Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces

Andreas Lampropoulos; Ourania Tsioulou; Demetris Nicolaides; Michael F. Petrou

doi:10.1007/978-3-031-32511-3_88

Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces

Andreas Lampropoulos, Ourania Tsioulou, Demetris Nicolaides, Michael F. Petrou

School of Arch, Tech and Eng

Research output: Chapter in Book/Conference proceeding with ISSN or ISBN › Chapter › peer-review

Abstract

Ultra High Performance Fiber Reinforced Concrete (UHPFRC) is characterized by considerably enhanced tensile and compressive strength and significantly improved energy absorption in the post-cracking region. The application of UHPFRC for the strengthening of existing reinforced concrete beams and/or columns is a well promising technique taking into consideration the superior mechanical properties and the durability of the material. However, the connection between the old and the new concrete is always a crucial parameter for the performance of the strengthened elements since failure at the interface and de-bonding of the new layer or jacket is the most common failure type in case of elements strengthened with this technique. One of the most important parameters for the application of the technique is the preparation of the surface and the evaluation of the bond strength between UHPFRC and concrete. In the present study the results of an extensive experimental program on the evaluation of the behavior of concrete-to-UHPFRC interfaces are presented. Various interface types have been examined with different roughness degrees and the shear stress-slip characteristics have been evaluated.

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	856–866
Number of pages	11
Volume	350
ISBN (Electronic)	9783031325113
ISBN (Print)	9783031325106
DOIs	https://doi.org/10.1007/978-3-031-32511-3_88
Publication status	Published - 1 Jun 2023

Publication series

Name	Lecture Notes in Civil Engineering

Keywords

Interfaces
Push-off tests
Strengthening
UHPFRC

Access to Document

10.1007/978-3-031-32511-3_88

Cite this

Lampropoulos, A., Tsioulou, O., Nicolaides, D., & Petrou, M. F. (2023). Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces. 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. 856–866). (Lecture Notes in Civil Engineering). Springer. https://doi.org/10.1007/978-3-031-32511-3_88

Lampropoulos, Andreas ; Tsioulou, Ourania ; Nicolaides, Demetris et al. / Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces. 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. 856–866 (Lecture Notes in Civil Engineering).

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abstract = "Ultra High Performance Fiber Reinforced Concrete (UHPFRC) is characterized by considerably enhanced tensile and compressive strength and significantly improved energy absorption in the post-cracking region. The application of UHPFRC for the strengthening of existing reinforced concrete beams and/or columns is a well promising technique taking into consideration the superior mechanical properties and the durability of the material. However, the connection between the old and the new concrete is always a crucial parameter for the performance of the strengthened elements since failure at the interface and de-bonding of the new layer or jacket is the most common failure type in case of elements strengthened with this technique. One of the most important parameters for the application of the technique is the preparation of the surface and the evaluation of the bond strength between UHPFRC and concrete. In the present study the results of an extensive experimental program on the evaluation of the behavior of concrete-to-UHPFRC interfaces are presented. Various interface types have been examined with different roughness degrees and the shear stress-slip characteristics have been evaluated.",

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Lampropoulos, A , Tsioulou, O, Nicolaides, D & Petrou, MF 2023, Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces. 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, Springer, pp. 856–866. https://doi.org/10.1007/978-3-031-32511-3_88

Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces. / Lampropoulos, Andreas ; Tsioulou, Ourania; Nicolaides, Demetris 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. 856–866 (Lecture Notes in Civil Engineering).

Research output: Chapter in Book/Conference proceeding with ISSN or ISBN › Chapter › peer-review

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AU - Lampropoulos, Andreas

AU - Tsioulou, Ourania

AU - Nicolaides, Demetris

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PY - 2023/6/1

Y1 - 2023/6/1

N2 - Ultra High Performance Fiber Reinforced Concrete (UHPFRC) is characterized by considerably enhanced tensile and compressive strength and significantly improved energy absorption in the post-cracking region. The application of UHPFRC for the strengthening of existing reinforced concrete beams and/or columns is a well promising technique taking into consideration the superior mechanical properties and the durability of the material. However, the connection between the old and the new concrete is always a crucial parameter for the performance of the strengthened elements since failure at the interface and de-bonding of the new layer or jacket is the most common failure type in case of elements strengthened with this technique. One of the most important parameters for the application of the technique is the preparation of the surface and the evaluation of the bond strength between UHPFRC and concrete. In the present study the results of an extensive experimental program on the evaluation of the behavior of concrete-to-UHPFRC interfaces are presented. Various interface types have been examined with different roughness degrees and the shear stress-slip characteristics have been evaluated.

AB - Ultra High Performance Fiber Reinforced Concrete (UHPFRC) is characterized by considerably enhanced tensile and compressive strength and significantly improved energy absorption in the post-cracking region. The application of UHPFRC for the strengthening of existing reinforced concrete beams and/or columns is a well promising technique taking into consideration the superior mechanical properties and the durability of the material. However, the connection between the old and the new concrete is always a crucial parameter for the performance of the strengthened elements since failure at the interface and de-bonding of the new layer or jacket is the most common failure type in case of elements strengthened with this technique. One of the most important parameters for the application of the technique is the preparation of the surface and the evaluation of the bond strength between UHPFRC and concrete. In the present study the results of an extensive experimental program on the evaluation of the behavior of concrete-to-UHPFRC interfaces are presented. Various interface types have been examined with different roughness degrees and the shear stress-slip characteristics have been evaluated.

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PB - Springer

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Lampropoulos A , Tsioulou O, Nicolaides D, Petrou MF. Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces. 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. 856–866. (Lecture Notes in Civil Engineering). doi: 10.1007/978-3-031-32511-3_88

Strengthening of Existing Structures with UHPFRC: Concrete-To-UHPFRC Interfaces

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