A Beam-Column Reinforced Joint with Variable Thickness of Beam End Flange
A reinforced, variable-thickness technology, used in buildings, building components, earthquake-proof and other directions, can solve the problems of complex stress state of nodes, stress concentration at the end of cover plate, unfavorable stress of beam-column connection, etc., so as to improve the utilization rate of materials. , The effect of reducing production and installation steps and reducing installation costs
Active Publication Date: 2019-01-04
TSINGHUA UNIV +1
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Problems solved by technology
However, there are some deficiencies in this cover-type reinforced joint connection. The length of the cover plate has little influence on the strength, stiffness, and ductility of the beam-to-column connection. The stress concentration of the joint is unfavorable to the force bearing of the beam-column connection; as the length increases, not only is the steel wasted, but also the welding of the cover plate and the flange leads to the increase of the heat-affected zone and the increase of welding defects, which makes the stress state of the joint complicated, and has a great impact on the joint. More adverse effects
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[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0015] Such as Figure 1A , 1B , 1C, the present invention proposes the following three forms of beam-column reinforced joints with variable thickness of beam end flanges. Type I node ( Figure 1A ): the upper surface of the upper flange 3a is inclined and the lower surface is horizontal; the upper surface of the lower flange 3a' is horizontal and the lower surface is inclined; the type II node ( Figure 1B ): the upper surface of the upper flange 3b is horizontal and the lower surface is inclined; the upper surface of the lower flange 3b' is inclined and the lower surface is horizontal; the type III node ( Figure 1C ): the upper surface of the upper flange 3c is horizontal and the lower surface is inclined; the upper surface of the lower flange 3c' is horizontal and the lower surface is inclined. The height of the web plate of type I join...
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The invention discloses a novel beam-column reinforced joint with a variable-thickness flange at the end part of a beam. The reinforced joint is formed by bolt welding connection of a beam with a longitudinal variable-cross-section steel plate as a flange and a column. According to a stress form, the thickness of a beam flange changes in a certain zone at the joint, and by selecting reasonable thickness variation gradient through design calculation, strength, rigidity and energy dissipation capacity of the joint are ensured. During mounting, firstly, a beam web is connected onto a shear plate of a column flange through high-strength bolts used as positioning bolts, a full-penetration single-sided groove of a beam longitudinal variable-thickness flange is welded to the column flange, after the beam flange and the column flange are welded well, the high-strength bolts are screwed, and thus mounting is completed. According to the joint provided by the invention, integration of the flange and a reinforced cover plate is realized, so that influences of local stress concentration and welding are avoided, processing and mounting steps are simple, the utilization ratio of the materials is high, the construction cost is low, strength and rigidity of the joint are ensured, energy dissipation capacity is high and the novel beam column reinforced joint can be applied to seismic fortified areas.
Description
technical field [0001] The invention relates to the technical field of beam-column connection in steel structure buildings, more specifically, to a novel reinforced joint for beam-column rigid connection, in particular to a novel beam-column reinforced joint with variable thickness of beam end flanges. technical background [0002] Frame structure is a common structural system in steel structure buildings. In order to realize the design idea of "strong columns and weak beams, strong nodes and weak components" and avoid brittle failure of beam-column joints under strong earthquakes, the cover-plate-reinforced type is often used at present. node to improve the seismic performance of the node. However, there are some deficiencies in this cover-type reinforced joint connection. The length of the cover plate has little influence on the strength, stiffness, and ductility of the beam-to-column connection. The stress concentration of the joint is unfavorable to the force bearing ...
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IPC IPC(8): E04B1/58E04B1/98
Inventor 王元清刘明刘晓玲李新玲杨军李文斌
Owner TSINGHUA UNIV