R/C BUILDING
Reactions by Area Method - Advanced
R/C BUILDING software has two alternative methods to evaluate the reaction on the walls and columns: Static Analysis and Contributory Area. Now, we have improved the Area Method. The new Are Method is called: Contributory Area – Advanced. The old Area method will "snap" the load to the closes support. This is accurate if there is only UDL load is applied. But if there is some point load or line load, then the old Area method will "snap" 100% of the point load to the closes support. For example, if we consider a rectangular slab, supported by 4 column and a point load of 100kN. (see figure below)
Geometry and Loading
The Static Analysis will provide the following reactions.
The old Area method (Basic), will "send" the entire point load to the closes column.
Now, the new Area method (Advanced) will distribute the point load on all column according to the distance. (see figure below)
The new Area Method (Advanced) will provide better results for reaction on walls and column supporting a transfer floor. We can observer that the Advanced Area Method will distribute larger portion of the load to the closes support, in comparisons with the Static Analysis. The distribution of the UDL load is identical in both Basic and Advance Area Method.
The user can select either Basic or Advance Area methos by setting the Model and Solver options.
17/08/2005, www.inducta.com.au