Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Load Cases Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers Item #1: Can I copy in Response Spectrum values into the Response/Force Spectrum Loads dialog? Answer: Yes it can be done. With the model opened in AutoPIPE and the "Response/Force Spectrum Loads" displayed enter in the following data: Spectrum filename = enter a file name (saved as a *.SPC file in the same folder as the model) Seismic Code = User Interpolation method = Choose from the drop down listing Damping ratio = Enter the damping ratio for the spectrum data. Data Type (Freq/Per) = Choose from the drop down listing Acc/G/Vel/Disp/Force = Choose from the drop down listing Next is the Spectrum data; entered in as pairs. These pairs contain data corresponding to Frequency/Period and A/G/F/V values. Open an MS Excel spread sheet that contains 2 columns with the data in the correct units. Select the 2 columns and all the rows containing the data pairs, right click the mouse button, choose Copy command from the listing Back inside of AutoPIPE place the mouse pointer in the first " Data Type " cell, Right click the mouse button again and select PASTE , shown below: Presto, all the data should now have been pasted into the dialog, shown below: Note: Perform random spot checks to be sure all the data was correctly copied into the dialog. Item #2, How to create a Response Spectrum analysis? Answer: A response spectrum analysis is used to determine the response of a structural system subjected to earthquake excitation. A response spectrum analysis uses results from the modal analysis to obtain a solution. Thus, a modal analysis must be performed before a response spectrum analysis is initiated. All assumptions made during the modal analysis apply. Note: Only the AutoPIPE Advanced and Nuclear versions will allow specification of fifty response spectrum cases. The standard version of AutoPIPE will allow a maximum of five response spectrum cases. Run a Response Spectrum analysis based on the parameters defined in the following locations: Spectrum data (*.SPC) from the Response / Force Spectrum Load dialog Modal TAB of the Dynamic Analysis dialog Response Spectrum TAB of the Dynamic Analysis dialog Sam analysis dialog (optional) SAM / MRSRS Suport Group dialog (optional) A detailed description of performing a MSRS analysis can be found in the following document: C:\ Bentley\ AutoPIPE V8i SELECTseries\ Documents \ AutoPIPE_MSRS_Example1.pdf (or try searching your hard drive for the file AutoPIPE_MSRS_Example1.pdf) Note: this documented procedure can be adapted to perform a single response spectrum. Item #3: How to create an ASCII Spectrum File? Answer: Please see the following AutoPIPE help section: Help Contents Contents Tab Command Reference Load Commands Response/Force Spectrum Loads see hyperlink near the bottom of the page "Creating an ASCII Spectrum File". Note: 1. that the actual data in this file is entered using English units and is correctly converted to the correct units when the dialog is opened. 2. Best method to correctly format an ASCII file is to first open a model in AutoPIPE and using the Load "Response/Force Spectrum Loads" command enter the data into the dialog as needed and press OK button to automatically create the *.SPC file in the same folder as the model. Locate the *.SPC file, and opened with any word processing application (i.e. NotePad ++, Ultra Edit, MS Word), notice the correct formatting and values. Adjust the file as needed but maintain the exact formatting structure. Save the file, and use in AutoPIPE as needed. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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