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STAAD Instability weak spring

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cgstrucg

Structural
Mar 21, 2018
135
0
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US
Hello,

I am getting a weak spring message in this code. I am not able to understand why this is happening. My assumption is that it's because of pinned end supports there is some moment in the frame which is not able to get resolved. If my assumption is right then can someone please help me resolve this. (I can't make any support fixed).

Thanks a lot.

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 19-Apr-19
END JOB INFORMATION
INPUT WIDTH 79
UNIT FEET KIP
JOINT COORDINATES
1 0 0 -0.000399272; 2 0 0 12.6667; 3 0 1 0; 4 0 1 12.6667; 8 0 2 -0.000399272;
9 0 2 7.1667; 10 0 2 12.6667; 15 1.5 2 -0.000399272; 16 1.5 2 12.6667;
24 13.775 2 3.3335; 30 26.05 2 -0.000399272; 31 26.05 2 12.6667;
32 27.55 0 -0.000399272; 33 27.55 0 12.6667; 34 27.55 1 0; 35 27.55 1 12.6667;
39 27.55 2 -0.000399272; 49 27.55 2 11.1667; 50 0 2 11.1667; 51 27.55 2 1.4996;
52 0 2 1.4996; 62 0 2 6.6667; 64 1.5 2 6.6667; 66 26.05 2 6.6667;
67 34.0497 0 7.167; 69 34.0497 0 10.667; 70 34.0497 3.5 10.667;
75 6.8 2 12.6667; 77 27.55 2 6.6667; 79 27.55 2 12.6667; 81 27.55 7 10.6667;
82 6.8 7 12.6667; 90 27.55 7 12.6667; 92 18.8003 2 12.6667;
96 18.8002 7 12.6667; 100 27.55 2 7.1667; 101 34.0497 3.5 7.167;
102 18.8 2 7.1667; 103 6.8 2 7.1667; 104 6.8 7 7.1667; 105 27.55 7 7.1667;
106 18.8 7 7.1667; 110 40.5493 0 7.167; 111 40.5493 0 10.667;
119 12.8003 7 12.6667; 120 18.8 7 6.6667; 121 6.8 7 6.6667; 122 27.55 7 6.6667;
123 12.8 7 6.6667; 124 6.8 6.5 7.1667; 125 27.55 6.5 7.1667;
126 18.8 6.5 7.1667; 127 23.1753 7 12.6667; 128 23.175 7 6.6667;
MEMBER INCIDENCES
1 3 1; 2 4 2; 3 8 3; 4 10 4; 5 9 62; 10 9 50; 17 15 3; 18 16 4; 19 8 15;
20 10 16; 35 15 30; 36 100 102; 37 31 92; 47 30 34; 48 31 35; 49 30 39;
50 31 79; 51 34 32; 52 35 33; 53 39 34; 54 79 35; 55 100 77; 61 49 100;
91 49 79; 92 35 49; 93 50 10; 94 4 50; 95 51 39; 96 34 51; 97 52 8; 98 3 52;
104 77 66; 105 77 51; 107 62 52; 108 15 64; 109 64 62; 111 30 66; 112 66 64;
113 67 101; 114 69 70; 118 103 124; 119 75 82; 120 100 125; 121 79 90;
122 105 101; 123 81 70; 125 121 123; 132 81 105; 134 102 126; 135 92 96;
139 90 81; 148 75 16; 150 92 75; 152 102 103; 153 103 9; 154 104 82;
156 106 96; 158 120 128; 161 123 120; 163 101 110; 164 70 111; 165 119 123;
