Prefabricated reinforced concrete beam and slab structure for transmitting bidirectional earthquake shearing force

Abstract

The utility model discloses a prefabricated reinforced concrete beam and slab structure for transmitting bidirectional earthquake shearing force. The structure comprises a prefabricated reinforced concrete hollow slab, a prefabricated reinforced concrete beam and a post-pouring concrete beam, the prefabricated reinforced concrete beam-slab structure has the advantages that the reinforced concrete beam-slab is prefabricated, and local cast-in-place operation is performed only at the joint of the beam-slab, so that the overall anti-seismic property of the prefabricated beam-slab structure is improved, the workload of on-site concrete pouring is greatly reduced, and the advantages of a prefabricated building are played to the maximum extent. In order to improve the assembly rate of an assembled building and improve the overall performance between prefabricated floor slabs, and consider the characteristic that an earthquake has a horizontal bidirectional effect, a design guidance method is provided for a novel prefabricated reinforced concrete beam-slab structure.

Description

Technical Field

[0001] The utility model relates to a prefabricated reinforced concrete beam-slab structure for transmitting bidirectional earthquake shear force, belonging to the technical field of building engineering. Background Art

[0002] Prefabricated buildings are the future development direction of industrialized buildings. However, due to the presence of a large number of post-cast composite layers, prefabricated integral buildings require more wet construction work and the composite building is heavy, which results in large seismic forces on the structure. However, due to the poor overall connection performance between the floor slabs, the in-plane stiffness of the floor slab structure under horizontal earthquakes cannot meet the rigid floor slab assumption, resulting in reduced seismic performance of the fully prefabricated floor slab. Summary of the invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force with a high degree of assembly and high seismic resistance.

[0004] In order to achieve the above-mentioned purpose, the precast reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force provided by the utility model comprises a precast reinforced concrete hollow slab, a precast reinforced concrete beam and a post-cast concrete beam; wherein the precast reinforced concrete beam is rectangular; the edge of the precast reinforced concrete hollow slab is placed on the inner edge of the top surface of the precast reinforced concrete beam; the post-cast concrete beam is arranged on the top surface of the precast reinforced concrete beam at the outside of the precast reinforced concrete hollow slab and is flush with the precast reinforced concrete hollow slab, thereby connecting the precast reinforced concrete hollow slab and the precast reinforced concrete beam into one.

[0005] The prefabricated reinforced concrete hollow slab consists of a left slab, a middle slab and a right slab which are connected from left to right in sequence by trough-shaped structural hooks and are all hollow structures; a plurality of trough-shaped upper hooks are formed at intervals along the length L direction of the prefabricated reinforced concrete hollow slab at the lower part of the right side surface of the left slab and the middle slab; a plurality of trough-shaped lower hooks corresponding to the trough-shaped upper hooks and interlocking with each other are formed at the upper part of the left side surface of the middle slab and the right slab, thereby connecting the left slab, the middle slab and the right slab into one, so as to transmit the seismic shear force along the short direction of the floor slab.

[0006] The groove depth formed by the groove-shaped upper hook and the groove-shaped lower hook is greater than half of the thickness b of the precast reinforced concrete hollow slab. The groove-shaped upper hook and the groove-shaped lower hook are provided with two groove depths H and h along the length L direction of the precast reinforced concrete hollow slab, which are used to transfer the seismic shear force along the length L direction of the floor slab, wherein the groove depths H and h are alternately arranged at a spacing of L / 4 along the length L direction of the precast reinforced concrete hollow slab.

[0007] The left panel is provided with longitudinal bars, tension bars and overlapping structural bars; a plurality of longitudinal bars are arranged at intervals at the top and bottom of the left panel in a manner extending in the length L direction of the precast reinforced concrete hollow panel, and both ends extend to the outside of both ends of the left panel; the upper and lower ends of each tension bar are respectively connected to a pair of longitudinal bars located at corresponding positions at the top and bottom of the left panel; a plurality of overlapping structural bars are arranged at intervals at the outside of the longitudinal bars located at the top and bottom of the left panel in a manner extending in the width direction of the precast reinforced concrete hollow panel and are connected to the longitudinal bars, the left end extends to the outside of the left side surface of the left panel, and the right end is inserted into the upper hook of the groove structure.

