The nonlinear response history analysis (NLRHA) provisions contained within TS 1170.5:2025 were developed for NZS 1170.5:2004 more than 20 years ago. Significant developments have occurred since the standard was originally drafted which means that the NLRHA provisions contained within TS 1170.5 are out of date. To help address this issue, the collaborating technical societies of NZGS, NZSEE and SESOC have developed guidelines which can be used by NZ design professionals when using NLRHA to validate the seismic performance of structures.
The guideline draws upon knowledge that has been gained since NZS 1170.5 was published and sets out a contemporary approach for establishing earthquake design actions in structures when using NLRHA. It provides:
- Recommendations for the selection and scaling of ground motion records,
- Recommendations for modelling structural elements,
- Detailed criteria for evaluating seismic performance, and
- Guidance for determining horizontal design actions for parts of structures and non-structural components.
A copy of the guideline can be accessed using the link below:
Download PDF (5.1MB)If you have any feedback on the new guideline please record it in our technical forum here: https://www.sesoc.org.nz/forum/technical-issues/industry-nlrha-guidelines