166 82 119; 167 96 127; 168 119 96; 169 105 122; 170 106 120; 172 104 121;
173 124 104; 174 125 105; 175 126 106; 176 124 121; 177 126 120; 179 125 122;
180 127 90; 181 128 122; 182 127 128;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 4.176e+006
POISSON 0.3
DENSITY 0.489024
ALPHA 6e-006
DAMP 0.03
TYPE STEEL
STRENGTH FY 5184 FU 8352 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
132 139 154 156 165 169 170 172 182 TABLE ST C4X5
1 TO 4 51 TO 54 TABLE ST HSST6X6X0.5
MEMBER PROPERTY AMERICAN
17 18 47 48 92 94 96 98 176 177 179 TABLE ST L30308
5 10 19 20 35 TO 37 49 50 55 61 91 93 95 97 104 105 107 TO 109 111 112 148 -
150 152 153 TABLE ST W12X45
125 158 161 166 TO 168 180 181 TABLE ST MC4X13
113 114 118 TO 121 134 135 173 TO 175 TABLE ST HSST3X3X0.375
122 123 163 164 TABLE ST MC10X22
CONSTANTS
BETA 45 MEMB 17 18 47 48 92 94 96 98 176 177 179
MATERIAL STEEL ALL
SUPPORTS
110 111 FIXED BUT FX MX MY MZ
1 2 32 33 67 69 PINNED
120 TO 122 FIXED BUT FX FY MX MY MZ
MEMBER RELEASE
19 20 36 104 108 111 139 165 182 START MY MZ
49 50 108 109 111 153 154 156 165 169 170 172 182 END MY MZ
122 123 START FX MY MZ
MEMBER TRUSS
17 18 47 48 92 94 96 98 176 177 179
SLAVE ZX MASTER 24 JOINT 15 30 64 66
LOAD 1 LOADTYPE Dead TITLE DL
SELFWEIGHT Y -1 LIST ALL
MEMBER LOAD
19 35 49 104 109 112 UNI GY -0.17
156 165 170 182 UNI GY -0.048
132 139 154 169 172 UNI GY -0.024
122 123 163 164 UNI GY -0.014
LOAD 2 LOADTYPE Roof Live TITLE LR
MEMBER LOAD
156 165 170 182 UNI GY -0.36
132 139 154 169 172 UNI GY -0.18
122 123 163 164 UNI GY -0.18
LOAD 3 LOADTYPE Roof Live TITLE LRCONC
MEMBER LOAD
156 165 170 182 UNI GY -0.36
132 139 154 169 172 UNI GY -0.18
122 CON GY -1 0.5
LOAD 4 LOADTYPE Snow TITLE SL
MEMBER LOAD
19 35 49 104 109 112 UNI GY -0.08
156 165 170 182 UNI GY -0.13
132 139 154 169 172 UNI GY -0.065
122 123 163 164 UNI GY 0.04
LOAD 5 LOADTYPE Snow TITLE SL DRIFT
MEMBER LOAD
170 TRAP GY -0.1665 -0.18
156 TRAP GY -0.1665 -0.02
165 182 TRAP GY -0.02 -0.18
169 172 TRAP GY -0.08425 -0.09
154 TRAP GY -0.08425 -0.01
132 TRAP GY -0.054 -0.08425
139 TRAP GY -0.01 -0.054
LOAD 6 LOADTYPE Ice TITLE IL
MEMBER LOAD
156 165 170 182 UNI GY -0.14
132 139 154 169 172 UNI GY -0.07
122 123 163 164 UNI GY -0.035
19 35 49 104 109 112 UNI GY -0.05
19 35 49 104 109 112 UNI GY -0.042
1 TO 4 51 TO 54 UNI GY -0.022
17 18 47 48 92 94 96 98 176 177 179 UNI GY -0.012
125 132 139 154 156 158 161 165 TO 170 172 180 TO 182 UNI GY -0.013
