Connecting joint structure of steel stair beam and prefabricated stair
By designing the sliding connection node structure of steel ladder beams and prefabricated stairs, the problem of rigid collision of prefabricated concrete stairs in steel structure buildings is solved, and the structural flexible connection and stability under strong loads are achieved.
Patent Information
- Application Number
- CN202420646686.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In steel structure buildings, the connection nodes between precast concrete stairs and steel structures are prone to rigid collisions, especially under large loads such as earthquakes, there is a lack of flexible connection design solutions.
A connection node structure between steel ladder beams and prefabricated stairs is designed. By fixedly connecting the top of the prefabricated stairs with the first steel ladder beam, the bottom of the prefabricated stairs is slidly connected to the second steel ladder beam, ensuring that under the action of strong loads, the bottom of the prefabricated stairs can produce sliding displacement and avoid rigid collision with the floor bearing plate.
It effectively avoids rigid collision between prefabricated stairs and floor bearing plates, improves the flexible connection performance of the structure, and ensures the stability and safety of the structure under strong loads.
Smart Images
Figure CN222782205U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a connection node structure of a steel ladder beam and a prefabricated staircase. Background Art
[0002] Steel structures are constructed faster than traditional concrete structures. Stairs are used as vertical traffic passages, and traditional cast-in-place concrete stairs are constructed slowly, which restricts the construction progress of steel structures. The use of precast stairs can solve the problem of matching the construction speeds between the two. However, the steel structure of the building is very flexible, and the precast concrete stairs are very rigid. The two are prone to rigid collision under large loads such as earthquakes. The existing technology lacks a flexible connection design solution for precast concrete stairs in steel structure buildings. Utility Model Content
[0003] In view of this, the utility model provides a connection node structure of a steel ladder beam and a prefabricated staircase to solve the problem of rigid collision in the connection node between the prefabricated staircase and the steel structure.
[0004] The utility model provides a connection node structure of a steel ladder beam and a prefabricated staircase, comprising: a first floor decking plate; a second floor decking plate, which is spaced apart from the first floor decking plate in the height direction; a prefabricated staircase, wherein the top of the prefabricated staircase is arranged correspondingly to the first floor decking plate, and the bottom of the prefabricated staircase is arranged correspondingly to the second floor decking plate; a first steel ladder beam, which connects the first floor decking plate and the top of the prefabricated staircase; and a second steel ladder beam, which connects the second floor decking plate and is slidably connected to the bottom of the prefabricated staircase.
[0005] Beneficial effect: By fixedly connecting the top of the prefabricated stairs with the first steel ladder beam and slidingly connecting the bottom of the prefabricated stairs with the second steel ladder beam, when the prefabricated stairs encounter strong loads such as earthquakes, the bottom of the prefabricated stairs will produce a certain sliding displacement, avoiding rigid collision with the second floor decking plate.
[0006] In an optional embodiment, the first steel ladder beam includes a first plate and a second plate that are relatively spaced apart, and the first steel ladder beam also includes a third plate that connects the first plate and the second plate; and / or, the second steel ladder beam includes a fourth plate and a fifth plate that are relatively spaced apart, and the second steel ladder beam also includes a sixth plate that connects the fourth plate and the fifth plate.
[0007] Beneficial effect: By setting the first steel ladder beam and the second steel ladder beam as an H-shaped steel structure, it is beneficial to improve the bearing capacity of the steel ladder beam.
[0008] In an optional embodiment, anchor rods are provided on the first plate body, grouting holes are opened on the prefabricated staircase, and the anchor rods are inserted and arranged corresponding to the grouting holes.
[0009] Beneficial effect: By setting the anchor rods corresponding to the grouting holes of the prefabricated stairs, it is beneficial to the installation positioning of the prefabricated stairs and facilitates the installation of the prefabricated stairs.
[0010] In an optional implementation, the anchor rod is connected to the first plate body by welding.
[0011] Beneficial effect: By welding the anchor rod to the first plate body, the connection performance between the anchor rod and the first plate body is improved, making the connection and fixation of the anchor rod more stable.
[0012] In an optional embodiment, the first steel ladder beam is further provided with a first reinforcing rib, which is connected between the first plate body and the second plate body and connected to the third plate body; and / or, the second steel ladder beam is further provided with a second reinforcing rib, which is connected between the fourth plate body and the fifth plate body and connected to the sixth plate body.
