Week 12 Challenge

AIM:

Calculate the Barge Impact load of the Panamax vessel on the bridge.

GIVEN:

The Dead weight tonnage of Panamax vessel is 52500 DWT.

The Ship can accommodate maximum of 4500 containers.

Each container is of standard 6.1 TEU.

Speed of the Barge is 60Km/hr.

PROCEDURE:

1.First Creat a node

2.12m span and 7m width, cross beams spacing is 1.2m

3.To creat a stresses maximum height 5m, 4.5m, 4m, 3.5m, 3m

4.Add beams and creat pier 5m height

5.Top cross beams add and select the nodes copy past in Z direction 3.5m spacing

6.creat the stress bridge in this shape

7.The piers are fixed supports

8.Pier size is 2.5m X 2.5m rectangular, Cross beams is 0.75m x 1.8m

10.The plate thickness is 0.500m

CALCULATION:

Barge collision energy.

KE = 500 X CH X W X V^2

= 500 X 1.25 X 52500 X 16.67^2

= 9118229531

Barge damage depth 'aB'

aB = 3100 X [ (1 + 1.3 X 10^-7 X KE )0.5 - 1 ]

= 3100 X [ (1 + 1.3 X 10^-7 X 9118229531 )0.5 - 1]

= 103675.5316 mm

Barge Collision Impact force Pb

PB = 6.0 X 10^6 + 1600 X (ab)

= 6.0 X 10^6+ 1600 X 103675.5316

= 171880850 N

Uniform Force

= Pb / length of bridge

= 171880 / 12

= 14323 kN/m

11.Go to loading part > load cases details > add > barge impact load

12.barge impact load > add > member load > concentrated force > P= -14323, d1 = 2.5m, GZ direction

13.The load apply in the pier

14.Ana then go to analysis and run analysis > go to post process mode

RESULTS:

15.Deflection

16.FY Shear

17.MZ bending moment

18.Plate stresess MY local

19.Plate stresess SY local