Week 12 Challenge
Given Data:
Span of Bridge = 12m
Width of Bridge = 7m
Size of Pier = 2.5 x 2.5 m
Thickness of Deck Slab = 500mm
Size of Cross girder = 0.75 x 1.8 m
Size of Longitudinal girder = 0.75 x 1.8 m (Assume)
The Dead weight tonnage of Panamax vessel = 52500 DWT
Speed of the Barge = 60Km/hr = 16.7 m/sec
Hydrodynamic coefficient = 1.25
As per IRC : 6, Barge collision Energy KE = 500 x W x Ch x V2
KE = 500 X 52500 X 1.25 X (16.7)^2
KE = 9.15 X 10^9 N-m
Barge Damage Depth
aB = 3100 x ([1 + 1.3 x 10^(-7) x KE]^(0.5)-1)
aB = 103861 mm
Barge Collision Impact Force, 'PB'
as per above solution ab > 100mm, So, PB = 6.0 x 10^6 + 1600 x (aB)
PB = 172177600 N = 172177.6kN
Staad Pro Analysis:
First I created the model as per given data and assign there property as per given data, after that i assigned fixed support to the piers.
After that I go to the load case details where I first defined the Barge Impact Load in +Z Direction. Where in Barge Impact Load I go to the Node loading, where I gave the value of Fz 172178 kN which I calulated eariler. And I gave the value of Fz -620642 kN for -Z direction. After that i assigned it to the middle node.
After that I run the analysis command and go to the post processing mode. Where I 1st select the Barge Impact load in +Z direction in deck slab plates. And checked for the maximun bending moment in Mx direction. Where maximum bending moment in Mx direction is 891.267kN-m/m.
After that I again select the deck slab plates. And checked for the maximun bending moment in MY direction. Where maximum bending moment in MY direction is 263.58kN-m/m.
After that I again select the deck slab plates. And checked for the maximun shear force in SQX direction. Where maximun shear force in SQX direction is 3137.3kN/m2.
After that I again select the deck slab plates. And checked for the maximun shear force in SQY direction. Where maximun shear force in SQY direction is 741.044kN/m
After that I select the Barge Impact load in -Z direction in deck slab plates. And checked for the maximun bending moment in Mx direction. Where maximum bending moment in Mx direction is 891.267kN-m/m.
After that I again select the deck slab plates. And checked for the maximun bending moment in MY direction. Where maximum bending moment in MY direction is 263.58kN-m/m
After that I again select the deck slab plates. And checked for the maximun shear force in SQX direction. Where maximun shear force in SQX direction is 3137.3kN/m2.
After that I again select the deck slab plates. And checked for the maximun shear force in SQY direction. Where maximun shear force in SQY direction is 741.044kN/m