[0013] Beneficial effects: By setting a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the bearing capacity of the first steel ladder beam and the second steel ladder beam is further improved, the service life is extended, the supporting capacity of the prefabricated stairs is improved, the stability of the overall structure is improved, and the safety of the use of the prefabricated stairs is ensured.
[0014] In an optional implementation, the width of the first plate body is greater than the width of the second plate body; and / or the width of the fourth plate body is greater than the width of the fifth plate body.
[0015] Beneficial effect: By widening the width of the first plate and the fourth plate, the contact area between the first plate and the fourth plate and the prefabricated staircase is increased, thereby further improving the supporting performance of the prefabricated staircase and ensuring the stability of the prefabricated staircase.
[0016] In an optional embodiment, the first steel ladder beam is covered with a fireproof layer, and the fireproof layer is arranged corresponding to the lower surface of the first plate body, the second plate body and the third plate body; and / or, the second steel ladder beam is covered with a fireproof layer, and the fireproof layer is arranged corresponding to the lower surface of the fourth plate body, the fifth plate body and the sixth plate body.
[0017] Beneficial effect: By setting up a fireproof layer, it can resist high temperature in the event of a fire, protect the steel ladder beam structure from deformation and collapse within a certain period of time, and extend the time for personnel escape and fire rescue.
[0018] In an optional embodiment, the connection node structure between the steel ladder beam and the prefabricated staircase further includes an isolation plate, which is disposed on the second steel ladder beam and extends vertically upward along the second steel ladder beam, and the isolation plate isolates the second floor deck from the prefabricated staircase.
[0019] Beneficial effect: By setting an isolation plate between the second floor deck and the prefabricated staircase, the prefabricated staircase will not have a rigid collision with the second floor deck during an earthquake, thereby increasing the service life of the prefabricated staircase and ensuring that the structure is stable and will not collapse when people escape.
[0020] In an optional embodiment, a leveling layer is provided on both the first steel ladder beam and the second steel ladder beam, the leveling layer corresponding to the second steel ladder beam is covered with a film, and the bottom of the prefabricated staircase is slidably provided on the film.
[0021] Beneficial effect: The sliding connection between the prefabricated staircase and the second steel ladder beam is achieved through the film, which has a simple structure and high flexibility.
[0022] In an optional embodiment, the fourth plate body and the prefabricated staircase are filled with sealant at edge positions of the leveling layer corresponding to the edge positions away from the isolation board.
[0023] Beneficial effect: By filling the sealant in the side seam between the second steel ladder beam and the prefabricated stairs, it is prevented that the film slides off, causing rigid friction of the prefabricated stairs, making the staircase structure vulnerable to damage, and affecting the safety of the prefabricated stairs. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 It is a schematic diagram of the connection structure of the first floor deck, the first steel ladder beam and the top of the prefabricated staircase of the connection node structure of the steel ladder beam and the prefabricated staircase in an embodiment of the utility model;
[0026] Figure 2 It is a schematic diagram of the connection structure of the second floor deck, the second steel ladder beam and the bottom of the prefabricated staircase of the connection node structure of the steel ladder beam and the prefabricated staircase in an embodiment of the utility model;
[0027] Figure 3 is a structural schematic diagram of the first steel ladder beam;
[0028] Figure 4 This is a schematic diagram of the structure of the second steel ladder beam.
[0029] Description of reference numerals:
[0030] 1. Prefabricated stairs; 101. Grouting holes; 2. First steel ladder beam; 201. First plate; 2011. Anchor rod; 202. Second plate; 203. Third plate; 204. First reinforcing rib; 3. First floor deck; 4. Second steel ladder beam; 401. Fourth plate; 402. Fifth plate; 403. Sixth plate; 404. Second reinforcing rib; 5. Second floor deck; 6. Fireproof layer; 7. Isolation board; 8. Leveling layer; 9. Sealant. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0032] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.
[0033] According to the embodiments of the present utility model, Figure 1 and Figure 2 As shown, a connection node structure of a steel ladder beam and a prefabricated staircase is provided, comprising: a first floor deck 3, a second floor deck 5, a prefabricated staircase 1, a first steel ladder beam 2, and a second steel ladder beam 4. The second floor deck 5 is arranged spaced apart from the first floor deck 3 in the height direction. The top of the prefabricated staircase 1 is arranged corresponding to the first floor deck 3, and the bottom of the prefabricated staircase 1 is arranged corresponding to the second floor deck 5. The first steel ladder beam 2 connects the first floor deck 3 and the top of the prefabricated staircase 1. The second steel ladder beam 4 connects the second floor deck 5 and is slidably connected to the bottom of the prefabricated staircase 1.
