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

A)

AIM: To design and analysis of G+3 hostel building in etabs and foundation in safe

Introduction:

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 – Hostel block in an academic instituteThe walls will be made of AAC blocks. Other loadings are to be calculated as per the architectural drawings.

The buildings rests on type 3 soil. Piles of length 10 meters and 500 mm diameter with a load-carrying capacity of 280 KN is to be used.

The ground floor level will be at a height of 2 meters above the existing site level to avoid floodwater enter the building.

M25 grade of concrete with Fe500 for longitudinal reinforcement and Fe 415 for shear reinforcement is to be used.

The following design IS codes will be required for reference:

IS 875 part 1
IS 875 part 2
IS 13920
IS 1893
IS 2911 part 2
IS 456
SP 34
Students will have to produce the following:

Etabs model for the two blocks on either side of the expansion gap
Foundation details illustrating the pile & pile cap reinforcement
Tie beam details connecting the pile caps
Column reinforcement
Framing plan for typical floor
Beam reinforcements for ground floor

Procedure:

first create etabs model

step 1: open the etabs software

click on built up option from instialisation window

then put all correcect code

like that

step 2) grid setting

set grid of X direction and Y direction accordingly plan as shoiwn below

now add storie data

like that

now our frame plan is ready on etabs screen

step 3) now define material property

go to define tab and select material option

click on add new material option

and add M25 grade concrete

and also rebar of fe415 and fe500 fck

our all material are shown below

step 4) section property

go to define

and click on frame section

then click on add new property

select rectangular section

and press ok

now for column

again add column of size 650X450

step 5) slab properties

go to define

then select slab section from section proprties

now also take 200 slab thickness seprate for staircase

our slab properties are as below

step 6) draw column using quick draw option

step 6)

draw beam B 450X650 to for all stories

by changing working plane as all stories

using quick draw beams

step 7) add slab using quick draw floor/wall option

step 8) now go to base plan from plan option

and select all joints

and assign restraint joint option from assign

step 10) now go for load pattern from define option \

then select EQX and click on modify lateral load, new tab will appear

in that select X direction as per IS 800-2002, seismic zone factor for guwahati, aasam is taken as 0.36 as mentioned below

select site type as 3

click Ok

similarly do for all seismic load

Step 11) now select floor for all stories to apply LL load on floor

go to select click on object in that slect floor

click on select button and click close

then click to assign option assign option select shell load, from shell load select uniform option

and click ok

step 12) assign load on beam

select object type option then select beam and click on select button

and then close it

now click on assign option and then select frame load

click on sistributed load option

step 13) mass source

from define option select mass source

as shown below

in that click on modify mass source

in that add load pattern in mass source data

like that

step 14) load combination

select load combination from define option

in that click on add default design combos

in that click on concrete frame design

step 15) select floor for diaphram

select option then object type then floor

then select diphram from shell option from assign

then click on D1 press apply and then close

diphram is assign to slab

step 16) Run analysis

Step 17) now beam design and column design by selecting start design option

after that we select display design information from design option

also check for shear reinforcement

and for column we need 2340 sq.mm reinforcement required

step 18) export base floor load and load from above in safe

SAFE model (foundation Design)

step 1) after exporting etabs model to safe then open the safe and import file

step 2) now show load from display option

dead above load

Step 3) given in question

soil type = 3

piles of length = 10m

pile dia = 500mm

load carrying capacity = 280KN

pile cap = slab type = mat = 500mm thick

column cap slab = stiff 500mm thick

so firstly define the slab property

Step 4) define slab property

step 5) RC beam section of tie connection of foundation is 600X500mm is assigned

step 6) for piles the point springs are assigned

step 7) for bearing pressure checking the service load combination is considered

for flexural design the ultimate load combination is considered

Step 8) Define the soil
.

step 9) Draw the points for the reference of the pile

Step 10) draw piles And assign the point springs
.
.

step 12) Draw columns below the loads

step 13) Run model Display the deflection
.

Step 14) Reactions
.

Step 15) Punching shear

Step 16) Design reinforcement
Since load was heavy the model divided to 3 pasts and analysis was done
.
.

.

Result:

G+3 Hostel building design and analyse is done in etabs &

the foundation design and analysis in safe also done