Shear Studs in the CIS/2 Export File
Shear Stud information defined by OpenBuildings Designer controls the import and export of shear stud counts and must be defined for models imported from analysis applications and exported CIS/2 models. The value contains the number of studs associated with a member. Multiple groups of studs are represented by a series of integers. They are usually present when a member has other members connected to it and the stud counts are divided along the member. In a typical workflow, the stud size and layout positions along a member are provided by the downstream steel detailing application.
Consider the example value of 3 2 3. This denotes three groups of studs having counts of 3, 2 and 3.
Segmentation
In the case of multiple stud groups on a member, each group is represented as a separate joint. That is, there are three joints written for a stud configuration of 3 2 3. Applications importing the CIS/2 export file can determine the total number of studs associated with a member by totaling the stud counts for each shear stud joint on the member.
CIS/2 Entities
Shear studs are exported to both the design and manufacturing models. A group of studs is represented by the following entities in a CIS/2 design model:
| CIS/2 Entity | Description | Note |
|---|---|---|
| design_joint_system | Overall joint system | One per shear stud group |
| joint_system_mechanism | Describes the fastener mechanism used in the joint and the layout positions of each fastener | The layout positions are approximated. A uniform distribution of studs in a single row is assumed |
| fastener_mechanism | A list of fasteners | The shear stud is the only fastener in the list |
| fastener_simple_shear_connector | Shear stud | Stud diameter and length are set to 0.5 and 1.0 for the design model. Stud diameter and length are set to 0.75 and 3.5 for the manufacturing model. |
Shear Stud Coordinates
Detailing applications calculate the actual positions of the shear studs for manufacturing. Consequently by default, no coordinates of the individual shear studs are calculated and all the shear studs for a particular joint are placed at the origin of the joint. Each shear stud group has a separate coordinate system with the origin at the first stud in the group. The setting Export shear stud coordinates approximates coordinates of shear studs in the joints. The coordinates are calculated based on the assumption that there is a single row of studs evenly spaced along the member.
