Code spectra and site specific spectra
Code Spectra
Different analysis procedures are provided for determining the elastic design response spectrum, the first of which is simply to adopt the code spectra appropriate to the Seismic Loading action code selected for the model.
Site Specific Spectra (user defined)
In addition to the code spectra, Tekla Structural Designer also allows you to define your own site specific spectra by specifying significant periods and acceleration. This procedure is applicable to both ELF and RSA analysis.
The curve equations used for the different Seismic Loading action codes are as follows:
- ASCE 7 Horizontal Design Spectrum
- EN 1998-1 Horizontal Design Spectrum (Europe, UK, Singapore NA)
- EN 1998-1 Horizontal Design Spectrum (Malaysia NA)
- IS893 (Part 1) Horizontal Design Spectrum
- ASCE 7/UBC Horizontal Design Spectrum - Taiwan
This procedure can be used for locations which use another country's loading and design codes where the code spectra are not relevant and so the local site spectra need to be defined.
Site Specific Spectra (user defined - generic curve)
- ASCE 7-05
- ASCE 7-10
- ASCE 7-16