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Floating bridges in fjord crossings Stian Moe Johannesen Norwegian Public Roads Administration 26.10.2017
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
Side anchored floating bridges
Floating bridges in fjord crossings
26.10.2017
End anchored floating bridges
Floating bridges in fjord crossings
26.10.2017
Bjørnafjorden basin
Floating bridges in fjord crossings
26.10.2017
Situation overview
K8 – side anchored floating bridge
26.10.2017
High bridge; Tower and navigation channel
K8 – side anchored floating bridge
26.10.2017
Bridge girder
K8 – side anchored floating bridge
26.10.2017
Bridge girder
K8 – side anchored floating bridge
26.10.2017
Pontoons
K8 – side anchored floating bridge
26.10.2017
North abutment
K8 – side anchored floating bridge
26.10.2017
Mooring plan – anchor locations
K8 – side anchored floating bridge
26.10.2017
Robustness in loss of mooring cluster
K8 – side anchored floating bridge
26.10.2017
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
Animation
K8 – side anchored floating bridge
26.10.2017
Situation overview
K7 – end anchored floating bridge
26.10.2017
High bridge, tower and navigational channel
K7 – end anchored floating bridge
26.10.2017
Bridge girder
K7 – end anchored floating bridge
26.10.2017
Pontoons «low part of floating bridge»
K7 – end anchored floating bridge
26.10.2017
Pontoons – «high part of floating bridge»
K7 – end anchored floating bridge
26.10.2017
North abutment
K7 – end anchored floating bridge
26.10.2017
Building methods
K7 – end anchored floating bridge
26.10.2017
Building methods
K7 – end anchored floating bridge
26.10.2017
Marine operations
K7 – end anchored loating bridge
26.10.2017
