The counterframe of the window will be fixed to the wall by means of L-shaped steel point brackets with a triangular reinforcement in the middle. For the sake of completeness of the analysis, the verification of the node will be made in the three possible conditions:
1 – Area without bracket
Isotherm 12.6 ° C (red line-point) and minimum temperature point (15.29 ° C) were highlighted.
2 – Bracket area without reinforcement
Isotherm 12.6 ° C (red line-point) and minimum temperature point (13.52 ° C) were highlighted.
3 – Area with bracket and reinforcement
Isotherm 12.6 ° C (red line-point) and minimum temperature point (13.03 ° C) were highlighted.
Below is the trend of the isotherms resulting from the 3D analysis of the defined model. The image represents the trend of temperatures limited to those greater than 12.6 ° C. The point with minimum surface temperature (13.99 ° C) is in correspondence with the layer containing the reinforcement plate of the subframe fixing bracket.
The results of the 3D analysis are comparable to those obtained from two-dimensional simulations, thus confirming their validity.