5 10 19 20 35 TO 37 49 50 55 61 91 93 95 97 104 105 107 TO 109 111 112 148 -
150 152 153 UNI GY -0.04
122 123 163 164 UNI GY -0.025
113 114 118 TO 121 134 135 173 TO 175 UNI GY -0.015
LOAD 7 LOADTYPE Wind TITLE WIND +X
MEMBER LOAD
19 35 49 104 109 112 UMOM GZ -0.55
19 35 49 104 109 112 UNI GX 0.12
122 123 163 164 UNI GX 0.009
1 TO 4 UNI GX 0.04
113 114 118 119 173 UNI GX 0.02
154 172 UNI GX 0.03
94 98 176 UNI GX 0.02
5 10 93 97 107 UNI GX 0.08
LOAD 8 LOADTYPE Wind TITLE WIND -X
MEMBER LOAD
19 35 49 104 109 112 UMOM GZ 0.55
19 35 49 104 109 112 UNI GX -0.12
122 123 163 164 UNI GX -0.009
51 TO 54 UNI GX -0.04
113 114 120 121 174 UNI GX -0.02
132 139 169 UNI GX -0.03
92 96 179 UNI GX -0.02
55 61 91 95 105 UNI GX -0.08
LOAD 9 LOADTYPE Wind TITLE WIND +Z
MEMBER LOAD
19 35 49 104 109 112 UNI GZ 0.42
19 35 49 UNI GY 0.33
104 109 112 UNI GY -0.33
122 163 UNI GZ 0.07
1 3 51 53 UNI GZ 0.022
113 UNI GZ 0.011
17 47 UNI GZ 0.023
19 35 49 UNI GZ 0.09
LOAD 10 LOADTYPE Wind TITLE WIND -Z
MEMBER LOAD
19 35 49 104 109 112 UNI GZ -0.42
104 109 112 UNI GY 0.33
19 35 49 UNI GY -0.33
123 164 UNI GZ -0.07
2 4 52 54 UNI GZ -0.022
114 119 121 135 UNI GZ -0.011
18 48 UNI GZ -0.023
20 37 50 148 150 UNI GZ -0.09
166 TO 168 180 UNI GZ -0.03
LOAD 11 LOADTYPE Wind on Ice TITLE WIL+X
MEMBER LOAD
122 123 163 164 UNI GX 0.006
1 TO 4 UNI GX 0.009
154 172 UNI GX 0.01
94 98 176 UNI GX 0.005
5 10 93 97 107 UNI GX 0.017
113 114 118 119 173 UNI GX 0.005
LOAD 12 LOADTYPE Wind on Ice TITLE WIL-X
MEMBER LOAD
122 123 163 164 UNI GX -0.006
51 TO 54 UNI GX -0.009
113 114 120 121 174 UNI GX -0.005
132 139 169 UNI GX -0.01
92 96 179 UNI GX -0.005
55 61 91 95 105 UNI GX -0.017
LOAD 13 LOADTYPE Wind on Ice TITLE WIL+Z
MEMBER LOAD
122 163 UNI GZ 0.02
1 3 51 53 UNI GZ 0.009
113 UNI GZ 0.005
17 47 UNI GZ 0.005
19 35 49 UNI GZ 0.018
LOAD 14 LOADTYPE Wind on Ice TITLE WIL-Z
MEMBER LOAD
123 164 UNI GZ -0.02
2 4 52 54 UNI GZ -0.009
114 119 121 135 UNI GZ -0.005
18 48 UNI GZ -0.011
20 37 50 148 150 UNI GZ -0.005
166 TO 168 180 UNI GZ -0.018
LOAD 15 LOADTYPE Seismic TITLE EL+X
NOTIONAL LOAD
1 X 0.02
LOAD 16 LOADTYPE Seismic TITLE EL-X
NOTIONAL LOAD
1 X -0.02
LOAD 17 LOADTYPE Seismic TITLE EL+Z
NOTIONAL LOAD
1 Z 0.002
LOAD 18 LOADTYPE Seismic TITLE EL-Z
NOTIONAL LOAD
1 Z -0.02
LOAD 19 LOADTYPE Temperature TITLE TEMP+
LOAD 20 LOADTYPE Temperature TITLE TEMP-
LOAD COMB 101 D
1 1.0
LOAD COMB 102 D+LR
1 1.0 2 1.0
LOAD COMB 103 D+LR2
