Project 2

Aim: Model of a membrane roof with cables. The modeling, form-finding and create the cutting patterns to the structure.

Procedure: Create a new project and enablr form finding and cutting pattern options Internal .Assign the material as cable to the lines Select the nodes and assign hinge support A i th f t th bl b d i d t t i l f th b th i l ti 2D t 4/8 Assign the surfaces to the cable boundaries and create a new material for the membrane as orthoropic elastic 2D type In the Form finding dialog give pre stress force of 1 KN/m Material properties of the surface Go generate cutting pattern from cells option from tools and generate the cutting pattern Generate loadcases as

self weight and imposed load 5/8 Apply lmposed load of 0.25 KN/m^2 on the membrane surface Go to RF-LIMITS module from data dop down list and choose the results combination from design limit check Provide axial force ranges for all the surfaces in both nx and ny directions Generate the mesh with 1m triangle meshing

Results: Deflection Warp Axial force in membrane Weft Axial Force in Membrane Principal Stresses Cable Axial Force Tick the compensation, compensation for boundary line,allowances and line type Provide 1% allowance in warp direction and 3% allowance in weft direction Check the cutting pattern for membrane 6/8 Check the cutting pattern for membrane More projects by Shubham