If some load cases will be P-Delta analysis and some case will be linear analysis. How do I put analysis command?

Hi, Seth and Soy

some load cases and load combination will be Pdelta analysis such as dead/wind etc and some will be linear analysis such as response spectra analysis (see command below). My question is: 

1. I was add p-delta analysis after the load case and load combination that need to consider 2nd order effects. And linear analysis after load/load combination without P-delta analysis. Is the input correct below?

2. Do I need to add change after each analysis command? I know it is need for equivalent seismic analysis.

Thanks

LOAD 1 LOADTYPE Seismic TITLE SEISMIC X
IBC LOAD X 1
PDELTA ANALYSIS SMALLDELTA
CHANGE
LOAD 2 LOADTYPE Seismic TITLE SEISMIC Z
IBC LOAD Z 1
PDELTA ANALYSIS SMALLDELTA
CHANGE
LOAD 3 LOADTYPE Dead TITLE DEAD LOAD
REFERENCE LOAD
R1 1.0
LOAD 4 LOADTYPE Wind TITLE WINDX PLUS
WIND LOAD X 1 TYPE 1 OPEN
JOINT LOAD
96 FX 0.047
98 99 FX 0.042
97 FX 0.063
LOAD 5 LOADTYPE Wind TITLE WINDX-NEGATIVE
WIND LOAD -X -1 TYPE 1 OPEN
JOINT LOAD
96 FX -0.047
98 99 FX -0.042
97 FX -0.063
LOAD 6 LOADTYPE Wind TITLE WINDZ
WIND LOAD Z 1 TYPE 1 OPEN
JOINT LOAD
84 TO 89 FZ 0.181
90 FZ 0.109
91 92 FZ 0.092
93 FZ 0.069
94 95 FZ 0.066
96 FZ 0.013
98 99 FZ 0.036
97 FZ 0.054
PDELTA ANALYSIS SMALLDELTA
CHANGE
LOAD 7 LOADTYPE Seismic TITLE RSA-X
SPECTRUM CQC IBC 2006 X 0.89 ACC DAMP 0.05 LIN SAVE
SS 0.306 S1 0.118 SITE CLASS D FA 1.555 FV 2.328 TL 8.000
LOAD 8 LOADTYPE Seismic TITLE RSA-Z
SPECTRUM CQC IBC 2006 Z 3.73 ACC DAMP 0.05 LIN SAVE
SS 0.306 S1 0.118 SITE CLASS A FA 0.800 FV 0.800 TL 8.000
PERFORM ANALYSIS
CHANGE
LOAD 9 LOADTYPE None TITLE SC
JOINT LOAD
86 89 FY 0.359
85 88 FY -0.359
92 FY 0.433
91 FY -0.433
95 FY 0.31
94 FY -0.31
99 FY 0.368
98 FY -0.368
LOAD 10 LOADTYPE None TITLE 1.2D+1.6WX+1.0SC
REPEAT LOAD
3 1.2 4 1.6 9 1.0
LOAD 11 LOADTYPE None TITLE 1.2D-1.6WX+1.0SC
REPEAT LOAD
3 1.2 5 1.6 9 1.0
LOAD 12 LOADTYPE None TITLE 1.2D+1.6WZ+1.0SC
REPEAT LOAD
3 1.2 6 1.6 9 1.0
LOAD 13 LOADTYPE None TITLE WINDX-5 YEAR
REPEAT LOAD
4 0.53
LOAD 14 LOADTYPE None TITLE WINDZ-5 YEAR
REPEAT LOAD
5 0.53
LOAD 15 LOADTYPE None TITLE INSULATOR STRENGTH WX PLUS
REPEAT LOAD
3 1.8 4 1.8 9 1.0
LOAD 16 LOADTYPE None TITLE INSULATOR STRENGTH WX NEGATIVE
REPEAT LOAD
3 1.8 5 1.8 9 1.0
LOAD 17 LOADTYPE None TITLE INSULATOR STRENGTH WZ
REPEAT LOAD
3 1.8 6 1.8 9 1.0
PDELTA ANALYSIS SMALLDELTA
CHANGE
LOAD COMB 18 1.2D+1.0RSA-X (SEISMIC IN X DIRECTION)
3 1.2 7 1.0
LOAD COMB 19 1.2D-1.0RSA-X (SEISMIC IN X DIRECTION)
3 1.2 7 -1.0
LOAD COMB 20 1.2D+1.0RSA-Z (SEISMIC IN Z DIRECTION)
3 1.2 8 1.0
LOAD COMB 21 1.2D-1.0RSA-Z (SEISMIC IN Z DIRECTION)
3 1.2 8 -1.0
LOAD COMB 22 1.2D+1.5RSA-X(OVERSTRENGTH FACTOR IN X)
3 1.2 7 1.5
LOAD COMB 23 1.2D-1.5RSA-X(OVERSTRENGTH FACTOR IN X)
3 1.2 7 -1.5
LOAD COMB 24 1.2D+1.5RSA-Z (OVERSTREGNTH FACTOR IN Z)
3 1.2 8 1.5
LOAD COMB 25 1.2D-1.5RSA-Z (OVERSTREGNTH FACTOR IN Z)
3 1.2 8 -1.5
PERFORM ANALYSIS

