Week 12 Challenge

AIM

To Design and analyse a bridge with Barge impact load using STAAD Pro. Software.

INTRODUCTION

As per the given data with standard formulas the Barge load due to Panamax is being calculated manually.

KE = 500 x CH x W x V²

^{= 500 x 1.25 x 52500 x 16.6 x 16.6}

^{= 9.04 x 10^9}

^{Barge damage depth}

aB = 3100 X ((1+1.3 x 10^-7 x 9.04 x 10^9)^0.5)-1

= 103199mm

If aB is greater than 100mm

PB = 6 x 10^6 + 1600 x aB

= 166000 KN

PROCEDURE

Step 1 - Create Nodes by entering the corresponding X/Y/Z values as 0 in the Node table 1st row and enter X = 0,Y = 5,Z = 0 for Creation of pier for bridge structure

Step 2 - Then connect the two created nodes with add beam option copy the same till 12m in X axis and copy the resulting structure in Z axis 7m Width of bridge.

Step 3 - Then insert nodes in the beams at 3,6 and 9 m in X axis with Y axis value as 1,2,1 respectively.

Step 4 - Then connect all the nodes with add beam option to form a bow string bridge.

Step 5 - Create plates for the deck slab sixe 12 x 7 m

Step 6 - After that in create support dialog box add fixed support for all the piers in the geometry using assign for selected nodes option.

Step 7 - Then in Properties tab click Prismatic and add the dimension for Piers - 2.5m x 2.5m,Deck slab plate thickness = 0.5 m,Cross griders rectangular beam = 0.75 x 1.8 and other beams = 0.5 x 0.3m

Step 8 - After adding the properties click Loading tab and add Barge load under Load cases.

Step 9 - Then apply uniform member load at Global Z axis as 166000 KN as calculated above.

step 10 - Then in Analysis and design tab define commands for PERFORM ANALYSIS and click run analysis.

RESULTS