Beam-column joint connecting structure of full-fabricated prestressed concrete frame structure

Abstract

The utility model discloses a beam-column joint connecting structure of a full-fabricated prestressed concrete frame structure. Comprising a prefabricated concrete frame column, a prefabricated concrete frame beam, prestressed steel strands, prestressed finish-rolled twisted steel bars, a retarding adhesive, steel pipes, column prestressed steel strand hole channels, column prestressed finish-rolled twisted steel bar hole channels, beam prestressed steel strand hole channels and beam prestressed finish-rolled twisted steel bar hole channels. The prefabricated concrete frame columns and the prefabricated concrete frame beams are connected through the joint grouting materials, the prestressed steel strands and the prestressed finish-rolled twisted steel bars to form a frame structure, the integrity and the anti-seismic property of beam-column joints are effectively improved, and the full-length reinforcing pipes are arranged on the peripheries of the prestressed twisted steel bars at the joints. The steel pipes serve as stress steel to provide shear bearing capacity of beam-column joints, and meanwhile, the steel pipes replace common steel bars, so that the purposes that the anti-seismic ductility of the joints is improved, and the section of the beam-column joints meets the joint prestress strength ratio are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated buildings, and in particular to a beam-column node connection structure of a fully prefabricated prestressed concrete frame structure. Background Art

[0002] In prefabricated building structures, the connection structure and connection method of prefabricated beam-column nodes have a crucial impact on their seismic performance and construction efficiency. In the existing construction technology of prefabricated concrete frame structures, most prefabricated beam-column nodes are connected by cast-in-place. Although this method can ensure the integrity and good seismic performance of the structure, its construction process is complicated, there are many wet operations on site, and the construction efficiency cannot be significantly improved. In the existing technology, the shear strength of the node connection is low, and the prestress strength ratio does not meet the requirements. Summary of the invention

[0003] The embodiments of the present specification provide a fully assembled prestressed concrete frame structure beam-column node connection structure, which is used to solve the problems in the prior art of low shear strength at the node connection, unsatisfactory prestress strength ratio, and disadvantageous construction safety and efficiency.

[0004] The technical solutions provided by the embodiments of this specification are:

[0005] The embodiment of the present application provides a fully assembled prestressed concrete frame structure beam-column node connection structure, comprising:

[0006] A precast concrete frame column, which is provided with a column prestressed steel strand hole and a column prestressed fine-rolled threaded steel bar hole running through both sides, wherein the column prestressed fine-rolled threaded steel bar hole is arranged below the column prestressed steel strand hole;

[0007] A precast concrete frame beam, which is provided with a beam prestressed steel strand hole and a beam prestressed fine-rolled threaded steel bar hole passing through both ends, the beam prestressed steel strand hole corresponds to the column prestressed steel strand hole, and the beam prestressed fine-rolled threaded steel bar hole corresponds to the column prestressed fine-rolled threaded steel bar hole;

[0008] Among them, precast concrete frame beams are symmetrically connected on both sides of the precast concrete frame column, and prestressed steel strands are provided in both the prestressed steel strand holes of the beams and the prestressed steel strand holes of the columns; reinforcing tubes are provided in both the prestressed fine-rolled threaded steel bar holes of the beams and the prestressed fine-rolled threaded steel bar holes of the columns, and prestressed fine-rolled threaded steel bars are provided in the reinforcing tubes.

[0009] Furthermore, a retarder is provided between the reinforcing tube and the prestressed precision-rolled threaded steel bar.

[0010] Furthermore, the reinforcement pipe comprises a steel pipe.

[0011] Furthermore, the precast concrete frame beam is a horizontally arranged variable-section beam, one section is a rectangular section section, and the other section is an I-section section section. The prestressed steel strand hole of the beam passes through both ends of the precast concrete frame beam, and the prestressed fine-rolled threaded steel bar hole of the beam passes through the rectangular section section.

[0012] Furthermore, the prestressed steel strands include straight line types or curved line types arranged in the longitudinal positions corresponding to the webs of the I-shaped cross-section segments and the rectangular cross-section segments.

[0013] Furthermore, the precast concrete frame columns include corbel columns, hidden corbel columns or corbel-free columns.

[0014] Furthermore, the precast concrete frame beam is designed as a notched beam or a non-notched beam.

