Challenge

Project 1

MMayur Dixit19 Mar 2023

AIM : APPLICATION OF DEAD LOAD , LIVE LOAD , EARTH PRESSURE LOAD , WIND LOAD AND SEISMMIC LOAD ON THE AHMEDABAD METRO STATION MODEL AND ANALYSIS OF MADEL USING STAAD PRO

INTRODUCTION :

In this challenge i have to calculate some laods and apply it on Metro station model .
In this challenge Ahmadabad Metro Station model is given to analysis .
The metro station is below the ground level as per the drawings .
There is no any wind load on the strucure
the earth pressure load is lying on the both the sides

GIVEN DATA :

The unit weight of soil is 18kn/m3
The IS 1893 is used to determine seismic zone

MANUAL CALCULATION OF LOADING AND APPLICATION IN STAAD PRO :

SEISMIC LOAD :

The seismic load is very important factor on undergroung structure
We will apply the seismic load on bridge
To apply the loadig click on the loading - defination - seismic load - add

Click on type and select the type Indian IS 1893 part 1

After selecting click on generate and select the city as Ahmadabad and Response Reduction Factor and Type of building as per shown below

Then seismic defination added successfully

Click on add and add a selfweight as 1 in this load defination as shown below

Click on Load Case Details-add named as seismic load in x direction and create a load case and add seismic load in X direction as shown in below and again repeat the procedure and add the load in Z direction

And now the seismic laod is applied succesfully on the structure .

2. DEAD LAOD :

To apply the dead load on the structure we have to provide properties to each component of the structure
The staad model is already given and proprties are given already
We will directly apply the dead load without manual calculation
Click on Load Case Details - add - named as dead load - add - select load case - add - selfweight as -1 - add
Click on load and assign the load to view as per below

The Dead Load is applied successfully

3. LIVE LAOD :

To apply the live load on the slabs use IS 875 Part 2
lets consider , the Metro station is Industrial Building and take a live laod as 10kn/m2
To apply the 10kn/m2 load click on load case details - add - named as live load

Now add a plate load of -10kn/m2 in Global Y direction

Now select the slab to apply this live laod

Assign this load to selected plates and the live laod will apply on the structure

4. IRS LIVE LOADINGS :

When the Metro will pass through the station the generated load we have to apply on the track or the beams given in the model
To apply the load click on load defination - click on vehicle load Defination - add and define the load as shown below

Click on load case details add a load generation i assumed 65 load is generated add this load at a beam where metro will run define the X,Y and Z Co ordinates as shown below

Generate two load cases fpr two tracks and apply the metro laod on the given beam
To see the generated load run the file and the laod will looks like

After run analysis we confirmed that the metro load is applied on the beam rail successfully

5. EARTH PRESSURE LOAD :

Earth pressure load is generated due to the soil .
To apply this load we have to calculate it
Here Earth pressure Load is equal to all the plates on the both side of the structure beacause our structure is under the ground
k1 = Ka X Y X h
= 0.35 X 18 X 20
= 26.3 kn/m2
To apply this calculated the load click on load case details click add and named as earth pressure load
Click on created load case click on add give plate load as 26.3 kn/m2 in X direction and apply it on the structure