CN117758881A - Node for connecting steel pipe column and steel beam by adopting cast steel T-shaped piece - Google Patents
Node for connecting steel pipe column and steel beam by adopting cast steel T-shaped piece Download PDFInfo
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- CN117758881A CN117758881A CN202311829587.2A CN202311829587A CN117758881A CN 117758881 A CN117758881 A CN 117758881A CN 202311829587 A CN202311829587 A CN 202311829587A CN 117758881 A CN117758881 A CN 117758881A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 105
- 239000010959 steel Substances 0.000 title claims abstract description 105
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000005265 energy consumption Methods 0.000 claims abstract description 4
- 230000004044 response Effects 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The invention discloses a node for connecting a steel pipe column and a steel beam by adopting a cast steel T-shaped piece, which comprises the steel pipe column and an H-shaped steel beam, wherein the steel pipe column and the H-shaped steel beam are connected through an upper cast steel T-shaped piece and a lower cast steel T-shaped piece instead of being directly welded or connected by adopting bolts, the upper cast steel T-shaped piece and the lower cast steel T-shaped piece are identical in structure and comprise a reverse arc-shaped connecting plate and a horizontal connecting plate, the radian of the reverse arc-shaped connecting plate is identical to the surface radian of the steel pipe column, the reverse arc-shaped connecting plate is directly welded on the steel pipe column without holes, the horizontal connecting plate is integrally connected to the middle part of the reverse arc-shaped connecting plate, and the horizontal connecting plate is connected with a wing plate of the H-shaped steel beam through friction type high-strength bolts. The node of the invention has better anti-seismic performance than a rigid node; the displacement response of the structure under the action of strong vibration can be reduced through the superior energy consumption capability; the anti-seismic requirement of the steel frame structure can be better met.
Description
Technical Field
The invention belongs to the technical field of steel beam connecting mechanisms, and particularly relates to a connecting node of a steel pipe column and an H-shaped steel beam.
Background
The steel pipe node design is always a difficult problem in the hollow pipe structural design, and is more and more paid attention to researchers in various countries. At present, the connection nodes of the round tube beam column can be divided into three main types: first category: the rigid connection frame is provided that the beam-column connection has enough rigidity to keep the original included angle between the crossed rod pieces unchanged, and the beam-column connection of the structure is made into rigid connection; the second category: the simple support frame is characterized in that the large and small beam ends only bear shearing force when only bearing gravity load, and can freely rotate under the gravity load, the connection of the structure is made into shear-resistant connection, and the bending resistance of the connection is ignored; third category: the "semi-rigid frame" or "partially constrained frame" assumes that the beam-end connection has a reliable resistance to a bending moment to a degree intermediate between a rigid-type connection and a simple-type connection, and that the beam-column connection of this construction is made semi-rigid. The allowable stress design specification does not specifically give a standard for dividing the connection types.
Most steel structure buildings adopt more rigid connection modes. The bending and shearing performance of the node is reliable, more applications are realized in engineering, but the node resists beam end shearing force through the friction force between the beam end sealing plates and the column flange, so that the blanking size of the member, particularly each layer of rigid frame beam, and the flatness of the beam end sealing plates are required to be quite accurate, high requirements are provided for manufacturing the steel member, and the lifting and positioning of the steel beam in the field installation process are quite difficult. From the practical engineering, the welding between the beam end sealing plate and the beam can lead the sealing plate to generate the deformation of the warp which can not be overcome, so that the requirements of friction joint surfaces between the beam end sealing plate and the column flange are difficult to be met. And the type of the welding seam of the welding connection node has a larger influence on the performance of the node, and the node is more easy to damage and fail as the loading amplitude is larger. Previous studies have found that rigid welded joints all exhibit brittle failure, and that the depth of the initial crack has the greatest impact on the seismic performance of the H-beam-column joint.
The various components of the node meet at the point, the stress state is quite complex, and the stress concentration phenomenon is quite obvious. Failure of the node often results in failure of the beam-column member, resulting in failure of the entire structure. At present, research work of various nationists on pipe nodes is mainly focused on node strength and rigidity. The experimental study and theoretical analysis for this aspect at home and abroad have not been fully developed.