[0015] At least one of the above-mentioned technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: the precast concrete frame columns and precast concrete frame beams are connected by joint grouting materials, prestressed steel strands and prestressed fine-rolled threaded steel bars to form a frame structure, which effectively improves the integrity and seismic performance of the beam-column nodes, and a full-length reinforcement tube is provided on the periphery of the prestressed threaded steel bars at the nodes, which not only serves as a load-bearing steel material to provide shear bearing capacity for the beam-column joints, but also replaces the role of ordinary steel bars, thereby achieving the purpose of improving the seismic ductility of the nodes and ensuring that the cross-section of the beam-column joints meets the prestressed strength ratio of the joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the structure of this patent;

[0018] Figure 2 This is a schematic diagram of the structure of the precast concrete frame column of this patent;

[0019] Figure 3 This is a schematic diagram of the structure of the prefabricated concrete frame beam of this patent;

[0020] Figure 4 It is the front view of the precast concrete frame beam-column node with a joint width between 30-50mm;

[0021] Figure 5 It is the front view of the precast concrete frame beam-column node with a joint width greater than 50mm;

[0022] Figure 6 for Figure 4A schematic diagram of the partially enlarged structure of the center beam-column connection node area;

[0023] Figure 7 for Figure 5 A schematic diagram of the partially enlarged structure of the center beam-column connection node area;

[0024] Figure 8 for Figure 4 Schematic diagram of the structure of the AA section;

[0025] Fig. 9 for Figure 5 Schematic diagram of the structure of the AA section;

[0026] Fig.10 for Figure 4 and Figure 5 Schematic diagram of the structure of the middle BB section;

[0027] Fig.11 for Figure 4 and Figure 5 Structural diagram of the middle CC section;

[0028] Fig.12 for Figure 4 and Figure 5 Schematic diagram of the structure of the DD section. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0030] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0031] The embodiment of this specification provides a fully assembled prestressed concrete frame structure beam-column node connection structure, please refer to Figure 1-12 As shown, it includes a precast concrete frame column 1, a precast concrete frame beam 2, a prestressed steel strand 3 and a prestressed fine-rolled threaded steel bar 4, as shown in FIG. Figure 2 As shown, the prestressed concrete frame column 1 can be prefabricated layer by layer or multi-layered, and is provided with longitudinal reinforcement and stirrups. Precast concrete frame beams 2 are provided on both sides thereof, and the precast concrete frame column and the precast concrete frame beam 2 are provided with column prestressed steel strand holes 11 and column prestressed fine-rolled threaded steel bar holes 12 at corresponding positions respectively;

[0032] like Figure 3As shown, the precast concrete frame beam 2 is a horizontally arranged variable cross-section beam, which is provided with longitudinal reinforcement, structural reinforcement and stirrups, with rectangular cross-section sections 13 at both ends and an I-section section 14 in the middle of the span, and beam prestressed steel strand holes 17 are opened through the beam body, and beam prestressed fine-rolled threaded steel bar holes 18 are opened through the rectangular cross-section sections 13 at both ends. The beam prestressed steel strand holes 17 are arranged corresponding to the longitudinal positions of the web of the I-section section 14 and the rectangular cross-section section 13, and the beam prestressed fine-rolled threaded steel bar holes 18 are provided with four groups, and the four groups of holes are adjacent to the wing of the I-section section 14 and symmetrical about the web of the I-section section 14;

[0033] The column prestressed steel strand hole 11 and the beam prestressed steel strand hole 17 and the column prestressed fine-rolled threaded steel bar hole 12 and the beam prestressed fine-rolled threaded steel bar hole 18 on both sides of the joint of the precast concrete frame column 1 and the precast concrete frame beam 2 are aligned accordingly and connected through the prestressed steel strand hole connecting pipe 5 and the prestressed fine-rolled threaded steel bar hole connecting pipe 6, respectively, and the two are bonded and fixed at the joint position by the joint grouting material 7;

[0034] The prestressed steel strand 3 is passed through the connected column prestressed steel strand hole 11 and the beam prestressed steel strand hole 17. The prestressed fine-rolled threaded steel bar is first inserted into the steel pipe 10, and the slow-setting adhesive 9 is poured into the steel pipe 10. Then the prestressed fine-rolled threaded steel bar and the steel pipe are passed through the connected column prestressed fine-rolled threaded steel bar hole 12 and the beam prestressed fine-rolled threaded steel bar hole 18, and are tensioned and fixed by anchors at the ends of the holes. The corresponding holes are tightly sealed by the hole grouting material 8, and the prestressed steel strand 3 and the prestressed fine-rolled threaded steel bar 4 are crimped and connected to the precast concrete frame column 1 and the precast concrete frame beam 2.

