09-16-2010, 10:32 PM
You need to add one more primary load case naming NATURAL FREQUENCY and list all loads categorized as dead loads inside load case NATURAL FREQUENCY by substituting the global coordinate as GX. Here is an example.
STAAD SPACE HL5E HL5E01
* STAAD FILE FREQCHK.STD
UNITS FEET KIP
*****FOR UNCORRODED FREQUENCY CHECK
*** 22.97 FOOT DIAMETER 196.85 FOOT HIGH STACK
**** WIND VELOCITY = 117 MPH; EXP CAT = C; I = 1.15
JOINT COORDINATES
1 0.0 0.0 0.0 197 0.0 196 0.0
*
MEMBER INCIDENCES
1 1 2 196 1 1
UNITS INCH POUND
MEMBER PROPERTIES
138 TO 196 TA ST PIPE OD 276.2205 ID 275.5906
112 TO 137 TA ST PIPE OD 276.3780 ID 275.5906
60 TO 111 TA ST PIPE OD 276.6929 ID 275.5906
1 TO 59 TA ST PIPE OD 277.0079 ID 275.5906
*
*
*
*
*
*
*
*
CONSTANTS
E 29539300 ALL
*DENSITY 0.283 ALL
* SHELL DISTIBUTION
DENSITY 0.332 MEMBER 1 TO 3
* BASE RING DISTIBUTION
DENSITY 4.061 MEMBER 4
* SHELL
DENSITY 0.332 MEMBER 5 TO 8
* LOWER BREECH
DENSITY 3.116 MEMBER 9
* SHELL
DENSITY 0.332 MEMBER 10 TO 82
* UPPER BREECH
DENSITY 3.563 MEMBER 83
* SHELL
DENSITY 0.332 MEMBER 84 TO 91
* LOWER PLATFORM
DENSITY 4.570 MEMBER 92
* SHELL
DENSITY 0.332 MEMBER 93 TO 139
* INTERMEDIATE PLATFORM 1
DENSITY 2.012 MEMBER 140
* SHELL
DENSITY 0.332 MEMBER 141 TO 159
*INTERMEDIATE PLATFORM 2
DENSITY 4.387 MEMBER 160
* SHELL
DENSITY 0.332 MEMBER 161 TO 179
* TOP PLATFORM
DENSITY 5.738 MEMBER 180
* SHELL
DENSITY 0.332 MEMBER 181 TO 196
* DAMPER
DENSITY 3.406 MEMBER 94
* SILENCER
DENSITY 4.299 MEMBER 116
SUPPORTS
1 FIXED
UNITS FEET POUNDS
*****************************************************
LOADING 1 DEAD LOAD
*****************************************************
SELFWEIGHT Y -1
*
*
*
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 140
MEMBER LOAD
140 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 120
MEMBER LOAD
120 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 100
MEMBER LOAD
100 CMOM GX 26365
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 61048
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GY -96.9
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GY -72.1
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GY -72.1
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GY -72.1
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GY -72.1
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GY -72.1
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GY -3
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GY -30
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GY -30
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GY -30
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GY -289.3
****************************************************
LOADING 2 NATURAL FREQUENCY
****************************************************
SELFWEIGHT X 1.0
*
*
*
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 140
MEMBER LOAD
140 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 120
MEMBER LOAD
120 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 100
MEMBER LOAD
100 CMOM GX 26365
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 61048
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GX 96.9
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GX 72.1
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GX 72.1
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GX 72.1
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GX 72.1
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GX 72.1
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GX 3
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GX 30
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GX 30
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GX 30
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GX 289.3
CALCULATE NATURAL FREQUENCY
*******************************************************
LOADING 3 WIND
*******************************************************
MEMBER LOAD
138 TO 196 LIN Z 1047 1322
112 TO 137 LIN Z 917 1047
60 TO 111 LIN Z 646 917
1 TO 59 LIN Z 307 646
*
*
*
*
*
*
*
*
********************************************************
LOADING 4 SEISMIC
********************************************************
* SEISMIC FACTOR = 0·W
SELFWEIGHT X 0
* INTERMEDIATE PLATFORM 1 MOMENT
MEMBER LOAD
140 CMOM GX 0
