CN214531602U - Arch-shaped anti-seismic connecting joint of prefabricated reinforced concrete stair - Google Patents
Arch-shaped anti-seismic connecting joint of prefabricated reinforced concrete stair Download PDFInfo
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- CN214531602U CN214531602U CN202120613400.5U CN202120613400U CN214531602U CN 214531602 U CN214531602 U CN 214531602U CN 202120613400 U CN202120613400 U CN 202120613400U CN 214531602 U CN214531602 U CN 214531602U
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Abstract
The utility model relates to an arch antidetonation connected node of prefabricated reinforced concrete stair. It has solved the current poor scheduling problem of prefabricated staircase antidetonation effect. Including having the cast-in-place terraced roof beam of choosing the ear, prefabricated stair and stair connecting portion, the terminal surface has the arch recess under the stair connecting portion, it has the arch convex surface to choose the ear up end, be equipped with two arch high strength steel boards between arch convex surface and the arch recess, the one side that two arch high strength steel boards contacted is smooth surface and another side and is the rough surface, arch high strength steel board links to each other with stair connecting portion or choosing the ear through anchor connection structure respectively, stair connecting portion and cast-in-place terraced roof beam and/or choose to be equipped with shock attenuation block structure between the ear. Has the advantages that: 1. the purpose that the prefabricated staircase can slide under the action of horizontal force such as earthquake and the like to avoid the staircase from absorbing excessive energy to damage the staircase is achieved; 2. the stair can be restored to the original position after sliding, and good anti-seismic and self-resetting performances are achieved.
Description
Technical Field
The utility model belongs to the technical field of building structure, especially, relate to an arch antidetonation connected node of prefabricated reinforced concrete stair.
Background
At present, the assembly type concrete building is developed very rapidly in China, the assembly type technology is widely popularized and applied in various places, various concrete components are prefabricated in factories and transported to a field for installation. The prefabricated staircase is a prefabricated component with more applications in the fabricated building, and is generally prefabricated by a stair section plate, and a stair beam and a cantilever lug are cast in situ. At present, joints of prefabricated bench plates and a bench beam are hinged supports and do not have a sliding function. The stairway is used as vertical traffic of a building and is an important escape channel under the condition of danger, and particularly under the condition of an earthquake, the stairway has a very important function. And the earthquake action is horizontal power usually, when the stair is subjected to the horizontal earthquake action, if the stair can not slide, the stair can absorb earthquake energy to damage the stair, and huge hidden danger is easily brought to the structural safety.
In order to solve the problems of the prior art, people have long searched for and put forward various solutions. For example, chinese patent document discloses an assembled prefabricated earthquake-resistant staircase structure [ application No.: 202020659998.7], comprising: the prefabricated bench comprises a prefabricated bench body, wherein the upper end and the lower end of the prefabricated bench body are respectively provided with a vertical limiting jack; the prefabricated stair section comprises two stair platform beams which are arranged in the same direction, wherein mounting grooves are oppositely formed in the two stair platform beams, and the upper ends and the lower ends of the prefabricated stair section bodies are accommodated in the mounting grooves of the two stair platform beams in a one-to-one correspondence manner; the limiting insertion ribs are arranged in the mounting grooves and correspond to the limiting insertion holes, the limiting insertion ribs are inserted into the limiting insertion holes, and a buffer gap is formed between each limiting insertion rib and each limiting insertion hole; and the anti-sticking interlayer is arranged between the lower end of the prefabricated bench body and the mounting groove.
Above-mentioned scheme adopts prefabricated staircase assembly methods to have alleviated cast-in-place stair anti-seismic performance poor problem to a certain extent, but still exists in this scheme: when the stair is subjected to the action of a horizontal earthquake during an earthquake, the stair cannot horizontally slide, and the stair structure is easy to damage.
Disclosure of Invention
The utility model aims at the above-mentioned problem, provide an arch antidetonation connected node of prefabricated reinforced concrete stair.
