In the construction of steel structure workshop, a large number of small span steel frame structures are usually used. We should not underestimate them. Their structure is also related to the construction quality of steel structure workshop. Therefore, the structure of small and medium span steel frame structure of steel structure workshop has the following requirements:
1. In the same member, the ratio of the minimum height to the maximum height of the section should be controlled between 0.3-0.6; when the ratio between the width and height of the member is large, the smaller value should be adopted.
2. The hinged column base of rigid frame should be constructed with a certain degree of embedment, and the column foot bolt can be calculated according to 20% of the column section bending capacity.
3. When the haunch height of the beam of the rigid frame does not exceed 1 / 2 of the beam, the influence of the haunch can not be considered in the analysis of the rigid frame, and only the person is counted in the calculation of the section.
4. When the end plate connection is used for the corner joint and the roof ridge joint of the rigid frame, the calculation can be made according to the fixed connection. At this time, the joint should be connected with high strength bolts. The thickness of the end plate should not be less than the diameter of the bolt. The bolt arrangement should be close to the flange, web and stiffener of the beam as far as possible, so as to reduce the bending of the end plate.
5. The welding between the end plate and the beam should be equal to the cross section of the beam. When the fillet weld is used, the weld leg size can be generally 1.7t.
6. In the vicinity of the corner of the rigid frame, the inner flange of the beam and column can be added with angle brace by using the strengthened purlin or wall beam as the lateral support of the inner flange.