I'm designing a steel plate girder bridge. I don't have a problem with the main member except the bracing. I found in a textbook shown that each girder is splited to 3 beams (2 beams for top and bottom flange and the other is for web). This method allow me to model full depth bracing. My question is how am I going to input the properties such as Ix, Iy for each beams (or Constraint command in SAP software)??
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3D bracing modeling
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