开洞
4.2. Geting the position of stress revulsion when shell is made holes through the design software sap2000 that is designed according to the shell texture, and raise the design plan about the edg of holes.
5.In the project of Beijing Flower Village Industrial and Agricultural Product Exhibition and Sale Hall, due to the requirement of height, the two way prestress without bond concrete top slab of the entrance hall has to be rejected entirely along the beams all around on the primary first and second floors, with a 8m×7 45m hole.