Due to the great hazard of brittle failure, various countries place ductile demands on the design of rigid steel frames. The design of ductile nodes must meet the following requirements: the load bearing capacity of the ductile mechanism at or near the junction must be lower than any brittle or low ductile failure mechanism that may occur. Thus, yielding of the ductile zone will occur first. Application of these principles in practice requires: (1) has sufficient rigidity; (2) a suitable rotational stiffness; (3) The full overall rigidity in the elastic stage is realized so as to keep the relative position of the beam column unchanged and avoid too large lateral movement; (4) economical manufacture and easy installation. The bending-resistant connection must have sufficient strength to enable the connected components to develop a full section plastic bending moment. In addition to strength, the connection should have some rotational capacity to create moment redistribution so that plastic hinges can be formed at other cross sections.
Therefore, it is needed to find a node connection structure with high construction efficiency and simple connection to realize the node connection between the circular steel pipe column and the steel beam.
Disclosure of Invention
The invention aims to solve the technical problem of providing a node connecting device with high construction efficiency and simple connection so as to realize the node connection between a round steel pipe column and an H-shaped steel beam.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a node that steel tubular column and girder steel adopted cast steel T spare to be connected, includes steel tubular column and H shaped steel roof beam, steel tubular column and H shaped steel roof beam are not through direct welding or adopt bolted connection, but link to each other through upper end cast steel T spare and lower extreme cast steel T spare, upper end cast steel T spare and lower extreme cast steel T spare's structure are the same, including reverse arc connecting plate and horizontal connection board, the radian of reverse arc connecting plate is the same with the surface radian of steel tubular column, and reverse arc connecting plate does not trompil and welds directly on steel tubular column, horizontal connection board integrated into one piece is connected in the middle part of reverse arc connecting plate, and horizontal connection board passes through friction formula high strength bolt and H shaped steel roof beam's pterygoid lamina links to each other.
Further, the friction type high-strength bolts are arranged in a plurality to form a friction type high-strength bolt group, and the friction type high-strength bolt group is arranged in an array mode.
Furthermore, the web plate of the H-shaped steel beam is not directly connected with the steel round pipe column.
Further, high-strength bolt holes are reserved on wing plates of the cast steel T-shaped piece and the H-shaped steel beam in advance, and the machined components are directly transported to a construction site and assembled through friction type high-strength bolts.
Further, the cast steel tee is a semi-rigid node.
Furthermore, the steel pipe column and the H-shaped steel beam are Q235 steel, and the elastic modulus average value is 206000MPa.
Furthermore, the node has better anti-seismic performance than the rigid node, and the node reduces the displacement response of the structure under the action of strong earthquake through energy consumption capability, so that the anti-seismic requirement of the steel frame structure is met.
Compared with the prior art, the invention has the beneficial effects that:
the joint of the steel pipe column and the steel beam, which is connected by adopting the cast steel T-shaped piece, has better anti-seismic performance than a rigid joint; the displacement response of the structure under the action of strong vibration can be reduced by the nodes through superior energy consumption capability; the anti-seismic requirement of the steel frame structure can be better met.
Drawings
FIG. 1 is a side elevational view of a node of the present invention;
FIG. 2 is a three-dimensional model diagram of a node of the present invention;
FIG. 3 is an exploded block diagram of a node of the present invention;
FIG. 4 is a schematic view of the structure of a cast steel tee of the present invention;
fig. 5 is a schematic diagram of the distribution and structure of friction type high strength bolts.
The reference numerals are explained as follows:
1. a steel tubular column; 2. h-shaped steel beams; 2-1, a second bolt hole; 2-2, wing plates; 3. cast steel tee; 3-1, a reverse arc-shaped connecting plate; 3-2, a horizontal connecting plate; 3-3, a first bolt hole; 4. friction type high-strength bolt; 5. and (3) welding seams.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The joint of the steel pipe column and the steel beam connected by adopting the cast steel T-shaped piece is shown in fig. 1-3, and mainly comprises a steel pipe column 1, an H-shaped steel beam 2 and a cast steel T-shaped piece 3 for connecting the steel pipe column 1 and the H-shaped steel beam 2. Wherein:
the steel round tube column 1 is of a hollow round tube structure. The steel pipe column 1 is preferably made of Q235 steel, and the elastic modulus average value is 206000MPa.
