Steel structure grid structure is a common roof form of large stadiums, industrial plants, waiting hall and other buildings in China. This new type of structure relies on the stress of the steel body itself, and uses bolt balls to connect the steel columns together and support each other alternately, forming a variety of roof spaces in different forms. From a conference room of several meters to an industrial plant with a span of several hundred meters, These are the scope of space grid structure
Characteristics of grid structure:
1. Grid structure is a network structure composed of many bars. It is a high-order statically indeterminate space structure. Grid structure can be divided into flat grid and curved grid
2. The flat space truss is widely used, and its advantages are: space stress system, bar mainly bear axial force, reasonable stress, material saving, good overall performance, high stiffness, good seismic performance, less bar types, suitable for industrial production
3. Flat grid can be divided into two types: cross truss system and pyramid system. The pyramid system has more reasonable force and greater stiffness
4. The ratio of height to short span of space truss is about 1/15. The steel pipe is generally used as the member of space truss, and the ball joint is generally used as the node
