Production of footbridge with double curvature made of UHPC

FIBRE CONCRETE 2017

Kolisko, J.^1 ; itek, D.^1 ; Tej, P.^1 ; Rydval, M.^1

Klokner Institute CTU, Prague, Czech Republic^1

关键词: Casting technology;    Double curvature;    Large scale mock-ups;    Prefabricated elements;    Self-compacting;    Shell structure;    Single-span bridges;    Thin structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/246/1/012009/pdf
DOI  :  10.1088/1757-899X/246/1/012009

来源: IOP

【 摘 要 】

This article present a mix design, preparation and production of thin-walled footbridge made from UHPFRC. In this case an experimental pedestrian bridge was design and prepared. Bridge with span of 10 m and the clear width of 1.50 m designed as single-span bridge. Optimization of UHPFRC matrix and parameters of this material leads to the design of very thin structures. Total thickness of shell structure 30 - 45 mm. Bridge 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. Experimental reached data were compared with extensive numerical analysis and the final design of structure and UHPFRC matrix were optimized in many details. 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.