Guy Wires and Steel Poles

Question

Hello, 
 How do I model guy wires into my steel pole? Whenever I insert nodes to the steel pole.. The rendering of steel pole is not good. 
 Also, did my placement of support is correct? 
 Thank you for who will answer.. STAAD INPUT: 
 STAAD SPACE START JOB INFORMATION JOB NAME Bucking Analysis of Steel Pole END JOB INFORMATION INPUT WIDTH 79 UNIT METER KN JOINT COORDINATES 2 0 0 0; 5 0 22.87 0; MEMBER INCIDENCES 1 2 5; DEFINE MATERIAL START ISOTROPIC STEEL E 2.05e+008 POISSON 0.3 DENSITY 76.8195 ALPHA 1.2e-005 DAMP 0.03 TYPE STEEL STRENGTH FY 253200 FU 407800 RY 1.5 RT 1.2 END DEFINE MATERIAL MEMBER PROPERTY AMERICAN 1 PRIS HDC STA 0.625 END 0.175 THI 0.005 CONSTANTS MATERIAL STEEL ALL SUPPORTS 2 ENFORCED BUT MY 5 ENFORCED BUT MX MY MZ DEFINE WIND LOAD TYPE 1 WIND 1 <! STAAD PRO GENERATED DATA DO NOT MODIFY !!! ASCE-7-2010:PARAMS 270.000 KMPH 5 2 0 0 0.000 FT 0.000 FT 0.000 FT 1 - 1 40.000 FT 25.000 FT 60.000 2.000 0.010 - 0 0 0 0 1.044 1.000 1.000 0.850 0 - 0 0 0 0.879 1.900 -0.550 !> END GENERATED DATA BLOCK INT 4.15589 4.15589 4.26278 4.36047 4.45059 4.53434 4.61266 4.68629 4.75582 - 4.82173 4.88443 4.94425 5.00148 5.05634 5.10906 2.80333 HEIG 0 4.572 - 5.15815 5.74431 6.33046 6.91662 7.50277 8.08892 8.67508 9.26123 - 9.84739 10.4335 11.0197 11.6059 12.192 12.192 EXP 1 JOINT 2 5 LOAD 1 LOADTYPE Dead TITLE DEAD LOAD SELFWEIGHT Y -1 LOAD 2 LOADTYPE Push TITLE SUPER IMPOSEDLOAD JOINT LOAD 5 FX 35.58 FZ -29.71 LOAD 3 LOADTYPE Wind TITLE WINDLOAD WIND LOAD X 1 TYPE 1 OPEN WIND LOAD Z 1 TYPE 1 OPEN LOAD COMB 4 COMBINATION LOAD CASE 4 1 1.4 LOAD COMB 5 COMBINATION LOAD CASE 5 1 1.2 2 1.6 LOAD COMB 6 COMBINATION LOAD CASE 6 1 1.2 3 0.8 LOAD COMB 7 COMBINATION LOAD CASE 7 1 1.2 3 1.6 2 0.5 PERFORM ANALYSIS PRINT ALL FINISH

Sye · Answer

You need to insert nodes to add the guy wires. Your property assignments are getting messed up when you are inserting the nodes as each segment is being assigned the same tapered tube property and that is in turn messing up the rendered view. You need to assign the properties of the tapered tube for each segment considering the depth at start and end of the segment. 
 Regarding support, use FIXED BUT in lieu of ENFORCED BUT unless you want to apply support displacement loading. I don&rsquo;t think you should release the MY at the base support as that would mean the pole would be able to rotate about it&rsquo;s axis. I would rather go with a FIXED or a FIXED BUT MX MZ support at the base depending on whether the base can carry moment or not. Also at the top of the structure you have restrained vertical and lateral translations. If you don&rsquo;t have an actual support at the top retraining these dofs, you should take that support out. I guess the guy wires are going to provide the lateral stability for your pole other than the support at the base. 
 I hope this helps.