H-shaped steel cutting method based on haunched end plates

Abstract

The invention discloses an H-shaped steel cutting method based on haunched end plates. The method includes the steps that the intersection position A of a starting point and the top of a lower web plate of an upper flange of a profiled steel beam is determined, and the position between the web plate and the intersection position B of the bottom of the web plate and a lower flange of a H-shaped steel beam is cut in the angle alpha direction in the flange direction of the H-shaped steel beam, the position between the web plate and the wed plate top C is cut in the direction perpendicular to theAB direction, the upper flanges at the A and the C are cut along the beam height to obtain a triangular web ABC with flanges: a point D between the top AC of the H-shaped web plate is selected, cutting is performed until the edge F is reached in the direction which is alpha / 2 angle with the flanges, the position between the point D and the edge F is cut along a DF line at an angle alpha to DE, theweb plate and the flanges are cut in the beam height direction EG at a point E, the flanges are cut in the beam height at the point D, and the flanges DG are rotated clockwise by alpha to enable theDE and the original DF to be overlapped and welded, and the flanges DG are perpendicular to the web edge BE. The cutting method is simple and quick, the leftover steel material of the steel beam can be made full use, the utilization rate of the steel material is improved, and the engineering cost is effectively saved.

Description

technical field [0001] The invention relates to the technical field of civil engineering structures, in particular to an H-shaped steel cutting method based on a haunched end plate. Background technique [0002] In the past earthquakes, a large number of brittle fractures of the beam-column rigid connection joints occurred in the steel frame, indicating that the full-penetration butt weld between the beam flange and the column, and the high-strength butt weld between the beam web and the shear plate welded on the column The traditional design of rigid joints connected by steel bolts did not meet the expected seismic design requirements. Most of the brittle fractures that occur in earthquakes occur in the lower part of the joints where little or no plastic deformation has developed, causing the lower flange of the beam to become the weak link in the fracture. Therefore, reducing the stress of the butt weld at the flange of the beam and forcing the formation of a plastic hing...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used haunching joints in engineering include oblique haunching and straight haunching. There is no uniform design regulation for the specifications and sizes of such haunching joints. As a result, engineers are more arbitrary when designing haunching and cannot do so. Systematization and serialization also bring some troubles to the construction

Secondly, in previous projects, small sections of H-shaped steel left over from various steel structure frames can be seen everywhere on the construction site, which caused a lot of waste to the project

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