Hybrid steel skeleton prefabricated part

Abstract

The utility model discloses a hybrid steel skeleton prefabricated part, which can be used for a column / beam / wall in a building structure and comprises a hybrid steel skeleton, a concrete layer is poured outside the hybrid steel skeleton, the hybrid steel skeleton replaces a traditional steel reinforcement skeleton and comprises a plurality of longitudinal members, a plurality of groups of stirrups are arranged among the longitudinal members, and the stirrups are arranged in the longitudinal members. The two ends of the longitudinal component extend out of the concrete layer, connecting structures are arranged at the ends of the longitudinal component, all or part of the longitudinal component is made of profile steel / steel plates and is equivalent to longitudinal steel bars in the reinforced concrete component, and stirrups are not changed. By adopting the mixed steel framework, the cast-in-place plain concrete and the cast-in-place reinforced concrete structure, the component can be installed like a steel structure, the overall structural strength is high, the operation is simple, and the construction period is shortened; traditional steel bar construction modes and the like are omitted, procedures are reduced, and construction efficiency is improved; the problems that a prefabricated concrete structure system is poor in stress system, long in construction period and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and particularly relates to a hybrid steel skeleton precast member. Background Technique

[0002] Structural columns / beams / walls are important components in building structures, used to support floor loads and transfer the loads to the foundation. In modern buildings, reinforced concrete structures are widely used, which combines the compressive performance of concrete and the tensile performance of steel bars to form a strong and economical structural form. However, various defects may be encountered in actual applications. The construction process is complex. The construction of reinforced concrete structures includes multiple steps, such as formwork installation, steel bar binding, concrete pouring and curing, etc. The whole process is relatively complex and the construction period is long. The force system is poor, especially the force at the joints and the seismic performance is insufficient, so the height is limited. The on-site steel bar binding speed is slow, there are many scaffolding formworks, and it is not environmentally friendly. The sleeve grouting at the joints of precast reinforced concrete structure components is not dense, which becomes a great hidden danger. These defects will not only affect the beauty of the structure, but more importantly, may threaten the safety and durability of the structure. Content of the Utility Model

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides a hybrid steel skeleton precast member with high overall structural strength and simple operation; the traditional construction methods such as steel bars are cancelled, the processes are reduced, and the construction efficiency is improved.

[0004] To achieve the above object, the utility model adopts the following technical scheme: A hybrid steel skeleton precast member includes a hybrid steel skeleton, and a concrete layer is poured outside the hybrid steel skeleton. The hybrid steel skeleton replaces the traditional steel bar skeleton. The hybrid steel skeleton includes a plurality of longitudinal members, and several groups of stirrups are arranged between the longitudinal members. The two ends of the longitudinal members extend out of the concrete layer, and a connection structure is arranged at the ends. All or part of the longitudinal members are made of profiled steel / steel plates, which are obtained by strength equivalent substitution of the longitudinal steel bars in the reinforced concrete member, and the stirrups remain unchanged. The longitudinal profiled steel / steel plates / steel bars are welded by stirrups to form a hybrid steel skeleton. By adopting the hybrid steel skeleton and casting plain concrete in situ, the whole is equivalent to a cast-in-place reinforced concrete structure. The stirrups are arranged at equal intervals in groups between the longitudinal members composed of multiple pairs. The two ends of the longitudinal members extend out of the concrete layer to form a connection section, and are connected pairwise with the extended parts of the upper and lower structures on site.

[0005] Further, the area size of the profiled steel / steel plate is equivalent according to the strength and area of the vertical steel bars of the reinforced concrete member, and the equivalent formula is steel strength * steel area ≥ steel bar strength * steel bar area.

[0006] Furthermore, both ends of the longitudinal member extend 200 - 500 mm out of the concrete layer.

[0007] Furthermore, when the hybrid steel skeleton precast member is a column structure, the connection structure is a number of connection holes opened at the ends of the longitudinal member. The connection structure is the connection holes opened at both ends of the longitudinal member, which are used for connecting and fixing the upper and lower column structures. The connection method is similar to the steel structure connection method, and only 400 - 1000 mm of joint concrete needs to be poured on site.

[0008] Furthermore, pouring holes are arranged inside the hybrid steel skeleton. The pouring holes are several round holes or square holes arranged inside the column for pouring the joint concrete in a top - down manner.

