Riprap Design at Bridges–Factor of Safety Approach

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by George K. Cotton, CRSS Civil Engineers Inc, Phoenix, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: The factor of safety method offers a physically based methodology for design of riprap that relates the applied shear stress on the channel boundary to the stability of the riprap layer. This conceptual framework allows the method to be applied to a wide variety of river conditions provided that the boundary shear stress can be estimated. The particular advantages for the method at bridges is reviewed based on case studies for Arizona bridges.

Subject Headings: Bridge design | Riprap | Shear stress | Safety | Boundary shear | Structural safety | Hydraulic design | Case studies | Arizona | North America | United States

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