1 - Overview
Performing the analysis on a stack of vertical members can be performed two different ways using the Eriksson Commercial Suite, either by using the Column / Panel Stack or by using reinforcement interrupts. Descriptions of each method can be found below.
2 - Column / Panel Stack
The design file contains the design information for a single precast element and thus only a single elements results are reported.
2.1 - Methodology
The addition of a member stack to a design is handled by converting the additional members and loads into loads that act on the top of the design file. This is done by performing an analysis on the entire system in order to determine what forces and moments are being transferred from the above system into the design file. Once this is found, those loads are added to the currently design file and the procedure continues the same as it would if it were not a stack.
2.2 - Assumptions
The analysis on the full stack is performed using an elastic first order analysis. Since we do not have reinforcement of the other members in the stack, cracked section properties cannot be calculated and hence are neglected. The full second order analysis is performed on the individual precast element at which point cracking is considered. The panel to panel connections are ignored when performing the analysis on the individual design panel.