To allow the comparison of the hazard spectrum predicted by a hazard model with the Eurocode 8 design spectra, we provide a service that computes the EC8 elastic response spectrum Se(T) (EN 1998-1:2004) at a site for a given design ground acceleration, spectrum type and ground type.
Calculations follow Doğangün, A. and Livaoğlu, R. (2006): A comparative study of the design spectra defined by Eurocode 8, UBC, IBC and Turkish Earthquake Code on R/C sample buildings. Journal of Seismology 10, pp. 335–351.
The service is available through the EFEHR REST API under the base URL https://efehr-services.ethz.ch/api/v1. It uses HTTP GET and returns JSON by default; add format=nrml to receive NRML instead. The complete, interactive reference is available at efehr-services.ethz.ch/api/docs.
| User query | Provide the EC8 elastic design spectrum for a given design ground acceleration, event type (Type 2 for earthquakes with magnitude smaller than 5.5, Type 1 for larger ones) and ground type. |
|---|---|
| Request format | /v1/design-spectra/elastic-ec?lat=[latitude]&lon=[longitude]&design-acceleration=[ag]&spectratype=[smallmag | largemag]&soiltype=[A | B | C | D | E]&damping=[%] |
| Parameters |
|
| Request example | https://efehr-services.ethz.ch/api/v1/design-spectra/elastic-ec?lat=47.5&lon=7.6&design-acceleration=0.15&spectratype=largemag&soiltype=B |
| Response example |
{
"spectrum": {
"lon": 7.6,
"lat": 47.5,
"imt": "SA",
"design_acceleration": 0.15,
"spectra_type": "largemag",
"soil_type": "B",
"damping": 5.0,
"standard": "EN 1998-1:2004",
"points": [
{
"period": 0.0,
"acceleration": 0.18
},
{
"period": 0.05,
"acceleration": 0.27
},
{
"period": 0.1,
"acceleration": 0.36
},
{
"period": 0.15,
"acceleration": 0.45
},
{
"period": 0.2,
"acceleration": 0.45
},
{
"period": 0.25,
"acceleration": 0.45
},
{
"period": 0.3,
"acceleration": 0.45
},
{
"period": 0.4,
"acceleration": 0.45
},
{
"period": 0.5,
"acceleration": 0.45
},
{
"period": 0.6,
"acceleration": 0.375
},
{
"period": 0.7,
"acceleration": 0.321429
},
{
"period": 0.8,
"acceleration": 0.28125
},
{
"period": 0.9,
"acceleration": 0.25
},
{
"period": 1.0,
"acceleration": 0.225
},
{
"period": 1.25,
"acceleration": 0.18
},
{
"period": 1.5,
"acceleration": 0.15
},
{
"period": 2.0,
"acceleration": 0.1125
},
{
"period": 2.5,
"acceleration": 0.072
},
{
"period": 3.0,
"acceleration": 0.05
},
{
"period": 4.0,
"acceleration": 0.028125
}
]
},
"metadata": {
"source": "EFEHR Services FastAPI",
"note": "Values computed from EN 1998-1:2004 (EC8). Verify against standard before use."
}
}
|
The hazard.EFEHR web platform and web services are developed, maintained and hosted by the Swiss Seismological Service (SED) at ETH Zurich under the umbrella of EFEHR, in collaboration with the GEM Foundation and EPOS (European Plate Observing System).
The work presented in this website has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreements No.s 730900, 676564 and 821115 of the projects SERA, EPOS-IP and RISE. The European Commission is not responsible for any use that may be made of the information contained in this website.
