil-structure Interactionmentioning

confidence: 99%

“…9(b). In the FE method, the soil boundaries' modeling is an significant factor [21]. It is recommended to expand the soil medium until the region where the soil's effect on the structure is minimal.…”

Section: Soil-structure Interactionmentioning

confidence: 99%

“…Although this assumption is acceptable for hard soils, it may lead to wrong results for soft and loose soils [19]. In recent years, some studies have been carried out in fields such as Soil-Structure-Interaction (SSI) [20] and Structure-Foundation-Soil Interaction (SFSI) [21,22]. Camata et al [23] determined that the boundary conditions and properties of the soil on the structural behavior of a tower built in Italy had great importance on the seismic behavior of the structure.…”

Section: Introductionmentioning

confidence: 99%

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Seismic damage assessment of a historical masonry minaret considering soil-structure interaction

Altıok¹,

Demir²

2021

JSEAM

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Historical structures should be carefully preserved and transferred to the next generations. Therefore, their seismic performances should be investigated in detail. In the finite element method, many parameters affect the seismic behaviour and damage distribution in the structures. One of the most significant parameters is the Soil-Structure Interaction effect. In finite element analyses, the soil medium is generally neglected, and the structures' base is restrained by fixed supports. In this study, seismic response of a historical masonry minaret is investigated by considering the Soil-Structure Interaction and Operational Modal Analysis methods. To determine the effect of Soil-Structure Interaction on structural behaviour, the fixed supports, hard and soft soil mediums at the base of the structure are modelled. The material and failure behaviours are defined with the Concrete Damage Plasticity model. Displacements, principal stresses, damage rates, and damage distribution of models are obtained with nonlinear time history analyses. According to the results, the interstory drift increases due to the decrease in the stiffness of the soil media. In addition, the fixed supports model was damaged more tensile stress damage than the other models. The least occurred in the soft soil model. It is concluded that the Soil-Structure Interaction effect significantly affects structural behaviour, especially the damage rate and distribution.

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Seismic fragility assessment of geotechnical seismic isolation (GSI) for bridge configuration

Forcellini

Alzabeebee

2022

Bull Earthquake Eng

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The seismic vulnerability of bridges may be reduced by the application of Geotechnical Seismic Isolation (GSI) below the foundations of the columns and the abutments. However, the role of GSI on the seismic response of bridges has been limitedly examined in literature. Therefore, this research has been conducted to study the effect of applying GSI on the seismic response of bridges to address the aforementioned gap in knowledge. Advanced nonlinear dynamic three-dimensional finite element analyses have been conducted using OpenSees to study the influence of the GSI. The cases of traditional and isolated bridges subjected to earthquakes have been considered to assess the GSI effects. The results showed that the GSI reduces the seismic effect on the column while its effect seems to be less significant for the abutments. In addition, fragility curves for the traditional and isolated cases have been developed and compared to provide insights with a probabilistic-based approach. The results of this paper provide a useful benchmark for design considerations regarding the use of GSI for bridges.

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Soil–Structure Interaction Assessment of the 23 November 1980 Irpinia-Basilicata Earthquake

Cited by 24 publications

References 48 publications

Site-Specific Response Spectra: Guidelines for Engineering Practice

Site-Specific Response Spectra: Guidelines for Engineering Practice

Seismic damage assessment of a historical masonry minaret considering soil-structure interaction

Seismic fragility assessment of geotechnical seismic isolation (GSI) for bridge configuration

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