The ULS Design Functions spreadsheet has been updated with further changes related to the new Australian Standard for concrete structures; AS 3600-2018, and with some other fixes. The new version can be downloaded from:
The changes in the new version are:
- The code input now has provision for an additional reduction factor, applied to the concrete stress, for use where the AS 3600 rectangular stress block is being used with a section where the width of the compression zone reduces towards the compression face. The code requires a 5% reduction (factor = 0.95) for circular sections, or a 10% reduction (factor = 0.9) for any other section with reducing width, such as the rotated square section shown below.
- The maximum axial load calculation for Eurocode 2 with non-rectangular stress blocks has been modified to correctly account for steel in compression.
- The routine for finding the depth of the Neutral Axis has been modified to improve performance in sections with multiple layers of reinforcement.