Project 2_Design & Analysis of a Hostel building at Guwahati, Assam
aim to analyze the design of hostel building located in guwahathi assam.
Here we will be using three different software in order to design and analyze the hostel
building:
ETABS: We will be using ETABS software in order to model, analyze and designing the
superstructure of the hostel building.
SAFE: And we will be using the SAFE software in order to model, analyze and design the
foundation of the building.
AutoCAD: And we will be going to use AutoCAD software for the reinforcement detailing an
creating construction drawings using the AutoCAD software.
So above software we will be going to use to design and analyse the hostel building
procedure
in this project we will going to 3 different software etabs safe and autocad.
first we will going to work on etabs software for the designing and analysing and for modelling this building as super
structure
so lets started the etabs software
etabs modelling
in order to design and analyze the hostel building first thing that we have to do is to open
the ETABS software.
After opening the ETABS software there will be an option called New model click on that
After clicking that option there will be a dialogue box named as Model Initialization and inthat dialogue box fill the
necessary data regarding the codes that we are going to use to
design the given hostel building just as shown in the below given image:
New model has been opened, so after opening the model now we have to edit the story
data and the grid data accordingly.
After that there will be another dialogue box named as New Model Quick Templates, in that
dialogue box there will be another option called Custom Grid Spacing check on that option
after that there is another option called Edit Grid Data just as shown in the below given
And now there will be another dialogue box named as the Grid System Data, in that
dialogue box provide the grids in both the direction according to the give architectural pla
as shown in the below given
After this there will be another dialogue box named as the Story data, in that dialogue box
edit the number of stories and the stories height and other relevant data just as shown in
the below given
After setting the grid system and the story data this is how it will be looking like in the plan
view and the 3D view, below is the given
After this now we will be defining the Materials and the Section Properties.
So in order to assign the materials we first need to go to the Define menu then there will be
another option called Material Properties click on that option just as shown in the below
given
After that there will be another dialogue box named as the Add New Material Property in
that dialogue box fill the all appropriate data in that dialogue box.
Region - India.
Material Type - Concrete.
Standard - Indian.
Grade - M25.
After adding M25 now we have to add the rebar material, so i order to do that go to the
Define material dialogue box click on the option Add New Material just as shown in the
below given image:
After this there will be another dialogue box named as the Add New Material Property in
that dialogue box fill the all appropriate data in that dialogue box.
Region - India.
Material Type - Rebar.
Standard - Indian.
Grade - HYSD Grade 415.
After this there will be another dialogue box named as the Add New Material Property in
that dialogue box fill the all appropriate data in that dialogue box.
Region - India.
Material Type - Rebar.
Standard - Indian.
Grade - HYSD Grade 500.
Now that all the materials have been added in the list now we have to define the section
properties.
So in order to define the section properties just go to the Define tab there will be a drop-
down list and in that list there will be an option called Section properties click on that optio
after that there will be another drop-down list in that list there will be another option called
Frame Sections just click on that option just as shown in the below given
After this there will be a new dialogue box named as the Frame Properties, in that dialogue
box there is an option called Add New Property just click on that option as shown in the
below given
Now we will be adding the sections properties like beam, columns etc.
COLUMN (450 mm X 650 mm):
So after clicking on the option Add New Property there will be another dialogue box named
as the Frame Property Shape Type, in that dialogue box choose the shape of the column
here I will be choosing rectangular shape and then just click OK just as shown
Fill out the relevant data in this dialogue box just as shown below:
General Data:
Property Name : Column450X650.
Material : M25.
Section Dimension:
Depth : 650.
Width : 450
In that dialogue box there is another option at the right-side of screen and that option is
Modify/Show Rebar just click on that option then there will be another dialogue box named
as Frame Section Property Reinforcement Data, in this dialogue box fill the data just as
shown in the below given image
property stiffness of the material
BEAM 250mm X 300 mm:
So in order to add the beam into the list then go to the Frame Properties, in that dialogue
box there is an option called Add New Property just click on that option as shown in the
below given
Fill out the relevant data in this dialogue box just as shown below:
General Data:
Property Name : Beam250X300.
