P Delta Method |
Select one of the following options:
設定 | 説明 |
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Large and Small Delta
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Select this option to include both P- large and small
Delta effects (recommended), sometimes referred to as P-δ & P-Δ.
Both the large & small P-Delta effects are included in calculating
the end forces, (5 to 10 iterations will usually be sufficient).
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Large Delta only |
Only include the "PlargeDelta" effects (P-Δ only). STAAD.Pro performs a first order linear analysis
and obtains a set of joint forces, from members/plates based on the large
P-Delta effect, which are then added to the original load vector. A
second analysis is then performed on this updated load vector. |
Stress Stiffening (KG)
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P-Delta analysis including stress stiffening effect of the KG matrix. With this option the global stiffness is adjusted with every iteration.
A regular STAAD.Pro P-Delta Analysis performs a first order linear analysis and obtains a set of joint forces from member/plates based on the large P-Delta effect. These forces are added to the original load vector. A second analysis is then performed on this updated load vector (5 to 10 iterations will usually be sufficient).
In the new P-Delta KG Analysis, that is, with the Kg option selected, the effect of the axial stress after the first analysis is used to modify the stiffness of the member/plates. A second analysis is then performed using the original load vector. Large & small P-Delta effects are always included (1 or 2 iterations will usually be sufficient).
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Number of Iterations (n)
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Specify the number of iterations to be performed. If specified, the program will perform the specified number of iterations whether or not the solution converges. |
Print Option |
Standard STAAD.Pro analysis print options:
設定 | 説明 |
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No Print
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No analysis results will be printed to the output
file.
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Load Data
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Prints all the load data.
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Statics Check
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Provides a summation of the applied loads and support
reactions as well as a summation of moments of the loads and reactions taken
around the origin.
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Statics Load
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Prints everything that
Statics Check does, plus a summation of all
internal and external forces at each joint. This option potentially generates a
large volume of output.
注記: PRINT STATIC LOADでは大量の出力が生成されるため、各ジョイントにおける内力と外力の和の出力はジョイントが1,000未満の構造体に対して行われます。ジョイントが1,000を超える構造物については、この出力は省略されます。
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Mode Shapes
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Prints mode shape values at the joints for all
calculated mode shapes.
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Both
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This option is equivalent to the
Load Data plus
Statics Check options.
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All
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This option is equivalent to the
Load Data plus
Statics Check.
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