1 1.0 3 1.0
LOAD COMB 104 D+S
1 1.0 4 1.0 5 1.0
LOAD COMB 105 D+0.75LR
1 1.0 2 0.75
LOAD COMB 106 D+0.75LR2
1 1.0 3 0.75
LOAD COMB 107 D+0.75S
1 1.0 4 0.75 5 0.75
LOAD COMB 108 D+WX+
1 1.0 7 1.0
LOAD COMB 109 D+WX-
1 1.0 8 1.0
LOAD COMB 110 D+WZ+
1 1.0 9 1.0
LOAD COMB 111 D+WZ-
1 1.0 10 1.0
LOAD COMB 112 D+0.7EX+
1 1.0 15 0.7
LOAD COMB 113 D+0.7EX-
1 1.0 16 0.7
LOAD COMB 114 D+0.7EZ+
1 1.0 17 0.7
LOAD COMB 115 D+0.7EZ-
1 1.0 18 0.7
LOAD COMB 116 D+0.75WX++0.75LR
1 1.0 7 0.75 2 0.75
LOAD COMB 117 D+0.75WX-+0.75LR
1 1.0 8 0.75 2 0.75
LOAD COMB 118 D+0.75WZ++0.75LR
1 1.0 9 0.75 2 0.75
LOAD COMB 119 D+0.75WZ-+0.75LR
1 1.0 10 0.75 2 0.75
LOAD COMB 120 D+0.75WX++0.75LR2
1 1.0 7 0.75 3 0.75
LOAD COMB 121 D+0.75WX-+0.75LR2
1 1.0 8 0.75 3 0.75
LOAD COMB 122 D+0.75WZ++0.75LR2
1 1.0 9 0.75 3 0.75
LOAD COMB 123 D+0.75WZ-+0.75LR2
1 1.0 10 0.75 3 0.75
LOAD COMB 124 D+0.75EX++0.75LR
1 1.0 15 0.75 2 0.75
LOAD COMB 125 D+0.75EX-+0.75LR
1 1.0 16 0.75 2 0.75
LOAD COMB 126 D+0.75EZ++0.75LR
1 1.0 17 0.75 2 0.75
LOAD COMB 127 D+0.75EZ-+0.75LR
1 1.0 18 0.75 2 0.75
LOAD COMB 128 D+0.75EX++0.75LR2
1 1.0 15 0.75 3 0.75
LOAD COMB 129 D+0.75EX-+0.75LR2
1 1.0 16 0.75 3 0.75
LOAD COMB 130 D+0.75EZ++0.75LR2
1 1.0 17 0.75 3 0.75
LOAD COMB 131 D+0.75EZ-+0.75LR2
1 1.0 18 0.75 3 0.75
LOAD COMB 132 D+0.75WX++0.75S
1 1.0 7 0.75 4 0.75 5 0.75
LOAD COMB 133 D+0.75WX-+0.75S
1 1.0 8 0.75 4 0.75 5 0.75
LOAD COMB 134 D+0.75WZ++0.75S
1 1.0 9 0.75 4 0.75 5 0.75
LOAD COMB 135 D+0.75WZ-+0.75S
1 1.0 10 0.75 4 0.75 5 0.75
LOAD COMB 136 D+0.525EX++0.75S
1 1.0 15 0.525 4 0.75 5 0.75
LOAD COMB 137 D+0.525EX-+0.75S
1 1.0 16 0.525 4 0.75 5 0.75
LOAD COMB 138 D+0.525EZ++0.75S
1 1.0 17 0.525 4 0.75 5 0.75
LOAD COMB 139 D+0.525EZ-+0.75S
1 1.0 18 0.525 4 0.75 5 0.75
LOAD COMB 140 0.6D+WX+
1 0.6 7 1.0
LOAD COMB 141 0.6D+WX-
1 0.6 8 1.0
LOAD COMB 142 0.6D+WZ+
1 0.6 9 1.0
LOAD COMB 143 0.6D+WZ-
1 0.6 10 1.0
LOAD COMB 144 0.6D+0.7EX+
1 0.6 15 0.7
LOAD COMB 145 0.6D+0.7EX-
1 0.6 16 0.7
LOAD COMB 146 0.6D+0.7EZ+
1 0.6 17 0.7
LOAD COMB 147 0.6D+0.7EZ-
1 0.6 18 0.7
LOAD COMB 201 D+0.7IL
1 1.0 6 0.7
LOAD COMB 202 D+0.7IL+0.7WILX++S
1 1.0 6 0.7 11 0.7 4 1.0 5 1.0
LOAD COMB 203 D+0.7IL+0.7WILX-+S
1 1.0 6 0.7 12 0.7 4 1.0 5 1.0
LOAD COMB 204 D+0.7IL+0.7WILZ++S
1 1.0 6 0.7 13 0.7 4 1.0 5 1.0
LOAD COMB 205 D+0.7IL+0.7WILZ-+S
1 1.0 6 0.7 14 0.7 4 1.0 5 1.0
LOAD COMB 206 D+0.7IL+0.7WILX+
1 1.0 6 0.7 11 0.7
LOAD COMB 207 D+0.7IL+0.7WILX-
1 1.0 6 0.7 12 0.7
