Abaqus Earthquake Analysis (2025-2026)

*AMPLITUDE, NAME=EQ, INPUT=Northridge.csv

This method provides an estimate of the (displacement, stress, etc.) of a structure to a given base motion or force. Instead of a full time-history, it uses a response spectrum, which is a graph of the maximum response of a single-degree-of-freedom system as a function of its natural frequency (or period). A response spectrum analysis is computationally efficient and widely used for design code checks. It provides a quick, conservative estimate of peak demands without the need to perform a full time-history simulation. abaqus earthquake analysis

Computes the exact time-varying response of a linear structure subjected to a specific ground motion record. It utilizes modal superposition to solve the equations of motion rapidly. Nonlinear Dynamic Methods *AMPLITUDE, NAME=EQ, INPUT=Northridge

(PDF) A Review on Nonlinear Time History Analysis of Structures It provides a quick, conservative estimate of peak

Based on experience and scholarly discussion, here are key best practices to keep in mind for your Abaqus earthquake analysis.

Abaqus excels at SSI analysis. A rigid base assumption is often insufficient for soft soils.