PSI - Issue 62

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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Procedia Structural Integrity 62 (2024) 347–354

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Experimental and analytical investigation on the evaluation of residual stresses in prestressed concrete girders II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Experimental and analytical investigation on the evaluation of residual stresses in prestressed concrete girders Giulia Rossini a *, Matteo Lamberti a , Stefano G.Mantelli a , Fausto Minelli a , Giovanni Plizzari a a Dipartimento di Ingegneria Civile, Architettura, Territorio, Ambiente e di Matematica, Via Branze 43, 25123 Brescia, Italy Abstract Since the strength of prestressed reinforced concrete (PRC) structures, particularly under shear, substantially depends on the effective residual prestressing force, the evaluation of residual stresses in prestressed concrete structures is currently a target of importance. Three semi-destructive techniques were used on the 4 PRC full scale: core trepanning, saw-cut at intrados, and blunt pyramidal specimen for in-situ prestressing evaluation based on tension release. Furthermore, a novel method, resembling parallel saw cuts at the intrados but applied to the web, was introduced and examined. Among the tested techniques, this latter approach demonstrated the highest reliability, and both 2D and 3D finite element models were developed and extensively discussed to support the findings. © 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: ƉƌĞƐƚƌĞƐƐĞĚ ĐŽŶĐƌĞƚĞ ŐŝƌĚĞƌƐ͖ ĞdžŝƐƚŝŶŐ ďƌŝĚŐĞƐ͖ ƌĞƐŝĚƵĂů ƉƌĞƐƚƌĞƐƐŝŶŐ ĨŽƌĐĞ͖ ĂƐƐĞƐƐŵĞŶƚ͖ ŶŽŶͲĚĞƐƚƌƵĐƚŝǀĞ ƚĞƐƚ͖ ƐĂǁͲ ĐƵƚ ƚĞƐƚ͘ Giulia Rossini a *, Matteo Lamberti a , Stefano G.Mantelli a , Fausto Minelli a , Giovanni Plizzari a a Dipartimento di Ingegneria Civile, Architettura, Territorio, Ambiente e di Matematica, Via Branze 43, 25123 Brescia, Italy Abstract Since the strength of prestressed reinforced concrete (PRC) structures, particularly under shear, substantially depends on the effective residual prestressing force, the evaluation of residual stresses in prestressed concrete structures is currently a target of importance. Three semi-destructive techniques were used on the 4 PRC full scale: core trepanning, saw-cut at intrados, and blunt pyramidal specimen for in-situ prestressing evaluation based on tension release. Furthermore, a novel method, resembling parallel saw cuts at the intrados but applied to the web, was introduced and examined. Among the tested techniques, this latter approach demonstrated the highest reliability, and both 2D and 3D finite element models were developed and extensively discussed to support the findings. © 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: ƉƌĞƐƚƌĞƐƐĞĚ ĐŽŶĐƌĞƚĞ ŐŝƌĚĞƌƐ͖ ĞdžŝƐƚŝŶŐ ďƌŝĚŐĞƐ͖ ƌĞƐŝĚƵĂů ƉƌĞƐƚƌĞƐƐŝŶŐ ĨŽƌĐĞ͖ ĂƐƐĞƐƐŵĞŶƚ͖ ŶŽŶͲĚĞƐƚƌƵĐƚŝǀĞ ƚĞƐƚ͖ ƐĂǁͲ ĐƵƚ ƚĞƐƚ͘ © 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

* Corresponding author. E-mail address: giulia.rossini@unibs.it * Corresponding author. E-mail address: giulia.rossini@unibs.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 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

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.2024.09.051