Project Overview

The ETABS Extension Suite is a collection of productivity tools and automation plugins designed for structural engineers working with ETABS (Extended Three-Dimensional Analysis of Building Systems). This project bridges my structural engineering expertise with software development skills to create tools that solve real-world engineering challenges.

Core Objectives

  • Automate Repetitive Tasks: Eliminate manual, time-consuming operations
  • Enhance Accuracy: Reduce human error in design calculations
  • Standardize Workflows: Implement consistent design procedures
  • Generate Reports: Automated documentation and calculation sheets
  • Integrate with CAD: Seamless workflow between ETABS and AutoCAD

Key Features

1. Automated Design Tools

Beam Design Automation

  • Automatic beam sizing based on load combinations
  • Code compliance checking (ACI 318, TCVN 5574, Eurocode 2)
  • Reinforcement detailing and scheduling
  • Deflection and crack width verification

Column Design Assistant

  • Interaction diagram generation
  • Biaxial bending analysis
  • Slenderness effect calculations
  • Automated reinforcement arrangement

2. Model Generation Tools

Grid System Generator

  • Parametric grid creation with custom spacing
  • Automatic story definition
  • Mass assignment for seismic analysis
  • Load pattern setup

Foundation Designer

  • Isolated footing design and detailing
  • Mat foundation analysis
  • Bearing capacity verification
  • Settlement calculations

Technical Implementation

Architecture Overview

The extension suite follows a modular architecture built on the ETABS API:

// Core extension structure
public class ETABSExtensionCore
{
    private cOAPI ETABSObject;
    private cSapModel SapModel;
    
    public ETABSExtensionCore()
    {
        InitializeETABSConnection();
        LoadModules();
    }
    
    private void InitializeETABSConnection()
    {
        ETABSObject = new SAP2000v1.SapObjectClass();
        SapModel = ETABSObject.SapModel;
    }
}

Key Technologies

Primary Development Stack:

  • C# .NET Framework 4.8: Core development language
  • ETABS API: COM-based interface for ETABS integration
  • Windows Forms: User interface development
  • Microsoft Office Interop: Excel/Word report generation
  • AutoCAD .NET API: CAD drawing integration

Documentation & Reporting

Calculation Sheets

  • Automated design calculation generation
  • Code reference integration
  • Professional formatting with company branding
  • PDF export capabilities

Drawing Generation

  • Reinforcement detail drawings
  • Section schedules and tables
  • Plan view annotations
  • AutoCAD integration for final drawings

This tool represents the intersection of structural engineering expertise and software automation, demonstrating how programming can enhance engineering workflows and productivity.

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