A bolt-connected prefabricated concrete frame structure

Abstract

The utility model discloses a bolt-connected precast concrete frame structure, including an upper precast column, a lower precast column, and a precast column steel connector; an upper shear key is fixedly provided at the center of the top surface of the upper end plate; a lower shear key is fixedly provided at the center of the bottom surface of the lower end plate; the bottom surface of the upper end plate and the top surface of the lower end plate are both fixedly connected to one end surface of a hollow square tube; the upper shear key is pre-buried in the upper precast column, and the upper end plate is fixedly connected to the bottom surface of the upper precast column; a placement cavity is provided at the top of the lower precast column, and the lower end of the lower shear key is placed in the placement cavity. The advantages are: easy operation, effectively reducing the difficulty of precast concrete construction, a placement cavity matching the precast column steel connector is provided on the top surface of the lower precast column, and the quick positioning of the precast concrete can be achieved through the placement cavity; the construction process is simple, which improves the overall construction efficiency, and it is convenient to replace the components when they are damaged, effectively giving play to the advantages of precast concrete.

Description

Technical field:

[0001] The utility model relates to the technical field of precast concrete, in particular to a bolt-connected precast concrete frame structure. Background technology:

[0002] Precast concrete is the core component of prefabricated concrete buildings. It is characterized by factory production and standardized on-site assembly. Compared with traditional construction operations, it can not only greatly shorten the on-site construction cycle, improve production efficiency, and ensure stable product quality; it also has many advantages such as reducing the intensity of on-site workers and material loss, and being more conducive to winter construction. Therefore, precast concrete has been widely used in various construction scenarios.

[0003] However, at present, it is difficult to position, connect and fix the components of precast concrete buildings. Usually, sleeves or slurry anchors are needed for connection and fixation. When the above connection methods are used, each embedded steel bar needs to be positioned, which makes the construction difficult and makes it impossible to effectively utilize the construction advantages of precast concrete. Utility model content:

[0004] The utility model aims to provide a bolt-connected precast concrete frame structure which is simple to construct and can effectively improve the overall construction efficiency of precast concrete.

[0005] The utility model is implemented by the following technical scheme: a bolt-connected precast concrete frame structure, comprising precast columns, the precast columns comprising upper precast columns, lower precast columns, and precast column steel connectors; the precast column steel connectors comprise an upper end plate, a lower end plate, a hollow square tube, an upper shear key, and a lower shear key; the upper shear key is fixedly arranged at the center of the top surface of the upper end plate; the lower shear key is fixedly arranged at the center of the bottom surface of the lower end plate, and bolt holes are uniformly distributed on the periphery of the plate surface of the lower end plate; the bottom surface of the upper end plate and the top surface of the lower end plate are both fixedly connected to one end surface of the hollow square tube;

[0006] The upper shear key is embedded in the upper prefabricated column, and the upper end plate is fixedly connected to the bottom surface of the upper prefabricated column; a placement cavity is provided at the top of the lower prefabricated column, and the lower end of the lower shear key is placed in the placement cavity, and a screw matching the bolt hole is embedded in the top surface of the lower prefabricated column; a grouting inlet is provided on one side of the hollow square tube, and a grouting outlet is provided on the bottom surface of the lower end plate.

[0007] Preferably, the lower shear key is an I-beam, and the lower part of the I-beam is placed in the placement cavity.

[0008] Preferably, the placement cavity is in a prism shape, and the top surface size of the placement cavity is larger than the bottom surface size, and the depth of the placement cavity is smaller than the height of the lower anti-shear key.

[0009] Preferably, the number of the grouting outlets is 2, and each of the grouting outlets is located above a side opening of the I-beam.

[0010] Preferably, reinforcing ribs are evenly distributed on the outer circumferential surface of the hollow square tube, the top surfaces of the reinforcing ribs are fixedly connected to the bottom surface of the upper end plate, and the bottom surfaces of the reinforcing ribs are evenly fixedly connected to the top surface of the lower end plate.

[0011] Preferably, it also includes prefabricated beams and prefabricated beam steel connecting parts; the prefabricated beam steel connecting parts include a first connecting part, a second connecting part, and a connecting plate; one end of the first connecting part is embedded in the prefabricated beam, and one end of the second connecting part is embedded in the prefabricated column; connecting holes are provided on the vertical surfaces of the first connecting part and the second connecting part; the connecting plate is detachably fixedly connected to the first connecting part and the second connecting part respectively through the connecting holes.

[0012] Preferably, the first connecting member and the second connecting member are both I-shaped structures.

[0013] The advantages of the utility model are: easy operation, effectively reducing the difficulty of precast concrete construction, a placement cavity matching the precast column steel connector is opened on the top surface of the lower precast column, and the precast concrete can be quickly positioned through the placement cavity; the precast columns and precast beams are connected by connectors and bolts, the construction process is simple, the overall construction efficiency is improved, and the components are easy to replace when damaged, effectively giving play to the advantages of precast concrete. Description of the drawings:

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model.

