The support methods of the space frame structure can be divided into: peripheral support space frame, three-side support space frame, two-side support space frame, point support space frame and space frame combined with peripheral support space frame and point support space frame.
1. Peripheral support space frame means that all the nodes on the peripheral boundary of the space frame are support nodes, and the support nodes can be supported on the top of the column or on the connecting beam. This form of space frame transmits force directly and receives uniform force, which is a common support method.
2. The three-sided support space frame refers to the three-sided support when one side axis of the rectangular building must be designed as an open door and passage due to the needs of production, or when a certain side is not suitable for load-bearing components due to the requirements of the building function. space frame.
3. The space frame supported on both sides refers to the quadrilateral space frame, only the nodes on the opposite two sides are designed as supports, and the other two sides are free sides. This space frame support method is rarely used.
4. The principle of setting the point-supported space frame is to reduce the positive bending moment and deflection, so that the internal force of the entire space frame tends to be uniform. For single-span multi-point support, the cantilever length should be 1/3 of the middle span. For point support, the cantilever length should be 1/4 of the middle span.
5. The space frame combining the peripheral support space frame and the point support space frame refers to the addition of intermediate support points inside the building on the basis of the peripheral support, which can effectively reduce the internal force peak and deflection of the space frame members. This form is especially suitable for large-column net industrial plants, warehouses, exhibition halls and other buildings.
Post time: Aug-20-2022