PSI - Issue 62

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ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000

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Procedia Structural Integrity 62 (2024) 514–521

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Analysis of the interaction of a landslide with viaduct foundations under static and dynamic conditions Diana Salciarini a *, Davide Pauselli a , Erica Cernuto a , Giovanni Boco a , Filippo Ubertini a , a Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, Perugia 06125, Italy Abstract The analysis of landslide movements and their consequences on infrastructure is of pivotal interest for social and economic reasons. This article investigates the interaction between bridges and landslides by evaluating the interaction of a landslide with the foundations of a viaduct located on a moderately inclined slope, both under static and dynamic conditions. By analyzing numerous case studies located in different parts of the world, it was possible to highlight the most common conditions and consequences occurring when a landslide interacts, partially or completely, with a viaduct. Based on these analyses, a three-dimensional finite element analysis was developed, considering an ideal complex topography, and simulating a rotational landslide that moves along the direction aligned with the viaduct axis. To model the homogeneous soil volume where the viaduct is founded and the landslide is triggered, an advanced constitutive model was employed, capable of reproducing hysteresis during cyclic loading conditions and the contextual attenuation of the soil dynamic stiffness. The results highlighted that, in seismic scenarios, the foundation piles of the viaduct play a crucial role in balancing the destabilizing actions exerted by the landslide, resulting in a significant reduction in horizontal displacements at the base and top of the pier. II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Analysis of the interaction of a landslide with viaduct foundations under static and dynamic conditions Diana Salciarini a *, Davide Pauselli a , Erica Cernuto a , Giovanni Boco a , Filippo Ubertini a , a Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, Perugia 06125, Italy Abstract The analysis of landslide movements and their consequences on infrastructure is of pivotal interest for social and economic reasons. This article investigates the interaction between bridges and landslides by evaluating the interaction of a landslide with the foundations of a viaduct located on a moderately inclined slope, both under static and dynamic conditions. By analyzing numerous case studies located in different parts of the world, it was possible to highlight the most common conditions and consequences occurring when a landslide interacts, partially or completely, with a viaduct. Based on these analyses, a three-dimensional finite element analysis was developed, considering an ideal complex topography, and simulating a rotational landslide that moves along the direction aligned with the viaduct axis. To model the homogeneous soil volume where the viaduct is founded and the landslide is triggered, an advanced constitutive model was employed, capable of reproducing hysteresis during cyclic loading conditions and the contextual attenuation of the soil dynamic stiffness. The results highlighted that, in seismic scenarios, the foundation piles of the viaduct play a crucial role in balancing the destabilizing actions exerted by the landslide, resulting in a significant reduction in horizontal displacements at the base and top of the pier. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Scientific Board Members © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of Scientific Board Members Keywords: Landslides, Bridges, Finite Element Method, Interaction, Seismic response. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of Scientific Board Members Keywords: Landslides, Bridges, Finite Element Method, Interaction, Seismic response. 1. Introduction Landslides, along with floods and earthquakes, represent primary natural causes of significant economic damage and, in some instances, human casualties. Globally, the incidence of landslides is gaining increasing significance (i.e., Ponziani et al., 2011; Cernuto et al., 2023), leading to disasters and substantial economic losses in various countries. The gravity of this issue is clearly manifested in the structural damage that landslides can inflict on bridges and viaducts, at times resulting in the complete collapse of the infrastructure (i.e., Farneti et al., 2021, Wang et al., 2020; Yang et al., 2022). In this context, many researchers have directed their focus toward the analysis of soil-foundation-structure interaction (e.g., Pauselli et al., 2022; Kita et al., 2021; Lupattelli et al., 2023; Breccolotti et al., 2011), even in complex topographic conditions (Salciarini et al., 2023). In recent years, several global incidents have underscored how landslide movements pose one of the foremost threats to the stability of infrastructures. A significant example is the collapse of Viaduct No.1 of the Caracas-La Guaira highway in Venezuela 1. Introduction Landslides, along with floods and earthquakes, represent primary natural causes of significant economic damage and, in some instances, human casualties. Globally, the incidence of landslides is gaining increasing significance (i.e., Ponziani et al., 2011; Cernuto et al., 2023), leading to disasters and substantial economic losses in various countries. The gravity of this issue is clearly manifested in the structural damage that landslides can inflict on bridges and viaducts, at times resulting in the complete collapse of the infrastructure (i.e., Farneti et al., 2021, Wang et al., 2020; Yang et al., 2022). In this context, many researchers have directed their focus toward the analysis of soil-foundation-structure interaction (e.g., Pauselli et al., 2022; Kita et al., 2021; Lupattelli et al., 2023; Breccolotti et al., 2011), even in complex topographic conditions (Salciarini et al., 2023). In recent years, several global incidents have underscored how landslide movements pose one of the foremost threats to the stability of infrastructures. A significant example is the collapse of Viaduct No.1 of the Caracas-La Guaira highway in Venezuela

* Corresponding author. E-mail address: diana.salciarini@unipg.it * Corresponding author. E-mail address: diana.salciarini@unipg.it

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Scientific Board Members 10.1016/j.prostr.2024.09.073 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4. 0 ) Peer-review under responsibility of Scientific Board Member s 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4. 0 ) Peer-review under responsibility of Scientific Board Member s