[0016] Figure 2 This is a schematic diagram of the lower prefabricated column structure of Example 1.

[0017] Figure 3 This is a schematic diagram of the structure of the prefabricated column steel connector of Example 1.

[0018] Figure 4This is a top view of the prefabricated column steel connector of Example 1.

[0019] Figure 5 This is a schematic diagram of the grouting of Example 1.

[0020] Figure 6 This is a schematic diagram of the overall structure of Example 2.

[0021] Figure 7 This is a schematic diagram of the structure of the prefabricated beam steel connector of Example 2.

[0022] Precast column 1, upper precast column 1.1, lower precast column 1.2, precast column steel connector 2, upper end plate 2.1, lower end plate 2.2, hollow square tube 2.3, upper shear key 2.4, lower shear key 2.5, reinforcing rib 2.6, bolt hole 3, placement cavity 4, screw 5, grouting inlet 6, grouting outlet 7, precast beam 8, precast beam steel connector 9, first connector 9.1, second connector 9.2, connecting plate 9.3. Specific implementation method:

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] like Figure 1-4 A bolt-connected precast concrete frame structure shown includes a precast column 1 and a precast column steel connector 2; wherein, according to the relative installation position, the precast column 1 includes an upper precast column 1.1 and a lower precast column 1.2, and the upper precast column 1.1 and the lower precast column 1.2 are connected via the precast column steel connector 2.

[0026] Specifically, Figure 2-4 As shown, the prefabricated column steel connector 2 includes an upper end plate 2.1, a lower end plate 2.2, a hollow square tube 2.3, an upper shear key 2.4, and a lower shear key 2.5, wherein the upper shear key 2.4 is fixedly provided at the center of the top surface of the upper end plate 2.1, and the lower shear key 2.5 is fixedly provided at the center of the bottom surface of the lower end plate 2.2; the bottom surface of the upper end plate 2.1 and the top surface of the lower end plate 2.2 are both fixedly connected to one end surface of the hollow square tube 2.3. Reinforcement ribs 2.6 are uniformly distributed on the outer circumference of the hollow square tube 2.3, and the top surfaces of the reinforcement ribs 2.6 are fixedly connected to the bottom surface of the upper end plate 2.1, and the bottom surfaces of the reinforcement ribs 2.6 are evenly fixedly connected to the top surface of the lower end plate 2.2.

[0027] In order to facilitate on-site construction, when producing the upper prefabricated column 1.1, the upper shear key 2.4 is pre-buried in the upper prefabricated column 1.1 in advance, and the upper end plate 2.1 is fixedly connected to the bottom surface of the upper prefabricated column 1.1.

[0028] In order to facilitate the fixation of the prefabricated column 1 on site, bolt holes 3 are evenly distributed on the outer periphery of the plate surface of the lower end plate 2.2, a placement cavity 4 is opened on the top of the lower prefabricated column 1.2, and a screw 5 matching the bolt hole 3 is pre-embedded on the top surface of the lower prefabricated column 1.2. In this embodiment, the lower shear key 2.5 is an I-beam, the placement cavity 4 is prism-shaped, and the top surface size of the placement cavity 4 is larger than the bottom surface size, the depth of the placement cavity 4 is smaller than the height of the I-beam, and the lower part of the I-beam can be placed in the placement cavity 4. During construction, the lower end of the lower shear key 2.5 is aligned with the placement cavity 4 to achieve preliminary positioning. After the preliminary positioning is completed, the lower shear key 2.5 is placed in the placement cavity 4, and the screw 5 is passed through the bolt hole 3, and fastened by nuts and gaskets to complete the fixed connection.

[0029] Optionally, in order to strengthen the connection between the upper prefabricated column 1.1 and the prefabricated column steel connector 2, bolt holes 3 can be evenly distributed on the periphery of the plate surface of the upper end plate 2.1, and corresponding screws 5 are pre-embedded in the bottom surface of the upper prefabricated column 1.1. The screws 5 are passed through the bolt holes 3 and fastened with nuts and gaskets.

[0030] In order to strengthen the connection between the prefabricated column 1 and the lower prefabricated column 1.2, Figure 2-3 As shown, a grouting inlet 6 is provided on one side of the hollow square tube 2.3, and a grouting outlet 7 is provided on the bottom surface of the lower end plate 2.2. Preferably, there are two grouting outlets 7, each of which is located above an opening on one side of the I-beam. After the bolt connection is completed, grouting is performed through the grouting inlet 6. Figure 5 shown.

[0031] Embodiment 2:

[0032] The overall structure of this embodiment is the same as that of embodiment 1, except that Figure 6-7 As shown, it also includes prefabricated beams 8 and prefabricated beam steel connectors 9.

