CN103758216B - Shear-resistant connection joint of cast-in-place composite space truss - Google Patents
Shear-resistant connection joint of cast-in-place composite space truss Download PDFInfo
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- CN103758216B CN103758216B CN201410024528.2A CN201410024528A CN103758216B CN 103758216 B CN103758216 B CN 103758216B CN 201410024528 A CN201410024528 A CN 201410024528A CN 103758216 B CN103758216 B CN 103758216B
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Abstract
The invention relates to a shear-resistant connection joint of a cast-in-place composite space truss. The shear-resistant connection joint comprises a joint hollow hemisphere, a joint cover plate, a long steel channel, two short steel channels and hole-penetrating steel bars. The joint hollow hemisphere is located at the junction of a steel truss and a cast-in-place concrete plate, the long steel channel is welded on the top face of the joint cover plate, the two short steel channels are arranged on two sides of the long steel channel respectively, the long steel channel and the two short steel channels are disposed in a cross manner, a plurality of round holes are formed in a web of the long steel channel, a plurality of round holes are formed in a web of each short steel channel, and the steel bars are penetratingly arranged in the round holes. The shear-resistant connection joint is simple in structure, convenient to construct and applicable to shear connection of cast-in-place composite structures; pressure-bearing contact surface between the perforated steel channels and concrete is large, the steel channels, rod-shaped concrete tenons formed by perforation on the steel channels and the hole-penetrating steel bars can jointly bear horizontal shear action and uplift action in two directions between the upper and lower portions of cast-in-place composite steel and concrete, and the shear-resistant connection joint is high in connection stiffness, high in shear capacity and good in ductility and anti-fatigue performance.
Description
Technical field
The invention belongs to civil construction field, particularly, relate to a kind of shear connections node of cast-in-place composite space truss.
Background technology
The large-span space structure that composite space truss is made up of reinforced concrete floor, Elements of Space Grid Truss.Traditional composite space truss generally adopts precast rc slab, and it to be connected to come Transfer of Shear with fillet weld and node connector by the steel plate that is embedded in precast rc slab bight, and force transfer structure is complicated, becomes the weak link of composite space truss.In recent years, along with the development of premixed concrete industry, cast-in-place concrete structure uses in a large number.Cast-in-situ reinforced concrete slab is compared with precast rc slab, and have the features such as structural integrity is good, rigidity is large, it can form novel composite space truss-cast-in-situ concrete composite space truss with Elements of Space Grid Truss.Cast-in-place composite space truss cannot carry out shearing resistance by pre-embedded steel slab in concrete, need arrange shear connector on grid node.
In the combining structures such as compound beam, the normal peg that adopts is as shear connector, but the shear connector of composite space truss is in some distribution, and the rigidity of peg and intensity less, be difficult to the requirement of the shear Design meeting composite space truss.
Along with promoting the use of of cast-in-place composite grid structure, as the basis of the upper and lower two parts work of composite space truss, adopt the most important of the shear connector change that a kind of rigidity is large, intensity is high, ductility is good.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of shear connections node of cast-in-place composite space truss, this shear connections connection stiffness is large, intensity is high, ductility good.
For achieving the above object, the present invention is by the following technical solutions:
A shear connections node for cast-in-place composite space truss, comprising: node hollow hemisphere, node cover plate, elongated slot steel, short channel-section steel and perforation reinforcing bar; Node hollow hemisphere is positioned at Elements of Space Grid Truss and cast in place concrete plate junction, short channel-section steel has two sections, elongated slot steel is welded on the end face of node cover plate, two short channel-section steels are arranged at the both sides of elongated slot steel respectively, elongated slot steel, two short channel-section steels are that right-angled intersection is arranged, multiple circular hole offered by elongated slot steel on web, and multiple circular hole offered by short channel-section steel on web, wears perforation reinforcing bar in circular hole.
Relative to prior art, the present invention has following advantage:
1, joint structure of the present invention is simple, and easy construction, is applicable to the shear connections of cast-in-place combining structure.
