D12.A.3 Design Parameters
Design parameters communicate specific design decisions to the program. They are set to default values to begin with and may be altered to suite the particular structure.
Parameter Name | Default Value | Description | Reference |
---|---|---|---|
CODE | none |
Must be specified as either NS3472 for NS or NPD for NPD (NOR may also be used for both). 準拠する設計コード。「TR.48.1 パラメータの設定」を参照してください。 |
|
BEAM | 0.0 |
Parameter BEAM 1.0 ALL tells the program to calculate von Mises at 13 sections along each member, and up to 8 points at each section. (Depending on what kind of shape is used.) |
Sec. NS 12.2.2 |
BY | 1.0 | Buckling length coefficient, β for weak axis buckling (y-y) (NOTE: BY > 0.0) | Fig. NS 3 Sec. NS 12.3 |
BZ | 1.0 | Buckling length coefficient, β, for strong axis buckling (z-z) (NOTE: BZ > 0.0) | Fig. NS 3 Sec. NS 12.3 |
CB | 1.0 | Lateral buckling coefficient, Y. Used to calculate the ideal buckling moments, Mvi | Sec. NS2 A5.5.2 Fig. NS2 A5.5.2a)-e) |
CMY | 1.0 | Water depth in meters for hydrostatic pressure calculation for pipe members | Valid for the NPD code only |
CMZ | 0.49 | αLT for sections in connection with lateral buckling | Sec. NS 12.3.4 Fig. NS 6. |
CY CZ |
Default see NS 3472 | Buckling curve coefficient, a about local z-axis (strong axis). Represent the a, a0, b, c, d curve. | Fig. NS 3 Sec. NS 12.2 NS Table 11 |
DMAX | 100.0 [cm] | Maximum allowable depth of steel section. | |
DMIN | 0.0 [cm] | Minimum allowable depth of steel section. | |
FYLD | 235 | Yield strength of steel, fy (St37) [N/mm2 ] | Tab. NS 3 |
MF | 1.1 (NS3472) 1.15 (NPD) | Material factor / Resistance factor, γm | Sec. NS 10.4.2 Sec. NPD 3.1 |
RATIO | 1.0 | Permissible ratio of the actual to allowable stresses. | Sec. NS 12.3.4.2 |
SSY | 0.0 | 0.0 = No sidesway. β calculated. > 0.0 = Sidesway in local y-axis weak axis βM=SSY | Sec. NS 12.3.4 Tab. NS 12 Sec. NPD 3.2.1.4 |
SSZ | 0.0 | 0.0 = No sidesway. β calculated. > 0.0 = Sidesway in local y-axis weak axis βM | Sec. NS 12.3.4 Tab. NS 12 Sec NPD 3.2.1.4 |
TRACK | 0.0 |
Controls the level of detail in the output:
Refer to D12.A.8 Tabulated Results for complete list of available TRACKs and print examples. |
|
UNL | Member length | Effective length for lateral buckling calculations (specify buckling length). Distance between fork supports or between effective side supports for the beam | Sec. NS 12.3 |
The parameter CMY will, when given with negative value, define an inside pressure in pipe members. The pressure corresponds to given water depth in meters.
The parameter CB defines the φ value with respect to calculation of the ideal lateral buckling moment for single symmetric wide flange profiles, ref. NS app. 5.2.2.
D12.A.3.1 Example
* Code check according to NS3472 PARAMETERS CODE NS3472 BEAM 1.0 ALL FYLD 340 ALL MF 1.10 ALL CY 0.49 MEMB 1 CZ 0.49 MEMB 1 BY 0.9 MEMB 1 BZ 0.7 MEMB 1 SSY 1.1 MEMB 1 SSZ 1.3 MEMB 1 CB 0.9 MEMB 1 RATIO 1.0 ALL TRACK 9.0 ALL UNIT KNS METER LOAD LIST 1 CHECK CODE MEMB 1 FINISH