Fabricated steel-concrete combined stair with sliding connection joints

Abstract

The utility model relates to the technical field of assembly type buildings, in particular to an assembly type steel-concrete combined staircase with sliding connection nodes, which comprises a staircase section body and staircase platforms arranged at two ends of the staircase section body, each staircase platform comprises a floor slab layer, and each floor slab layer comprises a staircase floor slab and a platform floor slab. The stair flight body comprises a stair beam used for supporting the stair floor slab, the stair platform further comprises a platform beam used for supporting the platform floor slab, and the stair beam is connected to the platform beam in a sliding mode; relative sliding of the stair beam and the platform beam under the action of horizontal loads such as earthquakes is allowed, damage to the stair or a main body structure caused by rigid connection is avoided, and the requirement for the anti-seismic performance of the steel-concrete stair is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fabricated building, in particular to a fabricated steel-concrete combined stair with a sliding connection node. BACKGROUND

[0002] In recent years, fabricated building, especially fabricated steel structure building, is widely used in China. As an important component of fabricated building, the stair plays an important role in evacuation. It is required to ensure that the stair itself is not damaged and personnel can safely evacuate when disaster occurs. Therefore, it has high seismic requirements. Among them, the design of the connection node is an important part of the seismic design of the stair.

[0003] For the design of the connection node, the patent for invention with publication number CN106567458A discloses a fabricated steel-concrete combined beam-column frame structure system. By pouring a concrete protective layer on the outer layer of the steel node and the steel-concrete combined section of the beam and column, the performance of the steel structure part is improved, and the steel-concrete combined stair is ensured not to have structural integrity problems.

[0004] However, under the action of dynamic load such as earthquake, the stair and the main structure may have relative displacement. In addition, the additional stress generated by the rigid or hinged connection node of the structure similar to the above may cause damage to the local or overall structure of the stair. In order to solve the above problems, a feasible design is to use a slidable connection node between the stair beam and the platform beam, allowing the stair to freely slide in the horizontal direction, thereby reducing the additional stress generated by the mutual constraint of the stair beam and the stair platform. The specific method of the slidable connection node of the concrete stair is given in the national standard atlas "20G367-2". However, in the field of fabricated steel-concrete combined stairs with sliding connection nodes, there is a lack of corresponding design of slidable connection nodes. SUMMARY

[0005] To solve the problems in the prior art, the purpose of the utility model is to provide a fabricated steel-concrete combined stair with a sliding connection node, which has a slidable connection node between the stair beam and the platform beam, allowing the steel-concrete stair to freely slide in the horizontal direction, thereby improving the seismic performance of the stair and protecting the stair and the main structure connected with the stair.

[0006] The technical scheme for solving the problem of the utility model provides a fabricated steel-concrete combined stair with a sliding connection node, which includes a stair segment body and stair platforms arranged at both ends of the stair segment body. The stair platform includes a floor layer, and the floor layer includes a stair floor and a platform floor. The stair segment body includes a stair beam for supporting the stair floor, and the stair platform further includes a platform beam for supporting the platform floor. The stair beam is slidably connected to the platform beam.

[0007] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: the ladder beam is connected with the platform beam by sliding structure, and the sliding structure includes the first connecting piece arranged on the outer edge of the ladder beam and the second connecting piece arranged on the outer edge of the platform beam;Connecting hole is arranged on the first connecting piece, and strip slot is arranged on the second connecting piece, and the first connecting piece and the second connecting piece are connected by bolt sequentially passing through the connecting hole and the strip slot.

[0008] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: the number of strip slot is at least two, and the number of connecting hole corresponds to the strip slot.

[0009] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: the first connecting piece and the second connecting piece are equipped with friction-reducing piece for reducing friction between, and the first connecting piece and the nut of bolt are also equipped with the friction-reducing piece.

[0010] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: sliding space is arranged between the ladder beam and the platform beam, and the width of the sliding space is not less than the length of the strip slot;Gap is arranged between the stair floor and the platform floor, and the width of the gap is not less than the length of the strip slot.

[0011] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: flexible piece for plugging the gap is arranged in the gap.

[0012] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: the bottom of the gap is equipped with support for preventing the flexible piece from falling.

[0013] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: the stair platform further includes finishing layer arranged above the floor layer, and the finishing layer includes cross-seam steel plate arranged above the gap.

[0014] Further, the utility model provides a kind of assembled steel-concrete combined stair with sliding connection node, it can also have the following characteristics: the finishing layer includes rubber strip arranged on both sides of the cross-seam steel plate.

[0015] Further, the assembly type steel-concrete combined stair with the sliding connection node has the features that a waterproof sealing strip is arranged between the cross-seam steel plate and the gap.

[0016] The utility model discloses the beneficial effect is:

[0017] 1. In the application, the relative sliding of the ladder beam and the platform beam under the action of horizontal load such as earthquake is allowed, the damage of the stair or the main structure caused by rigid connection can be avoided, and the anti-seismic performance of the steel-concrete stair is improved.

