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OLUBUKOLAADEBOY10-Marble
10-Marble
November 3, 2016
Solved

Interpolation (Seismic values for Fa and Fv

Good Evening Mathcad Community,

Would anybody please help me with the attached file. My goal is to do interpolation given a period T.a =0.5*sec, based on site_class and the header Sa(0.2*s)  for Fa(site_class, Sa(Ta)) and

same for Fv(site_clas,Sa(Ta)), I'm having problem as to how to program this in Mathcad. I will appreciate this if anyone can help.

Regards,

Boyetr

Werner_E
Werner_EAnswer
25-Diamond I
November 3, 2016

If linear interpolation is sufficient, I guess that the attached should do the job. Just a quick hack - no error checking for invalid site_class is implemented and ORIGIN=0 is assumed.

Regards

Werner

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11 replies

Werner_E
Werner_E25-Diamond IAnswer
25-Diamond I
November 3, 2016

If linear interpolation is sufficient, I guess that the attached should do the job. Just a quick hack - no error checking for invalid site_class is implemented and ORIGIN=0 is assumed.

Regards

Werner

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OLUBUKOLAADEBOY10-MarbleAuthor
10-Marble
November 3, 2016

Werner, Thank you so very much.

Regards,

Boyer

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OLUBUKOLAADEBOY10-MarbleAuthor
10-Marble
November 4, 2016

Good Afternoon Werner,

Please see attached pdf file. On the subject on earthquake, the values generated  for Fa and Fv seems to be off and I do not know why. Would you be kind to review the Mathcad function linterp.

Regards

Boyer

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MJG1-Visitor
1-Visitor
November 4, 2016

The equations Werner provided to you calculate:

  • Fa as a function of site class and Sa(0.2)
  • Fv as a function of site class and Sa(1.0)

They are not functions of Ta as seems to be indicated.

Therefore, his equations appear to match the values shown in your attachment:

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OLUBUKOLAADEBOY10-MarbleAuthor
10-Marble
November 5, 2016

Good Evening Mark,

Thanks for your comment. What should I do to resolve the issue in the function statement.

Regards,

Boyer

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