Single-story steel structure workshops are generally space systems consisting of roof structures, columns, crane beams, brake beams (or brake trusses), various supports, and wall frames. These components can be divided into the following categories according to their functions:
(1) The transverse frame consists of the column and the truss or roof beam supported by it. It is the main load-bearing system of the single-story steel structure building, which bears the self-weight, wind and snow loads of the structure and the vertical and lateral loads of the crane. Pass these loads to the foundation.
(2) Roof structure The structural system that bears the load on the roof, including beams, brackets, intermediate roof trusses, skylight frames, purlins, etc. of the transverse frame.
(3) The supporting system includes the support of the roof part and the support between the columns. On the one hand, it forms the longitudinal frame of the single-story steel structure building with columns and crane beams, and bears the longitudinal horizontal load; on the other hand, the main load-bearing system The individual planar structure is connected into the overall structure of the space, thus ensuring the rigidity and stability necessary for the steel structure of the single-storey building.
(4) The crane beam and brake beam (or brake truss) mainly bear the vertical and horizontal loads of the crane and transmit these loads to the transverse frame and the longitudinal frame.
(5), wall frame to withstand the wall's own weight and wind load.
In addition, there are some minor components such as ladders, walkways, doors and windows. In some single-storey factory steel structures, due to process requirements, there is also a working platform.
First, the column network layout
The layout of column rows is to determine the arrangement of the load-bearing columns of the single-story steel structure in a plane, that is, to define the grid formed by their longitudinal and lateral positioning axes. The span of a single-story plant steel structure is the dimension between the longitudinal positioning axes of the columns, and the column spacing of the single-story plant steel structure is the dimension of the columns between the lateral positioning axes.
Second, the temperature expansion joint
Temperature changes will cause structural deformation and cause temperature stress in the steel structure of the plant. Therefore, when the plane size of the factory is large, in order to avoid excessive temperature deformation and temperature stress, temperature joints should be placed in the lateral and longitudinal directions of the steel structure of the plant.
The arrangement of the temperature expansion joints is determined by the longitudinal and lateral lengths of the steel structure. When the temperature is changed, the length of the longitudinal member is large and the deformation of the longitudinal member is large, causing deformation of the entire structure, causing large temperature stress in the member and possibly causing damage to the wall and the roof. In order to avoid such adverse consequences, the horizontal temperature expansion joint is often used to divide the single-layer steel structure into temperature sections that do not affect each other during expansion and contraction.