Parents
  • Here is what you can do

    LOAD 1 LOADTYPE Seismic TITLE SEISMIC X
    IBC LOAD X 1
    PERFORM ANALYSIS
    CHANGE
    LOAD 2 LOADTYPE Seismic TITLE SEISMIC Z
    IBC LOAD Z 1
    PERFORM ANALYSIS
    CHANGE
    LOAD 3 LOADTYPE Dead TITLE DEAD LOAD
    REFERENCE LOAD
    R1 1.0
    LOAD 4 LOADTYPE Wind TITLE WINDX PLUS
    WIND LOAD X 1 TYPE 1 OPEN
    JOINT LOAD
    96 FX 0.047
    98 99 FX 0.042
    97 FX 0.063
    LOAD 5 LOADTYPE Wind TITLE WINDX-NEGATIVE
    WIND LOAD -X -1 TYPE 1 OPEN
    JOINT LOAD
    96 FX -0.047
    98 99 FX -0.042
    97 FX -0.063
    LOAD 6 LOADTYPE Wind TITLE WINDZ
    WIND LOAD Z 1 TYPE 1 OPEN
    JOINT LOAD
    84 TO 89 FZ 0.181
    90 FZ 0.109
    91 92 FZ 0.092
    93 FZ 0.069
    94 95 FZ 0.066
    96 FZ 0.013
    98 99 FZ 0.036
    97 FZ 0.054
    LOAD 7 LOADTYPE Seismic TITLE RSA-X
    SPECTRUM CQC IBC 2006 X 0.89 ACC DAMP 0.05 LIN SAVE
    SS 0.306 S1 0.118 SITE CLASS D FA 1.555 FV 2.328 TL 8.000
    LOAD 8 LOADTYPE Seismic TITLE RSA-Z
    SPECTRUM CQC IBC 2006 Z 3.73 ACC DAMP 0.05 LIN SAVE
    SS 0.306 S1 0.118 SITE CLASS A FA 0.800 FV 0.800 TL 8.000
    LOAD 9 LOADTYPE None TITLE SC
    JOINT LOAD
    86 89 FY 0.359
    85 88 FY -0.359
    92 FY 0.433
    91 FY -0.433
    95 FY 0.31
    94 FY -0.31
    99 FY 0.368
    98 FY -0.368

    PERFORM ANALYSIS
    CHANGE
    LOAD 10 LOADTYPE None TITLE 1.2D+1.6WX+1.0SC
    REPEAT LOAD
    3 1.2 4 1.6 9 1.0
    LOAD 11 LOADTYPE None TITLE 1.2D-1.6WX+1.0SC
    REPEAT LOAD
    3 1.2 5 1.6 9 1.0
    LOAD 12 LOADTYPE None TITLE 1.2D+1.6WZ+1.0SC
    REPEAT LOAD
    3 1.2 6 1.6 9 1.0
    LOAD 13 LOADTYPE None TITLE WINDX-5 YEAR
    REPEAT LOAD
    4 0.53
    LOAD 14 LOADTYPE None TITLE WINDZ-5 YEAR
    REPEAT LOAD
    5 0.53
    LOAD 15 LOADTYPE None TITLE INSULATOR STRENGTH WX PLUS
    REPEAT LOAD
    3 1.8 4 1.8 9 1.0
    LOAD 16 LOADTYPE None TITLE INSULATOR STRENGTH WX NEGATIVE
    REPEAT LOAD
    3 1.8 5 1.8 9 1.0
    LOAD 17 LOADTYPE None TITLE INSULATOR STRENGTH WZ
    REPEAT LOAD
    3 1.8 6 1.8 9 1.0
    LOAD COMB 18 1.2D+1.0RSA-X (SEISMIC IN X DIRECTION)
    3 1.2 7 1.0
    LOAD COMB 19 1.2D-1.0RSA-X (SEISMIC IN X DIRECTION)
    3 1.2 7 -1.0
    LOAD COMB 20 1.2D+1.0RSA-Z (SEISMIC IN Z DIRECTION)
    3 1.2 8 1.0
    LOAD COMB 21 1.2D-1.0RSA-Z (SEISMIC IN Z DIRECTION)
    3 1.2 8 -1.0
    LOAD COMB 22 1.2D+1.5RSA-X(OVERSTRENGTH FACTOR IN X)
    3 1.2 7 1.5
    LOAD COMB 23 1.2D-1.5RSA-X(OVERSTRENGTH FACTOR IN X)
    3 1.2 7 -1.5
    LOAD COMB 24 1.2D+1.5RSA-Z (OVERSTREGNTH FACTOR IN Z)
    3 1.2 8 1.5
    LOAD COMB 25 1.2D-1.5RSA-Z (OVERSTREGNTH FACTOR IN Z)
    3 1.2 8 -1.5

