CN202338033U

CN202338033U - Asymmetrical double-rib-plate reinforced ductility node for steel beam flange

Info

Publication number: CN202338033U
Application number: CN2011202366264U
Authority: CN
Inventors: 王燕; 郁有升; 刘芸; 刘秀丽; 毛辉
Original assignee: Qingdao University of Technology
Current assignee: Qingdao University of Technology
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2012-07-18
Anticipated expiration: 2021-07-06

Abstract

The utility model relates to an asymmetrical double-rib-plate reinforced ductility node for a steel beam flange. The asymmetrical double-rib-plate reinforced ductility node for the steel beam flange is characterized in that an asymmetrical reinforcing mode is applied to the beam end flange at a steel beam column connection node, and the upper flange of the beam is reinforced by adopting two rib plates vertical to the beam flange, wherein the height of the two vertical rib plates is lower than the total thickness of a concrete floor; and the lower flange of the beam is reinforced by adopting a horizontal steel plate. Compared with a symmetrical plate reinforced type node and a symmetrical double (single)-rib-plate reinforced node, the asymmetrical double-rib-plate reinforced ductility node can guarantee that a plastic hinge in a beam end welding line area forcedly shifts outwards under the effect of violent earthquake, and can meet the requirement on a node earthquake proof design. The asymmetrical double-rib-plate reinforced ductility node for the steel beam flange is simple in processing and manufacturing, has smaller welding stress influence, does not occupy a building space and can meet the use function requirement of house buildings. The asymmetrical double-rib-plate reinforced ductility node for the steel beam flange is an earthquake proof node capable of being applied to multistoried and high-rise buildings.

Description

The reinforced ductility joint of steel structure girder edge of a wing asymmetric double floor

Technical field

The utility model patent relates to a kind of steel structure girder column jointing gusset, especially relates to a kind of steel work novel earthquake-proof node.

Background technology

At present, solve the be rigidly connected problem of node brittle destruction af-ter under severe earthquake action of beam column, generally through two approach, the one, flange of beam is carried out local weaken (RBS node) near the failure position the beam column join domain weld seam is moved outward; The 2nd, at the local beam section that strengthens of join domain, improve node ductility, abbreviate reinforced node as.The common purpose of dual mode all is that plastic hinge is shifted out from the welding node zone, avoids plastic hinge to appear at the relatively poor welding point place of toughness, guarantees that node has enough ductility.Weakening type node is to be the purpose of design that cost reaches plasticity development under the severe earthquake action with the bearing capacity that weakens beam section, reduce beam, has big drawback.Reinforced node adopts types such as beam-ends haunch, floor heavier-duty, board-like reinforcement.Beam-ends haunch and floor are strengthened two category nodes and all are employed in the connected mode that the upper and lower edge of a wing of beam symmetry is strengthened, because the bottom flange has reduced the building headway after setting up armpit plate or floor, have a strong impact on the attractive in appearance and function of use of building.And the process for machining and manufacturing of board-like reinforced node is complicated, particularly the stiffener of top flange with formed the twice weld seam after post is connected, cause very big welding stress, the node mechanical property receives very big influence.

Summary of the invention

The object of the invention is exactly that provide in order to overcome the defective that above-mentioned prior art exists a kind of both can guarantee under the violent earthquake effect, to force outside the plastic hinge of beam-ends welded seam area and move; Satisfy the requirement of node seismic design; Do not take architectural space again; Satisfy the function of use requirement of building construction, simultaneously, the node process for machining and manufacturing is simple, welding stress and the less a kind of new steel structure shock-resistant node of welding deformation.

The object of the invention can be realized through following technical scheme: the reinforced ductility joint of steel structure girder edge of a wing asymmetric double floor; It is characterized in that; This steel-structure beam-column node adopts asymmetric double rib slab to strengthen mode to the beam-ends edge of a wing; Adopt double rib slab to strengthen to the top flange of beam, the height of double rib slab adopts horizontal steel plate to strengthen less than 200mm (concrete floor gross thickness) to the bottom flange of beam.

Girder steel is adopted two deep floors vertical with the top flange, and two deep floors adopt vertical weld seam to be connected with the steel column edge of a wing, and two deep floors adopt side seam to be connected with the girder steel edge of a wing.The floor that two vertical direction are placed lay respectively at the beam top flange far from the top flange 1/4 deck-siding place, two edges; The upper and lower weld seam that all is provided with of web passes through the hole; The post stiffening rib adopts the full penetration groove weld to be connected with the post edge of a wing; Adopt horizontal steel plate to strengthen to the bottom flange of girder steel, level is strengthened steel plate and is adopted the groove weld seam to be connected with steel column, and level is strengthened steel plate and adopted four sides weld all around seam to be connected with girder steel.

