Title
Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous
Author
Ibrahim, M.S. (TU Delft Concrete Structures)
Poliotti, M. (TU Delft Concrete Structures) 
Yang, Y. (TU Delft Concrete Structures)
Hendriks, M.A.N. (TU Delft Concrete Structures)
Contributor
Ilki, Alper (editor)
Çavunt, Derya (editor)
Çavunt, Yavuz Selim (editor)
Date
2023
Abstract
Typically precast girders are designed and utilized as simple supported members. Alternatively, the precast girders can be made continuous at the intermediate support using cast-in-place concrete topping. Once the girders are made continuous, time-dependent restraint moments will occur. The magnitude of the restraint moment is mainly affected by the creep and shrinkage behaviour of the concrete and the age of the girders at continuity. The developing restraint moment may affect the stress conditions near the support region and, in extreme cases, result in the loss of the integrity of the structural member. Currently, full-scale experimental campaign is underway on the shear behaviour precast continuous girders at Delft University of Technology. Inverted T girders are individually cast and later made continuous after a certain period. To investigate the influence of restrained action and quantify the prestress losses, fiber optic sensors (FOS) are embedded in the girders. By utilizing the FOS, the evolution of the concrete strain is monitored. This paper presents the measurement of the time-dependent strains. Furthermore, the concrete strains are analysed to evaluate the prestress loss and time-dependent restraint moment effect.
Subject
Creep
Differential shrinkage
Fiber optic sensors
Precast girders
Restraint moments
To reference this document use:
http://resolver.tudelft.nl/uuid:7819e2e3-a3b5-4c73-a290-096d060252d9
DOI
https://doi.org/10.1007/978-3-031-32511-3_87
Publisher
Springer
Embargo date
2023-12-03
ISBN
978-3-031-32510-6
Source
Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2, 350
Event
International Symposium of the International Federation for Structural Concrete, fib Symposium 2023, 2023-06-05 → 2023-06-07, Istanbul, Turkey
Series
Lecture Notes in Civil Engineering, 2366-2557, 350 LNCE
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2023 M.S. Ibrahim, M. Poliotti, Y. Yang, M.A.N. Hendriks