PSI - Issue 64

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 1967–1974

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures NLFEA Damage Assessment of RC Framed Buildings Subjected to Column Settlements E. Michelini a , S. Dudziak b , S. Ravasini a , B. Belletti a * a Department of Engineering and Architecture – University of Parma, Parco Area delle Scienze 181/A, Parma 43124, Italy b Faculty of Civil Engineering – Warsaw University of Technology, 16 Armii Ludowej Avenue, Warsaw 00-637, Poland Abstract The prevention of progressive collapse in buildings caused by different actions, usually not considered in normal design, has attracted increasing interest in recent years. In Reinforced Concrete (RC) frames, a frequent cause of progressive collapse is represented by large settlements of one or more columns, caused e.g., by design or construction errors, underground works, or foundation failure. The focus of this work is to identify significant structural response parameters, which can be used both to assess the reliability level of existing structures subjected to large differential settlements, and to proper design Structural Health Monitoring (SHM) systems able to detect in real-time the triggering of possible structural issues. To this end, nonlinear finite element analyses are carried out, by considering different settlement scenarios. The applied procedure is first validated against experimental results from the literature, and then applied to the damage assessment of an existing Italian school building. © 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 SMAR 2024 Organizers Keywords: NLFEA; progressive collapse; damage limit states; existing RC frames; large column settlements © 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 SMAR 2024 Organizers

1. Introduction One of the most common causes of progressive collapse in RC frames is represented by large column settlements.

* Corresponding author. Tel.: +39.0521.905930; fax: +39.0521.905924 E-mail address: beatrice.belletti@unipr.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 SMAR 2024 Organizers

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 SMAR 2024 Organizers 10.1016/j.prostr.2024.09.269