CN105464221A - Partition plate penetrating node for connecting rectangular steel tube concrete column with box-shaped steel beam - Google Patents

Abstract

The invention discloses a partition penetration node for connecting a rectangular steel pipe concrete column with a box-shaped steel beam, which comprises an upper partition and a lower partition welded to the rectangular steel pipe concrete column, and the upper partition and the Four outrigger plates respectively opposite to the webs of the box-shaped steel beams are arranged between the lower partitions, and the outriggers are connected to the webs of the box-shaped steel beams opposite to them through connecting plates; The lower flange plate of the box-shaped steel beam is lapped on the lower diaphragm, and the two are connected by high-strength bolts I; the upper flange plate of the box-shaped steel beam is opposite to the upper diaphragm, and is connected by The cover plate is connected, and the cover plate is respectively welded to the upper flange plate of the box-shaped steel girder and the upper partition plate. The invention has reasonable stress, can form plastic hinges on the beams to absorb and dissipate earthquakes, and can avoid adverse effects of lower flange weld seam defects on the anti-seismic performance of joints, and is convenient and fast in construction.

Description

Diaphragm penetration joints for connecting rectangular concrete-filled steel tube columns to box-shaped steel beams

technical field

The invention belongs to the technical field of building structure engineering, and in particular relates to a partition through joint used for connecting a rectangular steel pipe concrete column and a box-shaped steel beam.

Background technique

The concrete filled steel tube structure is composed of steel tubes filled with concrete. The presence of steel tubes can prevent premature cracking of concrete, and the presence of concrete can prevent premature buckling of steel tubes. The synergistic effect of the two can give full play to the high tensile performance of steel and the compressive performance of concrete. Therefore, it has many advantages such as high bearing capacity, good plasticity and toughness, good seismic performance, significant economic benefits and environmental protection in construction.

The rectangular concrete-filled steel tube structure has the advantages of high flexural rigidity and convenient joint connection. The frame structure system formed by rectangular steel tube concrete columns and steel beams has good application prospects in high-rise and super high-rise buildings due to its flexible layout, simple structure, easy standardization of components, fast construction speed, and low cost. It is generally valued by the engineering field at home and abroad.

Commonly used rectangular concrete-filled steel tube column-H-shaped steel beam connection joints include four types: inner diaphragm joints, outer ring plate joints, diaphragm through joints and outer rib ring plate joints. All four kinds of joints have bolted and welded joints, that is, flange welded and web bolted.

During the Northridge Earthquake in the United States in 1994 and the Hanshin Earthquake in Japan in 1995, brittle failures occurred in many connection nodes of multi-story steel structure buildings. at the gusset plate, etc. The reason is that the design at that time only considered the formation of plastic hinges on the beam to achieve the purpose of absorbing and dissipating earthquakes, while ignoring the influence of the stress concentration in the node domain and the weakening of the section on the bearing capacity of the node, and the influence of the weld seam The quality is difficult to guarantee the impact on the bearing capacity of nodes. And most of the cracks start at the weld of the lower flange, where the weld is interrupted, it is difficult to conduct ultrasonic inspection, and the quality of the weld is difficult to guarantee.

The upper and lower partitions of the partition through-type joints cut off the column body, which weakens the column body to a certain extent, but the overall joint section can be prefabricated in the factory, the on-site construction process is relatively simple, and it is also helpful to realize high-rise buildings Changes in the cross-sectional dimensions of the center pillar. The node structure is simple, easy to make, and the indoor space layout is flexible. The force on the beam flange is directly transmitted to the column side, and the force transmission mechanism is clear, which is conducive to the transmission of bending moment and shear force at the beam end, reduces the local deformation of the steel pipe column wall, and ensures the working performance of the joint. However, there are also disadvantages such as large welding workload, twice welding of the lower flange weld seam, and difficult guarantee of welding quality.

