Week 9 Challenge

AIM – The aim of our is that, to Calculate the wave load for the bridges surperstrurcture and Create the model in Staad

Pro and analysis the Structure.

INTRODUCTION –

The bridge details in given below.

The Span of the Bridge is 12m

The width of deck slab is 9m

The maximum crest elevation for the wave is 3 m

The deck of the slab is supported by three I Girders.

Each I Girder is 1.7 m height with a top and bottom flange width of 2.5m.

The thickness of flange and web is 500 mm

The thickness of deck slab is 2m.

Assume constant r as 5.

Assume Cva as 3.

The Storm elevation is 8.5m.

Take Cr as 0.4

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 beam then genernate the node and create the plate with the help of plate cursor and the translation

repeat Command.

Step4:- After Create the model then go the support command create the fixed supports and assign the supports.

Step5:- After Create the support then go to the properties command and select geometry and assign the properties.

Step6:- Then Calculate the wave load as per IS code 4651

Maximumum crest ήmax=3 m

Zh= ήmax-Centroid of I girder

=3-(1.7/2)

=2.15m

Zv=ήmax- Elevation of bottom deck

=3-1.5

=1.5 m

Number of girder supporting bridge deck, N=3

Horizontal load, Fh =r*Zh*Ah

=5*2.15*3*12

=387kN

Max Horizontal load, Fhmax ={1 +Cr(N-1)}Cva*Fv

={1+0.4(3-1)}*3*387

=2089.8kN

Vertical load, Fv= r*Zv*Av

=5*1.5*(9*1.7/2)

=57.375kN

Max Vertical load Fvmax = Cva*Fv

=3*57.375

=172.125kN

Step7:- After go to the Load definitions and defined the Wave load.

Step8:-Create the load and assign the load into model.

Then Check how can be genernate the load , then go to the load view diagram.

Step8:- Then slave the file and assign run analysis.

Step9:- Then Check the Deflection, displacement and all deformation on the structural element

RESULT:-

Max Horizontal load is 2089.8kN and Max Vertical load 172.125kN the Wave 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