PSI - Issue 44

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

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

Procedia Structural Integrity 44 (2023) 394–401

© 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 current draft of the revised version of Eurocode 8 introduces significant modifications regarding the global seismic assessment of existing masonry buildings via nonlinear static analysis, particularly when dealing with building knowledge. The approach is still based on the selection of discrete knowledge levels, although partial safety factors are now consistently applied to global displacement capacity. This paper firstly describes the main new aspects introduced by the considered code revision. Among these, new strength criteria for the single masonry elements are introduced, together with a Bayesian approach to update the knowledge on material properties, exploiting the availability of experimental results. To better explore the code approach, the seismic assessment procedure is applied to a case study building, made of clay bricks, considering different knowledge levels. In particular, a distribution of displacement capacities is obtained for each knowledge level by considering residual uncertainties and properly sampling material properties and local drift capacities of masonry structural members. A statistical procedure for defining partial safety factors reducing the global displacement capacity resulting from the analysis is then presented. © 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: unreinforced masonry; nonlinear analysis; seismic assessment; knowledge level; partial safety factors XIX ANIDIS Conference, Seismic Engineering in Italy A methodology for the calibration of partial safety factors accounting for knowledge level, in pushover-based seismic assessment of URM buildings according to the new draft of Eurocode 8 Stefano Bracchi a, *, Maria Rota b , Andrea Penna c a Dept. of Buildings and Infrastructures, EUCENTRE Foundation, Via Ferrata 1, 27100 Pavia, Italy b Dept. of Industrial Products, EUCENTRE Foundation, Via Ferrata 1, 27100 Pavia, Italy c Dept. of Civil Engineering and Architecture, University of Pavia, Via Ferrata 3, 27100 Pavia, Italy Abstract The current draft of the revised version of Eurocode 8 introduces significant modifications regarding the global seismic ass ssm t of exis ing ma onry buildings via nonl ear static a alysis, part cul rly when ealing with building knowledge. Th approach i still ase on the selection of discrete knowledge levels, alt ough partial safety factors are now consistently ppl ed to global displac ment capac ty. This pap r firstly describes the m in n w aspect introduced by th consider c de revision. Among these, new strength criteria for the s ngle masonry el ments are , together with a Bay sian approach to update the knowledge on ma erial properties, exploiti g th availability of experimental results. To better explore the code approach, th seis ic assessment procedure is applied to case study building, made of clay ricks, considering different knowledg levels. In particular, a istr bution of displacement capacities is obtained for each knowl dge lev l by consid ring residual uncertainties and properly sampling material properties and local drift capaciti s of masonry structu al members. A sta istical procedure for defining partial s fety fac or reducing the global displacement capaci y resulting from the analysis is then presented. © 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 scientific committe of the XIX ANIDIS C nference, Seismic Engineering in Italy Keywords: unreinforced masonry; nonlinear analysis; seis ic assessment; knowledge level; partial safety factors XIX ANIDIS Conference, Seismic Engineering in Italy A methodology for the calibration of partial safety factors accounting for knowledge level, in pushover-based seismic assessment of URM buildings according to the new draft of Eurocode 8 Stefano Bracchi a, *, Maria Rota b , Andrea Penna c a Dept. of Buildings and Infrastructures, EUCENTRE Foundation, Via Ferrata 1, 27100 Pavia, Italy b Dept. of Industrial Products, EUCENTRE Foundation, Via Ferrata 1, 27100 Pavia, Italy c Dept. of Civil Engineering and Architecture, University of Pavia, Via Ferrata 3, 27100 Pavia, Italy

* Corresponding author. Tel.: +39 0382-5169843 E-mail address: stefano.bracchi@eucentre.it * Corresponding author. Tel.: +39 0382-5169843 E-mail address: stefano.bracchi@eucentre.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.2023.01.052