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

AIM

To design and analyze a hostel building situated in Guwahati using ETABS and SAFE

DESIGN CODE USED

The following design IS codes will be required for the reference

• IS 875 part 1
• IS 875 part 2
• IS 13920
• IS 1893
• IS 2911 part 2
• IS 456
• SP 34

REQUIRED DATA

The walls will be made of AAC blocks. Other loadings are to be calculated as per the architectural drawings

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

M25 grade of concrete with Fe500 for longitudinal reinforcement and Fe415 for shear reinforcement is to be used

PROCEDURE

• Open ETabs and edit the grids and story data

• Define the materials

• Define columns, beams and slab data

• Define the load cases

• Define the, mass source

• Define the diaphragms
• Now we draw the column, beams and slab in the model.

Beams

COLUMNS

SLABS

At the base, level assign the restrain

• Assign the load pattern

Seismic loads

According to code loads where assigned

Define live load as the surface load

Define the LOAD Combination

Design Model

• Draw the shear walls

• AAC load of 3.5KN/m used
• Check the response spectrum and analyze the model

• Calculating time period as per clause 7.6.2 of IS 1893

Tx=0.09/`sqrtd`=0.09*16.85/`sqrt67.7`=0.185sec

Ty = 0.415 sec

• Check the model so that model participating ratio should be greater than 90%. Hence it is OK

SAFE

• Open SAFE then load the ETabs file of this project
• Choose only the base and above in the ETabs model

Given data: Column size = 450*600mm

Pile load-carrying capacity = 280KN

Pile length = 16m, Dia of pile = 500mm

Soil bearing capacity = 150KN/m^2

E=25000KN/m^2

Area of pile = 196375mm^2

Spacing of pile = 1250mm as per clause 6.6.2 IS 2911

For X direction

Max. Reinforcement at top = 9041mm^2= 28no. 20mm dia

Max. reinforcement at bottom = 4038mm^2 = 13nos 20mm dia

For Y direction

For top max reinforcement = 3831mm^2 = 12 nos. 20mm dia

Max reinforcement at bottom = 4398mm^2 = 14nos. 20mm dia

• Define materials

• Define soil bearing
• Define pile cap
• Define load
• Draw the designated pile cap, columns

• Draw the design strips

• Start the analysis

After which we have done this project

RESULT

Design and analyze a hostel building situated in Guwahati using ETABS and SAFE is done