Material : M25.
Section Dimension:
Depth : 300.
Width : 250.
Now that the column and beam of their respective sizes have been added to the list now
we will be adding the slab property into the model.
SLAB 150 mm Thick:
And now we will be adding the slab, and to add the slab first due to the Define menu then
there will be a drop-down list in that list there will be an option called Section Properties
and then there will be another drop-down list in that list there will be another option called slab properties just click
that option just as show in the below
Fill the data just as given below :
General Data:
Property Name : Slab150.
Slab Material : M25.
Modelling Type : Membrane.
Property Data :
Type : Slab.
Thickness : 150mm.
And for the staircase we will be providing slab of 175mm thickness, and to add the slab for
the staircase we will have to add the new property and then fill out the all relevant data .
After adding the section properties now we will be drawing slab, columns and the beams in
the given plan by using quick draw tool which is provided in the software
columns
inplan view
in 3d view
beams
inplan view
slab
in plan view
3d view plan
And now we will be assigning the load patterns:
Below are the given images of assigned loads:
load pattern
In order to assign the loads we need to go to the Assign menu bar in that there will be a
drop-down list in that list there will be an option called Shell Loads and then there will be
another drop-down list in that there will be another option Uniform just click on that option
just as shown in the below given
Then there will be a new dialogue box named as the Shell Load Assignment-Uniform, in tha
dialogue box Fill the all relevant data.
Now select the floors and add the Live loads to the structure.
Here we will be providing 2 KN/sq.m as a live load for the rooms and the dormitories of the
hostel building according to the IS 875 part 2 for the residential building.
As per the IS code for the hostel building:
Living Rooms, Bedrooms and the Dormitories: 2 KnN/sq.m.
Kitchen and Laundries: 3 KN/sq.m.
Public Lounges: 3 KN/sq.m.
Store Rooms: 5 KN/sq.m.
Dining Rooms, Cafeteria and Restaurants : 4 KN/sq.m.
Office Rooms : 2.5 KN/sq.m.
Bath and toilets : 2 KN/sq.m.
Corridors, Passages and Staircase : 3 KN/sq.m.
Balconies : 4 KN/sq.m.
live load
live load for terrace
floor finish
aac block loads
AAC LOAD FOR TERRACE
Now we will be assigning the loads now we will be definning the Mass source,Mass Modal
and the Response Sprectrum Function:
In order to define the mass source the first thing that we need to do is that go to the Define
option and there will be a drop-down list in that list there will be an option called Mass sorce
mass source
After assigning the mass source we will be assigning the Modal case.
And in order to do that first go to the Define menu then there will be drop-down list in that
list there is an option called Load Cases just click on that option just as shown in the below
given image
And now we will be defining the Diaphragm.
Firstly select all the floors and then assign Diaphragm.
So in order to assign the diaphragm, we first need to go to the option Assign then there will
be a drop-down list in that list there is an option called Shell click on that option then there
will be another list in that list there will be an option called Diaphragm just click on that
option just as shown in the below given image:
Response Spectrum just click on that just as shown in the below given image
After that there will be another dialogue box named as the Response Spectrum Function
Definition- IS 1893-2016, in that dialogue box just fill the relevant data just as shown in the
below given image:
And now we have to define the Load Cases, in order to define the load cases first go to the
define option then there will be a drop-down list in that list there will be an option called
Load cases just click on that option just as shown in the below given
load cases
RESPONSE SPECTRUM
LOAD COMBINATION
Then there will another dialogue box named as the Add Default Design Combinations, in
that dialogue box click on the option Concrete Frame design and Convert to User
Combinations (Editable) just as shown in the below given
RUN ANALYSIS
model response check
story drift factor
base reaction
complete design
concrete frame design
longitudinal steel reinforcement
shear reinforcement
- Go to any elevation view
- Click display frame icon and select combination as service and component as Axial.
- To check Bending moment:
- With the above same setting change the component to Moment 3-3.
- To check Bending moment:
- With the above same setting change the component to Moment 3-3.