2, in shear connections node of the present invention, between opening slot Steel concrete, pressure-bearing contact surface is large, can and channel-section steel on the bar-shaped tenon of concrete that formed by perforate and reinforcing bar of boring a hole jointly to bear between the upper and lower two parts of cast-in-place composite space truss Steel concrete in the horizontal shear effect of both direction and start effect, have that coupling stiffness is large, shear-carrying capacity is high, ductility and a good feature of anti-fatigue performance.
Accompanying drawing explanation
Fig. 1 is the shear connections node structure schematic diagram of cast-in-place composite space truss of the present invention;
Fig. 2 is A-A generalized section in Fig. 1;
In figure: 1, node hollow hemisphere, 2, node cover plate, 3, elongated slot steel, 4, short channel-section steel, 5, circular hole, 6, perforation reinforcing bar, 7, fillet weld.
Detailed description of the invention
As shown in Figure 1, the shear connections node of cast-in-place composite space truss, comprising: node hollow hemisphere 1, node cover plate 2, elongated slot steel 3, short channel-section steel 4 and perforation reinforcing bar 6; Short channel-section steel 4 has two sections;
Node hollow hemisphere 1 is a hollow hemisphere, is positioned at Elements of Space Grid Truss and cast in place concrete plate junction; Node cover plate 2 is circular steel plate, and the diameter of node cover plate 2 is larger than the diameter of node hollow hemisphere 1, and node cover plate 2 is welded on the open end of node hollow hemisphere 1, and the bottom center of node cover plate 2 overlaps with the centre of sphere of node hollow hemisphere 1.
Elongated slot steel 3 is welded on the end face of node cover plate 2, its base sides center of elongated slot steel 3 and node cover plate 2 end face center superposition; Two short channel-section steels 4 are arranged at the both sides of elongated slot steel 3 respectively, and the short channel-section steel 4 of elongated slot steel 3, two is arranged in right-angled intersection, and the position of elongated slot steel 3, short channel-section steel 4 contact adopts and is welded to connect; Dead in line, the opening direction of two short channel-section steels 4 are identical, and two short channel-section steel 4 its base sides lines are by the center of node cover plate 2 end face; The opening direction of described elongated slot steel 3, two sections of short channel-section steels 4 is identical with the horizontal shear direction of composite space truss both direction respectively; Described elongated slot steel 3 is welded to connect by fillet weld 7 with node cover plate 2 at acropodium, the limb back of the body, and two short channel-section steels 4 are welded to connect by fillet weld 7 with node cover plate 2 at acropodium, the limb back of the body.
Multiple circular hole 5 offered by elongated slot steel 3 on web, and multiple circular hole 5 offered by short channel-section steel 4 on web, wears perforation reinforcing bar 6 in circular hole 5; Described perforation reinforcing bar 6 is the reinforcing bar in concrete floor.
Middle slot Steel concrete pressure-bearing contact of the present invention, can and channel-section steel on the bar-shaped tenon of concrete that formed by perforate and reinforcing bar of boring a hole jointly to bear between the upper and lower two parts of cast-in-place composite space truss Steel concrete in the horizontal shear effect of both direction and start effect, node coupling stiffness is large, shear-carrying capacity is high, ductility and anti-fatigue performance good, be a kind of shear connections node of reliable cast-in-place composite space truss.
Along with a large amount of employings of China's large-span space structure and cast-in-place structural, more and more extensive in cast-in-place composite space truss, adopt reliable shear connections node, will become the important point in engineering, shear connections node of the present invention, application prospect is very extensive.