    PDELTA ANALYSIS SMALLDELTA
    CHANGE



Reply
  • Here is what you can do

    LOAD 1 LOADTYPE Seismic TITLE SEISMIC X
    IBC LOAD X 1
    PERFORM ANALYSIS
    CHANGE
    LOAD 2 LOADTYPE Seismic TITLE SEISMIC Z
    IBC LOAD Z 1
    PERFORM ANALYSIS
    CHANGE
    LOAD 3 LOADTYPE Dead TITLE DEAD LOAD
    REFERENCE LOAD
    R1 1.0
    LOAD 4 LOADTYPE Wind TITLE WINDX PLUS
    WIND LOAD X 1 TYPE 1 OPEN
    JOINT LOAD
    96 FX 0.047
    98 99 FX 0.042
    97 FX 0.063
    LOAD 5 LOADTYPE Wind TITLE WINDX-NEGATIVE
    WIND LOAD -X -1 TYPE 1 OPEN
    JOINT LOAD
    96 FX -0.047
    98 99 FX -0.042
    97 FX -0.063
    LOAD 6 LOADTYPE Wind TITLE WINDZ
    WIND LOAD Z 1 TYPE 1 OPEN
    JOINT LOAD
    84 TO 89 FZ 0.181
    90 FZ 0.109
    91 92 FZ 0.092
    93 FZ 0.069
    94 95 FZ 0.066
    96 FZ 0.013
    98 99 FZ 0.036
    97 FZ 0.054
    LOAD 7 LOADTYPE Seismic TITLE RSA-X
    SPECTRUM CQC IBC 2006 X 0.89 ACC DAMP 0.05 LIN SAVE
    SS 0.306 S1 0.118 SITE CLASS D FA 1.555 FV 2.328 TL 8.000
    LOAD 8 LOADTYPE Seismic TITLE RSA-Z
    SPECTRUM CQC IBC 2006 Z 3.73 ACC DAMP 0.05 LIN SAVE
    SS 0.306 S1 0.118 SITE CLASS A FA 0.800 FV 0.800 TL 8.000
    LOAD 9 LOADTYPE None TITLE SC
    JOINT LOAD
    86 89 FY 0.359
    85 88 FY -0.359
    92 FY 0.433
    91 FY -0.433
    95 FY 0.31
    94 FY -0.31
    99 FY 0.368
    98 FY -0.368

    PERFORM ANALYSIS
    CHANGE
    LOAD 10 LOADTYPE None TITLE 1.2D+1.6WX+1.0SC
    REPEAT LOAD
    3 1.2 4 1.6 9 1.0
    LOAD 11 LOADTYPE None TITLE 1.2D-1.6WX+1.0SC
    REPEAT LOAD
    3 1.2 5 1.6 9 1.0
    LOAD 12 LOADTYPE None TITLE 1.2D+1.6WZ+1.0SC
    REPEAT LOAD
    3 1.2 6 1.6 9 1.0
    LOAD 13 LOADTYPE None TITLE WINDX-5 YEAR
    REPEAT LOAD
    4 0.53
    LOAD 14 LOADTYPE None TITLE WINDZ-5 YEAR
    REPEAT LOAD
    5 0.53
    LOAD 15 LOADTYPE None TITLE INSULATOR STRENGTH WX PLUS
    REPEAT LOAD
    3 1.8 4 1.8 9 1.0
    LOAD 16 LOADTYPE None TITLE INSULATOR STRENGTH WX NEGATIVE
    REPEAT LOAD
    3 1.8 5 1.8 9 1.0
    LOAD 17 LOADTYPE None TITLE INSULATOR STRENGTH WZ
    REPEAT LOAD
    3 1.8 6 1.8 9 1.0
    LOAD COMB 18 1.2D+1.0RSA-X (SEISMIC IN X DIRECTION)
    3 1.2 7 1.0
    LOAD COMB 19 1.2D-1.0RSA-X (SEISMIC IN X DIRECTION)
    3 1.2 7 -1.0
    LOAD COMB 20 1.2D+1.0RSA-Z (SEISMIC IN Z DIRECTION)
    3 1.2 8 1.0
    LOAD COMB 21 1.2D-1.0RSA-Z (SEISMIC IN Z DIRECTION)
    3 1.2 8 -1.0
    LOAD COMB 22 1.2D+1.5RSA-X(OVERSTRENGTH FACTOR IN X)
    3 1.2 7 1.5
    LOAD COMB 23 1.2D-1.5RSA-X(OVERSTRENGTH FACTOR IN X)
    3 1.2 7 -1.5
    LOAD COMB 24 1.2D+1.5RSA-Z (OVERSTREGNTH FACTOR IN Z)
    3 1.2 8 1.5
    LOAD COMB 25 1.2D-1.5RSA-Z (OVERSTREGNTH FACTOR IN Z)
    3 1.2 8 -1.5

    PDELTA ANALYSIS SMALLDELTA
    CHANGE



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