Prefabrication of the Thin-Walled U-Profile UHPFRC Footbridge

Abstract:

This article presents a mix design, preparation and production of thin-walled footbridge made from UHPFRC. Optimization of UHPFRC matrix and parameters of this material leads to the design of very thin structures. In this case an experimental pedestrian bridge was designed and prepared. Single-span bridge with span of 10 m and the clear width of 1.50 m with the total thickness of shell structure 30 - 45 mm was cast as a prefabricated element in one piece. Self-compacting character of UHPFRC with high flowability allows the production of the final structure. Extensive research was done before production of footbridge. Two versions of large scale mock-ups were casted and tested. According to the complexity of whole experiment a casting technology and production of formwork were tested and optimized many times. Experimental reached data were compared with extensive numerical analysis and the final design of structure and UHPFRC matrix were optimized in many details.

• Periodical: Key Engineering Materials (Volume 760)
• Pages: 152-157
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.760.152
• Online since: January 2018
• Authors: David Citek, Jiří Kolisko, Petr Tej, Tomáš Mandlík, Stanislav Rehacek
• Keywords: Footbridge, Mock-Up, Thin-Walled, UHPFRC

References

[1] Kabele, P. - Sajdlová, T. - Rydval, M. - Kolísko, J.: Modeling of High-Strength FRC Structural Elements with Spatially Non-Uniform Fiber Volume Fraction. Journal of Advanced Concrete Technology. 2015, vol. 13, no. 6, pp.311-324. ISSN 1346-8014.

DOI: 10.3151/jact.13.311

[2] Kolísko, J. - Rydval, M. - Huňka, P.: UHPC - Assessment of Steel Fibre Distribution and Matrix Homogeneity. In fib Symposium TEL-AVIV 2013 Engineering a Concrete Future: Technology, Modeling & Construction - Proceedings. Tel Aviv: IACIE Israeli Association of Construction & Infrastructure Engineers, 2013, pp.113-116.

[3] Blank, M. - Tej, P. - Kolísko, J. - Vráblík, L. Design of Experimental Suspended Footbridge with Deck Made of UHPC, 3rd International Conference on Mechanics and Mechatronics Research, ICMMR 2016; Chongqing; China; 15 June 2016 through 17 June 2016; ISSN: 2261236X MATEC Web of Conferences, Volume 77, 3 October 2016, Article number 08005, Code 124092.

DOI: 10.1051/matecconf/20167708005

[4] JSCE-USC; Recommendations for Design and Construction of Ultra-High Strength Fiber-Reinforced Concrete Structures – Draft.

[5] AFGC/SETRA: Ultra High Performance Fibre-Reinforced Comcretes, Recommandations (06/2013). Paris CEDEX.

[6] Kolísko J., Rydval M., and Huňka P.: UHPC – Assessing the Distribution of the Steel Fibre and Homogeneity of the Matrix. Tel Aviv, Israel: fib Symposium Tel Aviv, (2013).

[7] Vítek, J. L., Coufal, R., Čítek, D.: UHPC - Development and Testing on Structural Elements. Concrete and Concrete Structures 2013, Žilina, 2013, University of Žilina, pp.218-223.

DOI: 10.1016/j.proeng.2013.09.033

[8] Abbas, S., Nehdi, M.L., Saleem, M.A.: Ultra – High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges, International Journal of Concrete Structures and Materials, Vol. 10, No. 3, pp.271-295, September (2016).

DOI: 10.1007/s40069-016-0157-4

[9] C. Shi, Z. Wu, J. Xiao, D. Wang, Z. Huang, Z. Fang; Review on ultra high performance concrete: Part I. Raw materials and mixture design, Concstruction and Building Materials 101, pp.741-751, (2015).

DOI: 10.1016/j.conbuildmat.2015.10.088

[10] D. Wang, C. Shi, Z. Wu, J. Xiao, Z. Huang, Z. Fang; Review on ultra high performance concrete: Part II. Hydratation, microstructure and properties, Concstruction and Building Mat. 96, pp.368-377, (2015).

DOI: 10.1016/j.conbuildmat.2015.08.095