D1.H.3 Design Parameters
The following are the parameters for specifying the values for variables associated with the design.
Parameter Name | Default Value | Description |
---|---|---|
CODE | - |
Must be specified as Design code to follow. See TR.48.1 Parameter Specifications. |
ALCLAD | 0 |
Defines if material is Alclad.
|
ALLOY | 34 |
This variable can take on a value from 1 through 40. The default value represents the alloy 6061-T6. See Table 14A.2 below for a list of values for this parameter and the alloy they represent. Table 3.3-1 in Section I-B of the Aluminum specifications provides information on the properties of the various alloys. |
BEAM | 0.0 | If this parameter is set to 1.0, the adequacy of the member is determined by checking a total of 13 equally spaced locations along the length of the member. If the BEAM value is 0.0, the 13 location check is not conducted, and instead, checking is done only at the locations specified by the SECTION command (See STAAD manual for details). If neither the BEAM parameter nor any SECTION command is specified, STAAD will terminate the run and ask the user to provide one of those 2 commands. This rule is not enforced for TRUSS members. |
DMAX | 1000 in. | Maximum depth permissible for the section during member selection. This value must be provided in the current units. |
DMIN | 0.0 in | Minimum depth required for the section during member selection. This value must be provided in the current units. |
KT | 1.0 |
Effective length factor for torsional buckling. It is a fraction and is unit-less. Values can range from 0.01 (for a column completely prevented from torsional buckling) to any user specified large value. It is used to compute the KL/R ratio for twisting for determining the allowable stress in axial compression. See Equation 3.4.7.2-6 on page I-A-28 of the Aluminum specifications for details. |
KY | 1.0 | Effective length factor for overall column buckling in the local Y-axis. It is a fraction and is unit-less. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the allowable stress in axial compression. |
KZ | 1.0 | Effective length factor for overall column buckling in the local Z-axis. It is a fraction and is unit-less. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the allowable stress in axial compression. |
LT | Member length | Unbraced length for twisting. It is input in the current units of length. Values can range from 0.01 (for a column completely prevented from torsional buckling) to any user specified large value. It is used to compute the KL/R ratio for twisting for determining the allowable stress in axial compression. See Equation 3.4.7.2-6 on page I-A-28 of the Aluminum specifications for details. |
LY | Member length | Effective length for overall column buckling in the local Y-axis. It is input in the current units of length. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the allowable stress in axial compression. |
LZ | Member length | Effective length for overall column buckling in the local Z-axis. It is input in the current units of length. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the allowable stress in axial compression. |
PRODUCT | 1 |
This variable can take on a value from 1 through 4. They represent:
The default value stands for All. The PRODUCT parameter finds mention in Table 3.3-1 in Section I-B of the Aluminum specifications. |
SSY | 0.0 |
Factor that indicates whether or not the structure is subjected to sidesway along the local Y axis of the member. The values are:
The sidesway condition is used to determine the value of Cm explained in Section 4.1.1, page I-A-41 of the Aluminum specifications. |
SSZ | 0.0 |
Factor that indicates whether or not the structure is subjected to sidesway along the local Z axis of the member. The values are:
The sidesway condition is used to determine the value of Cm explained in Section 4.1.1, page I-A-41 of the Aluminum specifications. |
STIFF | Member length | Spacing in the longitudinal direction of shear stiffeners for stiffened flat webs. It is input in the current units of length. See section 3.4.21 on page I-A-40 of the Aluminum specifications for information regarding this parameter. |
STRUCTURE | 1 |
In Table 3.4-1 in Section I-A of the Aluminum specifications, it is mentioned that the value of coefficients nu, ny and na are dependent upon whether the structure being designed is a building or a bridge. Users may convey this information to STAAD using the parameter STRUCTURE. The values that can be assigned to this parameter are:
|
TRACK | 2 |
This parameter is used to control the level of detail in which the design output is reported in the output file. The allowable values are:
|
UNL | Member length | Distance between points where the compression flange is braced against buckling or twisting. This value must be provided in the current units. This value is used to compute the allowable stress in bending compression. |
WELD | 0 |
In Table 3.4-2 in Section I-A of the Aluminum specifications, it is mentioned that the value of coefficients Kt and Kc are dependent upon whether or not, the location of the section where design is done is within 1.0 inch of a weld. The WELD parameter is used in STAAD for this purpose. The values that can be assigned to this parameter are:
|
D1.H.3.1 Aluminum Alloys available in STAAD
Value | Name |
---|---|
1 | 1100-H12 |
2 | 1100-H14 |
3 | 2014-T6 |
4 | 2014-T6510 |
5 | 2014-T6511 |
6 | 2014-T651 |
7 | 3003-H12 |
8 | 3003-H14 |
9 | 3003-H16 |
10 | 3003-H18 |
11 | 3004-H32 |
12 | 3004-H34 |
13 | 3004-H36 |
14 | 3004-H38 |
15 | 5005-H12 |
16 | 5005-H14 |
17 | 5005-H32 |
18 | 5005-H34 |
19 | 5050-H32 |
20 | 5050-H34 |
21 | 5052-H32 |
22 | 5052-H34 |
23 | 5083-H111 |
24 | 5086-H111 |
25 | 5086-H116 |
26 | 5086-H32 |
27 | 5086-H34 |
28 | 5454-H111 |
29 | 5454-H112 |
30 | 5456-H111 |
31 | 5456-H112 |
32 | 6005-T5 |
33 | 6105-T5 |
34 | 6061-T6 |
35 | 6061-T6510 |
36 | 6061-T6511 |
37 | 6061-T651 |
38 | 6063-T5 |
39 | 6063-T6 |
40 | 6351-T5 |