PhD Graduate

PhD program:: XXXIV

supervisor: Prof. Luigi Callisto

Thesis title: Soil-structure interaction for the seismic design of integral abutment bridges: from advanced numerical modelling to simplified procedures

Integral abutment bridges are characterised by a monolithic connection between the deck and the abutments. Because of this connection, their behaviour during a seismic event is controlled by the interaction of the entire structure with the surrounding soil, and markedly with the approach embankment. Although this is becoming a popular design solution due its low maintenance requirements, procedures for the seismic design are still characterised by substantial uncertainties, mostly because of a lack of comprehension of the dynamic response of the soil-structure system. This study provides a contribution to the interpretation of the seismic behaviour of integral abutment bridges, focusing on a single-span structural scheme type that has received significant attention in recent years. The dynamic interaction between the bridge and the soil is studied with global numerical models of the soil-bridge systems developed in OpenSees and subjected to a variety of ground motions. The results of these dynamic calculations, interpreted also with the aid of a modal analysis of the system, are used to develop simplified design procedures aimed at evaluating the deformation and the internal forces in the structure. In details, a novel seismic design approach based on a nonlinear static analysis is provided for the longitudinal component of the seismic motion, that typically dominates the design of this type of bridges. In addition, a second simplified procedure is developed to take into account the influence of the transverse component of the seismic motion as well as of the wing walls. Two-directional time-domain analyses carried out on the full soil-structure model show that these complementary procedures lead to a seismic design of these bridges without any considerable underestimation. Finally, the possibility to use an average response spectrum prescribed by technical provisions makes this approach immediately applicable to the ordinary design.

Research products

11573/1682248 - 2023 - Modelling Nonlinear Static Analysis for Soil-Structure Interaction Problems
Gallese, Domenico; Gorini, D. N.; Callisto, Luigi - 02a Capitolo o Articolo
book: Proceedings of the 2022 Eurasian OpenSees days - (978-3-031-30124-7; 978-3-031-30125-4)

11573/1616458 - 2022 - On a novel seismic design approach for integral abutment bridges based on nonlinear static analysis
Gallese, Domenico; Gorini, Davide Noe'; Callisto, Luigi - 04b Atto di convegno in volume
conference: The 4th international conference on: Performance-based Design in Earthquake Geotechnical Engineering (Beijing, China)
book: Special Session on Earthquake Disaster Risk of Special Soil Sites and Engineering Seismic Design Organized by Institute of Disaster Prevention and Lanzhou Institute of Seismology - ()

11573/1658945 - 2022 - On the seismic performance of straight integral abutment bridges: From advanced numerical modelling to a practice‐oriented analysis method
Marchi, Andrea; Gallese, Domenico; Gorini, D. N.; Franchin, Paolo; Callisto, Luigi - 01a Articolo in rivista
paper: EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (John Wiley & Sons Limited:1 Oldlands Way, Bognor Regis, P022 9SA United Kingdom:011 44 1243 779777, EMAIL:, INTERNET:, Fax: 011 44 1243 843232) pp. 164-182 - issn: 0098-8847 - wos: WOS:000879075600001 (4) - scopus: 2-s2.0-85141508056 (6)

11573/1616429 - 2021 - Effetti dell'interazione terreno-struttura sul comportamento sismico di ponti integrali a singola campata
Gallese, Domenico; Gorini, Davide Noe'; Callisto, Luigi - 04b Atto di convegno in volume
conference: Atti dell'incontro annuale dei ricercatori di geotecnica 2021 (online)
book: Geotecnica sismica - ()

11573/1454170 - 2020 - A non-linear static approach for the prediction of earthquake-induced deformation of geotechnical systems
Laguardia, R.; Gallese, D.; Gigliotti, R.; Callisto, L. - 01a Articolo in rivista
paper: BULLETIN OF EARTHQUAKE ENGINEERING (Dordrecht: Springer Netherlands Dordrecht: Kluwer Academic Publishers) pp. - - issn: 1570-761X - wos: WOS:000571682700001 (1) - scopus: 2-s2.0-85091212323 (3)

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