LOAD COMB 208 D+0.7IL+0.7WILZ+
1 1.0 6 0.7 13 0.7
LOAD COMB 209 D+0.7IL+0.7WILZ-
1 1.0 6 0.7 14 0.7
LOAD COMB 301 1.4D
1 1.4
LOAD COMB 302 1.2D+0.5LR
1 1.2 2 0.5
LOAD COMB 303 1.2D+0.5LR2
1 1.2 3 0.5
LOAD COMB 304 1.2D+0.5S
1 1.2 4 0.5 5 0.5
LOAD COMB 305 1.2D+1.6LR+0.8WX+
1 1.2 2 1.6 7 0.8
LOAD COMB 306 1.2D+1.6LR+0.8WX-
1 1.2 2 1.6 8 0.8
LOAD COMB 307 1.2D+1.6LR+0.8WZ+
1 1.2 2 1.6 9 0.8
LOAD COMB 308 1.2D+1.6LR+0.8WZ-
1 1.2 2 1.6 10 0.8
LOAD COMB 309 1.2D+1.6LR2+0.8WX+
1 1.2 3 1.6 7 0.8
LOAD COMB 310 1.2D+1.6LR2+0.8WX-
1 1.2 3 1.6 8 0.8
LOAD COMB 311 1.2D+1.6LR2+0.8WZ+
1 1.2 3 1.6 9 0.8
LOAD COMB 312 1.2D+1.6LR2+0.8WZ-
1 1.2 3 1.6 10 0.8
LOAD COMB 313 1.2D+1.6S+0.8WX+
1 1.2 4 1.6 5 1.6 7 0.8
LOAD COMB 314 1.2D+1.6S+0.8WX-
1 1.2 4 1.6 5 1.6 8 0.8
LOAD COMB 315 1.2D+1.6S+0.8WZ+
1 1.2 4 1.6 5 1.6 9 0.8
LOAD COMB 316 1.2D+1.6S+0.8WZ-
1 1.2 4 1.6 5 1.6 10 0.8
LOAD COMB 317 1.2D+0.5LR+1.6WX+
1 1.2 2 0.5 7 1.6
LOAD COMB 318 1.2D+0.5LR+1.6WX-
1 1.2 2 0.5 8 1.6
LOAD COMB 319 1.2D+0.5LR+1.6WZ+
1 1.2 2 0.5 9 1.6
LOAD COMB 320 1.2D+0.5LR+1.6WZ-
1 1.2 2 0.5 10 1.6
LOAD COMB 321 1.2D+0.5LR2+1.6WX+
1 1.2 3 0.5 7 1.6
LOAD COMB 322 1.2D+0.5LR2+1.6WX-
1 1.2 3 0.5 8 1.6
LOAD COMB 323 1.2D+0.5LR2+1.6WZ+
1 1.2 3 0.5 9 1.6
LOAD COMB 324 1.2D+0.5LR2+1.6WZ-
1 1.2 3 0.5 10 1.6
LOAD COMB 325 1.2D+0.5S+1.6WX+
1 1.2 4 0.5 5 0.5 7 1.6
LOAD COMB 326 1.2D+0.5S+1.6WX-
1 1.2 4 0.5 5 0.5 8 1.6
LOAD COMB 327 1.2D+0.5S+1.6WZ+
1 1.2 4 0.5 5 0.5 9 1.6
LOAD COMB 328 1.2D+0.5S+1.6WZ-
1 1.2 4 0.5 5 0.5 10 1.6
LOAD COMB 329 1.2D+EX++0.2S
1 1.2 15 1.0 4 0.2 5 0.2
LOAD COMB 330 1.2D+EX-+0.2S
1 1.2 16 1.0 4 0.2 5 0.2
LOAD COMB 331 1.2D+EZ++0.2S
1 1.2 17 1.0 4 0.2 5 0.2
LOAD COMB 332 1.2D+EZ-+0.2S
1 1.0 18 1.0 4 1.0 5 1.0
LOAD COMB 333 0.9D+1.6WX+
1 0.9 7 1.6
LOAD COMB 334 0.9D+1.6WX-
1 0.9 8 1.6
LOAD COMB 335 0.9D+1.6WZ+
1 0.9 9 1.6
LOAD COMB 336 0.9D+1.6WZ-
1 0.9 10 1.6
LOAD COMB 337 0.9D+EX+
1 0.9 15 1.6
LOAD COMB 338 0.9D+EX-
1 0.9 16 1.6
LOAD COMB 339 0.9D+EZ+
1 0.9 17 1.6
LOAD COMB 340 0.9D+EZ-
1 0.9 18 1.6
LOAD COMB 401 1.2D+0.2I+0.5S
1 1.2 6 0.2 4 0.5 5 0.5
LOAD COMB 402 1.2D+I+WIX++0.5S
1 1.2 6 1.0 11 1.0 4 0.5 5 0.5
LOAD COMB 403 1.2D+I+WIX-+0.5S
1 1.2 6 1.0 12 1.0 4 0.5 5 0.5
LOAD COMB 404 1.2D+I+WIZ++0.5S
1 1.2 6 1.0 13 1.0 4 0.5 5 0.5
LOAD COMB 405 1.2D+I+WIZ-+0.5S
1 1.2 6 1.0 14 1.0 4 0.5 5 0.5
LOAD COMB 406 0.9D+I+WIX+
1 0.9 6 1.0 11 1.0
LOAD COMB 407 0.9D+I+WIX-
1 0.9 6 1.0 12 1.0
LOAD COMB 408 0.9D+I+WIZ+
1 0.9 6 1.0 13 1.0
