Beam-through fabricated reinforced concrete beam-column joint and construction method

Abstract

The invention provides a beam-through assembly type reinforced concrete beam-column joint and a construction method. The joint comprises an upper prefabricated column, a lower prefabricated column and a prefabricated beam. The assembly ends of the upper prefabricated column and the lower prefabricated column are respectively reserved with overhanging longitudinal bars for splicing; a plurality of steel bar sleeves penetrate through the assembly position of the precast beam in the vertical direction, and ultra-high performance concrete is poured into the steel bar sleeves. The overhanging longitudinal bars of the upper prefabricated column and the lower prefabricated column are inserted into the two ends of the steel bar sleeve respectively, so that the upper prefabricated column and the lower prefabricated column are connected to the prefabricated beam; a layer of ultra-high performance concrete is laid on the splicing interface between the upper prefabricated column and the prefabricated beam and the splicing interface between the lower prefabricated column and the prefabricated beam respectively. The joint has the advantages of being high in prefabrication degree, convenient to construct, safe, reliable and the like, and is suitable for connection of reinforced concrete beam columns of various fabricated buildings.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a beam-through prefabricated reinforced concrete beam-column node and a construction method. Background Art

[0002] my country has vigorously developed prefabricated buildings to achieve high-quality development of building industrialization. As the key force transmission part in the prefabricated reinforced concrete frame structure, the performance of the beam-column joint directly affects the seismic performance of the structure.

[0003] At present, there are still many problems in the actual engineering application of the traditional beam-through prefabricated reinforced concrete beam-column node. On the one hand, due to the crisscrossing of the steel bars of the prefabricated beams and prefabricated columns in the node area, the steel bars often collide with each other when assembling the node, which increases the difficulty of construction; on the other hand, the longitudinal bars of the upper and lower prefabricated columns are usually connected by grouting sleeves or mechanical sleeves. This connection method requires high manufacturing accuracy of prefabricated components, and the construction process is complicated. The quality inspection after the steel bar connection is also relatively difficult. Based on the above problems, it is particularly important to develop a new type of connection node and construction method that is simple, efficient and easy to construct for the promotion and application of prefabricated buildings. Summary of the invention

[0004] In view of this, the present invention provides a beam-through assembled reinforced concrete beam-column node and a construction method thereof, aiming to solve the problems of high construction difficulty and complex construction process of beam-through assembled reinforced concrete beam-column nodes in the prior art. The beam-through assembled reinforced concrete beam-column node proposed in the present invention has the advantages of high degree of prefabrication, convenient construction, safety and reliability, and is suitable for the connection of reinforced concrete beams and columns of various types of assembled buildings.

[0005] The present invention adopts the following scheme:

[0006] The present application provides a beam-through assembled reinforced concrete beam-column node, comprising: an upper prefabricated column, a lower prefabricated column and a prefabricated beam;

[0007] The upper precast column and the lower precast column are both reinforced concrete columns, and the reinforced concrete columns have a plurality of longitudinal bars and a plurality of stirrups that are bundled with each other. The assembly ends of the upper precast column and the lower precast column are respectively reserved with extended longitudinal bars for splicing;

[0008] The precast beam is a reinforced concrete beam, which has a plurality of steel sleeves running through it in the vertical direction at the assembly position, and the steel sleeves are poured with ultra-high performance concrete; the extended longitudinal reinforcements of the upper precast column and the lower precast column are respectively inserted into the two ends of the steel sleeves, so that the upper precast column and the lower precast column are connected to the precast beam;

[0009] Wherein, a layer of ultra-high performance concrete is laid on the joint interfaces between the upper prefabricated column and the prefabricated beam, and between the lower prefabricated column and the prefabricated beam.

[0010] As a further optimization, the extending length of the extending longitudinal reinforcement of the upper precast column and the lower precast column is less than or equal to half of the height of the steel sleeve.

[0011] As a further optimization, the steel bar sleeve is a threaded sleeve having both external threads and internal threads.

[0012] As a further optimization, the prefabricated beam includes a plurality of transverse reinforcements and stirrups bundled with each other.

