Preliminary examination questions of the ninth national college students' structural design competition

Competition topic: Manual and 3D printing assembly of mountain bridge model III. Overall model requirements

1, the whole model * * * consists of three mountains and bridge sections (A, B and C respectively) connecting the three mountains, which are placed in a horizontal plane with a range of 2300mm× 1500mm.

2. The positions and bridge routes of the three mountains are fixed, and the mountain is given by the organizer and placed in a fixed position. 3. Each team completes the fabrication of three bridges, A, B and C * *, according to the fixed bridging route, and meets the final loading requirements.

Title: Cantilever roof structure of stadium

1, competition mode

The competition model is a cantilever roof structure on the upper part of the stadium grandstand, made of wood, and the specific structural form is not limited. The model includes three parts: lower frame, transition steel plate and upper shed structure. The first two parts are connected by bolts and provided by the organizer; The canopy structure is designed and manufactured by the contestants and connected with the transition steel plate by bolts.