[0009] Furthermore, when the hybrid steel skeleton precast member is a beam structure, the connection structure includes a connection web arranged at the end of the longitudinal member. The connection web is fixed between the longitudinal members and is centered. A number of connection holes are arranged at the outer end of the connection web. Through the connection web, it is connected to the outrigger of the beam structure and the column structure on site. The connection method is similar to the steel structure connection method, and only 400 - 1000 mm of joint concrete needs to be poured on site.

[0010] Furthermore, a number of evenly - spaced stud bolts are arranged along the length direction on the inner side of the longitudinal member. Built - in stud bolts are welded on the inner side of the longitudinal member to increase the bonding force between the steel or steel plate and the concrete, or the anti - slip ability. The longitudinal member can be made of ordinary steel or steel plate, or corrugated steel plate. As a shear - force transfer element, the stud bolt can effectively transfer the shear force between the steel plate and the concrete to each other. This transfer mechanism ensures that the steel plate and the concrete can work as a whole, jointly bear the load, enhance the connection strength between the steel plate and the concrete, and thus improve the load - bearing capacity of the entire structural system.

[0011] The utility model can be used for columns / beams / walls in building structures. By adopting a hybrid steel skeleton and cast - in - place plain concrete, it is equivalent to a cast - in - place reinforced concrete structure as a whole. The hybrid steel skeleton is obtained by strength - equivalent substitution of the steel bars in the reinforced concrete structure, and the traditional steel bar skeleton is replaced by the hybrid steel skeleton. The hybrid steel skeleton enables the member to be installed like a steel structure, with high overall structural strength, simple operation, and shortened construction period; the traditional construction methods such as steel bars are cancelled, the construction process is reduced, and the construction efficiency is improved; the use of profiled steel / steel plates instead of steel bars is minimized, and the welding workload is reduced, thus minimizing the cost to the greatest extent. It solves the problems existing in the assembled composite structure and precast concrete structure system in the existing building projects, such as poor force - bearing system, non - dense sleeve grouting at the joints, especially insufficient force - bearing and seismic performance at the joints, and high cost and low industrialization degree in the steel - concrete composite structure system. Description of the Drawings

[0012] Figure 1 Schematic diagram of the internal hybrid steel skeleton structure of the structural column in the first embodiment of the present utility model;

[0013] Figure 2 Schematic diagram of the internal hybrid steel skeleton structure of the structural beam in the second embodiment of the present utility model;

[0014] Figure 3 Schematic diagram of the shear wall structure in the third embodiment of the present utility model;

[0015] Annotation description: 1. Longitudinal member; 2. Stirrup; 3. Connection hole; 4. Stud; 5. Connection web. Detailed implementation manners

[0016] Refer to Figures 1 to 3 A further description is made on the detailed implementation manners of a hybrid steel skeleton precast member of the present utility model.

[0017] A hybrid steel skeleton precast member includes a hybrid steel skeleton, and a concrete layer is cast outside the hybrid steel skeleton. The hybrid steel skeleton replaces the traditional steel bar skeleton. The hybrid steel skeleton includes a plurality of longitudinal members 1, and several groups of stirrups 2 are arranged between the longitudinal members 1. Both ends of the longitudinal members 1 extend out of the concrete layer, and a connection structure is arranged at the end. All or part of the longitudinal members are made of profiled steel / plate, which is obtained by strength equivalent substitution of the longitudinal steel bars in the reinforced concrete member, and the stirrups remain unchanged. The longitudinal profiled steel / plate / steel bars are welded by stirrups to form a hybrid steel skeleton. By adopting the hybrid steel skeleton and casting plain concrete in situ, the whole is equivalent to the cast-in-place reinforced concrete structure. The stirrups are arranged at equal intervals in groups between the longitudinal members composed of multiple pairs. Both ends of the longitudinal members extend out of the concrete layer to form a connection section, which is connected pairwise with the extended parts of the upper and lower layer structures on site.

[0018] Preferably in this embodiment, the area size of the profiled steel / plate is equivalent to that of the vertical steel bars in the reinforced concrete member according to strength, and the equivalent formula is steel strength * steel area ≥ steel bar strength * steel bar area.

[0019] Preferably in this embodiment, both ends of the longitudinal member 1 extend out of the concrete layer by 200 - 500 mm.

[0020] In the first embodiment, as Figure 1 shown, when the hybrid steel skeleton precast member is a column structure, the longitudinal members adopt two opposed channel steels or other profiled steels, and the connection structure is a plurality of connection holes 3 opened at the ends of the longitudinal member 1. The connection structure is the connection holes opened at both ends of the longitudinal member 1, which are used for the connection and fixation between the upper and lower layer column structures. The connection method is similar to the steel structure connection method, and only 400 - 1000 mm of joint concrete needs to be cast on site.