[0008] The middle plate is provided with longitudinal bars, distributed structural bars and tension bars; a plurality of longitudinal bars are arranged at intervals at the top and bottom of the middle plate in a manner extending in the length L direction of the precast reinforced concrete hollow plate, and both ends extend to the outside of both ends of the middle plate; the upper and lower ends of each tension bar are respectively connected to a pair of longitudinal bars located at corresponding positions at the top and bottom of the middle plate; a plurality of distributed structural bars are arranged at intervals at the outside of the longitudinal bars located at the top and bottom of the middle plate in a manner extending in the width direction of the precast reinforced concrete hollow plate and are connected to the longitudinal bars, wherein the left end of the distributed structural bar at the top is inserted into the lower bend hook of the groove-shaped structure, and the right end of the distributed structural bar at the bottom is inserted into the upper bend hook of the groove-shaped structure.

[0009] The right side panel is provided with longitudinal bars, tension bars and overlapping structural bars; a plurality of longitudinal bars are arranged at intervals at the top and bottom of the right side panel in a manner extending in the length L direction of the precast reinforced concrete hollow slab, and both ends extend to the outside of both ends of the right side panel; the upper and lower ends of each tension bar are respectively connected to a pair of longitudinal bars located at corresponding positions at the top and bottom of the right side panel; a plurality of overlapping structural bars are arranged at intervals at the outside of the longitudinal bars located at the top and bottom of the right side panel in a manner extending in the width direction of the precast reinforced concrete hollow slab and are connected to the longitudinal bars, the right end extends to the outside of the right side surface of the right side panel, and the left end is inserted into the lower bend hook of the groove structure.

[0010] The precast reinforced concrete beam comprises longitudinal beam reinforcement and stirrups; a plurality of longitudinal beam reinforcements are arranged at intervals above the bottom and top surface of the precast reinforced concrete beam in a manner extending along the length direction of the precast reinforced concrete beam; a plurality of stirrups are arranged at intervals around both sides, the bottom and the top surface of the precast reinforced concrete beam, and are connected to the longitudinal beam reinforcements.

[0011] The post-cast concrete beams located at the front and rear ends are connected with the front and rear ends of the longitudinal reinforcements on the left slab, middle slab and right slab, and the exposed beam longitudinal reinforcements and beam stirrups on the top surfaces of the left and right precast reinforced concrete beams; the post-cast concrete beams located on the left and right sides are connected with the left or right ends of the lap structural reinforcements on the left and right slabs, and the exposed beam longitudinal reinforcements and beam stirrups on the top surfaces of the front and rear end precast reinforced concrete beams.

[0012] The laying length of the prefabricated reinforced concrete hollow slab on the prefabricated reinforced concrete beam is greater than or equal to 80 mm.

[0013] The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force provided by the utility model has the following characteristics:

[0014] Beneficial effects:

[0015] Reinforced concrete beams and slabs are prefabricated, and only local cast-in-place operations are performed at the beam-slab joints, thereby improving the overall seismic performance of the prefabricated beam-slab structure and greatly reducing the workload of on-site concrete pouring, maximizing the advantages of prefabricated buildings. In order to improve the assembly rate of prefabricated buildings and increase the overall performance between prefabricated slabs, considering the horizontal bidirectional characteristics of earthquakes, a design guidance method is proposed for new prefabricated reinforced concrete beam-slab structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force of the utility model.

[0017] Figure 2 (a), (b), and (c) are schematic cross-sectional views of the left plate, the middle plate, and the right plate of the prefabricated reinforced concrete hollow slab in the present invention, respectively.

[0018] Figure 3 (a) and (b) are Figure 1 Sectional views in BB and AA directions.

[0019] Figure 4 (a) and (b) are schematic diagrams of the connection structure between the left and right plates of the prefabricated reinforced concrete hollow slab and the prefabricated reinforced concrete beam in the utility model.

[0020] Figure 5 It is a schematic diagram of the connection between the short side of the prefabricated reinforced concrete hollow slab and the prefabricated reinforced concrete beam of the utility model. DETAILED DESCRIPTION

[0021] The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force provided by the utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] like Figures 1 to 5As shown, the precast reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force provided by the utility model comprises a precast reinforced concrete hollow slab 1, a precast reinforced concrete beam 2 and a post-cast concrete beam 3; wherein the precast reinforced concrete beam 2 is rectangular; the edge of the precast reinforced concrete hollow slab 1 is placed on the inner edge of the top surface of the precast reinforced concrete beam 2; the post-cast concrete beam 3 is arranged on the top surface of the precast reinforced concrete beam 2 at a position located outside the precast reinforced concrete hollow slab 1, and is flush with the precast reinforced concrete hollow slab 1, thereby connecting the precast reinforced concrete hollow slab 1 and the precast reinforced concrete beam 2 into one.