[0033] Specifically, the prefabricated beam steel connector 9 includes a first connector 9.1, a second connector 9.2, and a connector plate 9.3. In this embodiment, the first connector 9.1 and the second connector 9.2 are both I-shaped structures. One end of the first connector 9.1 is embedded in the prefabricated beam 8, and one end of the second connector 9.2 is embedded in the prefabricated column 1; the vertical surfaces of the first connector 9.1 and the second connector 9.2 are provided with connecting holes, and the connecting plate 9.3 is detachably fixedly connected to the first connector 9.1 and the second connector 9.2 through the connecting holes.

[0034] Instructions for use: When the bolts of the utility model are used to connect prefabricated concrete frame structures, it involves the connection between prefabricated columns 1 and the connection between prefabricated columns 1 and prefabricated beams 8.

[0035] 1. Connection between prefabricated columns

[0036] First, determine the installation position of the lowest lower prefabricated column 1.2 according to the construction requirements. After fixing the lowest lower prefabricated column 1.2, the upper prefabricated column 1.1 is fixedly connected with the lower prefabricated column 1.2 through the prefabricated column steel connector 2. Specifically, align the lower shear key 2.5 with the placement cavity 4, place the lower end of the lower shear key 2.5 in the placement cavity 4 to complete the initial positioning, and make the screw 5 embedded on the top surface of the lower prefabricated column 1.2 pass through the bolt hole 3 on the lower end plate 2.2, and fix the connection through nuts and washers.

[0037] After the bolt connection is completed, grout is injected through the grouting inlet 6, and the grout flows from the grouting outlet 7 into the placement cavity 4 and the gap between the lower end plate 2.2 and the lower prefabricated column 1.2 to complete the reinforcement.

[0038] 2. Connection between precast columns and precast beams

[0039] After the prefabricated column 1 is installed, the prefabricated beam 8 is installed on the side where the second connecting member 9.2 is embedded. First, the first connecting member 9.1 is aligned with the second connecting member 9.2, and then the screw 5 and the nut are used to fix the connecting plate 9.3 with the first connecting member 9.1 and the second connecting member 9.2 through the connecting holes in turn.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bolt-connected prefabricated concrete frame structure, comprising prefabricated columns, wherein the prefabricated columns include upper prefabricated columns and lower prefabricated columns, characterized in that: Also included are precast column steel connections; The prefabricated column steel connector includes an upper end plate, a lower end plate, a hollow square tube, an upper shear key, and a lower shear key; The upper anti-shear key is fixedly provided at the center of the top surface of the upper end plate; The lower shear key is fixedly arranged at the center of the bottom surface of the lower end plate, and bolt holes are evenly distributed on the periphery of the plate surface of the lower end plate; the bottom surface of the upper end plate and the top surface of the lower end plate are fixedly connected to one end surface of the hollow square tube; The upper anti-shear key is pre-buried in the upper prefabricated column, and the upper end plate is fixedly connected to the bottom surface of the upper prefabricated column; A placement cavity is provided at the top of the lower prefabricated column, the lower end of the lower shear key is placed in the placement cavity, and a screw matching the bolt hole is pre-embedded on the top surface of the lower prefabricated column; A grouting inlet is provided on one side of the hollow square tube, and a grouting outlet is provided on the bottom surface of the lower end plate.

2. A bolt-connected precast concrete frame structure according to claim 1, characterized in that: The lower anti-shear key is an I-beam, and the lower part of the I-beam is placed in the placement cavity.

3. A bolt-connected precast concrete frame structure according to claim 1 or 2, characterized in that: The placement cavity is in a prism shape, and the size of the top surface of the placement cavity is larger than the size of the bottom surface, and the depth of the placement cavity is smaller than the height of the lower anti-shear key.

4. The bolt-connected precast concrete frame structure according to claim 2, characterized in that: The number of the grouting outlets is 2, and each of the grouting outlets is located above a side opening of the I-beam.

5. The bolt-connected precast concrete frame structure according to claim 1, characterized in that: The outer circumferential surface of the hollow square tube is uniformly provided with reinforcing ribs, the top surfaces of the reinforcing ribs are fixedly connected to the bottom surface of the upper end plate, and the bottom surfaces of the reinforcing ribs are uniformly fixedly connected to the top surface of the lower end plate.

6. A bolt-connected precast concrete frame structure according to any one of claims 1, 2, 4 and 5, characterized in that: It also includes precast beams, precast beam steel connectors; The prefabricated beam steel connector includes a first connector, a second connector, and a connecting plate; one end of the first connector is pre-buried in the prefabricated beam, and one end of the second connector is pre-buried in the prefabricated column; The vertical surfaces of the first connecting member and the second connecting member are both provided with connecting holes; The connecting plate is detachably fixedly connected to the first connecting member and the second connecting member respectively through the connecting holes.

7. The bolt-connected precast concrete frame structure according to claim 6, characterized in that: The first connecting member and the second connecting member are both I-shaped structures.

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