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Quick Start Guide
In order to experiment with the Calculations Spreadsheet you will obviously need to change some values.
The calculations are not highly complicated, but they are inter-dependant, so care must be taken initially when changing values.
For general experimentation, the only values you should need to change are on the first Sheet (Dimensions)
The Dimensions sheet is comprised of the following columns:
- Parameter
- Greening
- Calculated
- Used
Column - Parameter
- A simple description of the Parameter
- Values in this column should NOT be modified.
Column - Greening
- The value of the Parameter as stated in a paper by F. R. Greening
- This study refutes the findings of F. R. Greening, and proves they are misleading.
- Values in this column should NOT be modified.
Column - Calculated
- The value of the Parameter as calculated using the data contained within the rest of the spreadsheet.
- Values in this column should NOT be modified.
Column - Used
- The value of the Parameter that is used for subsequent calculations within the rest of the spreadsheet.
- Values in this column CAN be modified.
- By default the value in this column is a cell reference to either the 'Greening' or 'Calculated' value in the same row.
- To revert to the original value, always replace the cell reference rather than typing in one of the 'Greening' or 'Calculated' values manually.
Special Parameters
The following Parameters have a value of 'y', or 'n' and switch the behaviour of the Calculation Model as described.
Use Constant Floor Mass ? (y/n)
n
- Values in the rest of the spreadsheet use floor-by-floor masses calculated within sheets (Concrete Mass) (Tower Mass)
- This is the most accurate method.
y
- Values in the rest of the spreadsheet use the same mass for every floor
- The value used is contained in the Parameter 'Floor Mass (Above Grade Average)'
Use Constant Crush Energy (y/n)
n
- Values in the rest of the spreadsheet use floor by floor concrete crush energy requirements, which use the scale parameters provided.
- This is the most accurate method.
y
- Values in the rest of the spreadsheet use the same constant energy requirement for every floor.
- If this value is selected and Parameter 'Energy to Crush Concrete per Floor (avg)' is zero, NO energy is used to crush concrete. No concrete is crushed.
Use Constant Support Energy ? (y/n)
n
- Values in the rest of the spreadsheet use floor by floor calculated values taking into account the fact that column thickness at the base of the Tower is 16 times larger at the base than at the roof.
- This is the most accurate method.
y
- Values in the rest of the spreadsheet use the same constant energy value for every floor.
- If this value is selected and Parameter 'Energy to Collapse Support per Floor (avg)' is zero, NO energy is used to break the structural supports in subsequent calculations.
Use Mass Loss (y/n)
n
- Values in the rest of the spreadsheet assume the retention of ALL mass in the system.
- When the collapse reaches floor 1, 100% of the mass of the entire tower is pushing down on it.
y
- Values in the rest of the spreadsheet include the specified proportions of mass loss for each floor impact.
- Mass loss is used to simulate the reduction in mass resulting from debris being ejected from the sides of the Tower.
- Any matter that is not directly over the footprint of the Tower and is not attached to the Tower can apply no force to the remaining Tower floors.
- This is the most accurate method.
A full help file will be available shortly.
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