Upload
duonghanh
View
218
Download
0
Embed Size (px)
Citation preview
Floating bridges in fjord crossings
Stian Moe Johannesen
Norwegian Public Roads Administration
26.10.2017
Short historic overview
● 1939 – Lacey V.Murrow Memorial Bridge – 2020m - US
● 1961 - William A. Bugge Bridge - Hood Canal Bridge - 2400 - US
● 1963 - Governor Albert D. Rosellini Bridge “Evergreen point” - 2350m - US
● 1989 – Homer M, Hadley Meomorial bridge – 1771 - US
● 1992 - Bergsøysundet Bridge - 931m -NOR
● 1994 – Nordhordland Bridge - 1614m - NOR
● 2008 - William R. Bennett Bridge (Okanagan) – 1060m – CAN
● 2017 – New «Evergreen point» replacement bridge - 2350m - US
Floating bridges in fjord crossings
26.10.2017
Values given in total bridge length [m]
Why evaluate floating bridges as concept
Floating bridges in fjord crossings
26.10.2017
H, Svensson, Cable-Stayed Bridges – 40 Years of Experience Worldwide,2012Logarithmic scale on horizontal axis
Ship impact
K8 – side anchored floating bridge
26.10.2017
Maximum stress plot in bridge girder from centric and eccentric impacts on all pontoons (axis 3–35)
Deckhouse collision with bridge girder, ongoing project with NTNU
Pontoon verification test at SINTEF Ocean AS
Objective: Verification of numerical simulation tools (low period range)
Scope: Single pontoon test
● Estimate added mass and radiation damping (apply forced motion)
● Estimate excitation forces by measuring forces in 6 DOF for a fixed model in regular waves
K8 – side anchored floating bridge
26.10.2017