Issue 47

Y. Mizuno et alii, Frattura ed Integrità Strutturale, 47 (2019) 209-220; DOI: 10.3221/IGF-ESIS.47.16 209 Design of Civil Environmental Engineering Structural form of bridges reflecting construction processes Yusuke Mizuno Nippon Engineering Consultants CO., LTD., Japan mizuno@ne-con.co.jp Yoshiaki Kubota University of Toyama, Japan kubota@sus.u-toyama.ac.jp A BSTRACT . The structural form of a bridge during construction is strongly affects its structural form after completion, with innovative construction processes sometimes leading to innovative bridge designs. It is thus important to consider the construction process during bridge design methods. This approach could be applied not only to new construction but also to replacements, reconstructions, or reinforcements. One of the authors has previously systematized the structural forms of bridges and clarified the principles. This study aims to extend these principles to construction systems. Changes in the structural systems of the construction processes and systematization of the relationship between a completed bridge and construction process in a design are illustrated. Three types of structural systems (suspension, beam, and arch systems) were analysed in terms of material efficiency and time efficiency for corresponding construction states of construction, completed, retrofitted, and retrofitting. Each system exhibited different levels of efficiency at different levels of efficiency at different states of construction. This systematization enables the application of a variety of conventional construction methods in a system. This would be helpful in developing new construction methods and designs for bridges. K EYWORDS . Systematization; Construction Process; Innovative Bridge Design. Citation: Mizuno, Y., N., Kubota, Y., N., Structural Form of Bridges Reflecting Construction Processes, Frattura ed Integrità Strutturale, 47 (2019) 209-220. Received: 29.07.2018 Accepted: 29.11.2018 Published: 01.01.2019 Copyright: © 2019 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION he structural form of a completed bridge is strongly affected by its structural form during construction. As such, innovative construction processes sometimes produce innovative bridge designs. It is important to consider the construction process in conjunction with bridge design methods. For example, Kingsgate Bridge (Fig. 1) in Durham, T