NONLINEAR-INELASTIC MULTI-AXIAL TIME RESPONSE ANALYSIS OF SDOF OSCILLATOR

Robust MatLAB function for nonlinear-inelastic time-history analysis of SDOF oscillator subjected to multi-axial simultaneous excitation including horizontal, vertical and rotational motions. It also computes components of seismic input energy imparted to SDOF oscillator.
The main features are:

- Multi-axial excitation
- Material nonlinearity is presented by Ozdemir's rate-independent force-displacement model
- P-Delta (global level) is included
- Absolute and relative energy components computation

Syntax: nonlinearSDOFmultiAxial

Acknowledgement:

Differentiation function is adapted from Wang (1996).

Wang, L. J. (1996). Processing of Near-Field Earthquake Accelerograms, California Institute of Technology (unpublished), available at http://resolver.caltech.edu/CaltechEERL:1996.EERL‑96‑04

Questions? Contact: ekalkan@usgs.gov