[0023] The precast reinforced concrete hollow slab 1 is composed of a left slab 12, a middle slab 11 and a right slab 13 which are all hollow structures and are connected from left to right in sequence by groove-shaped structural hooks 4; a plurality of groove-shaped upper hooks 41 are formed at intervals along the length L direction of the precast reinforced concrete hollow slab 1 at the lower part of the right side surface of the left slab 12 and the middle slab 11; a plurality of groove-shaped lower hooks 42 corresponding to the groove-shaped upper hooks 41 and interlocking with each other are formed at the upper part of the left side surface of the middle slab 11 and the right slab 13, thereby connecting the left slab 12, the middle slab 11 and the right slab 13 into one body for transmitting the seismic shear force along the short direction of the floor slab.

[0024] The groove depth formed by the groove-shaped upper hook 41 and the groove-shaped lower hook 42 is greater than half of the thickness of the precast reinforced concrete hollow slab 1. The groove-shaped upper hook 41 and the groove-shaped lower hook 42 are provided with two groove depths H and h along the length L direction of the precast reinforced concrete hollow slab 1, which are used to transmit the seismic shear force along the length L direction of the floor slab, wherein the groove depths H and h are alternately arranged at a spacing of L / 4 along the length L direction of the precast reinforced concrete hollow slab 1.

[0025] The left side plate 12 is provided with longitudinal bars 51, tension bars 53 and overlapping structural bars 54; a plurality of longitudinal bars 51 are arranged at intervals at the top and bottom of the left side plate 12 in a manner extending in the length L direction of the precast reinforced concrete hollow slab 1, and both ends extend to the outside of the two ends of the left side plate 12; the upper and lower ends of each tension bar 53 are respectively connected to a pair of longitudinal bars 51 located at corresponding positions at the top and bottom of the left side plate 12; a plurality of overlapping structural bars 54 are arranged at intervals at the outside of the longitudinal bars 51 located at the top and bottom of the left side plate 12 in a manner extending in the width direction of the precast reinforced concrete hollow slab 1 and are connected to the longitudinal bars 51, the left end extends to the outside of the left side surface of the left side plate 12, and the right end is inserted into the upper hook 41 of the groove structure.

[0026] The middle plate 11 is provided with longitudinal bars 51, distributed structural bars 52 and tension bars 53; a plurality of longitudinal bars 51 are arranged at intervals at the top and bottom of the middle plate 11 in a manner extending in the length L direction of the precast reinforced concrete hollow plate 1, and both ends extend to the outside of both ends of the middle plate 11; the upper and lower ends of each tension bar 53 are respectively connected to a pair of longitudinal bars 51 located at corresponding positions at the top and bottom of the middle plate 11; a plurality of distributed structural bars 52 are arranged at intervals at the outside of the longitudinal bars 51 located at the top and bottom of the middle plate 11 in a manner extending in the width direction of the precast reinforced concrete hollow plate 1 and are connected to the longitudinal bars 51, wherein the left end of the distributed structural bar 52 at the top is inserted into the lower bend hook 42 of the groove-shaped structure, and the right end of the distributed structural bar 52 at the bottom is inserted into the upper bend hook 41 of the groove-shaped structure.

[0027] The right side plate 13 is provided with longitudinal bars 51, tension bars 53 and overlapping structural bars 54; a plurality of longitudinal bars 51 are arranged at intervals at the top and bottom of the right side plate 13 in a manner extending in the length L direction of the precast reinforced concrete hollow slab 1, and both ends extend to the outside of both ends of the right side plate 13; the upper and lower ends of each tension bar 53 are respectively connected to a pair of longitudinal bars 51 located at corresponding positions at the top and bottom of the right side plate 13; a plurality of overlapping structural bars 54 are arranged at intervals at the outside of the longitudinal bars 51 located at the top and bottom of the right side plate 13 in a manner extending in the width direction of the precast reinforced concrete hollow slab 1 and are connected to the longitudinal bars 51, the right end extends to the outside of the right side surface of the right side plate 13, and the left end is inserted into the lower curved hook 42 of the groove structure.

