pyStrata — The Complete Guide: One-Dimensional Seismic Site Response in Python

pyStrata is an open-source (MIT) Python library for seismic site response analysis. It computes how bedrock motion is amplified or reduced on its way up through the soil layers to the ground surface — a key input for seismic hazard assessment and for the design of foundations and structures.

pyStrata

Albert Kottke

One-dimensional seismic site response of a soil column — equivalent-linear, time series and RVT, in Python.

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What you get

Equivalent-linear analysis — including a frequency-dependent version.
Linear analysis — for simple cases and comparison.
Time series — runs on acceleration records.
Random vibration theory (RVT) — work with a spectrum instead of records.
Batch runs — large sets of soil profiles in one script.

Who it suits

The library aims to implement many of the features of the Strata program in script form, and that is its strength: you can run hundreds of profiles and explore uncertainty without repeating manual work. It has no graphical interface, so it suits geotechnical and earthquake engineers and researchers who write Python.

Related tools

For regional seismic hazard assessment — OpenQuake Engine. For nonlinear analysis of structures and soil — OpenSees. For writing the scripts — Python.