CN113389266A - Novel mixed strength shear connection node based on pressure-bearing type high-strength bolt - Google Patents
Novel mixed strength shear connection node based on pressure-bearing type high-strength bolt Download PDFInfo
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- CN113389266A CN113389266A CN202110705926.0A CN202110705926A CN113389266A CN 113389266 A CN113389266 A CN 113389266A CN 202110705926 A CN202110705926 A CN 202110705926A CN 113389266 A CN113389266 A CN 113389266A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
- E04B1/08—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
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- Bridges Or Land Bridges (AREA)
- Connection Of Plates (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a novel mixed strength shear-resistant connecting node based on pressure-bearing high-strength bolts, which belongs to the technical field of bridge engineering and comprises a first steel plate with high section tensile strength and a second steel plate with low section tensile strength, wherein the first steel plate and the second steel plate are fixedly connected through n bolts, and the n bolts are sequentially divided into m rows from the end part of the second steel plate close to a connecting end and are arranged, wherein the number of the bolts arranged in the first row is n1, the number of the bolts in the second row is n2, and the like is that the number of the bolts in the m row is nm; the number of bolts arranged in the first row, the second row … … to the m-th row is monotonically decreased in sequence. The invention protects the steel plate to be connected with low section tensile strength reliably, and realizes high-efficiency material utilization rate for the steel plate to be connected with high section tensile strength; under the requirement of the shear resistance of the same node, the high-section tensile strength of the novel node is improved by 33% of the utilization rate of the steel plate to be connected.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a novel mixed strength shear connection node based on pressure-bearing high-strength bolts.
Background
The pressure-bearing high-strength bolt connection is one of the shear-resistant connection forms of steel materials commonly used at present, the ideal shear-resistant connection bearing capacity of the pressure-bearing high-strength bolt connection mainly comes from the pressure bearing of the wall of a steel plate hole and the shearing of a bolt screw, and the form of net section damage is avoided as much as possible, so that the high material utilization rate and the reliable ductility are ensured.
The problem of steel lapping with different section tensile properties due to different section thicknesses, widths or steel types is often caused in engineering. The conventional shear-resistant connecting node of the pressure-bearing type bolt mostly adopts a regular or staggered arrangement mode, the cross section is excessively weakened due to the fact that bolts are excessively arranged on a single cross section of a steel plate to be connected with low-section tensile strength are avoided, the number of the bolts which can be arranged on the single cross section is limited, more bolts which cannot be reasonably arranged on the cross section of the steel plate to be connected with high-section tensile strength are considered, the stronger performance of the bolts is fully utilized, a longer connecting area is always required to be arranged, and the utilization efficiency of steel is low.
Disclosure of Invention
In order to solve the problems, the invention adopts the following technical scheme:
a novel mixed strength shear-resistant connection node based on pressure-bearing high-strength bolts is used for steel plates with different section tensile strengths connected in a lap joint mode, the steel plates with different section tensile strengths comprise a first steel plate with high section tensile strength and a second steel plate with low section tensile strength, the first steel plate and the second steel plate are fixedly connected through n bolts, and the n bolts are sequentially divided into m rows from the end part, close to a connection end, of the second steel plate to be arranged, wherein the number of the bolts arranged in the first row is n1, the number of the bolts in the second row is n2, and the number of the bolts in the mth row is nm by analogy; the number of bolts arranged in the first row, the second row … … to the m-th row is monotonically decreased in sequence.
Further, the bolts arranged on each row are arranged symmetrically on the section where the bolts are arranged, the distance between two adjacent rows is equal to twice the edge distance, and at least the minimum edge end distance and the bolt distance specified in the Chinese steel structure specification are met.
Further, the pressure-bearing high-strength bolt is one of 8.8 grades, 10.9 grades or 12.9 grades.
And further, checking the net section of each row of bolts on the second steel plate to ensure that the net section cannot be damaged.