The H-shaped steel beam 2 is of an H-shaped structure and comprises a web plate 2-3 in the middle and wing plates 2-2 which are positioned at two ends of the middle and are perpendicular to the web plate 2-3, and a plurality of second bolt holes 2-1 which are arranged in an array mode are prefabricated at one end of each wing plate 2-2. In this embodiment, the number of the second bolt holes 2-1 is preferably 4, the 4 second bolt holes 2-1 are arranged in a square array, and 2 second bolt holes 2-1 are respectively provided on both sides of the web 2-3. The H-shaped steel beam 2 is preferably Q235 steel, and the elastic modulus average value is 206000MPa.
The steel pipe column 1 and the H-shaped steel beam 2 are not connected by direct welding or by bolts, but are connected by cast steel T-pieces 3. The cast steel tees 3 are provided in 2 numbers, i.e. 1 each on the upper and lower sides of the H-beam 2. The cast steel tee 3 has a structure shown in fig. 4 and comprises a reverse arc-shaped connecting plate 3-1 and a horizontal connecting plate 3-2. Wherein, the bending radian of the reverse arc-shaped connecting plate 3-1 is the same as the surface radian of the steel round pipe column 1, the two are directly connected by welding, the reverse arc-shaped connecting plate 3-1 is not provided with any opening, and a welding seam 5 is formed between the reverse arc-shaped connecting plate 3-1 and the steel round pipe column 1; the horizontal connecting plate 3-2 and the reverse arc connecting plate 3-1 are integrally formed into a whole, and the horizontal connecting plate 3-2 is connected to the middle part of the reverse arc connecting plate 3-1. The horizontal connecting plate 3-2 is prefabricated with a plurality of first bolt holes 3-3 arranged according to an array, in this embodiment, the number of the first bolt holes 3-3 is preferably 4, the 4 first bolt holes 3-3 are arranged according to a square array, and the positions of the 4 first bolt holes 3-3 are in one-to-one correspondence with the positions of the 4 second bolt holes 2-1.
The structure of the friction type high-strength bolt 4 is shown in fig. 5, and after the first bolt hole 3-3 of the cast steel T-shaped piece 3 corresponds to the second bolt hole 2-1 of the wing plate 2-2 of the H-shaped steel beam 2 in position, the friction type high-strength bolt 4 is adopted for connection. Namely, the H-shaped steel beam 2 is not directly welded or connected with the steel pipe column 1 by bolts, but is connected by cast steel T-shaped pieces, and the load is transferred to the steel pipe column. Besides this connection, the H-shaped steel beam 2 has no other connection with the steel round tube column 1. In the embodiment, high-strength bolt holes are reserved on the wing plates of the cast steel T-shaped piece and the H-shaped steel beam in advance, the machined components are directly transported to a construction site, and the components are assembled through the friction type high-strength bolts, so that the on-site welding workload is reduced, and the construction speed and the construction quality are greatly improved.
The T-shaped piece connecting joint belongs to a typical semi-rigid joint, and the joint plastic hinge mainly generates larger plastic deformation at the joint of a T-shaped steel web plate and a flange. The strength of the tee depends on the geometry of the tee web and the bolts, ductility depends on the deformability of the tee web, which in turn depends on the mechanical properties of the tee flanges and bolts. The junction of the intersection of the node plate and the steel pipe is a weak link of the node, and when the whole node enters a plastic stage and continues to be loaded, the displacement of the node is rapidly increased and enters a plastic damage state. Therefore, the bearing capacity of the node is greatly improved, so that the node is safe and reliable.