LOAD COMB 409 0.9D+I+WIZ-
1 0.9 6 1.0 14 1.0
PERFORM ANALYSIS
DEFINE ENVELOPE
101 TO 147 201 TO 209 ENVELOPE 1 TYPE SERVICEABILITY
301 TO 340 401 TO 409 ENVELOPE 2 TYPE STRENGTH
END DEFINE ENVELOPE
LOAD LIST ENV 1 2
PARAMETER 1
CODE AISC UNIFIED 2010
METHOD LRFD
FU 9360 MEMB 5 10 19 20 35 TO 37 49 50 55 61 91 93 95 97 104 105 107 TO 109 -
111 112 148 150 152 153
FU 8352 MEMB 1 TO 4 17 18 47 48 51 TO 54 92 94 96 98 113 114 118 TO 123 125 -
132 134 135 139 154 156 158 161 163 TO 168 173 TO 175 180 TO 182
FYLD 7200 MEMB 5 10 19 20 35 TO 37 49 50 55 61 91 93 95 97 104 105 -
107 TO 109 111 112 148 150 152 153
FYLD 6624 MEMB 1 TO 4 51 TO 54 113 114 118 TO 121 134 135 173 TO 175
FYLD 5184 MEMB 17 18 47 48 92 94 96 98 122 123 125 132 139 154 156 158 161 -
163 TO 168 180 TO 182
DJ2 8 MEMB 19 35 49
DJ1 39 MEMB 19 35 49
DJ2 39 MEMB 51 53
DJ1 32 MEMB 51 53
DJ2 1 MEMB 1 3
DJ1 8 MEMB 1 3
DJ2 39 MEMB 55 61 91 95 105
DJ1 79 MEMB 55 61 91 95 105
DJ2 8 MEMB 5 10 93 97 107
DJ1 10 MEMB 5 10 93 97 107
DJ2 9 MEMB 36 152 153
DJ1 100 MEMB 36 152 153
DJ2 62 MEMB 104 109 112
DJ1 77 MEMB 104 109 112
DJ2 33 MEMB 52 54
DJ1 79 MEMB 52 54
DJ2 2 MEMB 2 4
DJ1 10 MEMB 2 4
DJ2 10 MEMB 20 37 50 148 150
DJ1 79 MEMB 20 37 50 148 150
DJ2 111 MEMB 123 164
DJ1 81 MEMB 123 164
DJ2 110 MEMB 122 163
DJ1 105 MEMB 122 163
DJ2 104 MEMB 118 173
DJ1 103 MEMB 118 173
DJ2 106 MEMB 134 175
DJ1 102 MEMB 134 175
DJ2 105 MEMB 120 174
DJ1 100 MEMB 120 174
DFF 360 ALL
LZ 7 MEMB 5 10 55 61 91 93 95 97 105 107
LZ 15 MEMB 122 123 163 164
LZ 25 MEMB 19 35 49 104 109 112
LZ 28 MEMB 20 36 37 50 148 150 152 153
LY 28 MEMB 19 20 35 TO 37 49 50 104 109 112 148 150 152 153
LY 13 MEMB 5 10 55 61 91 93 95 97 105 107
LY 12 MEMB 125 158 161 166 TO 168 180 181
LY 7.5 MEMB 122 123 163 164
LY 5.5 MEMB 132 139 154 156 169 170 172
KZ 2 MEMB 1 TO 4 51 TO 54 113 114 118 TO 121 134 135 173 TO 175
KY 2 MEMB 1 TO 4 51 TO 54 113 114 118 TO 121 134 135 173 TO 175
CHECK CODE ALL
FINISH
 
Replies continue below

Recommended for you

I changed the support type to rotationally fixed about the global Y-Axis and the instabilities disappeared.

The command was:

1 2 32 33 67 69 FIXED BUT MX MZ

Realistically, that is what you are going to have (whether you want it or not) if the base plate has 2 or more anchors. The rotational forces that develop are minimal. (And should result in minimal shears in your bolts.)

 
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