Published: 2016-12-21

Investigation of strengthening effectiveness of reinforced concrete bridge with prestressed CFRP strips

Bartosz Piątek , Tomasz Siwowski

Abstract

CFRP strips are commonly used for post-strengthening of various structures including bridges. In the recent years prestressed strips have been phased in due to their better effectiveness and durability as compared to non-prestressed strips. Several tensioning-anchoring kits have been developed to implement the prestressed CFRP strips technology. This paper describes implementation of a newly developed tensioning-anchoring kit and the results of experimental investigation of its effectiveness. The structural system of the bridge in question is a reinforced concrete simply supported beam with cantilevers at both sides. During the repair static load tests were carried out before and after installation of prestressed CFRP strips. The purpose of these tests was to verify the post-strengthening effect and assess the in-field performance of system. It was established that post-strengthening with prestressed CFRP strips reduced by 20-30% the stresses induced in the existing reinforcing steel and that the strips acted in combination with the existing reinforcement. The results of the performed tests have proven satisfactory effect and desired performance of the newly developed tensioning-anchoring kit.

Keywords:

bridge tests, CFRP strips, post-strengthening of bridges, post-strengthening system, prestressing

Download files

PDF

Citation rules

Piątek, B., & Siwowski, T. (2016). Investigation of strengthening effectiveness of reinforced concrete bridge with prestressed CFRP strips. Roads and Bridges – Drogi I Mosty, 15(4), 301–314. https://doi.org/10.7409/rabdim.016.019

Cited by / Share

Plum Print visual indicator of research metrics
  • Citations
    • Citation Indexes: 9
  • Captures
    • Readers: 8
see details
Crossref
5
Scopus
9
Bartosz Piatek, Tomasz Siwowski, Jerzy Michalowski, Stanislaw Blazewicz (2020)
Flexural Strengthening of RC Beams with Prestressed CFRP Strips: Development of Novel Anchor and Tensioning System. Journal of Composites for Construction, 24(3),
10.1061/(ASCE)CC.1943-5614.0001020
Czesław Machelski (2009)
Concrete creep effects during bridge span construction using cantilever concreting technology. Roads and Bridges - Drogi i Mosty, 18(3), 193.
10.7409/rabdim.019.013
Bartosz Piątek, Tomasz Siwowski, Jerzy Michałowski, Stanisław Błażewicz (2020)
Development of Bonded/Riveted Steel Anchorages of Prestressed CFRP Strips for Concrete Strengthening. Materials, 13(10), 2217.
10.3390/ma13102217
Tomasz W. Siwowski, Paulina Siwowska (2018)
Experimental study on CFRP-strengthened steel beams. Composites Part B: Engineering, 149, 12.
10.1016/j.compositesb.2018.04.060
Kotynia R. (2023)
State of the art in research and field applications of post-tensioned structures strengthened with prestressed composites. Current Perspectives and New Directions in Mechanics Modelling and Design of Structural Systems Proceedings of the 8th International Conference on Structural Engineering Mechanics and Computation 2022, 1479-1484.
10.1201/9781003348443-241
Lim D. (2022)
Structural behavior of steel beams strengthened with CFRP strips and cables. Steel and Composite Structures, 42(3), 289-298.
10.12989/scs.2022.42.3.289
Rogowski J. (2022)
Comparison of Prestressing Methods with CFRP and SMA Materials in Flexurally Strengthened RC Members. Materials, 15(3),
10.3390/ma15031231
Siwowski T. (2020)
Development and implementation of CFRP post-tensioning system for bridge strengthening. Engineering Structures, 207,
10.1016/j.engstruct.2020.110266
Piatek B. (2020)
Upgrading of existing bridges with CFRP prestressing system-recent polish experience. IABSE Symposium Wroclaw 2020 Synergy of Culture and Civil Engineering History and Challenges Report, 1093-1100.

This website uses cookies for proper operation, in order to use the portal fully you must accept cookies.