And further, carrying out net section damage checking calculation on the net section of the row of bolts close to the end part of the connecting end on the first steel plate so as to ensure that the net section damage cannot occur.
The invention has the beneficial effects that:
1) the invention provides an irregular arrangement mode based on the stress characteristics of pressure-bearing type bolt connection, which can reduce the overlapping length, reduce the overlapping area and improve the material utilization rate on the premise of avoiding the damage of the net section of a steel plate to be connected with low section tensile strength, and the novel node can be overlapped by at most 50% under the equal node shearing resistance requirement.
2) The arrangement mode of the irregularly arranged nodes can be adjusted based on the properties of the steel materials with different strengths to be connected, so that the steel plates to be connected with the low-section tensile strength are protected to be reliable, and the high-efficiency material utilization rate of the steel plates to be connected with the high-section tensile strength is realized; under the requirement of the shear resistance of the same node, the high-section tensile strength of the novel node is improved by 33% of the utilization rate of the steel plate to be connected.
3) The invention has simple structure, definite stress and no need of complex process.
Drawings
FIG. 1 is a conceptual diagram of the overall structure of the present invention;
FIG. 2 is an exploded view of the components of the present invention after disassembly;
FIG. 3 is a schematic view of the overall structure of embodiment 2 of the present invention;
FIG. 4 is an exploded view of the components of example 2 of the present invention after detachment;
FIG. 5 is a schematic view of the overall structure of embodiment 3 of the present invention;
FIG. 6 is an exploded view of the components of example 3 of the present invention after disassembly;
FIG. 7 is a schematic view of the overall structure of embodiment 4 of the present invention;
FIG. 8 is an exploded view of the components of example 4 of the present invention after detachment;
wherein, 1, a first steel plate; 2. a second steel plate; 3. and (4) bolts.
Detailed Description
Example 1
A novel mixed strength shear connection node based on pressure-bearing high-strength bolts is used for steel plates with different section tensile strengths connected in a lap joint mode, the steel plates with different section tensile strengths comprise a first steel plate 1 with high section tensile strength and a second steel plate 2 with low section tensile strength, the first steel plate 1 and the second steel plate 2 are fixedly connected through n bolts 3, the n bolts 3 are sequentially divided into m rows from the end part, close to a connection end, of the second steel plate 1 to be arranged, wherein the number of the bolts 3 arranged in the first row is n1, the number of the bolts 3 in the second row is n2, and the number of the bolts 3 in the m rows is nm in sequence; the number of the bolts 3 arranged in the first, second and mth rows … … to m is monotonically decreased in this order, that is, n1> n2 … > nm > 0.
In this embodiment, when the number of bolts is monotonically decreased to 1, the relationship between n and m is: (n1+ nm) × m ═ 2 n.
In the present embodiment, the bolts 3 disposed on each row are arranged in a symmetrical manner on the cross section, the spacing between two adjacent rows is equal to twice the edge distance, and at least meets the minimum edge distance and bolt spacing specification specified in the chinese steel structure specification (steel structure design specification (GB 50017-2003)).
In the embodiment, the bolt is one of 8.8-grade, 10.9-grade or 12.9-grade high-strength bolts.
In this embodiment, the net section of each row of bolts 3 on the second steel plate 2 is checked to ensure that it will not be damaged. The net section damage checking calculation is carried out to the net section of the row of bolts 3 which are positioned on the first steel plate 1 and close to the end part of the connecting end, so that the net section damage can not occur.
Example 2
This implementation provides a novel mixed strength shear connection node based on pressure-bearing type high-strength bolt according to the requirement in embodiment 1, and it includes two different tensile properties steel sheet, first steel sheet 1, second steel sheet 2 and high-strength bolt 3 promptly.
Node example of this embodiment referring to fig. 3, the gusset plate is designed to have a shear resistance of 402.6 kN.
