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Project 2_Design & Analysis of a Hostel building at Guwahati, Assam

In this project, participants will get to experience the entire design process from modelling, analysis, design, and preparation of construction drawings. The architectural drawings of a G+3 RCC building is provided. The following information on the building is to be used: Location – Guwahati, Assam Function –…

Punitharanganathan M
updated on 19 Apr 2022

Location – Guwahati, Assam
Function – Hostel block in an academic institute

AIM :

To this project, participants will get to experience the entire design process from modelling, analysis, design, and preparation of construction drawings. The architectural drawings of a G+3 RCC building is provided. The following information on the building is to be used

INTRODUCTION :

SAFE is the ultimate tool for designing concrete floor and foundation systems. From framing layout all the way through to detail drawing production, SAFE integrates every aspect of the engineering design process in one easy and intuitive environment. SAFE provides unmatched benefits to the engineer with its truly unique combination of power, comprehensive capabilities, and ease-of-use.

This course is about foundation and slabs, you will learn how model and analyse and design:

Isolated footing
strip footing
combined footing
strap beam
Pile caps
Eccentric footing
Raft
Check punching
drop panel
import loads from etabs
Import from Autocad
Solid slab
long term deflection
flat slab
Ribbed slab
Beam
Capital and drop panel

PROCEDURE :

STEP 1:

Open the Etab software
On the left side top corner select the new model as shown below
After click the new model there open the model initialization dialouge box
In the box we can see a 3 option and then select the last option
Set the unit as " METRIC SI " and set the steel section data base as " indian " and set the code as 800:2007 for 3rd option. finally set the code 456:2000 for last option
After finishing the previous process then open new model quick template opened automatically
we can set the grid dimension as custom and also the story dimension
Next we can set the number of storys and height of the story in x grid data
And also same the process in y grid data and then ok
Next we open the story data and we need to add the story data upto 09 story and then added story data as shown below in picture
And we give the name for the story as base, GF , story1, story2...3, TE, mumty level.
And set the height of the GF as 2.4m and other all as 3.45m
Then set the all story similar to story 1, except GF
Finally click ok
The model will be created sucessfully and the image shown below

STEP 2:

Next we go to the define option and select the material properties
Then there open a define material box and select the add new material option
And select the region "INDIAN" , material type "concrete", standard "INDIAN", grade "M25"
then click ok
After here opening the material property data box
Set the material name like M25
Then material type "Concrete"
Others are automatically update with using code given
Finally click ok
Again click the add new material
again set add new material properties
Here we can set the matrial properties as "rebar"
Make them two types of material grade 415 and 500

STEP 3:

Next go the define option and select the section properties and go to the frame section
Select the concrete rectangle and click ok
And set the material name as (B400 X 500) and material "M25"
Go to the modify show rebar
And set the design type M3 beam and give the rebar material as HYSD 500 at top and HYSD 415 for bottom
And then click ok
Again Select the concrete rectangle and click ok
And set the material name as (B400 X 550) and material "M25"
Go to the modify show rebar
And set the design type M3 beam and give the rebar material as HYSD 500 at top and HYSD 415 for bottom
And then click ok
Next we can open the same concrete rectangle and select the column in here
And set the material name as (C650 X 450) and material "M30"
Go to the modify show rebar
And set the rebar as HYSD 500 at top and HYSD 415 at bottom
Finally click ok
Again we can open the same concrete rectangle and select the column in here
And set the material name as (C650 X 650) and material "M30"
Go to the modify show rebar
And set the rebar as HYSD 500 at top and HYSD 415 at bottom
Finally click ok

STEP 4:

Go to the define tab and select the section properties and then select the slab section
After there open a slab properties box
and click modify option and then set properties name "slab 150"
Give the slab material " M25"
And modeling type " membrane"
Give the thickness of slab as 150mm
Finally click ok
Go to the define and select the load patterns
set or make the loads like EQX, EQY,EQX+, EQX-, EQY+, EQY-
Give the IS code value for EXQ, EXY,EQX+, EQX-, EQY+, EQY-
Taken the both load and set the (DIRECTION AND ECCENTRICITY)
EXQ - only select the x-dirction
EXY - only select the y-dirction
Set other as given below image
And set the seismic zone factor for per code as per the rule of code book (0.36)
And set the site type as (II)
This process is same for both the EQX, EQY,EQX+, EQX-, EQY+, EQY-
Go to the load cases and check once
Taken the define option and select the mass source
After opening the mass source dialouge box
Just give a modify option to modify it
Just select only the specify load pattern and other then unselect it
And give the load patterns as dead load, live load, wall load, finisher load
Give the value of the dead load, finisher and wall load as (1)
give the value of live load as (0.25)
Then click ok

STEP 5:

Finally use the left icon items to place the slab, beam, column
Go to the base plan delete all the slabs and beams ,columns
And select all points and assign the joint --> restraint ---> first option and click ok
After finishing the all load assigns
Just click the run analysis option
After complete the analysis go to the story responce option and check the story drift graph for all EQX and EQY
And click concrete frame option and click check design model
And go the file option and go to export option
export to story safe V12 file

STEP 6:

Open the safe software
And go to the file option
select the import and select the safe F2K file
After import the file
Go to the display option and select show loads
Select all the grid points
Select the dead above option and then click ok

STEP 7:

Go the define option and select the material properties
give the name Fe500 and set material type as rebar
The value of material weight as 77
The uniaxial data value as 200000
Give the other properties of material values are 500 and 545
And then click ok
Go to the slab properties data
And give the propertie name as footing
give the slab material as M25
Select Type as footing and thickness as 450
Again go the slab properties data
And give the propertie name as column
give the slab material as M25
Select Type as stiff and thickness as 450
Next go the soil subgrade properties
And create the new data
the name as soil 150
And soil modulus as 18000
And then click ok

STEP 8:

Select the "quick draw areas around point "
give the shape of the object as rectangle slab
give the properties as footing
give the value of X AND Y direction as 2.5
And draw the slab with using grid points
here we using the 3 different type of slabs
One as given below another type of slab size as (6.5, 4.5) and (6.5,6.5)
And place the column as using same process
using the column size as 0.6,0.6
And set the soil sungrade properties
Use the draw point option and place the point in the footing for make piles
after finishing the point placing just select all the corners points to make circular slab
And assign the point load and point spring for all the footing
and assign the beam at all the grids
right click the all slabs and set the materilas as (fe500)