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 0
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GX 0
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GX 0
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GX 0
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GX 0
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GX 0
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GX 0
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GX 0
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GX 0
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GX 0
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GX 0
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GX 0
*****************************************************
LOADING 5 SPECTRUM LOAD
*****************************************************
SELFWEIGHT X 1
*
*
*
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 140
MEMBER LOAD
140 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 120
MEMBER LOAD
120 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 100
MEMBER LOAD
100 CMOM GX 26365
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 61048
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GX 96.9
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GX 72.1
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GX 72.1
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GX 72.1
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GX 72.1
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GX 72.1
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GX 3
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GX 30
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GX 30
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GX 30
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GX 289.3
* SEISMIC AG:0.22g
SPECTRUM CQC X 1 ACC SCALE 32.2 DAMP 0.02 LIN
0 0.253; 0.2 0.77; 0.6 0.77; 0.7 0.627; 0.8 0.517; 0.9 0.462;
1.1 0.396; 1.2 0.363; 1.4 0.319; 1.6 0.286; 1.8 0.275; 2 0.2728;
LOAD COMB 100 DEAD LOAD
1 1.0
LOAD COMB 101 DEAD+SPECTRUMX
1 1.0 5 1.0
UNITS FEET KIP
PERFORM ANALYSIS
PRINT SUPPORT REACTION
LOAD LIST 3
PRINT JOINT DISPLACEMENT LIST 83 197
STEEL TAKEOFF
FINISH
Take a look at LOADING NATURAL FREQUENCY. Then run the analysis and go to STAAD REPORT and search Natural Frequency.
STAAD SPACE HL5E HL5E01
* STAAD FILE FREQCHK.STD
UNITS FEET KIP
*****FOR UNCORRODED FREQUENCY CHECK
*** 22.97 FOOT DIAMETER 196.85 FOOT HIGH STACK
**** WIND VELOCITY = 117 MPH; EXP CAT = C; I = 1.15
JOINT COORDINATES
1 0.0 0.0 0.0 197 0.0 196 0.0
*
MEMBER INCIDENCES
1 1 2 196 1 1
UNITS INCH POUND
MEMBER PROPERTIES
138 TO 196 TA ST PIPE OD 276.2205 ID 275.5906
112 TO 137 TA ST PIPE OD 276.3780 ID 275.5906
60 TO 111 TA ST PIPE OD 276.6929 ID 275.5906
1 TO 59 TA ST PIPE OD 277.0079 ID 275.5906
*
*
*
*
*
*
*
*
CONSTANTS
E 29539300 ALL
*DENSITY 0.283 ALL
* SHELL DISTIBUTION
DENSITY 0.332 MEMBER 1 TO 3
* BASE RING DISTIBUTION
DENSITY 4.061 MEMBER 4
* SHELL
DENSITY 0.332 MEMBER 5 TO 8
* LOWER BREECH
DENSITY 3.116 MEMBER 9
* SHELL
DENSITY 0.332 MEMBER 10 TO 82
* UPPER BREECH
DENSITY 3.563 MEMBER 83
* SHELL
DENSITY 0.332 MEMBER 84 TO 91
* LOWER PLATFORM
DENSITY 4.570 MEMBER 92
* SHELL
DENSITY 0.332 MEMBER 93 TO 139
* INTERMEDIATE PLATFORM 1
DENSITY 2.012 MEMBER 140
* SHELL
DENSITY 0.332 MEMBER 141 TO 159
*INTERMEDIATE PLATFORM 2
DENSITY 4.387 MEMBER 160
* SHELL
DENSITY 0.332 MEMBER 161 TO 179
* TOP PLATFORM
DENSITY 5.738 MEMBER 180
* SHELL
DENSITY 0.332 MEMBER 181 TO 196
* DAMPER
DENSITY 3.406 MEMBER 94
* SILENCER
DENSITY 4.299 MEMBER 116
SUPPORTS
1 FIXED
UNITS FEET POUNDS
*****************************************************
LOADING 1 DEAD LOAD
*****************************************************
SELFWEIGHT Y -1
*
*
*
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 140
MEMBER LOAD
140 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 120
MEMBER LOAD
120 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 100
MEMBER LOAD
100 CMOM GX 26365
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 61048
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GY -96.9
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GY -72.1
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GY -72.1
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GY -72.1
