Shell-supported footbridges

Curved and Layered Structures

Briseghella Bruno¹  Marano Giuseppe Carlo²  Fenu Luigi³  Congiu Eleonora³ 

[1] Department of Structural, Geotechnical and Building Engineering, Technical University of Torino, Corso Duca degli Abruzzi 24, 10129Torino, Italy;College of Civil Engineering, Fuzhou University, No. 2 Xue Yuan Road, University Town, Fuzhou 350108 –Fujian, China;Department of Civil and Environmental Engineering and Architecture, University of Cagliari, via Marengo 2, 09124Cagliari, Italy;

关键词: concrete shells;    footbridges;    curved bridges;    form-finding methods;    topology optimization;   

DOI  :  10.1515/cls-2020-0017

来源: DOAJ

【 摘 要 】

Architects and engineers have been always attracted by concrete shell structures due to their high efficiency and plastic shapes. In this paper the possibility to use concrete shells to support footbridges is explored. Starting from Musmeci’s fundamental research and work in shell bridge design, the use of numerical form-finding methods is analysed. The form-finding of a shell-supported footbridge shaped following Musmeci’s work is first introduced. Coupling Musmeci’s and Nervi’s experiences, an easy construction method using a stay-in-place ferrocement formwork is proposed. Moreover, the advantage of inserting holes in the shell through topology optimization to remove less exploited concrete has been considered. Curved shell-supported footbridges have been also studied, and the possibility of supporting the deck with the shell top edge, that is along a single curve only, has been investigated. The form-finding of curved shell-supported footbridges has been performed using a Particle-Spring System and Thrust Network Analysis. Finally, the form-finding of curved shell-supported footbridges subjected to both vertical and horizontal forces (i.e. earthquake action) has been implemented.

【 授权许可】

Unknown