[0018] 2. In the application, the design of the strip-shaped groove allows the bolt to move within a certain range, so that the ladder beam has a certain degree of freedom in the horizontal direction, the horizontal load is avoided to be borne by the ladder beam, and the safety of the stair and the column connected with the same is protected. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model. In these drawings, similar reference numerals are used to designate similar elements. The drawings in the following description are some embodiments of the present utility model, not all embodiments. For ordinary skilled in the art, other drawings can be obtained according to these drawings without paying creative labor.

[0020] Figure 1 It is the structural schematic diagram of the first perspective of the utility model;

[0021] Figure 2 It is the structural schematic diagram of the second perspective of the utility model;

[0022] Figure 3 It is the structural schematic diagram of the first perspective of the sliding structure of the utility model;

[0023] Figure 4 It is the structural schematic diagram of the second perspective of the sliding structure of the utility model;

[0024] Figure 5 It is the structural schematic diagram of the third perspective of the sliding structure of the utility model;

[0025] Figure 6 It is the structural schematic diagram of the decoration layer of the utility model.

[0026] In the drawing:

[0027] 1, stair segment body; 11, step plate; 12, stair beam; 2, stair platform; 21, stair floor; 22, platform floor; 23, platform beam; 24, finishing layer; 241, cross-seam steel plate; 242, rubber strip; 3, sliding structure; 31, first connecting piece; 32, second connecting piece; 33, bolt; 34, strip-shaped slot; 35, friction-reducing piece; 4, sliding space; 5, gap; 6, flexible piece; 7, support; 8, water stop. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] The present application improves an assembly type steel-concrete combined stair with a sliding connection node, and the specific structure is described as follows:

[0030] Referring to Figures 1 to 6 , the assembly type steel-concrete combined stair with a sliding connection node comprises a stair segment body 1 and stair platforms 2 arranged at both ends of the stair segment body 1. The stair platform 2 comprises a floor layer and a finishing layer 24 arranged above the floor layer. The floor layer comprises a stair floor 21 and a platform floor 22. The stair segment body 1 comprises a step plate 11 and a stair beam 12 for supporting the stair floor 21. Preferably, the stair beam 12 and the step plate 11 are integrally assembled and shipped from the factory, and are assembled and installed with the stair platform 2 on site, which facilitates transportation and reduces the complexity of on-site construction. The stair platform 2 further comprises a platform beam 23 for supporting the platform floor 22. The stair beam 12 is slidably connected to the platform beam 23. In use, the relative sliding of the stair beam 12 and the platform beam 23 under the action of horizontal loads such as earthquakes is allowed, which can avoid damage to the stair or the main structure caused by rigid connection and improve the seismic performance of the steel-concrete stair. In some embodiments, the stair platform 2 comprises an upper stair platform and a lower stair platform. The stair beam 12 can be slidably connected to the platform beam 23 of the upper stair platform at one end and slidably connected to the platform beam 23 of the lower stair platform at the other end, or fixedly connected to the platform beam 23 of the upper stair platform at one end and slidably connected to the platform beam 23 of the lower stair platform at the other end.

[0031] In a specific embodiment, as Figures 2 to 5As shown, the ladder beam 12 is connected with the platform beam 23 through the sliding structure 3, which comprises the first connecting piece 31 arranged on the outer edge of the ladder beam 12 and the second connecting piece 32 arranged on the outer edge of the platform beam 23; the first connecting piece 31 is provided with a connecting hole, and the second connecting piece 32 is provided with a strip-shaped slot 34, and the first connecting piece 31 and the second connecting piece 32 are connected through the bolt 33 which passes through the connecting hole and the strip-shaped slot 34 in sequence. The design of the strip-shaped slot 34 allows the bolt 33 to move within a certain range, thereby allowing the ladder beam 12 to have a certain degree of freedom in the horizontal direction, and the displacement release avoids the transmission of internal force from the ladder beam 12 to the platform beam 23 under the horizontal load, thereby protecting the platform beam 23 and the structure connected therewith.

[0032] The number of strip-shaped slots 34 is determined according to design needs, and is at least two, and the number of connecting holes corresponds to the strip-shaped slots 34. In a specific embodiment, as shown in Figure 3 The number of strip-shaped slots 34 is preferably three, which can further improve the stability of the connection between the ladder beam 12 and the platform beam 23, and compared with the stress of single-point connection, can more evenly distribute the load, reduce local stress concentration, and improve the carrying capacity of the overall structure.

[0033] A friction-reducing piece 35 is arranged between the first connecting piece 31 and the second connecting piece 32 for reducing friction, and a friction-reducing piece 35 is also arranged between the first connecting piece 31 and the nut of the bolt 33, and the friction-reducing piece 35 is preferably a polytetrafluoroethylene plate, which has a very low friction coefficient and can significantly reduce the friction between the connecting piece and the ladder beam 12 and between the ladder beam 12 and the nut of the bolt 33.

