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

Aim: To provide the analysis in ETABS and Safe for the architectural drawings of a G+3 RCC building

Introduction:

• Location – Guwahati, Assam
• Function – Hostel block in an academic institute
• Type 3 soil
• Length of pile = 10m
• Diameter = 500mm
• Load carrying capacity = 280KN
• M25 grade of concrete
• Fe500 for longitudinal reinforcement and Fe 415 for shear reinforcement

Softwares Used:

• ETABS
• SAFE
• AutoCAD/Paint

Code books used:

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

Procedure:

Step 1:

• Open ETABS software
• Click File and select new model
• Choose the metric system and code details
• Click OK

Step 2:

• Edit the grid data as per requirement

Step 3:

• Edit the Story data and click on refresh view

Step 4:

• Go to Define>material properties>new property
• Add M25 for Concrete
• Click OK

Step 5:

• Go to Define>material properties>new property
• Add Fe415 of steel rebar for Shear reinforcement
• Click OK

Step 6:

• Go to Define tab>material properties>new property
• Fe500 of steel rebar for longitudinal reinforcement
• Click OK

Step 7:

• Go to Define>section properties>new property
• Add column 450 x 650
• Click OK

Step 8:

• Go to Define>section properties>new property
• Add column 650x450
• Click OK

Step 9:

• Go to Define>Slab section property>add new property
• Add Slab 150
• Provide the thickness as 150mm
• Click OK

Step 10:

• Go to Define tab>frame property>new property
• Add beam size of 450x450
• Click OK

Step 11:

• Assign the beams and columns using draw tool

Step 12:

• Assign the slabs to model

Step 13:

Load case:

• As per IS 875 Part 2, live load of hostel building room is 2 kN
• Brickwall load as 3.5kN and Finishing load as 1.2 kN

Step 14:

• Go to define>load patterns
• Add new load as Brickwall, EQX with both positive and negative eccentricity as per IS 1893:2016
• Similarly add EQY with positive and negative eccentricity

Step 15:

• As per IS 1893:2002, zone factor for Guwahati, Assam is 0.36 and it is 5th zone

Step 16:

• Modify the zone factors as per IS code

Step 17:

• Assign the Mass source data

Step 18:

• Go to define>frame load>distributed
• Assign brickwall load

Step 19:

• Apply the assign loadings to the model

Step 20:

• Apply the assigned Live load

Step 21:

• Run the analysis
• Check the model
• Ast values for both beam and reinforcement

Step 22:

• Export the Etabs model as SAFE.f2k file

Step 23:

• Run the analysis
• Click on Punching shear design/check
• Slab size is increased due to some of the values greater than 1

Step 24:

• Reinforcement details of slab for D(2,3) pile cap in x&y directions

Result: The architectural drawings of a G+3 RCC building is designed in ETABS and SAFE software as per the requirement