Project 1 - MODELLING, ANALYSIS & DESIGN OF TALL BUILDINGS IN ETABS

AIM:

• To model a tall building in ETABS for the given architectural drawing along with the given parameters and to design their frame elements.

PROCEDURE:

1. Modelling

• To comprehend the architectural plan provided by the architect and look-out for the key information from the drawings.

• Import the architectural floor plan (provided by the architect) in ETABS model to start with the modelling.

• Create grid lines, story levels & story heights to set-up a project.

• Create material definitions for the concrete, rebar & structural steel

• Create slab, beam, column & wall properties to be used further in the project.

• Model typical floor plate using shell & frame elements as indicated in architectural plan.

1. Loadings & Load combinations

• Define load patterns for gravity cases

• Define load patterns for the lateral load cases using the wind & seismic parameters provided.
• Create service & ultimate load combinations as per IS 456:2000

• Define mass source for the earthquake loads

1. Structural Analysis

• Obtain the shear force & moment diagram for the floor beams & columns

• Check the gravity load path in the structure if it follows the designer’s intent.
• Perform quick hand calculations to confirm the base reactions for the gravity load cases.

1. Design of structural members

• Select appropriate parameters for the design of the members

• Interpret the design results

• Re-design and restrict the member utilization within 0.9
• Identify the reinforcement requirements for each structural member

Key Deliverables:

• Manual calculations for the base reactions in gravity load cases
• This is verified with the ETABS live load base reaction result as given below.

Floor area of each level = 644.28 m^2

Live load assigned = 3 kN/m2

Total live load at each level = 644.28*3 = 1932.84 kN

Overall live load in the tall building = 25 story x 1932.84 = 48321.0 Kn/m^2

RESULT:

• Thus a tall building with all given parameters and for the given architectural drawing is modelled and designed. Also detailed ETABS report, model working file are attached in the submission.