How to calculate the carrying capacity of the column

1. Descriptive geometry (including a sheet thickness) of the beams, supports, and is much smaller than the length dimension. For example, the cross-sectional dimensions of the columns of the continental ranges from 30 mm x 150 x 120mm. General time node is me. N 300mm fluorescent lamp, and a core is more than 10 times. The aspect ratio of greater support, sometimes more than 100 times, so the plug in the rack, the structure can be simplified.

2. The relationship between the assembled beam column shelf can be considered to be a semi-rigid, which are generally handled in a non obvious. In fact, the hinge joint is a key node in the assembled shelf structure To the heart of the welded metal. The rigid joints should be considered. In fact, under the action of a load, geometry and position of the shelf structure drive without deformation of the penis. All of them kept constant, the rack can also simplify the structure. In the structure of steel frame or truss structure, which is also the basis of the analysis of mechanical processing rack steel structure elements identified.

3. Prefabricated steel structure is generally a fixed structure. Due to the large deformation of some structural elements, it is necessary to increase the restriction by a specific fixed structure the conversion of fixed the structure inner force calculation problem in K By simplifying the structure for individual specific means. Internal force calculation problem consists of "road". The total internal force reaction forces and a fixed structure can calculate the equilibrium condition and deformation condition should also be considered. For example, in the method of strength calculation of surplus unknown force is calculated by equation of force (distortion). The internal force map is superimposed by M=∑MiXi+MP.