PSI - Issue 62

First page Table of contents Previous page 912 Next page Last page

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

www.elsevier.com/locate/procedia

Procedia Structural Integrity 62 (2024) 339–346

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 As part of the structural safety assessment and the adoption of the related "Guidelines for risk classification and management, safety assessment and monitoring of existing bridges", the Passignano viaduct was found to be in a high attention class, so a special inspection was necessary. Alhough, the structural investigations carried out highlighted a good state of conservation of the pre-compression system and the inclined joints at the midspans,the high vertical deformations of the decks in correspondence of the inclined joints with a consequent increase in the axial stress acting in the Dywidag bars were detected. The paper presents some results obtained during the special inspections. As part of the structural safety assessment and the adoption of the related "Guidelines for risk classification and management, safety assessment and monitoring of existing bridges", the Passignano viaduct was found to be in a high attention class, so a special inspection was necessary. Alhough, the structural investigations carried out highlighted a good state of conservation of the pre-compression system and the inclined joints at the midspans,the high vertical deformations of the decks in correspondence of the inclined joints with a consequent increase in the axial stress acting in the Dywidag bars were detected. The paper presents some results obtained during the special inspections. II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Special inspection – traditional and innovative investigation techniques carried out on the “Passignano” viaduct Alberto Gennari Santori a , Diego Esposito b , Luca Righetti b , Francesca Ciarallo b , Luca Ranedda b , Davide Testa b , Giuseppe Galassi Sconocchia c Special inspection – traditional and innovative investigation techniques carried out on the “Passignano” viaduct Alberto Gennari Santori a , Diego Esposito b , Luca Righetti b , Francesca Ciarallo b , Luca Ranedda b , Davide Testa b , Giuseppe Galassi Sconocchia c a Consultant engineer, Roma, Italy – b Centro di Ricerca e Sperimentazione Stradale, Cesano di Roma, Italy c ANAS S.p.A. – Struttura Territoriale Umbria, Perugia, Italy c Self -Employed a Consultant engineer, Roma, Italy – b Centro di Ricerca e Sperimentazione Stradale, Cesano di Roma, Italy c ANAS S.p.A. – Struttura Territoriale Umbria, Perugia, Italy c Self -Employed The article presents some results obtained during the investigation performed by the Structural Diagnostic laboratory of the “Centro di Ricerca e Sperimentazione Stradale di Cesano” on the “Passignano” viaduct located on the Bettolle-Perugia motorway junction managed by Anas S.p.A. It was designed by Prof. Eng. Giorgio Croci in the early 1980s. The infrastructure is characterized by girders supported on two piers with two cantilevered ends. These two ends are characterized by a 45° angle section forming an inclined joint connected by No. 30 Dywidag bars. The on-site investigation consisted of the axial stress evaluation of the joint bars under dead load using two different techniques, a static load test on span No. 7 joint and, eventually test executed during exceptional 150-ton vehicle transiting on the deck. © 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: Viaduct; special inspection; Structural Assessment; Motion Magnification technique; X-Ray diffraction, Static Load Test. The article presents some results obtained during the investigation performed by the Structural Diagnostic laboratory of the “Centro di Ricerca e Sperimentazione Stradale di Cesano” on the “Passignano” viaduct located on the Bettolle-Perugia motorway junction managed by Anas S.p.A. It was designed by Prof. Eng. Giorgio Croci in the early 1980s. The infrastructure is characterized by girders supported on two piers with two cantilevered ends. These two ends are characterized by a 45° angle section forming an inclined joint connected by No. 30 Dywidag bars. The on-site investigation consisted of the axial stress evaluation of the joint bars under dead load using two different techniques, a static load test on span No. 7 joint and, eventually test executed during exceptional 150-ton vehicle transiting on the deck. © 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: Viaduct; special inspection; Structural Assessment; Motion Magnification technique; X-Ray diffraction, Static Load Test. © 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 Abstract Abstract 1. Introduction 1. Introduction

Made with FlippingBook Ebook Creator