[0013] The present application further provides a construction method for a beam-through assembled reinforced concrete beam-column node, which uses a beam-through assembled reinforced concrete beam-column node as described in any one of the above, and comprises the following steps:

[0014] S1: Prefabricate the upper and lower prefabricated columns. During prefabrication, reserve the extended longitudinal reinforcement for splicing at the assembly ends of the upper and lower prefabricated columns;

[0015] S2: prefabricate the prefabricated beams, and embed multiple steel sleeves at the assembly locations of the prefabricated beams during prefabrication;

[0016] S3: First, lay a layer of ultra-high performance concrete on the splicing interface of the lower precast column, insert the extended longitudinal reinforcement of the lower precast column into the steel sleeve of the precast beam, and then level the precast beam;

[0017] S4: Pour ultra-high performance concrete into the steel sleeve, lay a layer of ultra-high performance concrete on the splicing interface of the precast beam, and then slowly insert the extended longitudinal reinforcement of the upper precast column into the steel sleeve; and in this process, pay attention to whether the gap between the upper precast column and the precast beam is completely filled with ultra-high performance concrete, and clean up the squeezed ultra-high performance concrete in time. If the ultra-high performance concrete does not fill the gap, repeat the above steps;

[0018] S5: After the ultra-high performance concrete hardens and develops strength, the node assembly is completed.

[0019] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0020] (1) The upper and lower prefabricated columns of the node are connected by pouring ultra-high performance concrete into the threaded sleeve, eliminating the need for cumbersome procedures such as tying steel bars, supporting formwork, and pouring a large amount of concrete at the construction site. Therefore, this assembly method is simple and efficient, and has relatively low requirements for the manufacturing accuracy of prefabricated components.

[0021] (2) During assembly, the node only needs to cast the ultra-high performance concrete in the threaded sleeve. The bite force between the ultra-high performance concrete, the threaded sleeve and the column longitudinal reinforcement can ensure that the steel bars can transmit force reliably after connection. Therefore, the node has a high degree of prefabrication and reliable connection.

[0022] (3) Compared with the traditional wet connection or mixed connection node, since this node does not have a post-cast joint, there is no problem of easy cracking at the interface between the post-cast joint and the new and old concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the lower prefabricated column structure;

[0025] Figure 2 This is a schematic diagram of the upper prefabricated column structure;

[0026] Figure 3 This is a schematic diagram of the precast beam structure;

[0027] Figure 4 It is a structural schematic diagram of a threaded sleeve;

[0028] Figure 5 It is a structural schematic diagram of the connection of column longitudinal reinforcement in the threaded sleeve;

[0029] Figure 6 This is a schematic diagram of the structure after the lower prefabricated column and prefabricated beam are assembled;

[0030] Figure 7 It is a schematic diagram of the structure of grouting into the thread sleeve;

[0031] Figure 8 This is a structural diagram after the node construction is completed;

[0032] In the figure: 1-longitudinal reinforcement; 2-ordinary concrete; 3-threaded sleeve; 4-ultra-high performance concrete; 5-precast beam; 6-lower precast column; 7-grouting funnel; 8-upper precast column. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0034] Example

[0035] Combination Figures 1 to 8 As shown, this embodiment provides a beam-through assembled reinforced concrete beam-column node, including: an upper prefabricated column 8, a lower prefabricated column 6 and a prefabricated beam 5.

[0036] The upper precast column 8 and the lower precast column 6 are both reinforced concrete columns, which have a plurality of longitudinal bars 1 and a plurality of stirrups tied to each other, and are poured with ordinary concrete 2. The longitudinal bars 1 of the upper precast column 8 and the lower precast column 6 both extend outward at the assembly end to form an extended longitudinal bar for splicing.

[0037] The precast beam 5 is a reinforced concrete beam having a plurality of mutually bound transverse bars and a plurality of stirrups, and poured with ordinary concrete 2. The precast beam 5 is vertically penetrated with a plurality of steel sleeves at the assembly location, and ultra-high performance concrete 4 is poured into the steel sleeves; wherein the steel sleeves are preferably threaded sleeves 3 having both internal and external threads.

[0038] The outwardly extending longitudinal reinforcements of the upper precast column 8 and the lower precast column 6 are respectively inserted from both ends of the threaded sleeve 3 so that the upper precast column 8 and the lower precast column 6 are connected to the precast beam; wherein, a layer of ultra-high performance concrete 4 is laid at the splicing interface between the upper precast column 8 and the precast beam 5, and between the lower precast column 6 and the precast beam 5.

[0039] Furthermore, the number of the threaded sleeves 3, the number of the longitudinal bars of the upper precast column 8 and the number of the longitudinal bars of the lower precast column 6 are the same and correspond one to one. The extended length of the longitudinal bars 1 of the upper precast column 8 and the lower precast column 6 is less than or equal to half of the height of the threaded sleeve 3, and the length of the extended longitudinal bars is preferably half of the height of the threaded sleeve 3.

