Hello,
I am new to modeling trusses and I'm attempting to model a wood queen post truss and have just started with the self weight of the truss but I get 13 warnings when I run the model which say: *WARNING- ZERO STIFFNESS IN DIRECTION 2 AT JOINT 3 EQN.NO. 6.
Would someone be able to look at my .std file and tell me what is going on?
STAAD TRUSS START JOB INFORMATION ENGINEER DATE 13-Dec-17 END JOB INFORMATION INPUT WIDTH 79 UNIT INCHES POUND JOINT COORDINATES 1 0 0 0; 2 32.4074 0 0; 3 47.3968 0 0; 4 91.5307 0 0; 5 118.597 0 0; 6 141.397 0 0; 7 188.387 0 0; 8 235.377 0 0; 9 258.157 0 0; 10 285.243 0 0; 11 329.377 0 0; 12 344.346 0 0; 13 376.754 0 0; 14 258.157 64.9854 0; 15 258.157 89.3314 0; 16 188.377 141.892 0; 17 118.597 89.3314 0; 18 118.597 64.9854 0; MEMBER INCIDENCES 1 1 2; 2 2 3; 3 3 4; 4 4 5; 5 5 6; 6 6 7; 7 7 8; 8 8 9; 9 9 10; 10 10 11; 11 11 12; 12 12 13; 13 5 18; 14 9 14; 15 2 18; 16 12 14; 17 1 17; 18 13 15; 19 18 14; 20 18 17; 21 14 15; 22 17 16; 23 15 16; DEFINE MATERIAL START ISOTROPIC WHOA_N1_8X8_PO E 1e+006 POISSON 0.15 DENSITY 0.0144676 ALPHA 5.5e-006 ISOTROPIC WHOA_N1_6X6_PO E 1e+006 POISSON 0.15 DENSITY 0.0144676 ALPHA 5.5e-006 ISOTROPIC WHOA_N1_6X6_BM E 1e+006 POISSON 0.15 DENSITY 0.0260417 ALPHA 5.5e-006 ISOTROPIC WHOA_N1_8X8_BM E 1e+006 POISSON 0.15 DENSITY 0.0260417 ALPHA 5.5e-006 END DEFINE MATERIAL MEMBER PROPERTY AITC 17 18 22 23 TABLE ST WHOA_N1_6X6_BM 1 TO 12 15 16 19 TABLE ST WHOA_N1_8X8_BM 13 14 20 21 TABLE ST WHOA_N1_8X8_PO CONSTANTS MATERIAL WHOA_N1_8X8_PO MEMB 13 14 20 21 MATERIAL WHOA_N1_6X6_BM MEMB 17 18 22 23 MATERIAL WHOA_N1_8X8_BM MEMB 1 TO 12 15 16 19 SUPPORTS 1 13 PINNED LOAD 1 LOADTYPE Dead TITLE DL SELFWEIGHT Y -1 PERFORM ANALYSIS FINISH