[0034] By fixedly connecting the top of the prefabricated staircase 1 with the first steel ladder beam 2 and slidingly connecting the bottom of the prefabricated staircase 1 with the second steel ladder beam 4, when the prefabricated staircase 1 encounters a strong load such as an earthquake, the bottom of the prefabricated staircase 1 will produce a certain sliding displacement to avoid a rigid collision with the second floor decking plate 5.
[0035] It should be noted that the steel ladder columns have been installed in the steel structure building, and the steel ladder beams in the utility model are fixedly connected to the steel ladder columns.
[0036] Specifically, the floor deck is a steel truss plate, and the steel ladder beam is made of steel with strength grade Q335B.
[0037] Specifically, the gap between the first floor deck 3 and the prefabricated staircase 1 is filled with C35 grade CGM grouting material.
[0038] In one embodiment, Figure 3 As shown, the first steel ladder beam 2 includes a first plate 201 and a second plate 202 that are relatively spaced apart, and the first steel ladder beam 2 also includes a third plate 203, and the third plate 203 connects the first plate 201 and the second plate 202. By setting the first steel ladder beam 2 as an H-shaped steel structure, it is beneficial to improve the bearing capacity of the steel ladder beam.
[0039] In one embodiment, Figure 4 As shown, the second steel ladder beam 4 includes a fourth plate 401 and a fifth plate 402 which are relatively spaced apart, and the second steel ladder beam 4 also includes a sixth plate 403, which connects the fourth plate 401 and the fifth plate 402. By setting the second steel ladder beam 4 as an H-shaped steel structure, it is beneficial to improve the bearing capacity of the steel ladder beam.
[0040] In one embodiment, Figure 1 and Figure 3 As shown, an anchor rod 2011 is arranged on the first plate 201, and a grouting hole 101 is opened on the prefabricated staircase 1, and the anchor rod 2011 is inserted and arranged corresponding to the grouting hole 101. By arranging the anchor rod 2011 to correspond to the grouting hole 101 of the prefabricated staircase 1, it is beneficial to the installation and positioning of the prefabricated staircase 1, and it is convenient to install the prefabricated staircase 1.
[0041] Specifically, in this embodiment, the anchor rod 2011 is 17 cm long and is made of HRB400 steel bars.
[0042] Specifically, a plurality of anchor rods 2011 are provided, and the plurality of anchor rods 2011 are arranged at intervals on the first plate body 201 . By providing the plurality of anchor rods 2011 , the connection between the first steel ladder beam 2 and the prefabricated staircase 1 is made more stable.
[0043] Specifically, after the anchor rod 2011 is plugged into the grouting hole 101, C35 grade CGM grouting material is used to fill the top of the prefabricated staircase 1 and the steel ladder beam.
[0044] In one embodiment, the anchor rod 2011 is welded to the first plate 201. By welding the anchor rod 2011 to the first plate 201, the connection performance between the anchor rod 2011 and the first plate 201 is improved, and the connection and fixation of the anchor rod 2011 is more stable.
[0045] In one embodiment, Figure 3As shown, the first steel ladder beam 2 is further provided with a first reinforcing rib 204, and the first reinforcing rib 204 is connected between the first plate body 201 and the second plate body 202 and connected to the third plate body 203. By providing the first reinforcing rib 204, the bearing capacity of the first steel ladder beam 2 is further improved, the service life is extended, the supporting capacity of the prefabricated staircase 1 is improved, the stability of the overall structure is improved, and the safety of the use of the prefabricated staircase 1 is ensured.
[0046] In one embodiment, Figure 4 As shown, the second steel ladder beam 4 is further provided with a second reinforcing rib 404, and the second reinforcing rib 404 is connected between the fourth plate body 401 and the fifth plate body 402 and connected to the sixth plate body 403. By providing the second reinforcing rib 404, the bearing capacity of the second steel ladder beam 4 is further improved, the service life is extended, the supporting capacity of the prefabricated staircase 1 is improved, the stability of the overall structure is improved, and the safety of the prefabricated staircase 1 is ensured.