[0021] Preferably in this embodiment, a casting hole is provided inside the hybrid steel skeleton. The casting hole is several circular holes or square holes arranged inside the column for casting the node concrete in a top-down manner.

[0022] Embodiment 2, as Figure 2 shown, when the hybrid steel skeleton precast member is a beam structure, the longitudinal members adopt two oppositely arranged steel plates. The connecting structure includes a connecting web 5 provided at the end of the longitudinal member. The connecting web 5 is fixed between the longitudinal members and is centered. A number of connecting holes 3 are provided at the outer end of the connecting web. Through the connecting web 5, it is connected to the cantilever of the beam structure and the column structure on site. The connecting method is similar to the steel structure connecting method, and only 400 - 1000 mm of node concrete needs to be cast on site.

[0023] Preferably in this embodiment, a number of evenly spaced stud bolts 4 are arranged along the length direction on the inner side of the longitudinal member 1. Stud bolts are welded inside the longitudinal member 1 to increase the bonding force or anti-slip ability between the steel or steel plate and the concrete. The longitudinal member can be made of ordinary steel or steel plate, or corrugated steel plate. As a shear transfer element, the stud bolt can effectively transfer the shear force between the steel plate and the concrete to each other. This transfer mechanism ensures that the steel plate and the concrete can work as a whole, jointly bear the load, enhances the connection strength between the steel plate and the concrete, and thus improves the load-bearing capacity of the entire structural system.

[0024] Embodiment 3, when the hybrid steel skeleton precast member is used in a shear wall structure, it includes multiple groups of longitudinal members spliced together. The longitudinal members can all be made of section steel / steel plate, or part of them can be made of section steel / steel plate. When part of them are section steel / steel plate (the combination method of section steel / steel plate and steel bars), as Figure 3 shown, specifically, the outermost ends on both sides of the longitudinal member can adopt section steel / steel plate to play the role of assembly positioning and main connection. The internal longitudinal members are lap-welded with steel bars, and horizontally, steel bars (part of the stirrups) are used to weld and connect adjacent longitudinal members; or a set of longitudinal section steel / steel plates (2 pieces) can be arranged oppositely at a certain distance, and several longitudinal steel bars are arranged between every two groups of section steel / steel plates, and horizontally, steel bars are used to weld and connect adjacent longitudinal members.

[0025] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A hybrid steel skeleton prefabricated component, characterized in that: It comprises a hybrid steel skeleton, a concrete layer is cast outside the hybrid steel skeleton, the hybrid steel skeleton replaces the traditional steel skeleton, the hybrid steel skeleton comprises a plurality of longitudinal members, a plurality of stirrups are arranged between the longitudinal members, both ends of the longitudinal members extend out of the concrete layer, and connection structures are arranged at the ends, all or part of the longitudinal members adopt steel sections / steel plates, which are obtained by strength equivalent replacement of the longitudinal steel bars in the reinforced concrete members, the stirrups remain unchanged, and the longitudinal steel sections / steel plates / steel bars are welded through stirrups to form the hybrid steel skeleton.

2. The hybrid steel skeleton prefabricated component according to claim 1 is characterized in that: The area size of the steel section / steel plate is calculated based on the strength and area equivalence of the vertical reinforcement of the reinforced concrete component. The equivalent formula is steel strength * steel area ≥ reinforcement strength * reinforcement area.

3. The hybrid steel skeleton prefabricated component according to claim 1 is characterized in that: Both ends of the longitudinal member extend out of the concrete layer by 200-500 mm.

4. The hybrid steel skeleton prefabricated component according to claim 1 is characterized in that: When the hybrid steel skeleton prefabricated component is a column structure, the connection structure is a plurality of connection holes opened at the end of the longitudinal component.

5. The hybrid steel skeleton prefabricated component according to claim 4 is characterized in that: Casting holes are arranged inside the hybrid steel skeleton.

6. The hybrid steel skeleton prefabricated component according to claim 1, characterized in that: When the hybrid steel skeleton prefabricated component is a beam structure, the connection structure includes a connection web arranged at the end of the longitudinal component, the connection web is fixed between the longitudinal components and arranged centrally, and a plurality of connection holes are arranged at the outer end of the connection web.

7. The hybrid steel skeleton prefabricated component according to claim 1, characterized in that: A plurality of evenly spaced pegs are arranged on the inner side of the longitudinal member along the length direction.

Images