PSI - Issue 62

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Procedia Structural Integrity 62 (2024) 377–384 II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Structural Rehabilitation Work On The Viaduct Over The River Po On The A7 Motorway Giuseppe Colombo a , Marco Mariani b , Susanna Lambrugo a , Roberto Giardina b *, Abstract Š͹ ‡ǡ ™ ƒ‘” ƒ ‰ ‡‘† •„‹ ›• – ‡ †‹ Ž‘ƒˆ –‘Š ‡ ‡• –”ƒ” –ƒ‹˜ ƒ ƒŽŽ ‡† • ‡‹ ‹Ž •ƒ ‘‹ ”ƒ‡– ”‰‘‡ˆ‹ –œ– ‹‹ ƒŽ‰‹ ‘ ˆǤ ’ – ǤŠ ‡Ǥ „—”‹ †† ‡‰ ”‡ ‘‘˜ ‡ ” ‡ •‘• ‹ ‘‹˜ ‡‘”ˆǡ ‘–ƒ Ž‹ ƒ‘ ” – Š„‹‘—‹ •– †” › ƒ‘”ˆ ” –‹ ”ƒƒ‰‡ •™’ƒ‘›” –‘ƒˆ – Š‹ ‘‹ ‰ŠǤ ™ Šƒ ›‡ „Ž‡”‹ †‰‰–Š‡ ǡ‘ †ˆ ‡ƒ•„‹ ‰‘—‡– †͸ ͻ‹   –ŠǤ ‡ Šͳ‡ͻ †͸‡Ͳ •ǡ ‹™• ‹† –ƒŠ† ‹‡• ‘ͳˆͺ ”ǤͶ‡ ‹  ˆǡ‘ ‘”ˆ ‡™†Š ‹ ‘Š ͳ”Ͷ‡ –‡ ǡ ‹ͺ• ͲƒͲ˜ ƒ‹ Ž ƒŽ„‘Ž‡‰ ˆǡ ‘ƒ” –†” ƒ ˆ‘ˆ‹ •Ǥ ‹ • –• ‘ ˆ ͳͳ ‹ † ‡  – ‹ ƒ Ž •’ƒ  • ǡ ‡ ƒ Š ™ ‹ –Š ƒ – ‘˜‘‡” ’– ŠŽ ƒ‡ ‡› ‡‹ ƒ ” ͳ• ǡͻ –ͻŠʹ‡ǡ ™• – Š” —‡ – —ƒ”‡ ‹ Š –ƒ‡•‰ —” ƒ–†‹ ˜‡ ‡” ‰ •‘Ž ƒ„‡ ™˜ ƒƒ”•‹ ‘„——•‹ Ž •– –‘” ‡˜ ‡ ”‰ ––ŠŠ‡‡ ‡‹ š ‰‹ • –ƒ‹  †‰ †” ‡‡• –‘ ”ƒƒ–†‹ ‘ ƒ ™ ‡ ‘š ”– ‡”•ǡ ƒ‘Žˆ ™ƒ „Š Ž‹ ‡ Š ’ –”Š‡ ‡Ǧ • – ” ‡‘ •• •– ‹ ‹‰ ’•‘›”•––ƒ‡– ™ Šƒ‡• ‹‘•––ƒ‹ŽŽ‡—†‘ —ˆ‘•” ‹ „•‘’–Š‡ ––Š‹‘‡ •ƒ ‹‘•ˆ• ‘–Š‡• ƒ•–”†— –Š–—‡” „‡ —†ˆ‡ˆ‡–”‡ „–‡‡ƒ† †•‡Ǥ –‡”‹‘”ƒ–‹‘ ‹ ˜ƒ”‹‘—• ’ƒ”–• ‘ˆ –Š‡ •–”— –—”‡ǡ ƒ• ™‡ŽŽ ƒ• †‡ˆ‡ –• ‹ – ŠŠ‡‹ •” ‡ƒƒ” Ž–‹‹œ ƒŽ ‡– ‹ ‘™‹ Ž ‘Ž ˆ† –‡Š•‡ ”’‹ „” ‡‡Ǧ •– Š– ”‡‡ •” ‡• ‹•—‰Ž – ••› ‘•ˆ– ‡–Š ‡ǡ ™‹ ŠǦ †‹ ‡Š’ Š– Šƒ •‹ •˜‹ ‰‡• ‹–ˆ‹‹‰ ƒƒ–‹ ‘– Ž›• Ž ‘ ƒ• –” ”‹ –‹ ‡• †‡ ˆ‘ˆ ‡— – – ‘‹ ˜‡ – Š‡‡• •˜Ǥ ‹ ƒ † — – ǡ – Š ‡ † ‡ • ‹ ‰  ‘ ˆ – Š ‡ • – ƒ – ‹ ƒ  † •‡‡‹•–Š‘‹† •‹ ‘–ˆ‡ ”ƒ˜”‡”›–‹‹‘‰ •‘ ‘—ˆ– ”–‡Š–‡” ‘™ˆ‘‹–”–‹•‰Ǥ ǡ –‘ ”‡•–‘”‡ –Š‡ •–”— –—”‡ –‘ ƒ Ž‡˜‡Ž ‘ˆ ‘’Ž‡–‡ ƒ†‡“—ƒ › –‘ —””‡– ”‡‰—Žƒ–‹‘•ǡ ƒ† –Š‡ © 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: reinforced concrete, seismic isolation, structural rehabilitation, concrete deterioration, in-dept investigation II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Structural Rehabilitation Work On The Viaduct Over The River Po On The A7 Motorway Giuseppe Colombo a , Marco Mariani b , Susanna Lambrugo a , Roberto Giardina b *, a Milano Serravalle Milano Tangenziali S.p.A., via del bosco rinnovato 4/A, Assago, 20057, Italy b Milano Serravalle Engineering s.r.l., via del bosco rinnovato 4/A, Assago, 20057, Italy Abstract Š͹ ‡ǡ ™ ƒ‘” ƒ ‰ ‡‘† •„‹ ›• – ‡ †‹ Ž‘ƒˆ –‘Š ‡ ‡• –”ƒ” –ƒ‹˜ ƒ ƒŽŽ ‡† • ‡‹ ‹Ž •ƒ ‘‹ ”ƒ‡– ”‰‘‡ˆ‹ –œ– ‹‹ ƒŽ‰‹ ‘ ˆǤ ’ – ǤŠ ‡Ǥ „—”‹ †† ‡‰ ”‡ ‘‘˜ ‡ ” ‡ •‘• ‹ ‘‹˜ ‡‘”ˆǡ ‘–ƒ Ž‹ ƒ‘ ” – Š„‹‘—‹ •– †” › ƒ‘”ˆ ” –‹ ”ƒƒ‰‡ •™’ƒ‘›” –‘ƒˆ – Š‹ ‘‹ ‰ŠǤ ™ Šƒ ›‡ „Ž‡”‹ †‰‰–Š‡ ǡ‘ †ˆ ‡ƒ•„‹ ‰‘—‡– †͸ ͻ‹   –ŠǤ ‡ Šͳ‡ͻ †͸‡Ͳ •ǡ ‹™• ‹† –ƒŠ† ‹‡• ‘ͳˆͺ ”ǤͶ‡ ‹  ˆǡ‘ ‘”ˆ ‡™†Š ‹ ‘Š ͳ”Ͷ‡ –‡ ǡ ‹ͺ• ͲƒͲ˜ ƒ‹ Ž ƒŽ„‘Ž‡‰ ˆǡ ‘ƒ” –†” ƒ ˆ‘ˆ‹ •Ǥ ‹ • –• ‘ ˆ ͳͳ ‹ † ‡  – ‹ ƒ Ž •’ƒ  • ǡ ‡ ƒ Š ™ ‹ –Š ƒ – ‘˜‘‡” ’– ŠŽ ƒ‡ ‡› ‡‹ ƒ ” ͳ• ǡͻ –ͻŠʹ‡ǡ ™• – Š” —‡ – —ƒ”‡ ‹ Š –ƒ‡•‰ —” ƒ–†‹ ˜‡ ‡” ‰ •‘Ž ƒ„‡ ™˜ ƒƒ”•‹ ‘„——•‹ Ž •– –‘” ‡˜ ‡ ”‰ ––ŠŠ‡‡ ‡‹ š ‰‹ • –ƒ‹  †‰ †” ‡‡• –‘ ”ƒƒ–†‹ ‘ ƒ ™ ‡ ‘š ”– ‡”•ǡ ƒ‘Žˆ ™ƒ „Š Ž‹ ‡ Š ’ –”Š‡ ‡Ǧ • – ” ‡‘ •• •– ‹ ‹‰ ’•‘›”•––ƒ‡– ™ Šƒ‡• ‹‘•––ƒ‹ŽŽ‡—†‘ —ˆ‘•” ‹ „•‘’–Š‡ ––Š‹‘‡ •ƒ ‹‘•ˆ• ‘–Š‡• ƒ•–”†— –Š–—‡” „‡ —†ˆ‡ˆ‡–”‡ „–‡‡ƒ† †•‡Ǥ –‡”‹‘”ƒ–‹‘ ‹ ˜ƒ”‹‘—• ’ƒ”–• ‘ˆ –Š‡ •–”— –—”‡ǡ ƒ• ™‡ŽŽ ƒ• †‡ˆ‡ –• ‹ • –Š ‡ Š ‡ ‹ ‹ • • ”  ‡ ƒ ‹ ƒ ” Ž – ‹ ‹ ‹ œ  ƒ Ž – ‡ – ‡ ‹ ” ‘ ™ ˜  ‹ ‡ Ž ‘ Ž  ˆ † – ‹ – ‡ ‘ Š •  ‡ • ” ’ ‹ ‘ „ ” ˆ ‡ ‡ ” Ǧ ‡ • –Š – – ” ” ‡ ‘ ‡ • ” ˆ‹ ‡ • – ‹ • –  ‹ —  ‰ Ž ‰ – • • ǡ › – ‘ • ‘ ˆ – ” ‡ – ‡  Š • ‡ – ǡ ‘ ™ ‹ ” Š ‡ Ǧ† ‹ – ‡ Š Š ’ ‡ Š – • Š ƒ – • ” ‹ —  • ˜ ‹‰ – ‡ —  • ” ‹ – ˆ ‡ ‹ ‹ ‰ – ƒ ƒ ‘ –  ‹ ƒ ‘ – Ž  Ž › ‡ • ˜ Ž ‘ ‡ ƒ • Ž – ” ‘ ” ‹ ˆ – ‹ …‡ • ‘ † ‡  ˆ ‘ ˆ ’ ‡ — Ž – ‡ – ‘ ‹ – ˜ ‡  ‡ ƒ  – † Š ‡ ‡ ‡ • “ • ˜ — Ǥ ‹ ƒƒ †›— – ‘– ǡ –—Š”‡” ‡†‡ –• ‹”‰‡‰ —‘Žˆƒ ––Š‹ ‘‡ ••–ǡ ƒ ƒ–‹ † ƒ– Š †‡ ‡–Š‘†• ‘ˆ ƒ””›‹‰ ‘—– –Š‡ ™‘”•Ǥ © 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: reinforced concrete, seismic isolation, structural rehabilitation, concrete deterioration, in-dept investigation © 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 a Milano Serravalle Milano Tangenziali S.p.A., via del bosco rinnovato 4/A, Assago, 20057, Italy b Milano Serravalle Engineering s.r.l., via del bosco rinnovato 4/A, Assago, 20057, Italy

*Giuseppe Colombo. Tel.: +39 02 57594 4748. E-mail address: giuseppe.colombo@serravalle.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 *Giuseppe Colombo. Tel.: +39 02 57594 4748. E-mail address: giuseppe.colombo@serravalle.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 Members 10.1016/j.prostr.2024.09.055