Steel Arch Truss modeling
Steel Arch Truss modeling
(OP)
I need to analyze a steel arch model and check its adequacy. I need to create a model for it. It is a two dimensional, half a circle truss. It is very similar to the one shown in the attachment below. Except mine is half of circle. I have both SAP2000 and Risa 3d, as well as a program called STRAP. Neither one of them has an arch truss. SAP2000 has a Pratt truss. I am aware that I can model it in Autocad. However, I wanted to see if i can do it directly inside the software. Thanks.






RE: Steel Arch Truss modeling
I'm sure that RISA and SAP2000 both allow you to input joint coordinates and build a model of anything.
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RE: Steel Arch Truss modeling
At least in RISA, you could potentially generate your joint coordinates by using the structure generator option and some clever manipulation. That would be "directly in the software". Then you could build the truss from the joints you've generated.
I suspect though that unless your geometry is perfectly semi-circular and uniform, you'd do better to develop a basic model geometry in AutoCAD and import the DXF file with your joint coordinates.
RE: Steel Arch Truss modeling
RE: Steel Arch Truss modeling
RE: Steel Arch Truss modeling
Or if the segments were not all the same I would generate the node coordinates and beam connections in a spreadsheet and copy and paste into the analysis program.
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Steel Arch Truss modeling
Mike McCann, PE, SE (WA)
RE: Steel Arch Truss modeling
RE: Steel Arch Truss modeling