Week 11 Challenge
- Design the slab and foundation of the model. Outline the thought process for designing of the elements (column, beam, slab and foundations)
- In the design first we assume certain size of the element based on experience.
- The size of the element may be dependent on the loads,type of the structure and usage od the structure.
- The assumed size for any element is checked for the resistance to consider the load that is passed on it.
- The load passed on th element should accept it and the element should retain the loading.
- If the element is failed or unable to accept the loading then we will redesign the element.
- This process is continous until we have obtained an acceptable design with optimization as well.
The thought process involved in checking the design is
Design Force>Required Force
Every element should follow this rule to get passed.
The diffferent checks involved in each element are:
For Beam:
- Axial Force
- Bending Moment
- Shear Force
- Span to effective Depth Ratio
- For reinforcement check
- Development length check
- Nominal cover
For column:
- Axial Force
- Bending Moment
- Shear Force
- Minimum reinforcement check
- Maximum reinforcement check
- Splicing length check
- Effective length to least dimensional ratio
- Nominal cover
For Foundation:
- Here the foundation we provide is pile foundation.
- Axial load ratio
- Bending moment
- Shear check
- Spacing between piles
- Dia of the piles
- Length of the piles
For Pile Caps:
- Thickness of pile cap
- Minimum reinforcement check
- Maximum reinforcement check
- Column punching shear
- BAr spacing
- Limiting ratio
- Nominal cover
For Slab:
- Nominal cover
- Minimum reinforcement check
- Maximum reinforcement check
- Bar spacing
- Shear check
- Bending moment
All the above checks are obtained only after analysis is completed.
For the Analysis
1. All the load are created.
2. From the loads we genearte load combinations.
3. Load combinations by using combination generator.
4. First order linear analysis is performed.
Design of Foundations:
Pile Foundations are of different types.
Based on Shape:
a) Circular
b) Sqaure
Base on Bearing:
a) End bearing pile
b) Friction pile
Pile Cap
After creating the Pile Cap,right click on the pile>design member and then it is observed for checks.
Pile
Here in our design circular pile with End Bearing Capacity is selected.
- The design starts with selecting a approximate Pile cap provided with reinforcement in both the directions.
- The Depth of the pile is designed.
- The number of piles to be provided are calculated..
- The length of the pile is designed.
- The diameter of the pile is designed.
- The spacing of the pile is provided 2.5 times to the dia of the pile.
- So in this way we provide for each column the pile caps and piles.
The checks for the Pile for different load combinations are shown below:
Load summary details
For the Analysis of service and strength of pile
Foundations details are provided below
Nominal Cover for the pile is noted here
Pile Axial Capacity is checked here
Bending Capacity is checked here
Limiting Parameters are checked
View of Pile caps in 2D
All the foundation have passed
Foundation Utilization ratio is within range
All the piles have passed
Piles Utilization ratio check
View of Piles and Pilecap in 3D
Model in 3D with pile foundation
Design of Slabs:
View of Slabs with loading in 2D
Slabs:
After creating the slab:
Right click on the slab>Design member
Then it is observed for the checks.
Details of slab is mentioned here:
- Two way slab
- Slab on beams
- Depth of slab=200mm
1st Floor Slab passed
Roof Floor Slab Passed
