Hi all,
i need to perform buckling analysis on the curved profile as per my client request. i am attaching my editor on here. when i run the analysis i am getting a error message
**WARNING: MAXIMUM STEPS REACHED WITHOUT CONVERGENCE. INCREASE.
Can anyone help me how to solve this?
Note: when i run without the buckling analysis my results are running well and all members are adequate for pass status
STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 09-Jan-16
JOB NAME Electrial Car Parking
JOB COMMENT Designed Using BS 6399 for wind load
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 0.2995 0.024 0; 3 0.6495 0.057 0; 4 1 0.1 0; 5 1.349 0.1545 0;
6 1.699 0.208 0; 7 2.0495 0.2437 0; 8 2.3995 0.2459 0; 9 2.7495 0.2147 0;
10 3.0995 0.1611 0; 11 3.447 0.096 0; 12 3.799 0.0322 0; 13 4.147 -0.024 0;
14 4.499 -0.05 0; 15 4.849 -0.04996 0; 16 5.199 -0.02744 0; 17 5.49 0 0;
18 1 -2.5 0; 19 4.5 -2.5 0; 20 0 0 2.75; 21 0.2995 0.024 2.75;
22 0.6495 0.057 2.75; 23 1 0.1 2.75; 24 1.349 0.1545 2.75; 25 1.699 0.208 2.75;
26 2.0495 0.2437 2.75; 27 2.3995 0.2459 2.75; 28 2.7495 0.2147 2.75;
29 3.0995 0.1611 2.75; 30 3.447 0.096 2.75; 31 3.799 0.0322 2.75;
32 4.147 -0.024 2.75; 33 4.499 -0.05 2.75; 34 4.849 -0.04996 2.75;
35 5.199 -0.02744 2.75; 36 5.49 0 2.75; 39 0 0 5.5; 40 0.2995 0.024 5.5;
41 0.6495 0.057 5.5; 42 1 0.1 5.5; 43 1.349 0.1545 5.5; 44 1.699 0.208 5.5;
45 2.0495 0.2437 5.5; 46 2.3995 0.2459 5.5; 47 2.7495 0.2147 5.5;
48 3.0995 0.1611 5.5; 49 3.447 0.096 5.5; 50 3.799 0.0322 5.5;
51 4.147 -0.024 5.5; 52 4.499 -0.05 5.5; 53 4.849 -0.04996 5.5;
54 5.199 -0.02744 5.5; 55 5.49 0 5.5; 56 1 -2.5 5.5; 57 4.5 -2.5 5.5;
MEMBER INCIDENCES
1 17 16; 2 16 15; 3 15 14; 4 14 13; 5 13 12; 6 12 11; 7 11 10; 8 10 9; 9 9 8;
10 8 7; 11 7 6; 12 6 5; 13 5 4; 14 4 3; 15 3 2; 16 2 1; 17 18 4; 18 19 14;
19 36 35; 20 35 34; 21 34 33; 22 33 32; 23 32 31; 24 31 30; 25 30 29; 26 29 28;
27 28 27; 28 27 26; 29 26 25; 30 25 24; 31 24 23; 32 23 22; 33 22 21; 34 21 20;
37 55 54; 38 54 53; 39 53 52; 40 52 51; 41 51 50; 42 50 49; 43 49 48; 44 48 47;
45 47 46; 46 46 45; 47 45 44; 48 44 43; 49 43 42; 50 42 41; 51 41 40; 52 40 39;
53 56 42; 54 57 52; 55 1 20; 56 20 39; 57 17 36; 58 36 55; 59 47 28; 60 28 9;
START USER TABLE
TABLE 1
UNIT METER KN
TUBE
RECTUBER1
0.000684 0.08 0.04 0.003 5.58532e-007 1.84292e-007 4.272e-007 0.00048 0.00024
RECTUBER2
0.001136 0.1 0.05 0.004 1.44126e-006 4.73659e-007 1.09865e-006 0.0008 0.0004
END
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 TO 16 19 TO 34 37 TO 52 55 TO 60 UPTABLE 1 RECTUBER1
17 18 53 54 UPTABLE 1 RECTUBER2
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
18 19 56 57 FIXED
LOAD 1 LOADTYPE Dead TITLE DEAD
SELFWEIGHT Y -1
MEMBER LOAD
1 TO 34 37 TO 60 UNI GY -0.0275
LOAD 2 LOADTYPE Wind TITLE WIND LOAD DWN
MEMBER LOAD
1 TO 16 37 TO 52 55 TO 58 UNI GY -0.66
LOAD 3 LOADTYPE Wind TITLE WIND LOAD UP
MEMBER LOAD
1 TO 16 37 TO 52 55 TO 58 UNI GY 1.32
LOAD COMB 4 COMBINATION LOAD CASE 4
1 1.0 2 1.4 3 1.2
PERFORM ANALYSIS PRINT ALL
PARAMETER 1
CODE BS5950
PY 275000 ALL
CHECK CODE ALL
PERFORM BUCKLING ANALYSIS
FINISH