Electrical Transmission and Substation Structures 2018
Flood Design of Substation Structures
Publication: Electrical Transmission and Substation Structures 2018: Dedicated to Strengthening our Critical Infrastructure
ABSTRACT
Substation structure design in flood plains are a unique design situation not accounted for in the current version of ASCE 113. Appropriate flood loads and load combinations for substations can be obtained utilizing ASCE 113 and incorporating the design standard ASCE 24. This paper proposes modification to the equations in ASCE 113 to apply appropriate effects of loads due to flooding effects in combination with typical characteristic loads of substation structures. The effects of flood loading can be demonstrated using three case studies of structural designs for a typical substation bus structure. The first case study is located within the riverine flood hazard area. The second case study is in a coastal A zone, designated on the FEMA’s FIRM inside the limits of moderate wave action (LiMWA). The final case study is a coastal V zone, also designated by FEMA. The case studies are evaluated to show the loading impacts of inappropriately selecting flood design locations, categories, and load combinations.
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References
ASCE (American Society of Civil Engineers). (2005) Minimum Design Loads for Buildings and Other Structures, Standard ASCE/SEI 7-05. Third printing. ASCE, Reston, VA.
ASCE (American Society of Civil Engineers). (2005) Flood Resistant Design and Construction. Standard ASCE/SEI 24-05. ASCE, Reston, VA
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ASCE (American Society of Civil Engineers). (June 2017), Civil Engineering Magazine, Better Mapping, Mitigation Will Benefit National Flood Insurance Program, Senator Told, Jay Landers, ASCE, Reston, VA.
FEMA (Federal Emergency Management Agency). Region II Coastal Analysis and Mapping. FEMA. Retrieved from http://www.region2coastal.com/resources/coastal-mapping-basics/
FEMA (FEDERAL Emergency Management Agency). (1981) Design Guidelines for Flood Damage Reduction, FEMA 15
FEMA (FEDERAL Emergency Management Agency). (2011) Coastal Construction Manual, FEMA P-55
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US Army Corps of Engineers. (2008) Engineering and Design Coastal Engineering Manual, Department of the Army US Army Corps of Engineers, Washington, DC
Information & Authors
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Published In
Electrical Transmission and Substation Structures 2018: Dedicated to Strengthening our Critical Infrastructure
Pages: 157 - 166
Editor: Michael Miller, SAE Towers
ISBN (Online): 978-0-7844-8183-7
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Nov 1, 2018
Published in print: Nov 1, 2018
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