In general, you may be able to import CSiBridge model into SAP2000 as follows:

• Export your CSiBridge model as text file using the "Orb > Export > Text" menu command.
• Open the text file in a Notepad and search for the "PROGRAM CONTROL" string to find the Program Control table. The Program Control table contains the following entries for program name and program version (the version may differ depending on the version of CSiBridge in which the model was created):

ProgramName=CSiBridge
Version=15.0.1

• Replace the program name and program version entries with entries for SAP2000 (in the example below version 14.2.4 is used, but the actual SAP2000 version should be used):

ProgramName=SAP2000
Version=14.2.4

• Save the modified text file with a new .$2k extension and import it to SAP2000 via the "File > Import > SAP2000 .s2k Text File" menu command in SAP2000.

Since CSiBridge model file may contain additional data not recognized by SAP20000, not all the information may get imported. Any problems will be indicated in the import analysis log and should be carefully reviewed and corrected, if needed.