{"id":2521,"date":"2018-09-14T13:39:01","date_gmt":"2018-09-14T13:39:01","guid":{"rendered":"http:\/\/buildsoftsupport.com\/?post_type=ht_kb&p=2521"},"modified":"2024-08-21T07:09:40","modified_gmt":"2024-08-21T07:09:40","slug":"how-to-introduce-a-user-defined-seismic-spectrum","status":"publish","type":"ht_kb","link":"https:\/\/support.buildsoft.eu\/es\/knowledge-base\/how-to-introduce-a-user-defined-seismic-spectrum\/","title":{"rendered":"How to introduce a user defined response spectrum\/ seismic spectrum"},"content":{"rendered":"

A user defined reponse spectrum is always a relative spectrum with values between 0 and 1. It is scaled to the correct size with the reference acceleration and reference peroid (see example).<\/p>\n

Example<\/h2>\n \t\t
\r\n \t\t\t \t\t\t \t\t\t\t

\r\n \t\t\t\t\tWhen using this feature, make sure to use design values Sd,<\/sub><\/strong> not elastic values Se<\/sub>. Diamonds has no possibility to take a behaviour factor q<\/em>  (EN 1998-1-1 \u00a75.2.2.2) and \/or an importance factor \u03b3I<\/sub> into account for user defined response spectra. \t\t\t\t<\/p>\r\n \t\t\t \t\t\t\r\n \t\t<\/div>\r\n \t\t\n

    \n
  1. Assume we have this design spectrum in Excel. Column A contains the period T in [s] and column B contains the design accelaration Sd<\/sub> in [g].\"\"<\/a><\/li>\n
  2. Find the maximum value for the period Tmax<\/sub> in column A and the acceleration Sd,max<\/sub> in column B.\"\"<\/li>\n
  3. Select the cells containing the spectrum values, don’t select the labels<\/strong>! Press CTRL<\/kbd> + C<\/kbd>. \"\"<\/li>\n
  4. Go to the the spectrum dialog \"\" in Diamonds.
    \nSelect the relevant direction U, V or W (the vertical direction W is only selectable when you check the option Include vertical component<\/em>). Click on\"\". Diamonds will transfer the spectrum to a relative spectrum and paste the values into the table. A relative spectrum means that<\/p>\n
      \n
    • Column A will be divided by Tmax<\/sub><\/li>\n
    • Column B will be divided by Sd,max<\/sub><\/li>\n<\/ul>\n

      \"\"<\/li>\n

    • Set the reference period in Diamonds equal to Tmax<\/sub> from the Excel.
      \nSet the reference acceleration equal to Sd,max<\/sub> from the Excel. Mind the units! 1g = 9.81m\/s\u00b2 so<\/strong> 0.7454g equals 7.31 m\/s\u00b2!
      \n<\/strong>Define the displacement factor (qd<\/sub> in EN 1998-1-1 \u00a74.3.4).
      \n\"\"
      \n<\/strong><\/li>\n
    • We’ve now defined the spectrum in one horizontal direction.
      \nRepeat the steps for the other horizontal (V) direction and the vertical (W) direction if necessary.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

      A user defined reponse spectrum is always a relative spectrum with values between 0 and 1. It is scaled to the correct size with the reference acceleration and reference peroid (see example). Example Assume we have this design spectrum in Excel. Column A contains the period T in [s] and column B…<\/p>\n","protected":false},"author":3,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":[],"ht-kb-category":[1271],"ht-kb-tag":[],"_links":{"self":[{"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/ht-kb\/2521"}],"collection":[{"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/comments?post=2521"}],"version-history":[{"count":2,"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/ht-kb\/2521\/revisions"}],"predecessor-version":[{"id":13062,"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/ht-kb\/2521\/revisions\/13062"}],"wp:attachment":[{"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/media?parent=2521"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/ht-kb-category?post=2521"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/es\/wp-json\/wp\/v2\/ht-kb-tag?post=2521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}