[0047] In one embodiment, Figure 3 As shown, the width of the first plate 201 is greater than the width of the second plate 202. By widening the width of the first plate 201, the contact area between the first plate 201 and the prefabricated staircase 1 is increased, the supporting performance of the prefabricated staircase 1 is further improved, and the stability of the prefabricated staircase 1 is ensured.
[0048] In one embodiment, Figure 4 As shown, the width of the fourth plate 401 is greater than the width of the fifth plate 402. By widening the width of the fourth plate 401, the contact area between the fourth plate 401 and the prefabricated staircase 1 is increased, the supporting performance of the prefabricated staircase 1 is further improved, and the stability of the prefabricated staircase 1 is ensured.
[0049] In one embodiment, Figure 1 As shown, the first steel ladder beam 2 is covered with a fireproof layer 6, and the fireproof layer 6 is provided corresponding to the lower surface of the first plate body 201, the second plate body 202 and the third plate body 203. By providing the fireproof layer 6, when a fire occurs, the high temperature is resisted, and the structure of the first steel ladder beam 2 is protected from deformation and collapse within a certain period of time, thereby extending the time for personnel to escape and fire rescue.
[0050] In one embodiment, Figure 2 As shown, the second steel ladder beam 4 is covered with a fireproof layer 6, and the fireproof layer 6 is provided corresponding to the lower surface of the fourth plate body 401, the fifth plate body 402 and the sixth plate body 403. By providing the fireproof layer 6, when a fire occurs, the high temperature is resisted, and the second steel ladder beam 4 is protected from deformation and collapse within a certain period of time, thereby extending the time for personnel to escape and fire rescue.
[0051] In one embodiment, Figure 2 As shown, the connection node structure of the steel ladder beam and the prefabricated staircase further includes an isolation plate 7, which is arranged on the second steel ladder beam 4 and extends vertically upward along the second steel ladder beam 4. The isolation plate 7 isolates the second floor deck 5 from the prefabricated staircase 1. By arranging the isolation plate 7 between the second floor deck 5 and the prefabricated staircase 1, the prefabricated staircase 1 will not rigidly collide with the second floor deck 5 in the event of an earthquake, thereby increasing the service life of the prefabricated staircase 1 and ensuring that the structure is stable and will not collapse when people escape.
[0052] Specifically, the isolation board 7 is a 50 mm thick polystyrene board. By arranging the isolation board 7 between the second floor decking plate 5 and the bottom of the prefabricated staircase 1 , a rigid collision between the prefabricated staircase 1 and the second floor decking plate 5 is avoided.
[0053] In one embodiment, Figure 1 and Figure 2 As shown, a leveling layer 8 is provided on both the first steel ladder beam 2 and the second steel ladder beam 4, and a film is covered on the leveling layer 8 corresponding to the second steel ladder beam 4, and the bottom of the prefabricated staircase 1 is slidably provided on the film. The prefabricated staircase 1 and the second steel ladder beam 4 are slidably connected by the film, and the structure is simple and has high flexibility.
[0054] Specifically, the leveling layer 8 is M15 cement mortar, and the material of the film can be plastic.
[0055] In one embodiment, Figure 2 As shown, the fourth plate body 401 and the edge of the leveling layer 8 corresponding to the prefabricated staircase 1 away from the isolation plate 7 are filled with sealant 9. By filling the sealant 9 at the edge seam between the second steel ladder beam 4 and the prefabricated staircase 1, it is prevented that the film slides off, causing rigid friction of the prefabricated staircase 1, and the staircase structure is easily damaged, affecting the safety of the prefabricated staircase 1.
[0056] When using the connection node structure of the steel ladder beam and the prefabricated staircase in this embodiment, first, the first steel ladder beam 2 and the second steel ladder beam 4 are fixed to the steel ladder columns in the steel structure building respectively; then, the first floor deck 3 and the second floor deck 5 are set on the first steel ladder beam 2 and the second steel ladder beam 4; then, the leveling layer 8 is laid on the first steel ladder beam 2 and the second steel ladder beam 4, and the corresponding leveling layer 8 on the second steel ladder beam 4 is covered with a film; finally, the top of the prefabricated staircase 1 is inserted and set corresponding to the anchor rod 2011 through the grouting hole 101, and the front, back, left and right position of the prefabricated staircase 1 can be fine-tuned by a crowbar. After the position is determined, the first floor deck 3 is cast and the top of the prefabricated staircase 1 is grout-filled and fixedly connected with the first steel ladder beam 2 by grouting material; at this time, the bottom of the prefabricated staircase 1 has been placed on the film, and the isolation plate 7 is fixed between the prefabricated staircase 1 and the second floor deck 5. After the isolation plate 7 is fixed, the second floor deck 5 is cast, and the side seam between the prefabricated staircase 1 and the second steel ladder beam 4 is filled with sealant 9.