And now we will be moving to the last part of the designing that is foundation designing
using the SAFE software
SAFE SOFTWARE:
First we need to export the file from the ETABS software.
Then there will be another dialogue box name as Options for Export to SAFE, in that dialogu
box fill the details just as shown in the below given
- Go to Base plan view.
- Go to file -> Export -> Storey as SAFE V12.f2k file
- Select the following options with the service load combination and click ok.
-
Modeling Pile foundation for grid 6F:
- Here, Picking a grid 6F to model in safe. The same procedure can be followed for the remaining columns/ grid areas.
Data required for SAFE analysis and Design.
- Unfactored load = 1155.8KN
- Point spring of pile = AX E/ L =490873.75 N/mm
- A= π/4 xd2= π/4 5002 = 196349.5 mm2
- E = 5000x√fck =5000x √25 = 25000 N/mm2
- L =10M=10000mm
- Hence K = 490873.75KN/m.
- Rebar yield strength, Fy =500 N/ mm2.
- Rebar ultimate strength, Fu = 545 N/ mm2.
- Elastic modulus of M25 concrete = 25000 N/ mm2.
- Number of piles required = Unfactored load with self-weight / Individual pile capacity.
- =1155.8 X1.1 / 280 = 4.5
- Consider 6 piles for symmetric placement of piles under pile cap.
- Center to center distance between the piles = 2.5 x Pile diameter = 2.5x500= 1250 mm
- Edge distance from the pile center =1x500= 500mm.
- Assume pile cap depth = 500mm
- Column 450x650mm
- plan view of foundation
After that there will be another dialogue box named as the Define Materials, in that
dialogue box there ia an option called Add New Material just as shown in the below given
After this there will be another dialogue box named as Add New Material Property, in that
dialogue box fill the data just as shown in the below given
Here the material property for concrete has been added successfully into the list.
Now we will be adding another property for the rebar.
HYSD 500:
Once again go to the dialogue box the Define Materials, in that dialogue box there is anoption called Add New Material just as shown in the below given
And now we will be adding the section properties.
So in order to add the section properties first we need to go to the define bar then there wil
be a drop-down list in that list there is an option called Section Properties click on that
option from the list after that there will be another list named as the Slab Section just click
on that option just as shown in the below given
Then there will be another dialogue box named as the Slab Property Data, in that dialogue
box fill the data just as shown in the below given
PILES of 500 mm Diameter
stiff column section
to draw pile cap
To place points:
- Select edge point of the Pile_cap point
- Go to Edit-> Replicate and give the distance.
After that we have to define the Point Spring property and in order to do that just go to the
option Define and then there will be a drop-down list and in that list there is an option
called Spring properties click on that option and after that there will be another list in that
list click on the option Point Spring just click on that option as shown in the below given
After this there will be another dialogue box named as the Point Spring Properties, in that
dialogue box there is an option called Add New Property just as shown in the below given
image
And then there will be another dialogue box named as Point Spring Property Data in that
dialogue box fill the data just as shown in the given
- Select all 6-pile joint point, Go to Assign -> Joint -> Spring
-
Assigning load to the column:
- Select the column point
- Go to Assign ->Joint loads -> Force.
- Add both live and dead loads in Z direction as shown below.
- load combination
- To add ultimate limit state and service combination, go to Define -> Load combination.
-
Add Design strip:
- Go to Draw -> Draw Design strip.
- Enter the value in the properties of object.
- The width can be the diameter of the pile on either side.
- Right click on the strip and change the rebar property to HYSD 500.
-
- To view the width, go to set view option ->other assignments -> show width.
- run the analysis
- Two-way shear check (Punching shear):
- Click Display-> Punching shear design.
-
- It is less than 1, hence ok.
- Reaction check:
- Click Reaction icon and select combination as Service.
-
- Reactions are less than the pile capacity. Hence ok.
Settlement under Service load:
- Go to Display -> Show deformed shape.
- Select the combination as service.
Flexural reinforcement design for footing slab:
- Click Display -> Show slab design.
- Reinforcement details can be calculated from this.
