Week 12 Challenge
AIM – The aim of our is that, to Calculate the Barge impact load for the Panamax vessel on the bridges and Create the model in Staad Pro and analysis the Structure.
INTRODUCTION – the Barge impact load is the bridges crossing navigable channels of rivers ,creeks and canals as well as shipping channels in port areas and open areas can be provides with navigation spans.
The bridge details in given below.
The Span of the Bridge is 12m
The Box girder dimension is 1500 *1500 with a web thickness of 300mm
The diameter of the circular pier is 2.5m
The width of deck slab is 7m and
Pier of size is 2.5m*2.5m
The cross girder are 0.75*1.8m
The Thickness of deck Slab is 500mm
Assume the truss member size 0.5*0.5m
The dead weight tonnage of panamax vessel is 52500 DWT.
The ship can accommodate maximum of 4500 containers
Each container is standard 6.1 TEU
Speed of the Barge is 60Km/hr.
hydrodynamic coefficient as 1.25
PROCEDUCE IN DETAIL:-
STEP1:- First create the node and select the add beam Command and create the beam.
STEP2:- Then, Select the beam then go to the translation repeat Command and create the beam .
Step3:- After Create the model then go the support command create the fixed supports and assign the supports.
Step4:- After Create the support then go to the properties command and select geometry and assign the properties
Step5:- Then Calculate the Barge impact load as per Inland Waterway Authority of India (IWAI)
KE= 500*Ch*W*V^2
Where W is Barge displacement tonnage (T)
V Barge impact speed (m/s)
Ch is hydrodynamic coefficient
KE= 500*1.25*52500*16.667^2
V=60 kM/hr
V= 60 *5/18
=16.67m/s
KE=9041812.5KN-m
Barge damage depth, aB=3100*{(1+1.3*10^-7 KE)^0.5-1}
Where aB is Barge blow damage depth (mm)
aB=3100*{(1+1.3*10^-7*9.0418125*10^9)^0.5-1
=103227.543mm
Barge collision impact force, Pb
The barge collision impact force shall be determined based on the following equations.
For ab <100mm, Pb= 6.0*10^4*(aB), in N
For ab >=100mm, Pb= 6.0*10^6+1600*(aB), in N
Then case 1 is following
Pb =0.6*10^4*103227.543
=619365.258kN
Step6:- After go to the Load definitions and defined the Barge impact Load
Step7:-Create the load and assign the load into model
Step8:- Then slave the file and assign run analysis.
Step9:- Then Check the Deflection, displacement and all deformation on the structural element .
RESULT:- 619365.258kN the Barge impact load is acting in the bridge.
Axial force of model
Shear force Y of model
Shear force Z of model
Torsion of model
Bending Y of model
Bending Z of model
Reactions of model