In order to achieve the above purpose, the utility model adopts the following technical proposal: the arched anti-seismic connecting joint of the prefabricated reinforced concrete stair comprises a cast-in-situ ladder beam with horizontal outward extending lugs, one side of the cast-in-situ ladder beam is provided with a prefabricated staircase which is obliquely arranged, one end of the prefabricated staircase is provided with a staircase connecting part which corresponds to the lifting lug and is horizontally arranged, it is characterized in that the lower end surface of the stair connecting part is provided with an arched groove, the upper end surface of the projecting lug is provided with an arched convex surface matched with the arched groove, two arch high-strength steel plates which are mutually overlapped are arranged between the arch convex surface and the arch groove, one surface of the two arch high-strength steel plates which is contacted with each other is a smooth surface, the other surfaces of the two arch high-strength steel plates are rough surfaces which are contacted with the arch convex surface or the arch groove, the arched high-strength steel plates are respectively connected with the stair connecting parts or the projecting lugs through the anchoring connecting structures, and a damping plugging structure is arranged between the stair connecting part and the cast-in-situ ladder beam and/or the cantilever lug.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, the radian of the arch-shaped convex surface is equal to that of the arch-shaped groove and the radian of the arch-shaped high-strength steel plate, and the ratio of the arch-shaped height of the arch-shaped convex surface to that of the arch-shaped groove to the arch span is 1: 3-5.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, the concave-convex depth of the rough surface of the arch-shaped high-strength steel plate is 3-8 mm.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, the anchoring connecting structure comprises a plurality of anchoring reinforcing steel bars which are sequentially arranged in the stair connecting part and the cantilever lugs, and the anchoring reinforcing steel bars are all connected with the arch-shaped high-strength steel plates in a welding mode.
In the arch-shaped anti-seismic connecting node of the prefabricated reinforced concrete stair, three anchoring steel bars are arranged in each stair connecting part or each lifting lug at equal intervals in sequence, and the interval between every two adjacent anchoring steel bars is 100-fold-equal-distance 300 mm.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, one end of the cast-in-place ladder beam is provided with a ladder beam end surface which is positioned on one side of the upper end of the cantilever lug and corresponds to one end surface of the stair connecting part, a vertically arranged first gap is formed between the ladder beam end surface and one end surface of the stair connecting part, and a horizontally arranged second gap is formed between the stair connecting part and the cantilever lug and positioned on two sides of the arch-shaped high-strength steel plate.
In the arch-shaped earthquake-resistant connecting joint of the prefabricated reinforced concrete stair, the damping plugging structure comprises a damping component arranged in the first gap and a plugging component arranged in the second gap.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, the shock absorption assembly comprises an elastic damping layer or a shock insulation pad arranged in the first gap, the shock insulation pad is provided with three layers, the middle layer is a steel plate, and the two sides of the shock insulation pad are respectively provided with an anti-corrosion rubber pad which is in contact with the end face of the ladder beam or the end face of the stair connecting part.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, the plugging component comprises foamed polyethylene rods which are arranged in the second gap and are respectively positioned on two sides of the arch-shaped high-strength steel plate.
In the arch-shaped anti-seismic connecting joint of the prefabricated reinforced concrete stair, the upper end surfaces of the cantilever lugs are far away from one side edge of the cast-in-situ stair beam and the lower end of the prefabricated stair are plugged by building weather-resistant sealant positioned on one side of the foamed polyethylene rod.
Compared with the prior art, this arch antidetonation connected node of prefabricated reinforced concrete stair's advantage lies in:
1. the purpose that the prefabricated staircase can slide under the action of horizontal force such as earthquake and the like to avoid the staircase from absorbing excessive energy to damage the staircase is achieved;
2. the contact surface of the stair and the lifting lug is arched, so that the stair can be restored to the original position after sliding, and good anti-seismic and self-resetting performances are achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of a partial structure of the present invention.
Fig. 3 is a sectional view of a partial structure of the seismic isolation pad of the present invention.