Referring to fig. 3, the node comprises a second steel plate 2 with low section tensile strength, a first steel plate 1 with high section tensile strength and an arrangement example of a bolt 3.
Wherein, the second steel plate 2 with low section tensile strength in the node is a Q235 steel plate with the width of 216mm and the thickness of 10 mm; the first steel plate 1 with high section tensile strength is a Q345 steel plate with the width of 216mm and the thickness of 10 mm;
in the present embodiment, the arrangement example of the bolts 3 in the node is a total of 6 irregularly arranged pressure-bearing high-strength bolts.
Wherein, the diameters d0 of all plate screw holes of the node are 24mm, and the bolts are 8.8-grade M22 bolts. Referring to fig. 3, the node is divided into 3 rows on the second steel plate 2 with low section tensile strength, n1 is the first row, 3 bolts are arranged, n2 is the second row, 2 bolts are arranged, n3 is the third row, 1 bolt is arranged.
Wherein the pitch of the n1 rows of bolts is 3d0, the edge distance is 1.5d0, and the end distance is 2d 0; the spacing between the n2 rows of bolts is 4.5d0, and the edge distance is 2.25d 0; the n3 rows of bolts are centrally arranged.
The pitch of the sections where the nodes n1, n2 and n3 are located is 3d 0.
The node carries out net section checking calculation on the sections of n1, n2 and n3 of the second steel plate 2 with low section tensile strength and the section of n1 of the first steel plate 1 with high section tensile strength, and the net section damage does not occur.
Compare traditional rule or staggered arrangement, to the second steel sheet 2 of low section tensile strength that this example provided and high section tensile strength's first steel sheet 1, owing to need avoid low section tensile strength's 2 net sections of second steel sheet to break, when providing equal bearing capacity 402.6kN, arrange 3 quantity more than or equal to 2 of bolt and can lead to the net section to break on the cross-section, bolt 3 can only arrange 1 row 1, totally 6 rows. The node of the embodiment is reduced by 50% of the lap area on the basis of providing the same bearing capacity through an irregular bearing type bolt arrangement mode. The maximum main tensile stress in the stronger plate is improved by 33.3% compared with the traditional design, the high-strength characteristic of the stronger overlapped plate is further coordinated and improved, and the utilization efficiency of materials is obviously improved.
Example 3
The main structure of this embodiment is the same as embodiment 2. Referring to fig. 5 and 6, the difference is that the first steel plate 1 with high section tensile strength in the node is a Q235 steel plate with the width of 216mm and the thickness of 20 mm.
Example 4
The main structure of this embodiment is the same as embodiment 2. Referring to fig. 6 and 7, the difference is that the first steel plate 1 with high section tensile strength in the node is a Q235 steel plate with the width of 400mm and the thickness of 10 mm.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. A novel mixed strength shear-resistant connection node based on pressure-bearing high-strength bolts is used for steel plates with different section tensile strengths connected in a lap joint mode, and comprises a first steel plate with high section tensile strength and a second steel plate with low section tensile strength, and is characterized in that the first steel plate and the second steel plate are fixedly connected through n bolts, and the n bolts are sequentially divided into m rows from the end part, close to a connection end, of the second steel plate to be arranged, wherein the number of the first row of bolts is n1, the number of the second row of bolts is n2, and so on until the number of the m rows of bolts is nm; the number of bolts arranged in the first row, the second row … … to the m-th row is monotonically decreased in sequence.
2. The novel mixed strength shear connection node based on the pressure-bearing high-strength bolt as claimed in claim 1, wherein the bolts arranged on each row are arranged symmetrically on the cross section where the bolts are located, the distance between two adjacent rows is equal to twice the edge distance, and at least the minimum edge end distance and bolt distance requirements specified in the Chinese steel structure specification are met.
3. The novel hybrid-strength shear connection node based on a pressure-bearing high-strength bolt according to claim 1, wherein the pressure-bearing high-strength bolt is one of 8.8-grade, 10.9-grade or 12.9-grade.
