PSI - Issue 44

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

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

Procedia Structural Integrity 44 (2023) 1933–1939

© 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. Hybrid Coupled Wall (HCW) systems consist of reinforced concrete walls connected with steel coupling beams. HCWs benefit from the superior lateral stiffness of the reinforced concrete walls, while the coupling mechanism reduces the moment demand at the base of the walls. The present study investigates the seismic performance of a new HCW system equipped with friction-damped self-centering coupling beams and examines the efficiency of the new system in reducing residual deformations. The coupling beams of the intended HCW system consist of self-centering links, which can be easily repaired after severe earthquake events. The self-centering system utilized in this study features the following advantages distinguish it from conventional self-centering solutions: (i) it eliminates the coupling beams elongation problem (ii) it facilitates the application of pre-fabricated self-centering components to mitigate uncertainties raised by post-tensioning the connections on site. In this paper, the seismic behavior of the proposed lateral load-bearing system is investigated under several ground motion records and intensities. It is demonstrated that the applied self-centering mechanism has the capacity to minimize earthquake-induced residual deformations and repair time without increasing the damage level expected for the concrete walls in conventional HCWs. © 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: Hybrid Coupled Wall Systems, Self-Centering, Reinforced Concrete Walls, Shear Links, Seismic Performance. 1. Introduction A Hybrid Coupled wall (HCW) system consists of two or more reinforced concrete (RC) walls connected by steel coupling beams. Coupling of RC walls mitigates the moment demand at their base when subjected to lateral loads. XIX ANIDIS Conference, Seismic Engineering in Italy Seismic performance of self-centering hybrid coupled wall systems: Preliminary assessments Mojtaba Farahi a *, Fabio Freddi a , Massimo Latour b a Deptment of Civil, Environmental & Geomatic Engineering, University College London, London, UK b Departme t of Civil Engineering, Univ rsity of Salerno, Salerno, Italy Abstract Hybrid Coupled Wall (HCW) systems consist of reinforced concrete walls connected with steel coupling beams. HCWs benefit from the s erior lateral stiffne s of the reinforced conc ete walls, while the c upling mec anism reduces th oment dema d a the base of th wal s. The present study investigat s the seismic performance of a new HCW syste q ipped with friction-d mped self-centering coupling beams and examines the efficiency of the new system in reducing residual deformat ons. The coupling b ams of the intended HCW ystem consist of sel -centering links, which can be easily repaire fter severe earthquake events. The self-centering system utilized in this study f atur s the fo lowing advantages di tinguish it from con ntional self-cent ring solutions: (i) it eliminates the coupling beams elongation prob em (ii) it facilitat the appl cat on f pre-fabricated c mp ents to m tigate unc rtainties raised by p st-tensioning the connect ons on site. In this paper, the seismic behavior of the proposed lateral load-bearing sys em is investigated u der several ground moti records and intensi ies. It is demonstrated that the applied self-centering mechanism has the c pacity to minimize earthquake-induce residual deforma ions and repair time without ncreasing th damag level expected for the concrete walls in conventional HCWs. © 2022 The Authors. Publish d 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 u der re ponsibility of scientific committe of the XIX ANIDIS C nference, Seismic Engineering in Italy K ywords: Hybri Coupled Wall S stems, Self-Centering, Reinforced Concrete Walls, Shear Links, Seismic Performance. 1. Introduction A Hybrid Coupled wall (HCW) system consists of two or more reinforced concrete (RC) walls connected by steel coupling beams. Coup ing of RC walls mitigates the moment d ma d at their bas when subjected to lateral loads. XIX ANIDIS Conference, Seismic Engineering in Italy Seismic performance of self-centering hybrid coupled wall systems: Preliminary assessments Mojtaba Farahi a *, Fabio Freddi a , Massimo Latour b a Deptment of Civil, Environmental & Geomatic Engineering, University College London, London, UK b Department of Civil Engineering, University of Salerno, Salerno, Italy Abstract

* Corresponding author. E-mail address: mojtaba.farahi@ucl.ac.uk * Corresponding author. E-mail address: mojtaba.farahi@ucl.ac.uk

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.2023.01.247