7/26/2019 Bentley_response Spectrum Analysis

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1. Hello Friends,

Response spectrum analysis demands for seastate input file. I would like to know why do we considerwave/current/wind loads in Seismic analysis. I believe !I recommends to perform the analysis with

seismic loads alone, alon" with the self wei"ht and added mass. #oreover, If it is re$uired in the

analysis, why do we have to provide separate seastate input file when the model file contains the seastateoption%

&ookin" forward to your response.

'hanks and (est Re"ards,Ishwarya

).   Re: Ishwarya, can I know if you are usin" Spectral *arth$uake analysis. If it is a offshore structure, you

may want to use seastate data to "enerate dynpac mode shapes and mass files which will in turn be used

in spectral earth$uake analysis. nswerin" to your second $uestion, if the model input file already hasseastate data, in e+ecutive window, under analysis options please click *dit *nvironmental &oadin"

ptions, and choose yes to Seastate Input in #odel File option. !lease let me know if you have any

further $uestions on this. 'hanks.

-. 'hank you for your response. es, I am usin" Spectral *arth$uake analysis. I have already "iven the

seastate loads in the modelin" file. Is it possible to run the analysis without separate seainp file% *ven ifI am choosin" es for environmental loadin" under analysis options, it is promptin" as 0seastate inputre$uired0 in the input file section. So, do we have to use the model file a"ain as the seastate input file%

Re"ards,

Ishwarya

.   Re: 2an you please check if you have used &3!' line in your model input line% 'hanks4. eah I have used the &3!' line.

5.   Re: 6ould you please click Reset nalysis Subtype button after choosin" yes to Seastate Input in #odel

File option in *dit *nvironmental &oadin" ptions% It 7ust worked for me. !lease let me know if it

works. 'hanks8. 'hank you for the su""estions, but I am still not able to proceed without "ivin" a separate seainp file. It

would be very helpful if you could share some details on the complete spectral analysis steps usin"

seainp with some e+ample output. I could "et only a part of the information from S2S manual.

Re"ards

9.   Re: If you could create a service ticket throu"h S2S, I can take a look at your files and see why you

are not able to proceed without a separate seainp file. If you are lookin" for sample files for Spectral

*arth$uake please refer to sample 4. 2:;pro"ram files <+95=;bentley;en"ineerin";sacs 1> connect

edition;samples;sample >4;. If you have any $uestions on this, please feel free to ask.

?. kay, thank you

Re"ards,

Ishwarya

10.Re: ou are welcome.