Due to the extreme spatial constraints within the greenhouse, its maximum allowable dimensions are 450 mm × 380 mm. The "double-closed" aluminum alloy section is developed for complex stress conditions and applied in the structures for the first time.
Figure 5 "Double-closed" aluminium alloy section
An aluminum alloy "π-shaped" circular connector was designed to expand the nodal zone at three-member intersections, enhancing joint stiffness and enabling rigid connections. This π-shaped connector also functions as the interior cladding panel for the windows, realizing integrated design.
Figure 6 Aluminium alloy rigid joint node
To achieve the daylighting requirements for the greenhouse, an integrated design of structure and facade was developed and implemented. This method directly connects the glass panels to the structure, with the facade layout of the steel columns perfectly aligned with the curtain wall requirement, thereby eliminating the traditional need for curtain wall mullions.
The core tube serves as the primary lateral load-resisting component against seismic and other
horizontal forces. Meanwhile, the perimeter steel columns function as gravity columns bearing vertical loads, enabling a remarkable reduction in their cross-sections to 400mm × 80mm.
This innovative structural system attains a building height of 22 meters, resulting in lightweight and highly transparent, and representing a typical case study of the largest integrated design project in China.
Figure 7 Integrated design of structure and facade
Figure 8 Greenhouse structural columns and facade
The project is also the only greenhouse in China that preserves industrial heritage while integrating modern technology, reflecting China’s gradual transition from industrial development to low-carbon sustainable development adequately. This ecological landmark in Shanghai provides a pioneering model for future industrial heritage adaptive renovation initiatives project.
Figure 9 Demonstration of industrial heritage renovation