Multiple Support Excitation of a Bridge Based on Bem Analysis of the Subsoil-Structure-Interaction Phenomenon

Fontara, Ioanna‐Kleoniki; Titirla, Magdalini; Wuttke, Frank; Athanatopoulou, Asimina; Manolis, George D.; Sextos, Anastasios

doi:10.7712/120115.3419.1280

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Consequently, the intensity of earthquakes is directly related to the parameters of foundation soil. Therefore, this assumption of uniform site gives rise to an inaccurate representation of the adopted seismic ground motion [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…In the beginning, the site effect was incorporated into the definition of spatial ground motion by simple approaches or simplified models. Next, researchers started to study this phenomenon by adopting more realistic models [10,16,19,20,24]. Indeed, the analysis of the site response can be very complex, especially if a site has very divergent characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Spatially Variable Artificial Earthquake: A Case Study of Different Site Conditions

Derbal

Benmansour

Djafour

2021

Modelling in Civil Environmental Engineering

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The dynamic analysis of structures under seismic ground motions is a major issue in earthquake engineering. The seismic ground motions observed at the surface are variables in space and time. The main causes of this variability come from seismic waves propagation between the source and the site, and in particular the local geological site conditions. For this purpose, it is essential to consider all these factors of the spatial variability of seismic ground motion when representing seismic loading to be applied to any structure. Given the scarcity of real seismic records, many researchers suggest the use of artificial or synthetic seismic motions. The main objective of this study is the simulation of spatially variable artificial seismic motions by considering all fact of factors of the seismic spatial variability, especially site local conditions. In this sense, a simulation technique of spatially variable seismic motions is developed using the spectral representation method. By adopting the unconditional simulation approach, the target seismic motion in bedrock is defined by the Clough-Penzien spectral model and a specified coherency loss model. Then, the simulated ground motions in the bedrock are projected on the surface by considering amplification site effect. The results showed that the simulated artificial seismic motions are strongly conditioned by the local site conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of Spatially Variable Artificial Earthquake: A Case Study of Different Site Conditions

Derbal

Benmansour

Djafour

2021

Modelling in Civil Environmental Engineering

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“…The non-synchronous excitation of the bridge excited higher modes of vibration and suppressed the oscillation of its fundamental mode. Fontara et al [36] studied the site effects, spatial variability of seismic motion, and soil-structure interaction on the inelastic response of bridge structures. Both synchronous and non-synchronous seismic effects on the bridge were determined.…”

mentioning

confidence: 99%

Response of Aswan cable-stayed bridge to spatial non-synchronous seismic excitations

et al. 2022

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Cable-stayed bridges are important infrastructure facilities serving the world today. Therefore, their safety against earthquake ground motions is crucial. However, due to their long spans, the affecting seismic excitations might be spatially non-synchronous. This paper presents a study of the effect of non-synchronous seismic excitations on Aswan cable-stayed bridge located at southern Egypt. Nonlinear time history analysis was conducted on a three-dimensional finite element model of the bridge. The spatial variability was represented in terms of the wave passage effect which was simulated via different delay times between the arrivals of the ground motion to bridge supports. Results indicated that spatial variability of earthquake ground motion has, in general, a favorable effect on most bridge response parameters. This is attributed to the flexibility of the overall bridge provided by the flexibility of the bridge structural system and/or by existence of seismic isolation.

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The Role of Soil Structure Interaction on the Seismic Resilience of Isolated Structures

Forcellini

2022

Applied Sciences

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Resilience has become an interesting parameter to assess the seismic risk connected with functionality of structures. In this regard, losses due to earthquakes may be significantly reduced by applying isolation at the base of the structures. However, design of isolation needs to consider the effects of soil deformability and all the connected effects of soil structure interaction (SSI). In particular, soil deformability may reduce significantly the benefit of base isolation and thus the computation of resilience needs to consider such conditions. This paper aims to consider the issue by considering several isolated configurations on different soil conditions and for each of them, the seismic resilience has been computed. Numerical simulations have been performed in order to calculate the resilience of the various configurations and then this parameter was chosen a reference for comparing the isolation models on different soil conditions.

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Multiple Support Excitation of a Bridge Based on Bem Analysis of the Subsoil-Structure-Interaction Phenomenon

Abstract: This study presents a numerical investigation of the influence of spatial variability

Cited by 3 publications

References 12 publications

Simulation of Spatially Variable Artificial Earthquake: A Case Study of Different Site Conditions

Simulation of Spatially Variable Artificial Earthquake: A Case Study of Different Site Conditions

Response of Aswan cable-stayed bridge to spatial non-synchronous seismic excitations

The Role of Soil Structure Interaction on the Seismic Resilience of Isolated Structures

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