PSI - Issue 59

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 59 (2024) 793–798

© 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 DMDP 2023 Organizers Abstract This text addresses challenges in building structures with new materials, proposing a 3D printing-based method for connecting functional and carbon alloy rods. Conventional coupler connections are critiqued for complexity, requiring skilled labor and machinery. The selected polymer, PLA+, exhibits superior mechanical properties. The connecting element's cross-section is determined using ANSYS software. The 3D-printed PLA+ tube assembly method is tested for tension, showing static friction at 0.45 kN. The approach simplifies installation without special tools. Testing on a reinforced concrete beam demonstrates gradual collapse with ductile behavior until brittle concrete failure due to 5% reinforcement exceeding limits. The study suggests 3D printing as a viable alternative for rod connections in construction engineering. © 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 DMDP 2023 Organizers Keywords: couplers; reinforced concrete beam; polymers; 3D printeng; PLA; joining of rebars 1. Introduction The use of new materials and their implementation in building structures is a complex engineering challenge. Some materials cannot be welded, while others have a melting point that is too high compared to structural steel. A solution is to use a coupler connection. In some studies, rods made of shape memory alloys were VII International Conference ―In -service Damage of Materials: Diagnostics and Prediction ‖ (DMDP 2023) Joining the rebars with strengthened elements in a concrete beam Bykiv N a .*, Iasnii V a ., Kosicka E b . a Ternopil Ivan Puluj National Technical University , Ternopil, Ukraine b Lublin University of Technology, Lublin, POLAND a b

* Corresponding author. Tel.: +380-98-23-84-310. E-mail address: nazbuk@gmail.com

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 DMDP 2023 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 DMDP 2023 Organizers 10.1016/j.prostr.2024.04.113