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convert BS EN1998-1 data to API 650

Meca_007

Mechanical
Joined
May 13, 2025
Messages
1
Need help converting BS EN1998-1 seismic data to API 650.

Seismicity: (BS EN1998-1)
- Seismic Zone
1
- agR For TNCR = 475 years
0.05g
For TNCR = 2500 years
Refer MCE
Maximum Credible Earthquake (MCE)
0.32g
- MS
>5.4
- Response Spectrum Type
1
 
Refer to E.4.3 Sites Not Defined by ASCE 7 Methods.

In this case Sp ( peak ground acceleration ) will be agR For TNCR =475 years . However , the figures agR For TNCR 475 years = 0.05 G and For TNCR 2500 years =0.32 G are not consistent. If 0.32 G is correct , TNCR 475 years should be 0.32*0.66 G =0.21 G.
 

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