4. The novel mixed-strength shear connection node based on pressure-bearing high-strength bolts as claimed in claim 1, wherein the net section of each row of bolts on the second steel plate is checked to ensure that the net section is not damaged.
5. The novel mixed strength shear connection node based on pressure-bearing high-strength bolts as claimed in claim 4, wherein the net cross-section damage checking calculation is performed on the net cross-section of the row of bolts on the first steel plate close to the end of the connecting end to ensure that the net cross-section damage does not occur.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110705926.0A CN113389266B (en) | 2021-06-24 | 2021-06-24 | Mixed strength shear connection node based on pressure-bearing type high-strength bolt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110705926.0A CN113389266B (en) | 2021-06-24 | 2021-06-24 | Mixed strength shear connection node based on pressure-bearing type high-strength bolt |
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| CN113389266A true CN113389266A (en) | 2021-09-14 |
| CN113389266B CN113389266B (en) | 2022-05-17 |
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| CN202110705926.0A Active CN113389266B (en) | 2021-06-24 | 2021-06-24 | Mixed strength shear connection node based on pressure-bearing type high-strength bolt |
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| CN207776236U (en) * | 2017-12-20 | 2018-08-28 | 衡水益通管业股份有限公司 | Corrugated board structures are connected in a kind of |
| CN108894359A (en) * | 2018-05-28 | 2018-11-27 | 昆明理工大学 | A kind of shear wall structure of friction energy-dissipating |
| CN208375132U (en) * | 2018-07-04 | 2019-01-15 | 长春市佳诺工艺装备有限公司 | Detecting tool turnover mechanism |
| CN109281396A (en) * | 2018-10-16 | 2019-01-29 | 华南理工大学 | A kind of bean column node for assembly concrete frame structure |
| CN209309007U (en) * | 2018-11-27 | 2019-08-27 | 上海万泽精密铸造有限公司 | Detachable impeller based on modularized design |
| CN111156036A (en) * | 2020-01-08 | 2020-05-15 | 成都天佑智隧科技有限公司 | Novel plate anchor structure |
| CN211780893U (en) * | 2020-03-16 | 2020-10-27 | 深圳市时代华影科技股份有限公司 | LED box gallows connection structure |
-
2021
- 2021-06-24 CN CN202110705926.0A patent/CN113389266B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088744A (en) * | 2006-10-03 | 2008-04-17 | Nitto Mokuzai Sangyo Kk | Member joining structure of wooden building |
| CN204831771U (en) * | 2015-08-11 | 2015-12-02 | 中国航空工业集团公司西安飞机设计研究所 | Nail carries echelonment board overlap joint testpieces of distribution research |
| CN207776236U (en) * | 2017-12-20 | 2018-08-28 | 衡水益通管业股份有限公司 | Corrugated board structures are connected in a kind of |
| CN108894359A (en) * | 2018-05-28 | 2018-11-27 | 昆明理工大学 | A kind of shear wall structure of friction energy-dissipating |
| CN208375132U (en) * | 2018-07-04 | 2019-01-15 | 长春市佳诺工艺装备有限公司 | Detecting tool turnover mechanism |
| CN109281396A (en) * | 2018-10-16 | 2019-01-29 | 华南理工大学 | A kind of bean column node for assembly concrete frame structure |
| CN209309007U (en) * | 2018-11-27 | 2019-08-27 | 上海万泽精密铸造有限公司 | Detachable impeller based on modularized design |
| CN111156036A (en) * | 2020-01-08 | 2020-05-15 | 成都天佑智隧科技有限公司 | Novel plate anchor structure |
| CN211780893U (en) * | 2020-03-16 | 2020-10-27 | 深圳市时代华影科技股份有限公司 | LED box gallows connection structure |
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| CN113389266B (en) | 2022-05-17 |
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