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GY -72.1
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GY -72.1
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GY -3
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GY -30
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GY -30
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GY -30
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GY -289.3
****************************************************
LOADING 2 NATURAL FREQUENCY
****************************************************
SELFWEIGHT X 1.0
*
*
*
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 140
MEMBER LOAD
140 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 120
MEMBER LOAD
120 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 100
MEMBER LOAD
100 CMOM GX 26365
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 61048
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GX 96.9
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GX 72.1
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GX 72.1
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GX 72.1
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GX 72.1
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GX 72.1
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GX 3
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GX 30
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GX 30
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GX 30
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GX 289.3
CALCULATE NATURAL FREQUENCY
*******************************************************
LOADING 3 WIND
*******************************************************
MEMBER LOAD
138 TO 196 LIN Z 1047 1322
112 TO 137 LIN Z 917 1047
60 TO 111 LIN Z 646 917
1 TO 59 LIN Z 307 646
*
*
*
*
*
*
*
*
********************************************************
LOADING 4 SEISMIC
********************************************************
* SEISMIC FACTOR = 0·W
SELFWEIGHT X 0
* INTERMEDIATE PLATFORM 1 MOMENT
MEMBER LOAD
140 CMOM GX 0
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 0
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GX 0
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GX 0
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GX 0
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GX 0
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GX 0
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GX 0
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GX 0
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GX 0
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GX 0
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GX 0
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GX 0
*****************************************************
LOADING 5 SPECTRUM LOAD
*****************************************************
SELFWEIGHT X 1
*
*
*
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 140
MEMBER LOAD
140 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 120
MEMBER LOAD
120 CMOM GX 26365
* INTERMEDIATE PLATFORM 1 MOMENT @EL. 100
MEMBER LOAD
100 CMOM GX 26365
* INTERMEDIATE PLATFORM 2 MOMENT
MEMBER LOAD
160 CMOM GX 61048
*
*
*
* INSULATION LOAD
MEMBER LOAD
1 TO 196 UNI GX 96.9
* PERSONEL PROTECTION LOAD
* ABOVE BASE
MEMBER LOAD
1 TO 8 UNI GX 72.1
* ABOVE LOWER PLATFORM
MEMBER LOAD
92 TO 100 UNI GX 72.1
* ABOVE INT. PLATFORM 1
MEMBER LOAD
140 TO 148 UNI GX 72.1
* ABOVE INT. PLATFORM 2
MEMBER LOAD
160 TO 168 UNI GX 72.1
* ABOVE TOP PLATFORM
MEMBER LOAD
180 TO 188 UNI GX 72.1
* UNDER LADDER
MEMBER LOAD
92 TO 180 UNI GX 3
*LADDER LOAD
* LADDER 1
MEMBER LOAD
92 TO 140 UNI GX 30
* LADDER 2
MEMBER LOAD
140 TO 160 UNI GX 30
* LADDER 3
MEMBER LOAD
160 TO 180 UNI GX 30
* TRANSITION DUCT WEIGHT
MEMBER LOAD
9 TO 83 UNI GX 289.3
* SEISMIC AG:0.22g
SPECTRUM CQC X 1 ACC SCALE 32.2 DAMP 0.02 LIN
0 0.253; 0.2 0.77; 0.6 0.77; 0.7 0.627; 0.8 0.517; 0.9 0.462;
1.1 0.396; 1.2 0.363; 1.4 0.319; 1.6 0.286; 1.8 0.275; 2 0.2728;
LOAD COMB 100 DEAD LOAD
1 1.0
LOAD COMB 101 DEAD+SPECTRUMX
1 1.0 5 1.0
UNITS FEET KIP
PERFORM ANALYSIS
PRINT SUPPORT REACTION
LOAD LIST 3
PRINT JOINT DISPLACEMENT LIST 83 197
STEEL TAKEOFF
FINISH
Take a look at LOADING NATURAL FREQUENCY. Then run the analysis and go to STAAD REPORT and search Natural Frequency.