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

AIM : A 30 - 40hr project on modelling, analysis & design of a state-of-the-art tall composite building using ETABS software. The composite members to be designed using Comflor software.

Key Highlights:

a. Modelling

. The structural model prepared for the project 1to be used for the project 2.

. Prepare two distinct structural framing plans (location of primary & secondary beams) as discussed in Lecture 11.

. Create member definition for the steel sections by importing through library.

. Select deck slab profile and section using the Comflor Manual.

. Modelling of the composite metal deck section in ETABS

. Modelling of the composite columns in ETABS

. Create steel beam, steel column, bracing & core wall properties to be used further in the project. 

b. Loadings & Load combinations

. Comflor: Wet concrete and construction loads for the design of deck slab

. ETABS: Use load patterns and combinations created in project 1

. Definition of Pre-composite dead loads

. Define footfall loadings for the vibration checks.

c. Structural Analysis

. Comflor software to be used for the analysis of composite deck slab

. Obtain the shear force & bending moment diagrams for the floor beams and 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.

. Check natural frequency for the floor system and mitigate the floor vibration by keeping fundamental frequency > 3Hz.

d. Design of structural members

. Select appropriate design parameters for the pre-composite & post-composite behavior

. Check the effective length of the beams, considering the lateral restraint from the concrete topping.

. Shear studs & Composite deck design calculations

. Interpretation of the design results for the composite beam from ETABS

. Pre-camber criteria and requirements

Key Deliverables:

. Comflor file with the complete modeling of the slab with appropriate loadings

. Comflor report for the composite slab design (as PDF file)

. Manual calculation of the pre-composite & post-composite deflections.

. Manual calculation for the base reactions in gravity load cases (in excel/word document)

.Submit a ETABS model with the complete model of the composite structur

. The model should pass all design and serviceability requirements.

. A comprehensive project report from the ETABS software (as PDF file)

PROCEDURE :