Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous

Mohammed Ibrahim; Mauro Poliotti; Yuguang Yang; Max A. N. Hendriks

doi:10.1007/978-3-031-32511-3_87

Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous

Mohammed Ibrahim^*, Mauro Poliotti, Yuguang Yang, Max A. N. Hendriks

^*Corresponding author for this work

Concrete Structures

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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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.

Original language	English
Title of host publication	Building for the Future: Durable, Sustainable, Resilient.
Subtitle of host publication	Proceedings of the fib Symposium 2023 - Volume 2
Editors	Alper Ilki, Derya Çavunt, Yavuz Selim Çavunt
Publisher	Springer
Pages	846–855
Number of pages	10
Volume	350
ISBN (Electronic)	978-3-031-32511-3
ISBN (Print)	978-3-031-32510-6, 978-3-031-32513-7
DOIs	https://doi.org/10.1007/978-3-031-32511-3_87
Publication status	Published - 2023
Event	International Symposium of the International Federation for Structural Concrete, fib Symposium 2023 - Istanbul, Turkey Duration: 5 Jun 2023 → 7 Jun 2023

Publication series

Name	Lecture Notes in Civil Engineering
Publisher	Springer Cham
Volume	350 LNCE
ISSN (Print)	2366-2557
ISSN (Electronic)	2366-2565

Conference

Conference	International Symposium of the International Federation for Structural Concrete, fib Symposium 2023
Country/Territory	Turkey
City	Istanbul
Period	5/06/23 → 7/06/23

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.

Keywords

Creep
Differential shrinkage
Fiber optic sensors
Precast girders
Restraint moments

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10.1007/978-3-031-32511-3_87

978-3-031-32511-3_87Final published version, 982 KB

Cite this

Ibrahim, M., Poliotti, M., Yang, Y., & Hendriks, M. A. N. (2023). Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous. In A. Ilki, D. Çavunt, & Y. S. Çavunt (Eds.), Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2 (Vol. 350, pp. 846–855). (Lecture Notes in Civil Engineering; Vol. 350 LNCE). Springer. https://doi.org/10.1007/978-3-031-32511-3_87

Ibrahim, Mohammed ; Poliotti, Mauro ; Yang, Yuguang et al. / Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous. Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2. editor / Alper Ilki ; Derya Çavunt ; Yavuz Selim Çavunt. Vol. 350 Springer, 2023. pp. 846–855 (Lecture Notes in Civil Engineering).

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title = "Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous",

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.",

keywords = "Creep, Differential shrinkage, Fiber optic sensors, Precast girders, Restraint moments",

author = "Mohammed Ibrahim and Mauro Poliotti and Yuguang Yang and Hendriks, {Max A. N.}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – 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.; International Symposium of the International Federation for Structural Concrete, fib Symposium 2023 ; Conference date: 05-06-2023 Through 07-06-2023",

year = "2023",

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Ibrahim, M , Poliotti, M , Yang, Y & Hendriks, MAN 2023, Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous. in A Ilki, D Çavunt & YS Çavunt (eds), Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2. vol. 350, Lecture Notes in Civil Engineering, vol. 350 LNCE, Springer, pp. 846–855, International Symposium of the International Federation for Structural Concrete, fib Symposium 2023, Istanbul, Turkey, 5/06/23. https://doi.org/10.1007/978-3-031-32511-3_87

Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous. / Ibrahim, Mohammed ; Poliotti, Mauro ; Yang, Yuguang et al.
Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2. ed. / Alper Ilki; Derya Çavunt; Yavuz Selim Çavunt. Vol. 350 Springer, 2023. p. 846–855 (Lecture Notes in Civil Engineering; Vol. 350 LNCE).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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N1 - 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.

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Ibrahim M , Poliotti M , Yang Y , Hendriks MAN. Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous. In Ilki A, Çavunt D, Çavunt YS, editors, Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2. Vol. 350. Springer. 2023. p. 846–855. (Lecture Notes in Civil Engineering). doi: 10.1007/978-3-031-32511-3_87

Measurement of Restraint Moment Effect on Lab Specimens with Precast Girders Made Continuous

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Keywords

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