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Soil–structure interaction for the seismic design of the Messina Strait Bridge
Abstract This paper illustrates an approach to the study of the seismic soil–structure interaction that was developed at the verification stage of the design of the Messina Strait Bridge in order to validate its seismic behaviour. It consisted of a series of two-dimensional, plane strain numerical analyses on models that included, in addition to the embedded foundation elements, a simplified structural description of the bridge towers: simplified structural models were specifically designed to reproduce the first vibrations modes of the towers, that were deemed to have the most significant influence on the system's dynamic response. Non-linear dynamic analyses were carried out in the time domain, studying the effects of two different natural records, each characterised by three orthogonal components of the soil motion. In the first part of the paper, essential information is provided about the foundations layout, the main properties of the foundation soil resulting from the in situ and laboratory investigation, and the assessment of the liquefaction potential. Then, the numerical models are discussed in some detail, with an emphasis on the modelling of the soil and of the structural elements. For sake of conciseness, details are provided only for one of the two shores. The results obtained with the present approach shed some light on the complex coupling between the soil's and the structure's behaviour, evidencing the significant role that the embedded, massive foundations of the bridge play in the dynamic response of the system. The computed time-histories of the displacements of the foundation elements are used to assess the seismic performance of the bridge.
Highlights Soil–structure interaction of the Messina Bridge to validate its seismic behaviour. Foundations layout, soil properties and evaluation of the liquefaction potential. Plane strain dynamic analyses including simplified description of the bridge towers. Coupling between soil and structure behaviour, role of embedded massive foundations. Assessment of final displacements and rotations: seismic performance of the bridge.
Soil–structure interaction for the seismic design of the Messina Strait Bridge
Abstract This paper illustrates an approach to the study of the seismic soil–structure interaction that was developed at the verification stage of the design of the Messina Strait Bridge in order to validate its seismic behaviour. It consisted of a series of two-dimensional, plane strain numerical analyses on models that included, in addition to the embedded foundation elements, a simplified structural description of the bridge towers: simplified structural models were specifically designed to reproduce the first vibrations modes of the towers, that were deemed to have the most significant influence on the system's dynamic response. Non-linear dynamic analyses were carried out in the time domain, studying the effects of two different natural records, each characterised by three orthogonal components of the soil motion. In the first part of the paper, essential information is provided about the foundations layout, the main properties of the foundation soil resulting from the in situ and laboratory investigation, and the assessment of the liquefaction potential. Then, the numerical models are discussed in some detail, with an emphasis on the modelling of the soil and of the structural elements. For sake of conciseness, details are provided only for one of the two shores. The results obtained with the present approach shed some light on the complex coupling between the soil's and the structure's behaviour, evidencing the significant role that the embedded, massive foundations of the bridge play in the dynamic response of the system. The computed time-histories of the displacements of the foundation elements are used to assess the seismic performance of the bridge.
Highlights Soil–structure interaction of the Messina Bridge to validate its seismic behaviour. Foundations layout, soil properties and evaluation of the liquefaction potential. Plane strain dynamic analyses including simplified description of the bridge towers. Coupling between soil and structure behaviour, role of embedded massive foundations. Assessment of final displacements and rotations: seismic performance of the bridge.
Soil–structure interaction for the seismic design of the Messina Strait Bridge
Callisto, Luigi (author) / Rampello, Sebastiano (author) / Viggiani, Giulia M.B. (author)
Soil Dynamics and Earthquake Engineering ; 52 ; 103-115
2013-05-30
13 pages
Article (Journal)
Electronic Resource
English
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