Structural design of floodways under extreme flood loading

Greene, Isaac and Lokuge, Weena and Karunasena, Warna (2020) Structural design of floodways under extreme flood loading. International Journal of Disaster Resilience in the Built Environment. pp. 1-21. ISSN 1759-5908

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Abstract

Purpose – Current methods for floodway design are predominately based on hydrological and hydraulic design principles. The purpose of this paper is to investigate a finite element methods approach for the inclusion of a simplified structural designmethod into floodway design procedures.
Design/methodology/approach – This research uses a three dimensional finite element method to investigate numerically the different parameters, geometric configurations and loading combinations which cause floodway vulnerability during extreme flood events. The worst-case loading scenario is then used as the basis for design from which several structural design charts are deduced. These charts enable design bending moments and shear forces to be extracted and the cross-sectional area of steel and concrete to be designed in accordance with the relevant design codes for strength, serviceability and durability.
Findings – It was discovered that the analysed floodway structure is most vulnerable when impacted by a 4-tonne boulder, a 900mm cut-off wall depth and with no downstream rock protection. Design charts were created, forming a simplified structural design process to strengthen the current hydraulic design approach provided in current floodway design guidelines. This developed procedure is demonstrated through application with an example floodway structural design.
Originality/value – The deduced structural design process will ensure floodway structures have adequate structural resilience, aiding in reduced maintenance and periods of unserviceability in the wake of extreme flood events.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 21 Jul 2020 05:42
Last Modified: 27 Jul 2020 01:32
Uncontrolled Keywords: Floods; Floodways; Infrastructure; Bridge failure; Resilience; Impact load
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090505 Infrastructure Engineering and Asset Management
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: https://doi.org/10.1108/IJDRBE-10-2019-0072
URI: http://eprints.usq.edu.au/id/eprint/38722

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