Described double rib slab adopts the fillet weld welding with the beam top flange and the post edge of a wing respectively, occurs intersecting for avoiding weld seam, floor is made otch handle.Described bottom flange is strengthened adopting the single groove weld of belt material plate to be connected between steel plate and the post edge of a wing, and the bottom flange of beam directly is not connected with pillar, is connected but adopt three limit weld all arounds to stitch with the reinforcement steel plate.

Technical advantage of the present invention is:

Adopt the reinforced ductility joint of asymmetric double floor, can effectively increase node ductility and improve the node anti-seismic performance, under the violent earthquake effect, realize moving outside the plastic hinge.

Adopt double rib slab to compare to reduce beam, the post edge of a wing and be connected neighbouring welding stress and welding deformation with web with single floor.

The reinforcement steel plate that keeps flat is adopted in the bottom flange, can increase the building headway, satisfies the function of use of building.

Compare with two reinforced nodes of (list) floor of board-like reinforced node of the symmetrical expression of present employing and symmetrical expression, it is simple to have a processing and fabricating, does not take architectural space, and welding stress influences advantages such as less.

Description of drawings

Fig. 1 is the three-dimensional structure sketch map of this new ductile node;

Fig. 2 is the positive facade structural representation of this new ductile node;

Fig. 3 is the 1-1 sectional structural map of Fig. 2;

Fig. 4 is the 2-2 sectional structural map of Fig. 2;

Fig. 5 is the 3-3 sectional structural map of Fig. 2.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment this novel earthquake-proof ductility joint is elaborated.

Embodiment:

Like Fig. 1～shown in Figure 3, the bottom flange stiffener adopts the full penetration groove weld to be connected through the liner plate and the post edge of a wing, and after the full penetration groove weld welded and finishes, liner plate still kept.After girder steel was in place, the top flange of beam was connected with the post edge of a wing through liner plate, and after the welding of full penetration groove weld finished, liner plate still kept.The bottom flange adopts three weld all around seams to be connected with stiffener, does not weld with the post edge of a wing.The web of girder steel is connected with the shearing junction plate through high-strength bolt, gives birth to the processing mode of red rust behind the contact surface employing shot-peening, and the shearing junction plate adopts twin fillet wolt to be connected with the post edge of a wing, and the thickness of shearing junction plate should be complementary with the web thickness of girder steel.Two floors adopt fillet weld to be connected with post and flange of beam respectively.Two floors be positioned at the beam top flange far from the top flange the about 1/4 deck-siding place of outward flange.Web all is provided with weld seam up and down through the hole, and the welding of full penetration groove is adopted on the post stiffening rib and the post edge of a wing, and strong design principles design floor such as utilization and edge of a wing stiffener move the beam-ends plastic hinge outward.

As shown in Figure 4, a mild circular arc is all arranged on two floors, main purpose is to make stress get into mild transition when strengthening the district, the stress concentration phenomenon of avoiding the rigidity sudden change to cause.Two floors adopt the fillet weld welding with the beam top flange and the post edge of a wing respectively, occur intersecting for avoiding weld seam, floor is made otch handle.

As shown in Figure 5, the bottom flange stiffener is connected with fillet weld through three weld all arounds with flange of beam, and edge of a wing stiffener is slightly wideer than flange of beam.Stiffener thickness is not less than flange of beam thickness.

Like Fig. 1～shown in Figure 5, the 1-floor, the 2-high-strength bolt, 3-shearing junction plate, the 4-stiffening rib, 5-edge of a wing stiffener, the 6-backing plate, the 7-beam, the 8-post, the 9-weld seam passes through the hole.

Claims

1. the reinforced ductility joint of steel structure girder edge of a wing asymmetric double floor; This is the shock-resistant node that a kind of steel structure girder is connected with post; The asymmetric strong form that adds is adopted on the beam-ends edge of a wing to girder steel; It is characterized in that: girder steel is adopted two deep floors vertical with the top flange, and two deep floors adopt vertical weld seam to be connected with the steel column edge of a wing, and two deep floors adopt side seam to be connected with the girder steel edge of a wing.

2. the reinforced ductility joint of steel structure girder according to claim 1 edge of a wing asymmetric double floor; It is characterized in that: the floor that two vertical direction are placed lay respectively at the beam top flange far from the top flange 1/4 deck-siding place, two edges; The upper and lower weld seam that all is provided with of web passes through the hole; The post stiffening rib adopts the full penetration groove weld to be connected with the post edge of a wing; Adopt horizontal steel plate to strengthen to the bottom flange of girder steel, level is strengthened steel plate and is adopted the groove weld seam to be connected with steel column, and level is strengthened steel plate and adopted four sides weld all around seam to be connected with girder steel.