[0057] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. A connection node structure of a steel ladder beam and a prefabricated staircase, characterized in that: include: First floor decking (3); A second floor decking plate (5) is arranged spaced apart from the first floor decking plate (3) in the height direction; A prefabricated staircase (1), wherein the top of the prefabricated staircase (1) is arranged corresponding to the first floor deck (3), and the bottom of the prefabricated staircase (1) is arranged corresponding to the second floor deck (5); A first steel staircase beam (2) connecting the first floor deck (3) and the top of the prefabricated staircase (1); A second steel ladder beam (4) is connected to the second floor deck (5) and is slidably connected to the bottom of the prefabricated staircase (1).
2. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 1, characterized in that: The first steel ladder beam (2) comprises a first plate (201) and a second plate (202) which are arranged relatively spaced apart, and the first steel ladder beam (2) further comprises a third plate (203), wherein the third plate (203) connects the first plate (201) and the second plate (202); and / or, The second steel ladder beam (4) comprises a fourth plate body (401) and a fifth plate body (402) which are arranged relatively spaced apart from each other, and the second steel ladder beam (4) further comprises a sixth plate body (403), wherein the sixth plate body (403) connects the fourth plate body (401) and the fifth plate body (402).
3. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 2, characterized in that: An anchor rod (2011) is arranged on the first plate body (201), a grouting hole (101) is opened on the prefabricated staircase (1), and the anchor rod (2011) is inserted and arranged corresponding to the grouting hole (101).
4. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 3, characterized in that: The anchor rod (2011) is connected to the first plate body (201) by welding.
5. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 2, characterized in that: The first steel ladder beam (2) is further provided with a first reinforcing rib (204), the first reinforcing rib (204) being connected between the first plate body (201) and the second plate body (202) and connected to the third plate body (203); and / or, The second steel ladder beam (4) is further provided with a second reinforcing rib (404), and the second reinforcing rib (404) is connected between the fourth plate body (401) and the fifth plate body (402) and connected to the sixth plate body (403).
6. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 2, characterized in that: The width of the first plate (201) is greater than the width of the second plate (202); and / or, The width of the fourth plate body (401) is greater than the width of the fifth plate body (402).
7. The connection node structure of the steel ladder beam and the prefabricated staircase according to any one of claims 2 to 6, characterized in that: The first steel ladder beam (2) is covered with a fireproof layer (6), and the fireproof layer (6) is arranged corresponding to the lower surface of the first plate body (201), the second plate body (202) and the third plate body (203); and / or, The second steel ladder beam (4) is covered with a fireproof layer (6), and the fireproof layer (6) is arranged corresponding to the lower surface of the fourth plate body (401), the fifth plate body (402) and the sixth plate body (403).
8. The connection node structure of the steel ladder beam and the prefabricated staircase according to any one of claims 2 to 6, characterized in that: The connection node structure between the steel ladder beam and the prefabricated staircase further comprises an isolation plate (7), wherein the isolation plate (7) is arranged on the second steel ladder beam (4) and extends vertically upward along the second steel ladder beam (4), and the isolation plate (7) isolates the second floor deck (5) from the prefabricated staircase (1).
9. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 8, characterized in that: The first steel ladder beam (2) and the second steel ladder beam (4) are both provided with a leveling layer (8), the leveling layer (8) corresponding to the second steel ladder beam (4) is covered with a film, and the bottom of the prefabricated staircase (1) is slidably arranged on the film.
10. The connection node structure of the steel ladder beam and the prefabricated staircase according to claim 9, characterized in that: The fourth plate body (401) and the prefabricated staircase (1) are filled with sealant (9) at the edge of the leveling layer (8) away from the isolation board (7) corresponding to the leveling layer (8).