[0040] The present application further provides a construction method for a beam-through assembled reinforced concrete beam-column node, which uses a beam-through assembled reinforced concrete beam-column node as described in any one of the above, and comprises the following steps:

[0041] S1: Prefabricate the upper prefabricated column 8 and the lower prefabricated column 6. During prefabrication, the assembly ends of the upper prefabricated column 8 and the lower prefabricated column 6 are reserved with extended longitudinal reinforcement for splicing;

[0042] S2: prefabricate the prefabricated beam 5. During prefabrication, embed multiple threaded sleeves 3 at the assembly position of the prefabricated beam 5;

[0043] S3: First, a layer of ultra-high performance concrete 4 is laid on the joint interface of the lower precast column 6, the extended longitudinal reinforcement of the lower precast column 6 is inserted into the threaded sleeve 3 of the precast beam 5, and then the precast beam 5 is leveled;

[0044] S4: pouring ultra-high performance concrete 4 into the threaded sleeve 3, and the grouting funnel 7 can be used for pouring; and laying a layer of ultra-high performance concrete 4 on the splicing interface of the precast beam 5, and then slowly inserting the extended longitudinal reinforcement of the upper precast column 8 into the threaded sleeve 3; in this process, attention should be paid to whether the gap between the upper precast column 8 and the precast beam 5 is completely filled with the ultra-high performance concrete 4, and the squeezed ultra-high performance concrete should be cleaned in time. If the ultra-high performance concrete does not fill the gap, repeat the above steps;

[0045] S5: After the ultra-high performance concrete hardens and develops strength, the node assembly is completed.

[0046] The beam-through assembled reinforced concrete beam-column node proposed by the present invention has the advantages of high degree of prefabrication, convenient construction, safety and reliability, and is suitable for the reinforced concrete beam-column connection of various assembled buildings.

[0047] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A beam-through assembled reinforced concrete beam-column node, characterized in that: include: Upper precast columns, lower precast columns and precast beams; The upper precast column and the lower precast column are both reinforced concrete columns, and the reinforced concrete columns have a plurality of longitudinal bars and a plurality of stirrups that are bundled with each other. The assembly ends of the upper precast column and the lower precast column are respectively reserved with extended longitudinal bars for splicing; The precast beam is a reinforced concrete beam, which has a plurality of steel sleeves running through it in the vertical direction at the assembly position, and the steel sleeves are poured with ultra-high performance concrete; the extended longitudinal reinforcements of the upper precast column and the lower precast column are respectively inserted into the two ends of the steel sleeves, so that the upper precast column and the lower precast column are connected to the precast beam; Wherein, a layer of ultra-high performance concrete is laid on the joint interfaces between the upper prefabricated column and the prefabricated beam, and between the lower prefabricated column and the prefabricated beam.

2. A beam-through assembled reinforced concrete beam-column node according to claim 1, characterized in that: The outward extension length of the outward extension longitudinal reinforcement of the upper prefabricated column and the lower prefabricated column is less than or equal to half of the height of the reinforcement sleeve.

3. The beam-through assembled reinforced concrete beam-column node according to claim 1, characterized in that: The steel bar sleeve is a threaded sleeve having both external threads and internal threads.

4. The beam-through assembled reinforced concrete beam-column node according to claim 1, characterized in that: The prefabricated beam comprises a plurality of transverse reinforcements and stirrups which are bundled with each other.

5. A construction method for a beam-through assembled reinforced concrete beam-column node, characterized in that: Using a beam-through assembled reinforced concrete beam-column node as described in any one of claims 1 to 4, The following steps are involved: S1: Prefabricate the upper and lower prefabricated columns. During prefabrication, reserve the extended longitudinal reinforcement for splicing at the assembly ends of the upper and lower prefabricated columns; S2: prefabricate the prefabricated beams, and embed multiple steel sleeves at the assembly locations of the prefabricated beams during prefabrication; S3: First, lay a layer of ultra-high performance concrete on the splicing interface of the lower precast column, insert the extended longitudinal reinforcement of the lower precast column into the steel sleeve of the precast beam, and then level the precast beam; S4: Pour ultra-high performance concrete into the steel sleeve, lay a layer of ultra-high performance concrete on the splicing interface of the precast beam, and then slowly insert the extended longitudinal reinforcement of the upper precast column into the steel sleeve; During this process, pay attention to whether the gap between the upper precast column and the precast beam is completely filled with ultra-high performance concrete, and clean up the squeezed ultra-high performance concrete in time. If the ultra-high performance concrete does not fill the gap, repeat the above steps; S5: After the ultra-high performance concrete hardens and develops strength, the node assembly is completed.

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