ETABS Software Training

Introduction

• Software: ETABS
• Purpose: Learn ETABS for modeling and analyzing structures, specifically a residential building.
• Structure: Ground + one-story residential building
• Material: Architectural plan, structural engineer's beam-column layout
• Training Format: Divided into 8 steps

Steps to Create a New Model

1. Open ETABS: Create a new model via the file menu or New Model button.
2. Default Settings: Choose either default settings or custom units suitable for your country.
3. Design Codes: Use ACI 318-14 for concrete and AISC 360-10 for steel.
4. Grid and Story Data: Importance and Setup
   • Grid Lines: Central reference lines for structure.
   • Uniform and Custom Grid Spacing: Choose custom grid spacing for non-uniform grids.

Defining Grids and Story Data

• View Layout: Beam and Column Plan
• Dimension Assignment: Input dimensions for each grid (e.g., 5'4.5" between Grid 1 and Grid 2).
• Story Data: Include foundation, plinth level, first floor, and roof level (based on given architectural sectional plan).

Defining Material and Section Properties

• Concrete and Steel Properties: Define materials like concrete (e.g., 3000 psi) and different types of steel bars.
• Sections: Define sections for columns (rectangular, 12" x 12"), beams (24" x 15"), and slabs (6" thickness).
• Modifiers: Set properties like torsional constant as per ACI codes.

Modeling Structure Elements

• Draw Columns, Beams, Slabs: Utilize tools for quick drawing; select properties previously defined.
• Assign Columns and Beams: Match the layout plan for accuracy.
• Apply Slabs: Use property menu; adjust for different levels.

Staircase Addition

• Staircase Modeling: Details of risers, treads, and intermediate landing slabs.
• Mesh and Load Application: Calculate step loads and apply corresponding dead and live loads.

Load Assignments

• Types of Loads: Gravity (dead, live) and lateral (wind, seismic).
• Load Calculations: Refer to code books (e.g., IS 875, ASCE for live and dead loads).
• Application: Uniformly assign via the Assign menu. Calculate and add wall loads, slab loads, and story data.

Seismic and Wind Loads

• Seismic Loads: Define using codes (e.g., IS 1893 for Indian standards, ASCE 7-16 for American standards).
• Wind Loads: Apply as per exposure categories and regions (e.g., urban areas as Exposure B).
• Auto-Meshing and Manual Meshing: For precise load distribution.

Analysis and Design

• Verify and Run Analysis: Implement fixed supports, run the analysis via Analyze menu.
• Review Displacements: Check deformations under different load cases.
• Reaction Forces: Analyze using support reactions.
• Story Drifts: Review maximum allowable displacements as per code requirements.

Results Interpretation and Verification

• Moment, Shear, and Axial Forces: View diagrams to ensure correct load distribution.
• Column and Beam Design: Check percentage reinforcement, follow ACI codes.

Next Steps

• Upcoming Tutorial: Will cover creating drawings and documenting the design data.
• Presentation: How to showcase design calculations and results in forms easily interpretable by stakeholders.
• Final Note: Encourage practice and review, engagement via comments and questions, and subscription to the channel for updates.