The node has excellent mechanical property and good comprehensive performance, and is a node with a concise and definite force transmission path. The node form is simple to manufacture, and a beam end plate which is easy to generate welding buckling deformation is omitted. The site installation construction is also convenient, and because the upper flange and the lower flange of the steel beam and the rigid joint of the beam column are easy to generate brittle failure, the semi-rigid joint is superior to the rigid joint in the aspects of ductility, rigidity degradation and the like, and is easy to repair after plastic failure. The beam column component adopts the circular steel pipe column and the H-shaped steel beam, so that the stress difference caused by the division of the strong and weak axes of the H-shaped section can be effectively avoided. The plastic hinges of the nodes are mainly concentrated near the T-section steel of the connecting piece, and the yield point is reached first. In the subsequent repeated loading, the T-shaped steel continuously acts on tension and compression force to generate larger deformation, and finally plastic cracking and damage are caused, which is typical of tension and damage characteristics. The connecting piece is a cast steel piece and has stronger rigidity. When the connecting piece is used for connection, the bearing capacity, the rigidity and the ductility of the node are better than those of common welding connection, and the node has stable restoring force characteristics.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a node that steel tubular column and girder steel adopted cast steel T spare to be connected, its characterized in that, including steel tubular column and H shaped steel girder, steel tubular column and H shaped steel girder are not through direct welding or adopt bolted connection, but link to each other through upper end cast steel T spare and lower extreme cast steel T spare, upper end cast steel T spare and lower extreme cast steel T spare's structure is the same, including reverse arc connecting plate and horizontal connecting plate, the radian of reverse arc connecting plate is the same with the surface radian of steel tubular column, and reverse arc connecting plate does not trompil and welds on steel tubular column directly, horizontal connecting plate integrated into one piece ground is connected in the middle part of reverse arc connecting plate, and horizontal connecting plate passes through friction type high strength bolt and H shaped steel girder's pterygoid lamina links to each other.
2. The joint for connecting a steel pipe column and a steel beam by adopting a cast steel T-shaped piece according to claim 1, wherein a plurality of friction-type high-strength bolts are arranged to form a friction-type high-strength bolt group, and the friction-type high-strength bolt group is arranged in an array.
3. A joint for connecting a steel tubular column and a steel beam by adopting a cast steel tee piece according to claim 1, wherein the web of the H-shaped steel beam is not directly connected with the steel tubular column.
4. The joint of a steel pipe column and a steel beam, which is connected by adopting a cast steel T-shaped piece, according to claim 1, wherein high-strength bolt holes are reserved on wing plates of the cast steel T-shaped piece and the H-shaped steel beam in advance, and the processed components are directly transported to a construction site and assembled by friction type high-strength bolts.
5. A joint for connecting a steel pipe string to a steel beam using cast steel tees according to claim 1, wherein said cast steel tees are semi-rigid joints.
6. The joint of a steel pipe column and a steel beam connected by adopting a cast steel T-shaped piece according to claim 1, wherein the steel pipe column and the H-shaped steel beam are both Q235 steel, and the elastic modulus average value is 206000MPa.
7. The joint of a steel pipe column and a steel beam connected by adopting a cast steel T-shaped piece according to claim 1, wherein the joint has better anti-seismic performance than a rigid joint, and the joint reduces the displacement response of the structure under the action of strong earthquake through energy consumption capability and meets the anti-seismic requirement of a steel frame structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311829587.2A CN117758881A (en) | 2023-12-27 | 2023-12-27 | Node for connecting steel pipe column and steel beam by adopting cast steel T-shaped piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311829587.2A CN117758881A (en) | 2023-12-27 | 2023-12-27 | Node for connecting steel pipe column and steel beam by adopting cast steel T-shaped piece |
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| Publication Number | Publication Date |
|---|---|
| CN117758881A true CN117758881A (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311829587.2A Pending CN117758881A (en) | 2023-12-27 | 2023-12-27 | Node for connecting steel pipe column and steel beam by adopting cast steel T-shaped piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117758881A (en) |
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2023
- 2023-12-27 CN CN202311829587.2A patent/CN117758881A/en active Pending
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