In the drawing, a cast-in-place ladder beam 1, a cantilever lug 11, a ladder beam end face 12, a first gap 13, a second gap 14, a prefabricated staircase 2, a staircase connecting part 21, an arch groove 3, an arch convex surface 4, an arch high-strength steel plate 5, an anchoring connecting structure 6, an anchoring reinforcing steel bar 61, a shock absorption plugging structure 7, a shock insulation pad 71, a steel plate 711, a corrosion-resistant rubber pad 712, a foamed polyethylene rod 72 and a building weather-resistant sealant 73.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the arch-shaped earthquake-proof connection node of the prefabricated reinforced concrete stair comprises a cast-in-situ stair beam 1 with a horizontal outward extending lug 11, a prefabricated stair 2 obliquely arranged on one side of the cast-in-situ stair beam 1, a stair connection part 21 horizontally arranged corresponding to the lug 11 and arranged at one end of the prefabricated stair 2, an arch-shaped groove 3 arranged on the lower end surface of the stair connection part 21, an arch-shaped convex surface 4 matched with the arch-shaped groove 3 arranged on the upper end surface of the lug 11, and be equipped with two arch high strength steel sheet 5 that superpose the setting each other between arch convex surface 4 and the arch recess 3, the one side that two arch high strength steel sheet 5 contacted is the rough surface with arch convex surface 4 or 3 contacts of arch recess for smooth surface and two arch high strength steel sheet's another side, and arch high strength steel sheet 5 links to each other with stair connecting portion 21 or choose ear 11 through anchor connection structure 6 respectively.
Obviously, in this embodiment, through choosing the upper surface of ear 11 and stair connecting portion 21 lower surface preset arch convex surface 4 and arch recess 3 to pre-buried arch high strength steel sheet 5, under the condition of horizontal effect such as earthquake is received to stair like this, the slip that makes a round trip can take place between two arch high strength steel sheet 5's the smooth surface, under stair dead weight and arch combined action, stair can be in original position remain stable.
Specifically, the arcuate convexities 4 and the arcuate recesses 3 and the arcuate high-strength steel plates 5 have the same arc degree, and the ratio of the arching height of the arcuate convexities 4 and the arcuate recesses 3 to the arch span is preferably 1: 4.
The depth of the roughness of the rough surface of the arched high-strength steel sheet 5 is 3 to 8 mm. And, anchor connection structure 6 here includes a plurality of anchor reinforcing bars 61 that set gradually in stair connecting portion 21 and choose ear 11, and anchor reinforcing bar 61 all links to each other through the welding mode with arch high strength steel plate 5, has three anchor reinforcing bars 61 and anchor reinforcing bar 61 in each stair connecting portion 21 or choosing ear 11 and equidistant setting in proper order, and the preferred 200 millimeters of interval size between two adjacent anchor reinforcing bars 61.
Obviously, when the stair is prefabricated, the bottom of the stair connecting portion 21 at the two ends is provided with the arch-shaped groove 3 in advance and the arch-shaped high-strength steel plate 5 is embedded, the inner surface of the arch-shaped high-strength steel plate 5 is a rough surface and is welded with anchoring steel bars, the connection between the arch-shaped high-strength steel plate 5 and the stair connecting portion 21 is ensured to be stable, the outer surface of the arch-shaped high-strength steel plate 5 is smooth, and relative sliding can be generated after the arch-shaped high-strength steel plate 5 is in contact with the embedded upper end of the lifting lug 11.
Further, a damping and blocking structure 7 is arranged between the stair connecting portion 21 and the cast-in-place stair beam 1 and/or the overhanging lug 11, obviously, one end of the cast-in-place stair beam 1 is provided with a stair beam end face 12 which is positioned on one side of the upper end of the overhanging lug 11 and corresponds to one end face of the stair connecting portion 21, a vertically arranged first gap 13 is arranged between the stair beam end face 12 and one end face of the stair connecting portion 21, and a horizontally arranged second gap 14 which is positioned on two sides of the arched high-strength steel plate 5 is arranged between the stair connecting portion 21 and the overhanging lug 11.
