🎥 PLAXIS 2D Tutorial 17 – Free Vibration and Earthquake Analysis of a Building (Step-by-Step)

🎥 PLAXIS 2D Tutorial 17 – Free Vibration and Earthquake Analysis of a Building (Step-by-Step) #tutorial #simulation #earthquake #dynamic #vibration #GeoAutoTools #Plaxis Plaxis 2D Tutorials Playlist:    • PLAXIS 2D in 10+ Mins - From Beginner to E...   Plaxis 3D Tutorials Playlist:    • PLAXIS 3D in 10+ Mins - From Beginner to E...   Free Vibration and Earthquake Analysis of a Building for Plaxis 3D Tutorial:    • 🎥 PLAXIS 3D 2025 Tutorial 9 – Free Vibrati...   This tutorial reproduces Tutorial 17 from the official PLAXIS 2D Tutorial Manual: “Free vibration and earthquake analysis of a building.” The example demonstrates the dynamic response and natural frequency of a five-storey building subjected to free vibration and earthquake loading, using different dynamic boundary conditions for the two analyses. ⚠️ Disclaimer: This is not an official PLAXIS or Bentley Systems tutorial. It is an independently created educational walkthrough. All copyrights and trademarks belong to their respective owners. Download Earthquake file .smc ➡️ https://geoautotools.com/file-downloa... 📌 Why this tutorial is important: ✅ Demonstrates dynamic analysis of soil–structure interaction ✅ Shows free vibration and earthquake loading analysis ✅ Introduces viscous, free-field and compliant base boundaries ✅ Demonstrates earthquake loading using dynamic multipliers ✅ Uses the Hardening Soil model with small-strain stiffness ✅ Evaluates natural frequency using a Fourier spectrum 📚 Tutorial Overview: This tutorial investigates the dynamic behaviour of a five-storey building with a basement. Two dynamic analyses are performed: free vibration and earthquake loading. For free vibration, viscous boundary conditions are used because the dynamic source is located inside the model. For earthquake loading, Free-field and Compliant base boundary conditions are applied so that the seismic input can be introduced at the bottom of the model. The soil is modelled using the Hardening Soil model with small-strain stiffness to represent hysteretic soil behaviour. The natural frequency of the building–soil system is evaluated using a Fourier spectrum. 🧠 You will learn how to: Define a Dynamic calculation in PLAXIS 2D Define viscous, free-field and compliant base boundaries Apply earthquake loading using dynamic multipliers Model free vibration of structures Use the Hardening Soil model with small-strain stiffness Analyse soil–structure interaction under dynamic loading Determine natural frequency using Fourier spectrum analysis 📐 Model Description: Structure: 5-storey building with basement Building width: 10 m Total building height including basement: 17 m Above-ground height: 15 m Basement depth: 2 m Floor and wall load: 5 kN/m² Upper soil layer: 15 m of relatively loose sand Deeper soil layer: Dense sand Deep sand included in model: 25 m Dynamic analyses: Free vibration and earthquake loading 🧪 Validation: ✅ Based on the official PLAXIS 2D Tutorial Manual ✅ Demonstrates different dynamic boundary conditions for different excitation sources ✅ Excellent reference for seismic and structural vibration analysis in PLAXIS 2D 🌐 For more advanced geotechnical FEM tutorials and automation tools, visit GeoAutoTools.com