PSI - Issue 44

ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 44 (2023) 27–34

© 2023 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 the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. Abstract The paper presents a methodology for the identification of the physical parameters of a model describing the transverse dynamics of soil-foundation-pier systems founded on piles, starting from results of dynamic experimental tests. In detail, the procedure exploits the identified state-space models of the systems obtained from results of dynamic tests through consolidated identification techniques available in the literature. The procedure permits to compute the physical parameters of the real system (e.g. masses, pier stiffness matrix, and soil-foundation impedance) by directly comparing the components of the analytical and identified stiffness, mass and damping matrices; the latter extracted from the identified state-space models. The proposed approach allows the direct definition of the numerical model that best fits the experimental data, and permits the identification of the soil-foundation compliance. Firstly, the dynamics of the analytical model, which includes the frequency-dependent behaviour of the soil-foundation system through the introduction of a lumped parameter model, is formulated adopting the continuous-time first-order state-space form. Then, an identification strategy of the physical parameters of a soil-foundation-pier system is proposed, starting from the discrete-time state-space model identified from dynamic tests. The procedure allows the identification of the soil-foundation system compliance through experimental tests. © 2022 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 the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy Keywords: system identification; state-space models; forced vibration tests; ambient vibration tests XIX ANIDIS Conference, Seismic Engineering in Italy A Methodology for Extracting the Physical Parameters of Soil Foundation-Pier Systems from Dynamic Tests Sandro Carbonari a, *, Francesca Dezi b , Davide Arezzo a , Fabrizio Gara a a Università Politecnica delle Marche, DICEA, via Brecce Biancche 12, Ancona 60131, Italy bUniversity of Camerino, Geology Division, School of Science and Technology, via Gentile III da Varano, Camerino 62032, Italy Abstract The paper presents a methodology for the identification of the physical parameters of a model describing the transverse dynamics of soil-foundation-pier systems founded on piles, starting from results of dynamic experimental tests. In detail, the procedure expl its the ide tif d state- pace models of the systems obtained from results of dynamic tests through cons lidated identifica ion techniques available in the literature. The procedure permits to comp te the ph sical parameters of the real system (e.g. masses, pier stiffness matrix, and so l-foundation impedance) by directly comparing t e com onents of the analytical and identified stiffn ss, mas and damping matrices; the latt r extracted f om the identified state-spac m dels. The propose approach allows the direct definition of the num rical model that best fits the experimental ata, and permits the identification of the s il-foundation compliance. Firstly, dynami s of th analytical model, which includes he frequ ncy-depen t behaviour of the soil-foundation system through the introduction of a lumped parameter model, is formulated adopting the continuous-time first-order state-space form. Then, an identification str tegy of the physical parameters of a soil-fou dation-pier system is p op sed, star ing from the discr te-time state-sp ce model identi ied from dynamic tests. The procedure allows the identification of the soil-foundation syst m compliance through experimental ests. © 2022 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 u der responsibility of scientific committe of the XIX ANIDIS C nference, Seismic Engineering in Italy Keywords: system identification; state-space models; forced vibration tests; ambient vibration tests XIX ANIDIS Conference, Seismic Engineering in Italy A Methodology for Extracting the Physical Parameters of Soil Foundation-Pier Systems from Dynamic Tests Sandro Carbonari a, *, Francesca Dezi b , Davide Arezzo a , Fabrizio Gara a a Università Politecnica delle Marche, DICEA, via Brecce Biancche 12, Ancona 60131, Italy bUniversity of Camerino, Geology Division, School of Science and Technology, via Gentile III da Varano, Camerino 62032, Italy

* Corresponding author. Tel.: +39-071-2204551. E-mail address: s.carbonari@univpm.it * Corresponding author. Tel.: +39-071-2204551. E-mail address: s.carbonari@univpm.it

2452-3216 © 2022 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 the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy 2452-3216 © 2022 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 the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy

2452-3216 © 2023 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 the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. 10.1016/j.prostr.2023.01.005