Preferably, the shock-absorbing blocking structure 7 here comprises a shock-absorbing component arranged in the first gap 13 and a blocking component arranged in the second gap 14.
Preferably, the shock absorbing assembly herein includes an elastic damping layer or vibration isolating pad 71 disposed in the first gap 13, as shown in fig. 3, the vibration isolating pad 71 has three layers, a middle layer being a steel plate 711 and two sides being a corrosion-resistant rubber pad 712 contacting with the end surface 12 of the ladder beam or the end surface of the stair connection portion 21, respectively.
Wherein, the plugging component comprises foamed polyethylene rods 72 which are arranged in the second gap 14 and are respectively positioned at two sides of the arched high-strength steel plate 5.
In addition, the upper end surfaces of the cantilever lugs 11 are far away from one side edge of the cast-in-situ ladder beam 1 and the lower end of the prefabricated staircase 2 and are blocked by building weather-resistant sealant 73 positioned on one side of the foamed polyethylene rod 72.
After the stair are installed, an elastic damping layer or a shock insulation pad 71 is filled between the end face 12 of the stair beam and the stair connecting portion 21, the stair and the stair beam are prevented from being collided to cause damage, meanwhile, the gap between the stair connecting portion 21 and the end of the overhanging lug is filled with a foamed polyethylene rod 72 and is sealed by building weather-resistant sealant 73, and the gap is prevented from being seeped to cause corrosion of the arched high-strength steel plate 5.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms of cast-in-place ladder beam 1, outrigger 11, ladder beam end face 12, first gap 13, second gap 14, prefabricated staircase 2, stair connection 21, arched groove 3, arched convex surface 4, arched high-strength steel plate 5, anchoring connection structure 6, anchoring steel bar 61, shock-absorbing blocking structure 7, shock-absorbing pad 71, steel plate 711, corrosion-resistant shock-absorbing rubber pad 712, foamed polyethylene rod 72, building weather-resistant sealant 73, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. An arch-shaped anti-seismic connecting joint of a prefabricated reinforced concrete stair comprises a cast-in-place ladder beam (1) with a cantilever lug (11) extending horizontally outwards, a prefabricated stair (2) arranged obliquely is arranged on one side of the cast-in-place ladder beam (1), a stair connecting part (21) which corresponds to the cantilever lug (11) and is arranged horizontally is arranged at one end of the prefabricated stair (2), the arch-shaped anti-seismic connecting joint is characterized in that an arch-shaped groove (3) is arranged on the lower end face of the stair connecting part (21), an arch-shaped convex face (4) matched with the arch-shaped groove (3) is arranged on the upper end face of the cantilever lug (11), two arch-shaped high-strength steel plates (5) which are arranged in a mutual overlapping mode are arranged between the arch-shaped convex face (4) and the arch-shaped groove (3), one face, which is in contact with the two arch-shaped high-strength steel plates (5), is a smooth face, and the other face of the two arch-shaped high-strength steel plates (5) is a rough face in contact with the arch-shaped convex face (4) or the arch-shaped groove (3), the arch-shaped high-strength steel plate (5) is connected with the stair connecting part (21) or the lifting lug (11) through the anchoring connecting structure (6) respectively, and a damping plugging structure (7) is arranged between the stair connecting part (21) and the cast-in-situ ladder beam (1) and/or the lifting lug (11).
2. The arched earthquake-resistant connection node of the prefabricated reinforced concrete stair as claimed in claim 1, wherein the radian of the arched convex surface (4) and the arched groove (3) and the arched high-strength steel plate (5) are equal, and the ratio of the arched height of the arched convex surface (4) and the arched groove (3) to the arched span is 1 (3-5).
3. The arched earthquake-resistant connection node of the prefabricated reinforced concrete stair according to claim 1, wherein the rugged surface of the arched high-strength steel plate (5) has a rugged depth of 3-8 mm.