H-shaped steel beams are widely used in the field of steel structures, mainly because of their economical and reasonable cross-sectional shape and good mechanical properties. However, its out-of-plane stability around the weak axis is poor. In some cases where the stability needs to be checked, box-shaped steel beams are often required to meet the requirements, but there are few connection forms between box-shaped steel beams and rectangular CFST columns.

Contents of the invention

In order to solve the technical problems existing in the known technology, the present invention provides a partition through joint for connecting rectangular steel pipe concrete columns and box-shaped steel beams. The purpose of dissipating earthquakes can be avoided, and the adverse effects of weld defects on the lower flange on the seismic performance of joints can be avoided, and the construction is convenient and quick.

The technical solution adopted by the present invention to solve the technical problems existing in the known technology is: a partition through joint for connecting a rectangular concrete-filled steel pipe column with a box-shaped steel beam, including an upper partition welded to the rectangular concrete-filled steel pipe column plate and the lower partition, between the upper partition and the lower partition there are four outriggers respectively opposite to the webs of the box-shaped steel girders, the outriggers and the opposite The webs of the box-shaped steel girder are connected through connecting plates; the lower flange plate of the box-shaped steel girder is lapped on the lower diaphragm, and the two are connected by high-strength bolts I; the box-shaped steel girder The upper flange plate is opposite to the upper partition, and is connected by a cover plate, and the cover plate is respectively welded to the upper flange plate of the box-shaped steel girder and the upper partition.

The connecting plate is located on the outside of the box-shaped steel girder, the connecting plate is welded to the outrigger plate, and the connecting plate is connected to the web of the box-shaped steel beam through high-strength bolts II.

The connecting plate is located on the outer side of the box-shaped steel girder, and the connecting plate is welded to the outrigger plate and the web of the box-shaped steel girder respectively.

The thickness of the overhanging plate is greater than or equal to the thickness of the web of the box-shaped steel beam; the thickness of the upper partition is greater than or equal to the thickness of the upper flange plate of the box-shaped steel beam; the thickness of the lower partition The thickness is greater than or equal to the thickness of the lower flange plate of the box steel girder.

The advantages and positive effects that the present invention has are:

1) Adopt the form of lower bolt and upper welding, which is not sensitive to construction and installation errors, and is less affected by processing and construction errors;

2) Most of the welding work is done in the factory, and the on-site welding work is small, which can effectively reduce the adverse effects of weld defects and stress concentration, and can provide good seismic performance.

3) The structure is simple and the force transmission is clear. Since the lower flange of the box-shaped steel girder is connected with the lower partition by high-strength bolts, and the extension of the lower partition is large, the bearing capacity of the negative moment zone of the box-shaped steel beam is greatly enhanced.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Fig. 2 is 1-1 sectional view of Fig. 1;

Fig. 3 is the 2-2 sectional view of Fig. 1;

Fig. 4 is the structural representation of the finished part in the factory of embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of Embodiment 2 of the present invention;

Fig. 6 is the 3-3 sectional view of Fig. 5;

Fig. 7 is a sectional view of 4-4 of Fig. 5;

Fig. 8 is a schematic structural diagram of the part completed in the factory according to Embodiment 2 of the present invention.

In the figure: 1. Rectangular steel tube concrete column, 2. Box-shaped steel beam, 3. Cover plate, 4. Upper partition, 5. Overhang board, 6. Lower partition, 7. High-strength bolt Ⅰ, 8. Connecting plate , 9, high-strength bolts Ⅱ.

detailed description

In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Figures 1 to 8, a partition through joint for connecting a rectangular steel tube concrete column to a box-shaped steel beam, including an upper partition 4 and a lower partition 6 welded to the rectangular steel tube concrete column 1. Between the upper partition 4 and the lower partition 6, there are four outriggers 5 opposite to the webs of the box-shaped steel girder 2 respectively. The webs of the box-shaped steel girder 2 are connected by connecting plates 8; the lower flange plate of the box-shaped steel girder 2 is lapped on the lower partition 6, and the two are connected by high-strength bolts I7; the box-shaped steel The upper flange plate of the beam 2 is opposite to the upper partition plate 4, and is connected by a cover plate 3, and the cover plate 3 is welded to the upper flange plate of the box-shaped steel beam 2 and the upper partition plate 4 respectively .