Claims (1)
1. a shear connections node for cast-in-place composite space truss, comprising: node hollow hemisphere, node cover plate, elongated slot steel, short channel-section steel and perforation reinforcing bar; It is characterized in that: node hollow hemisphere is positioned at Elements of Space Grid Truss and cast in place concrete plate junction, short channel-section steel has two sections, elongated slot steel is welded on the end face of node cover plate, two short channel-section steels are arranged at the both sides of elongated slot steel respectively, elongated slot steel, two short channel-section steels are that right-angled intersection is arranged, multiple circular hole offered by elongated slot steel on web, and multiple circular hole offered by short channel-section steel on web, wears perforation reinforcing bar in circular hole;
Node hollow hemisphere is hollow hemisphere, node cover plate is circular steel plate, the diameter of node cover plate is larger than the diameter of node hollow hemisphere, and node bridge welding is connected on the open end of node hollow hemisphere, and the bottom center of node cover plate overlaps with the centre of sphere of node hollow hemisphere;
Its base sides center of elongated slot steel and node cover plate end face center superposition; The position of elongated slot steel, short channel-section steel contact adopts and is welded to connect; Dead in line, the opening direction of two short channel-section steels are identical, and two short channel-section steel its base sides lines are by the center of node cover plate end face; Described elongated slot steel is connected by fillet weld seam with node cover plate at acropodium, the limb back of the body, and two short channel-section steels are connected by fillet weld seam with node cover plate at acropodium, the limb back of the body;
The opening direction of described elongated slot steel, two sections of short channel-section steels is identical with the horizontal shear direction of composite space truss both direction respectively;
Described perforation reinforcing bar is the reinforcing bar in concrete floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024528.2A CN103758216B (en) | 2014-01-20 | 2014-01-20 | Shear-resistant connection joint of cast-in-place composite space truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024528.2A CN103758216B (en) | 2014-01-20 | 2014-01-20 | Shear-resistant connection joint of cast-in-place composite space truss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103758216A CN103758216A (en) | 2014-04-30 |
| CN103758216B true CN103758216B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410024528.2A Expired - Fee Related CN103758216B (en) | 2014-01-20 | 2014-01-20 | Shear-resistant connection joint of cast-in-place composite space truss |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108360366B (en) * | 2018-01-23 | 2024-02-23 | 安徽省交通控股集团有限公司 | Prefabricated pier and plate cross shear support connection structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3346741A1 (en) * | 1983-12-23 | 1985-07-04 | Udo Dr.-Ing. 3301 Schwülper Peil | Connecting element for a tension element, in particular a tension bar, in a wooden construction |
| CN201162298Y (en) * | 2008-03-06 | 2008-12-10 | 万水 | Flange type anti-shearing connector |
| CN201433469Y (en) * | 2009-06-29 | 2010-03-31 | 中铁第一勘察设计院集团有限公司 | Steel structure spherical cap node |
| CN102002981A (en) * | 2010-12-02 | 2011-04-06 | 北京建工集团有限责任公司 | Concrete nodes cast in steel hemisphere and construction method thereof |
| CN102296734A (en) * | 2011-07-21 | 2011-12-28 | 深圳市建筑设计研究总院有限公司 | Combined net support |
| CN102720293A (en) * | 2012-06-20 | 2012-10-10 | 山西省第三建筑工程公司 | Inverted-triangular steel tube intersected spatial truss and assembly method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105966561A (en) * | 2006-03-12 | 2016-09-28 | 严建军 | Ship body structure |
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2014
- 2014-01-20 CN CN201410024528.2A patent/CN103758216B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3346741A1 (en) * | 1983-12-23 | 1985-07-04 | Udo Dr.-Ing. 3301 Schwülper Peil | Connecting element for a tension element, in particular a tension bar, in a wooden construction |
| CN201162298Y (en) * | 2008-03-06 | 2008-12-10 | 万水 | Flange type anti-shearing connector |
| CN201433469Y (en) * | 2009-06-29 | 2010-03-31 | 中铁第一勘察设计院集团有限公司 | Steel structure spherical cap node |
| CN102002981A (en) * | 2010-12-02 | 2011-04-06 | 北京建工集团有限责任公司 | Concrete nodes cast in steel hemisphere and construction method thereof |
| CN102296734A (en) * | 2011-07-21 | 2011-12-28 | 深圳市建筑设计研究总院有限公司 | Combined net support |
| CN102720293A (en) * | 2012-06-20 | 2012-10-10 | 山西省第三建筑工程公司 | Inverted-triangular steel tube intersected spatial truss and assembly method thereof |
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| CN103758216A (en) | 2014-04-30 |
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