Construction Method and Process Optimization of Prestress Reverse Tensioning for Large-Span Bidirectional Suspension Steel Roof Structures

Table 1

Construction process diagram.

Step	Construction activities	Schematic diagram
First step	Installation of the main truss and roof steel structure (both in a disconnected state), with the installation of pulling cables on the main truss (the main truss and roof steel structure are in a disconnected state)
Second step	Using the pulling cables to gradually tension the main truss to the specified value and then connecting the roof steel structure to both sides of the main truss
Third step	Removing the pulling cables, causing the main truss to rebound, which in turn lifts the roof steel structure upward. During this rebound process, the roof steel structure gains prestress