[0034] A sliding space 4 with a width not less than the length of the strip-shaped slot 34 is arranged between the ladder beam 12 and the platform beam 23 to ensure that the sliding connection between the ladder beam 12 and the platform beam 23 can be smoothly carried out, and correspondingly, a gap 5 with a width not less than the length of the strip-shaped slot 34 is arranged between the stair floor 21 and the platform floor 22 to ensure that the floor layer will not be damaged when the ladder beam 12 slides.

[0035] In some embodiments, as shown in Figure 3 and Figure 6 A flexible piece 6 for plugging the gap 5 is arranged in the gap 5, which can be a rock wool board or an extruded board, and will not affect the free sliding of the ladder beam 12 while filling and plugging the gap 5.

[0036] As a further improvement of the above-mentioned embodiments, a support 7 for preventing the flexible piece 6 from falling is arranged at the bottom of the gap 5, and the support 7 is preferably a steel plate support 7, and the bottom of the support 7 is preferably plastered with a wire mesh.

[0037] As shown in Figure 6As shown, the finishing layer 24 includes a U-shaped cross-slit steel plate 241 arranged above the slit 5, which can increase the strength of the finishing layer 24 and protect the slit 5 below. The finishing layer 24 further includes thermoplastic rubber strips 242 arranged on both sides of the cross-slit steel plate 241, which do not limit the longitudinal displacement of the ladder steps while meeting the building function. A water stop 8 formed by a waterproof coiled material is arranged between the cross-slit steel plate 241 and the slit 5, which is used to prevent rainwater or groundwater from seeping in through the slit 5, thereby improving the waterproof performance of the steel-concrete stair.

[0038] The above-described content can be implemented individually or in various combinations, and these variations are within the protection scope of the present application.

[0039] In the description of the present application, it should be noted that the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including one" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0040] In the description of the present application, it should also be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "several" is two or more.

[0041] The above is a further detailed description of the present application in conjunction with specific preferred embodiments, and cannot be considered as limiting the specific embodiments of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. An assembled steel-concrete composite stair with sliding connection nodes, comprising a stair segment body (1) and stair platforms (2) arranged at both ends of the stair segment body (1), the stair platform (2) comprising a floor layer, the floor layer comprising a stair floor (21) and a platform floor (22), characterized in that, The stair step body (1) comprises a stringer (12) for supporting the stair floor (21), the stair platform (2) further comprises a platform beam (23) for supporting the platform floor (22), the stringer (12) is slidably connected to the platform beam (23); the stringer (12) and the platform beam (23) are connected through a sliding structure (3), the sliding structure (3) comprises a first connecting piece (31) arranged at the outer edge of the stringer (12) and a second connecting piece (32) arranged at the outer edge of the platform beam (23); the first connecting piece (31) is provided with a connecting hole, the second connecting piece (32) is provided with a strip-shaped slot (34), and the first connecting piece (31) and the second connecting piece (32) are connected through a bolt (33) sequentially penetrating through the connecting hole and the strip-shaped slot (34).

2. The fabricated steel-concrete composite stair with sliding connection node according to claim 1, characterized in that, The number of the strip-shaped slots (34) is at least two, and the number of the connecting holes corresponds to the number of the strip-shaped slots (34).

3. The prefabricated steel-concrete composite stair with sliding connection node according to claim 1, characterized in that, The first connecting piece (31) and the second connecting piece (32) are provided with a friction-reducing piece (35) for reducing friction, and the first connecting piece (31) and the nut of the bolt (33) are also provided with the friction-reducing piece (35).

4. The prefabricated steel-concrete composite stair with sliding connection node according to claim 1, characterized in that, The stringer (12) and the platform beam (23) are provided with a sliding space (4), the width of the sliding space (4) is not less than the length of the strip-shaped slot (34); the stair floor (21) and the platform floor (22) are provided with a gap (5), and the width of the gap (5) is not less than the length of the strip-shaped slot (34).

5. The prefabricated steel-concrete composite stair with sliding connection node according to claim 4, characterized in that, The gap (5) is provided with a flexible piece (6) for sealing the gap (5).

6. The prefabricated steel-concrete composite stair with sliding connection node according to claim 5, characterized in that, The bottom of the gap (5) is provided with a support (7) for preventing the flexible piece (6) from falling.

7. The prefabricated steel-concrete composite stair with sliding connection node according to claim 4, characterized in that, The stair platform (2) further comprises a decoration layer (24) arranged above the floor layer, the decoration layer (24) comprises a cross-seam steel plate (241) arranged above the gap (5).

8. The prefabricated steel-concrete composite stair with sliding connection node according to claim 7, characterized in that, The decoration layer (24) comprises rubber strips (242) arranged on both sides of the cross-seam steel plate (241).

9. The prefabricated steel-concrete composite stair with sliding connection node according to claim 7, characterized in that, The cross-seam steel plate (241) and the gap (5) are provided with a water stop belt (8) for waterproofing.

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