8. Core Wall Interaction Diagram - spColumn Software

spColumn is a StructurePoint software program that performs the analysis and design of reinforced concrete sections subjected to axial force combined with uniaxial or biaxial bending. Using the provisions of the Strength Design Method and Unified Design Provisions, slenderness considerations are used for moment magnification due to second order effect (P-Delta) for sway and non-sway frames.

For this core wall section, investigation mode was used with no loads (the program will only report control points) and no slenderness considerations using ACI 318-19.

The model editor in spColumn was used to model the section including multiple openings for elevator banks, place the steel reinforcing bars, and define the concrete cover. These steps illustrate handling of irregular shapes and unusual and/or complicated bar arrangements often found in building shear and core walls.

Figure 8 - Core Wall spColumn Modeling

Figure 9 - Defining Loads / Modes (spColumn)

Figure 10 - Core Wall in spColumn Model Editor

Alternatively, the section, openings, and reinforcement arrangement can be imported to spColumn as an AutoCad file (.dxf).

The following figure shows the section being imported to spColumn directly from AutoCad.

Figure 11 - Core Wall Section Using AutoCad (.dxf file)

Figure 12 - Importing Core Wall Section from DXF file to spColumn

The following shows the P-M interaction diagram and input/output report generated by spColumn for the core wall.

Figure 13 - Core Wall P-M Interaction Diagram about the X-Axis (spColumn)