PSI - Issue 62

Adalgisa Zirpoli et al. / Procedia Structural Integrity 62 (2024) 492–498 Adalgisa Zirpoli/ Structural Integrity Procedia 00 (2019) 000 – 000

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complexity of comprehending soil behavior for a continuum model. Soil, being a natural material, is intrinsically intricate to explore and replicate, let alone approximating its properties through springs while preserving its non linear characteristics. Hence, reiterating once more, the most precise approach remains to conduct a pushover analysis with the foundation soil being modeled as a continuous medium. In conclusion, it becomes evident that a dynamic analysis carried out using mode shapes and response spectra, or even time history data applied to ground constraints, cannot be equated with a dynamic analysis executed within geotechnical software. This approach allows for the simulation of the damping introduced by the soil and facilitates the interaction between ground motion and structural response. Additionally, it accommodates the consideration of phenomena such as soil liquefaction, which can inflict catastrophic consequences on the overlying structures. These aspects can only be comprehensively addressed through a thorough analysis of the soil-structure system. This illustration underscores the interoperability between the domains of structural analysis and geotechnical analysis. The establishment of this particular linkage arose from the necessity to enhance the information garnered through numerical analysis by amalgamating geotechnical functionalities, which encompass continuous soil modeling using specialized constitutive relationships, water management, and initialization of the initial stress state, with the typical features of structural analysis software. This includes phased modeling, the influence of pre-compression, vehicle induced loads, and structural element compliance with building codes. This collaborative development became feasible thanks to the openness of the two software packages employed. Midas Civil allows data interchange, even if only in part, through a formatted numerical file. In addition, Flac 3D, apart from featuring an internal programming language, empowers the formulation of codes and directives in Python. References Zirpoli, A., Sattamino, P., 2020. L’interoperabilità tra calcolo strutturale e geotecnico per lo studio della sicurezza di ponti esistenti . Ingenio. Zirpoli, A., 2020. L’interazione terreno -struttura per la valutazione del sistema fondazionale di un edificio multipiano. Ingenio. Zirpoli, A., Sattamino, P., 2021. Le sinergie tra BIM e calcolo geotecnico. Ingenio. Zirpoli, A., 2022. Le sinergie tra BIM e calcolo geotecnico. Ingenio.