The core technical principles behind the construction of perforated aluminum profile curtain walls involve using extruded aluminum profiles to form a load-bearing framework and CNC-perforated aluminum panels as a permeable outer skin. The system employs an indirect connection method - linking the main structure, the supporting framework (sub-frame), and the perforated panels - while utilizing open-joint detailing to balance wind pressure, facilitate ventilation and heat dissipation, and modulate light and shadow.
Core Structural Design and Load Transfer
* Framework Support Principle: Rigid grid frameworks are formed using aluminum profiles (vertical mullions and horizontal transoms) to transfer loads - such as wind pressure and self-weight - to the building's main structure via connectors. Since perforation reduces the cross-sectional area and flexural rigidity of the panels, overall stability is ensured through denser sub-frame spacing or by using folded/stiffened panel profiles.
* Indirect Connection Mechanism: Panels are not welded or fully bonded to the framework; instead, they are secured at discrete points using bolts, rivets, or specialized mounting clips (such as hook-on or interlocking systems). This allows for minor panel displacement caused by thermal expansion or wind suction, preventing stress concentrations that could lead to tearing.
* Pressure-Equalized Ventilation Principle: Open-joint installation is employed (leaving panel joints unsealed or creating an open cavity), allowing air to circulate between the interior and exterior of the curtain wall. This balances wind pressure across the cavity, reducing the impact of wind loads on the panels, while the perforations themselves facilitate natural ventilation and heat dissipation.