There are two forms in which the above-mentioned outrigger plate 5 and the web plate of the box-shaped steel beam 2 opposite to it are connected through a connecting plate 8. The first type: please refer to FIGS. 1 to 4, the connecting plate 8 is located at On the outside of the box-shaped steel beam 2 , the connecting plate 8 is welded to the outrigger plate 5 , and the connecting plate 8 is connected to the web of the box-shaped steel beam 2 through high-strength bolts II 9 . The second type: please refer to Figs. 5-8, the connecting plate 8 is located on the outside of the box-shaped steel girder 2, and the connecting plate 8 is connected to the outer extension plate 5 and the web of the box-shaped steel girder 2. The plates are welded separately.

In the two embodiments shown in the present invention, the thickness of the outrigger plate 5 is greater than or equal to the thickness of the web of the box-shaped steel beam 2; the thickness of the upper partition 4 is greater than or equal to the thickness of the box-shaped steel beam The thickness of the upper flange plate of the steel beam 2; the thickness of the lower partition plate 6 is greater than or equal to the thickness of the lower flange plate of the box steel beam 2.

In terms of stress, the present invention learns from the existing H-shaped steel girder partition through the lower bolt and upper welding method, and sets four overhanging plates between the upper and lower partitions, and connects the web of the box-shaped steel beam 2 to the overhanging plate. On the one hand, the structure is simple and the force transmission is clear; at the same time, the lower flange of the box-shaped steel girder 2 and the lower diaphragm 6 are connected by high-strength bolts I7. The bearing capacity of the negative bending moment area is greatly enhanced, and at the same time, it can avoid the adverse effects of weld defects, effectively prevent the stress concentration caused by welding, and provide good seismic performance.

In terms of construction, the present invention adopts bolt-welding mixed connection, and the welding workload on site is small, so it is convenient for installation and construction. It can significantly shorten the construction period, promote the assembly process, and achieve the goal of convenient construction.

Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art Under the enlightenment of the present invention, people can also make many forms without departing from the purpose of the present invention and the scope of protection of the claims, and these all belong to the protection scope of the present invention.

Claims (4)

1. A clapboard penetration node for connecting a rectangular steel tube concrete column to a box-shaped steel beam, comprising an upper clapboard and a lower clapboard welded to the rectangular steel tube concrete column, characterized in that the upper clapboard There are four overhanging plates respectively opposite to the webs of the box-shaped steel beams between the lower partition and the webs of the box-shaped steel girders opposite to them through the connecting plate connected; the lower flange plate of the box-shaped steel beam is lapped on the lower diaphragm, and the two are connected by high-strength bolts I; the upper flange plate of the box-shaped steel beam is opposite to the upper diaphragm, And connected by a cover plate, the cover plate is welded to the upper flange plate of the box-shaped steel beam and the upper partition respectively. 2. The partition plate penetration node for connecting rectangular steel pipe concrete columns and box-shaped steel beams according to claim 1, wherein the connecting plate is located on the outside of the box-shaped steel beam, and the connecting plate and the box-shaped steel beam The outrigger plate is welded, and the connecting plate is connected with the web plate of the box-shaped steel beam through high-strength bolt II. 3. The partition plate penetration node for connecting rectangular steel pipe concrete columns and box-shaped steel beams according to claim 1, wherein the connecting plate is located on the outside of the box-shaped steel beam, and the connecting plate and the box-shaped steel beam The outrigger plate and the web plate of the box-shaped steel girder are respectively welded. 4. The partition plate penetration node for connecting rectangular steel pipe concrete columns and box steel beams according to claim 1, wherein the thickness of the outrigger plate is greater than or equal to that of the web of the box steel beam Thickness; the thickness of the upper partition is greater than or equal to the thickness of the upper flange plate of the box-shaped steel beam; the thickness of the lower partition is greater than or equal to the thickness of the lower flange plate of the box-shaped steel beam.