4. The arched anti-seismic connecting joint of the prefabricated reinforced concrete stair as claimed in claim 1, 2 or 3, wherein the anchoring connecting structure (6) comprises a plurality of anchoring steel bars (61) which are sequentially arranged in the stair connecting part (21) and the lug (11), and the anchoring steel bars (61) are connected with the arched high-strength steel plate (5) in a welding manner.
5. The arched earthquake-resistant connection node of the prefabricated reinforced concrete stair according to claim 4, wherein each stair connection part (21) or each overhanging lug (11) is provided with three anchoring steel bars (61), the anchoring steel bars (61) are sequentially arranged at equal intervals, and the interval between two adjacent anchoring steel bars (61) is 100-300 mm.
6. The arched anti-seismic connecting joint of the precast reinforced concrete stairway as claimed in claim 1, wherein one end of the cast-in-place ladder beam (1) is provided with a ladder beam end surface (12) which is located on one side of the upper end of the overhanging lug (11) and corresponds to one end surface of the stair connecting part (21), a first gap (13) which is vertically arranged is formed between the ladder beam end surface (12) and one end surface of the stair connecting part (21), and a second gap (14) which is located on two sides of the arched high-strength steel plate (5) and horizontally arranged is formed between the stair connecting part (21) and the overhanging lug (11).
7. Arched seismic connection node of a prefabricated reinforced concrete staircase according to claim 6, characterized in that said shock-absorbing blocking structure (7) comprises a shock-absorbing assembly arranged in a first gap (13) and a blocking assembly arranged in a second gap (14).
8. An arched earthquake-proof connection node of a prefabricated reinforced concrete stair according to claim 7, characterized in that the shock absorption assembly comprises an elastic damping layer or an earthquake-proof pad (71) arranged in the first gap (13), and the earthquake-proof pad (71) has three layers, the middle layer is a steel plate (711), and two sides are respectively a corrosion-resistant rubber pad (712) in contact with the end surface (12) of the stair beam or the end surface of the stair connection part (21).
9. Arched earthquake-resistant connection node of a prefabricated reinforced concrete staircase according to claim 7, characterized in that said blocking assembly comprises foamed polyethylene rods (72) arranged in the second interspace (14) and located on either side of the arched high-strength steel plates (5).
10. The arched earthquake-resistant connection node of the prefabricated reinforced concrete stair according to claim 8, wherein the upper end surface of the cantilever lug (11) is blocked by a building weather-resistant sealant (73) positioned on one side of the foamed polyethylene rod (72) between one side edge far away from the cast-in-situ stair beam (1) and the lower end of the prefabricated stair (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120613400.5U CN214531602U (en) | 2021-03-25 | 2021-03-25 | Arch-shaped anti-seismic connecting joint of prefabricated reinforced concrete stair |
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| CN202120613400.5U CN214531602U (en) | 2021-03-25 | 2021-03-25 | Arch-shaped anti-seismic connecting joint of prefabricated reinforced concrete stair |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814294A (en) * | 2020-12-29 | 2021-05-18 | 北京观唐城投建设有限公司 | Novel tongue-and-groove connecting structure of precast concrete ladder beam and construction process thereof |
| CN114941382A (en) * | 2022-05-31 | 2022-08-26 | 中建八局总承包建设有限公司 | Concrete structure and steel stair waterproof node and construction method thereof |
-
2021
- 2021-03-25 CN CN202120613400.5U patent/CN214531602U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814294A (en) * | 2020-12-29 | 2021-05-18 | 北京观唐城投建设有限公司 | Novel tongue-and-groove connecting structure of precast concrete ladder beam and construction process thereof |
| CN114941382A (en) * | 2022-05-31 | 2022-08-26 | 中建八局总承包建设有限公司 | Concrete structure and steel stair waterproof node and construction method thereof |
| CN114941382B (en) * | 2022-05-31 | 2023-12-08 | 中建八局总承包建设有限公司 | Waterproof node for concrete structure and steel stair and construction method thereof |
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