[0028] The precast reinforced concrete beam 2 includes beam longitudinal reinforcement 56 and beam stirrups 55; multiple beam longitudinal reinforcements 56 are arranged at intervals above the bottom and top surface of the precast reinforced concrete beam 2 in a manner extending along the length direction of the precast reinforced concrete beam 2; multiple beam stirrups 55 are arranged at intervals around the two sides, bottom and top surface of the precast reinforced concrete beam 2, and are connected to the beam longitudinal reinforcements 56.

[0029] The post-cast concrete beams 3 located at the front and rear ends are connected with the front and rear ends of the longitudinal reinforcements 51 on the left plate 12, the middle plate 11, and the right plate 13, and the exposed beam longitudinal reinforcements 56 and beam stirrups 55 on the top surfaces of the left and right precast reinforced concrete beams 2; the post-cast concrete beams 3 located on the left and right sides are connected with the left or right ends of the lap structural reinforcements 54 on the left plate 12 and the right plate 13, and the exposed beam longitudinal reinforcements 56 and beam stirrups 55 on the top surfaces of the front and rear end precast reinforced concrete beams 2.

[0030] The laying length of the prefabricated reinforced concrete hollow slab 1 on the prefabricated reinforced concrete beam 2 is greater than or equal to 80 mm.

[0031] The construction method of the precast reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force provided by the utility model is as follows: firstly, a rectangular precast reinforced concrete beam 2 is installed; then, a left plate 12, a middle plate 11 and a right plate 13 are installed on the precast reinforced concrete beam 2 in sequence from left to right; the left plate 12, the middle plate 11 and the right plate 13 are connected by mutually buckled groove-shaped upper hooks 41 and groove-shaped lower hooks 42 to form a precast reinforced concrete hollow plate 1, and the edge of the precast reinforced concrete hollow plate 1 is placed on the inner edge of the top surface of the precast reinforced concrete beam 2; finally, a template is supported on the top surface of the precast reinforced concrete beam 2 at a position outside the precast reinforced concrete hollow plate 1, concrete is poured in the template, and when the concrete is dried and reaches the designed strength, a post-cast concrete beam 3 is formed, and the post-cast concrete beam 3 is flush with the precast reinforced concrete hollow plate 1, thereby forming a precast reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force.

Claims

1. A prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force, characterized in that: The precast reinforced concrete beam-slab structure comprises a precast reinforced concrete hollow slab (1), a precast reinforced concrete beam (2) and a post-cast concrete beam (3); wherein the precast reinforced concrete beam (2) is rectangular; the edge of the precast reinforced concrete hollow slab (1) is placed on the inner edge of the top surface of the precast reinforced concrete beam (2); the post-cast concrete beam (3) is arranged on the top surface of the precast reinforced concrete beam (2) at a position outside the precast reinforced concrete hollow slab (1) and is flush with the precast reinforced concrete hollow slab (1), thereby connecting the precast reinforced concrete hollow slab (1) and the precast reinforced concrete beam (2) into one.

2. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 1, characterized in that: The prefabricated reinforced concrete hollow slab (1) is composed of a left slab (12), a middle slab (11) and a right slab (13) which are connected from left to right in sequence by trough-shaped structural hooks (4) and are all hollow structures; wherein a plurality of trough-shaped structural upper hooks (41) are formed at intervals along the length L direction of the prefabricated reinforced concrete hollow slab (1) at the lower part of the right side surface of the left slab (12) and the middle slab (11); and a plurality of trough-shaped structural lower hooks (42) which correspond to the trough-shaped structural upper hooks (41) and are interlocked with each other are formed at the upper part of the left side surface of the middle slab (11) and the right slab (13), thereby connecting the left slab (12), the middle slab (11) and the right slab (13) into one body for transmitting the seismic shear force along the short direction of the floor slab.

3. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 2, characterized in that: The groove depth formed by the groove-shaped upper hook (41) and the groove-shaped lower hook (42) is greater than half of the thickness of the precast reinforced concrete hollow slab (1). The groove-shaped upper hook (41) and the groove-shaped lower hook (42) are provided with two groove depths H and h along the length L direction of the precast reinforced concrete hollow slab (1) for transmitting the earthquake shear force along the length L direction of the floor slab, wherein the groove depths H and h are alternately arranged at a spacing of L / 4 along the length L direction of the precast reinforced concrete hollow slab (1).

4. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 2, characterized in that: The left side plate (12) is provided with longitudinal bars (51), tension bars (53) and overlapping structural bars (54); a plurality of longitudinal bars (51) are arranged at intervals at the top and bottom of the left side plate (12) in a manner extending in the length L direction of the precast reinforced concrete hollow plate (1), and both ends extend to the outside of both ends of the left side plate (12); the upper and lower ends of each tension bar (53) are respectively connected to a pair of longitudinal bars (51) located at corresponding positions at the top and bottom of the left side plate (12); a plurality of overlapping structural bars (54) are arranged at intervals at the outside of the longitudinal bars (51) located at the top and bottom of the left side plate (12) in a manner extending in the width direction of the precast reinforced concrete hollow plate (1) and are connected to the longitudinal bars (51), the left end of which extends to the outside of the left side surface of the left side plate (12), and the right end of which is inserted into the upper hook (41) of the groove structure.

5. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 2, characterized in that: The middle plate (11) is provided with longitudinal bars (51), distributed structural bars (52) and tension bars (53); a plurality of longitudinal bars (51) are arranged at intervals at the top and bottom of the middle plate (11) in a manner extending in the length L direction of the precast reinforced concrete hollow plate (1), and both ends extend to the outside of both ends of the middle plate (11); the upper and lower ends of each tension bar (53) are respectively connected to a pair of longitudinal bars (51) located at corresponding positions at the top and bottom of the middle plate (11); a plurality of distributed structural bars (52) are arranged at intervals at the outside of the longitudinal bars (51) located at the top and bottom of the middle plate (11) in a manner extending in the width direction of the precast reinforced concrete hollow plate (1) and are connected to the longitudinal bars (51), wherein the left end of the distributed structural bar (52) at the top is inserted into the lower curved hook (42) of the groove structure, and the right end of the distributed structural bar (52) at the bottom is inserted into the upper curved hook (41) of the groove structure.

6. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 2, characterized in that: The right side plate (13) is provided with longitudinal bars (51), tension bars (53) and overlapping structural bars (54); a plurality of longitudinal bars (51) are arranged at intervals at the top and bottom of the right side plate (13) in a manner extending in the length L direction of the precast reinforced concrete hollow plate (1), and both ends extend to the outside of both ends of the right side plate (13); the upper and lower ends of each tension bar (53) are respectively connected to a pair of longitudinal bars (51) located at corresponding positions at the top and bottom of the right side plate (13); a plurality of overlapping structural bars (54) are arranged at intervals at the outside of the longitudinal bars (51) located at the top and bottom of the right side plate (13) in a manner extending in the width direction of the precast reinforced concrete hollow plate (1) and are connected to the longitudinal bars (51), the right end of which extends to the outside of the right side surface of the right side plate (13), and the left end is inserted into the lower curved hook (42) of the groove structure.

7. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 1 or 2, characterized in that: The precast reinforced concrete beam (2) comprises beam longitudinal bars (56) and beam stirrups (55); a plurality of beam longitudinal bars (56) are arranged at intervals above the bottom and top surface of the precast reinforced concrete beam (2) in a manner extending along the length direction of the precast reinforced concrete beam (2); a plurality of beam stirrups (55) are arranged at intervals around both sides, the bottom and the top surface of the precast reinforced concrete beam (2), and are connected to the beam longitudinal bars (56).

8. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 7, characterized in that: The post-cast concrete beams (3) located at the front and rear ends are connected together with the front and rear ends of the longitudinal bars (51) extending outward on the left plate (12), the middle plate (11) and the right plate (13), and the beam longitudinal bars (56) and beam stirrups (55) exposed on the top surfaces of the left and right precast reinforced concrete beams (2); the post-cast concrete beams (3) located at the left and right sides are connected together with the left or right ends of the lap structural bars (54) extending outward on the left plate (12) and the right plate (13), and the beam longitudinal bars (56) and beam stirrups (55) exposed on the top surfaces of the front and rear precast reinforced concrete beams (2).

9. The prefabricated reinforced concrete beam-slab structure for transmitting bidirectional seismic shear force according to claim 1, characterized in that: The length of the prefabricated reinforced concrete hollow slab (1) resting on the prefabricated reinforced concrete beam (2) is greater than or equal to 80 mm.

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