D1.J.1 Design Operations
STAAD.Pro contains a broad set of facilities for the design of structural members as individual components of an analyzed structure. The member design facilities provide the user with the ability to carry out a number of different design operations. These facilities may be used selectively in accordance with the requirements of the design problem. The operations to perform a design are:
Specify the members and the load cases to be considered in the design;
Specify whether to perform code checking or member selection;
Specify design parameter values, if different from the default values; and
Specify design parameters to carry out joint checks.
These operations may be repeated any number of times depending upon the design requirements.
The basic process is as follows:
Define the STAAD model geometry, loading, and analysis.
Run the analysis and API design which creates the Geometry file (file extension .PUN) and give preliminary design results.
Check and modify the Geometry file as necessary.
Re-run the analysis to read the modified Geometry file for the final design results.
The parameter SELECT 1.0 should not be used while carrying out punching shear checks. It can be used in initial runs for member selection.
No classification of the joint is performed using the loading. For the initial run of an API code check, all joints will be assumed to be a T/Y joint. Refer to D1.J.8 Joint Design for details.
No hydrostatic checks are performed.
D1.J.1.2 Truss Members
A truss member is capable of carrying only axial force. So in design, no time is wasted calculating the allowable bending or shear stresses, thus reducing design time considerably. Therefore, if there is any truss member in an analysis (like bracing or strut, etc.), it is wise to declare it as a truss member rather than as a regular frame member with both ends pinned.