PSI - Issue 64

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

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

Procedia Structural Integrity 64 (2024) 1959–1966

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Test Concepts for Building Materials with Time Dependent Properties André Weber* *Schoeck Bauteile GmbH, Schoeckstr. 1, 76534 Baden-Baden, Germany SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Test Concepts for Building Materials with Time Dependent Properties André Weber* *Schoeck Bauteile GmbH, Schoeckstr. 1, 76534 Baden-Baden, Germany Abstract For all buildings and structures a sufficient safety standard is essential. In the basic building codes like the EN 1990 failure probabilities are defined for different buildings members and applications. Materials as well as actions are characterized by safety factors to fulfil the failure probability requirements and to enable in this way a safe design. But materials with time dependent properties can complicate this process. In this paper different ways to determine the resistance of these materials based on long term tests are presented. For this reason it is important to define characteristic values also for the long term resistance, if the code is based on a semi-probabilistic safety concept. In addition different safety concepts for these materials are discussed regarding technical, economical and practical aspects. As examples the approaches from the EN 1992-1 Annex R, the approach from ACI 440 and CSA and the German approval abZ 1.6 238 are evaluated. A combined performance based approach for a higher economical efficiency with the same proven level of safety is presented at last. This is all shown with practical values and examples. © 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: GFRP rebar, safety concept, design, long term testing, time dependent property © 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 Abstract For all buildings and structures a sufficient safety standard is essential. In the basic building codes like the EN 1990 failure probabilities are defined for different buildings members and applications. Materials as well as actions are characterized by safety factors to fulfil the failure probability requirements and to enable in this way a safe design. But materials with time dependent properties can complicate this process. In this paper different ways to determine the resistance of these materials based on long term tests are presented. For this reason it is important to define characteristic values also for the long term resistance, if the code is based on a semi-probabilistic safety concept. In addition different safety concepts for these materials are discussed regarding technical, economical and practical aspects. As examples the approaches from the EN 1992-1 Annex R, the approach from ACI 440 and CSA and the German approval abZ 1.6 238 are evaluated. A combined performance based approach for a higher economical efficiency with the same proven level of safety is presented at last. This is all shown with practical values and examples. © 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: GFRP rebar, safety concept, design, long term testing, time dependent property

* Corresponding author. Tel.: +49 7223 967 273; E-mail address: andre.weber@schoeck.com * Corresponding author. Tel.: +49 7223 967 273; E-mail address: andre.weber@schoeck.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 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

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