Week 8 Challenge

AIM : TO CALCULATE THE CENTRIFUGAL FORCE OF THE CLASS 70R LOADING VEHICLE AND APPLY THE LOAD ON THE BRIDGE AND ANALYSIS OF THE BRIDGE USING ATAAD PRO

INTRODUCTION :

1. In this challenge i have to calculate the centrifugal force of the vehicle
2. I created the model using given data and some modification i created in the model
3. Vehicle defination have to give properly

ASSUMPTIONS :

1. Height of the pier is 10m.
2. Load generation is 50
3. All the components made of the concrete

GIVEN DATA :

1. Span of the bridge : 12m
2. width pf the bridge 7m
3. live load of class 70R laoding
4. Design speed 75km/hr
5. Radius of curvature : 3m

CALCULATION :

Centrifugal Force : C :

W X V X V / 127R

70 X 75 X 75 / 127 X 3

C = 930KN

PROCEDURE TO MAKE A MODEL AND ANALYSIS OF MODEL :

1. Create a beams , piers and deck slab of the structure

• Add a node 0,0,0 and another node at the 10m height below the first one
• Add a beam between this nodes and using translational repeat create copy of this beam in Z direction at a distance of the 7m
• select this two beams and using translational repeat copy this beams in X direction at a spacing of 3m and of 5 steps
• Add a beam between this beams and create cross beams
• Select the one corner node and copy this in X direction and select both and copy this nodes in Z direction at a distance of the 0.5 m and create a plate
• The structure will ooks like below

2. Add a support to the piers :

• Select the plate and by using the translational repeat copy the plate in X direction having 23 steps and in Z direction of 13 steps at a distance of 0.5
• add a fixed support and assign this support to the bottom nodes of the pier

3. Assign the properties to the each component :

• Click on properties click on create and add a properties of circle 1.5m diameter and rectangle of 1.5 X 1m and plate thickness of the 0.5m
• This all are consist of concrete
• Click on circuler property and assign this property to the pier

• Click on the rectangle property and assign te property to the all the beams

• Assign the plate thickness property to the all the plates

• All the properties assigned to the structure

• In the 3D rendering our structure will look like this

4. LOADING DEFINATION

• Click on loading - Defination - add - vehicle defination add the laod we calculated in above calculation shown in below

• Click on load case details and add a load generation 50 assumed add and close the box
• click on added case and add and give a details where the load case starts

• Click on analysis and run the file

5. RESULTS :

• Deflection :

• BEAM END FORCES OF THE PIERS :

• PLATE RESULTS IN MY DIRECTION :

FINAL RESULT

THE DEFLECTION BENDING MOMENT AND SHEAR FORCE IS DIFERRENT FOR THE DIFFERENT LOAD GENERATION