[0035] The prestressed steel strand 3 is arranged in a straight line or a curved line. In this embodiment, it is arranged in a curved line. At this time, its arrangement line bends upward at the precast concrete frame column 1 and bends downward at the mid-span of the precast concrete frame beam 2. The prestressed precision-rolled threaded steel bar 4 is arranged in a straight line, and its two ends are respectively anchored on the end surface of the rectangular cross-section segment 13 located in the abdominal cavity of the I-shaped cross-section segment 14;

[0036] The joint width between the precast concrete frame beam 2 and the precast concrete frame column 1 is determined according to the structural design calculation and the on-site construction conditions. When the joint width is between 30-50 mm, no additional longitudinal reinforcement and stirrups are required in the joint. In order to facilitate the installation of the prestressed steel strand channel connecting pipe 5 and the prestressed fine-rolled threaded steel bar channel connecting pipe 6, when the designed joint width is greater than 50 mm, the longitudinal reinforcement inside the precast concrete frame beam 2 needs to extend to the outside of the rectangular cross-section section 13 to form the longitudinal reinforcement 15, and the extension section of the longitudinal reinforcement 15 needs to be provided with dense stirrups 16. The number and spacing of the dense stirrups 16 required at the end of the precast concrete frame beam 2 are calculated according to the structural design, and the stirrups should be appropriately dense;

[0037] According to the shear effect of the beam-column joint, the precast concrete frame column 1 can be designed as a corbel column, a hidden corbel column or a corbel-free column;

[0038] According to the shear force transmission mode between beams and columns, the precast concrete frame beam 2 can be designed as a notched beam or a non-notched beam cross-section;

[0039] To ensure the effect of hole reservation, the column prestressed steel strand hole 11, the beam prestressed steel strand hole 17, the column prestressed fine-rolled threaded steel bar hole 12 and the beam prestressed fine-rolled threaded steel bar hole 18 are all reserved by pre-buried corrugated pipes, and the pre-buried corrugated pipes, the prestressed steel strand hole connecting pipes 5 and the prestressed fine-rolled threaded steel bar hole connecting pipes 6 are all made of metal bellows or plastic bellows.

[0040] In this embodiment, a full-length reinforcement tube is provided on the periphery of the prestressed threaded steel bars at the nodes, which not only serves as a load-bearing steel material to provide shear bearing capacity for the beam-column joints, but also replaces the role of ordinary steel bars, thereby achieving the purpose of improving the seismic ductility of the nodes and ensuring that the cross-section of the beam-column joints meets the prestressed strength ratio of the joints.

[0041] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0042] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A fully assembled prestressed concrete frame structure beam-column node connection structure, characterized in that: include: A precast concrete frame column, which is provided with a column prestressed steel strand hole and a column prestressed fine-rolled threaded steel bar hole running through both sides, wherein the column prestressed fine-rolled threaded steel bar hole is arranged below the column prestressed steel strand hole; A precast concrete frame beam, which is provided with a beam prestressed steel strand hole and a beam prestressed fine-rolled threaded steel bar hole passing through both ends, the beam prestressed steel strand hole corresponds to the column prestressed steel strand hole, and the beam prestressed fine-rolled threaded steel bar hole corresponds to the column prestressed fine-rolled threaded steel bar hole; Among them, precast concrete frame beams are symmetrically connected on both sides of the precast concrete frame column, and prestressed steel strands are provided in both the prestressed steel strand holes of the beams and the prestressed steel strand holes of the columns; reinforcing tubes are provided in both the prestressed fine-rolled threaded steel bar holes of the beams and the prestressed fine-rolled threaded steel bar holes of the columns, and prestressed fine-rolled threaded steel bars are provided in the reinforcing tubes.

2. A fully assembled prestressed concrete frame structure beam-column node connection structure according to claim 1, characterized in that: A retarder is provided between the reinforcement tube and the prestressed precision-rolled threaded steel bar.

3. A fully assembled prestressed concrete frame structure beam-column node connection structure according to claim 1, characterized in that: The reinforcement pipe includes a steel pipe.

4. A fully assembled prestressed concrete frame structure beam-column node connection structure according to claim 1, characterized in that: The precast concrete frame beam is a horizontally arranged variable-section beam, one section of which is a rectangular section section and the other section is an I-section section section. The prestressed steel strand hole of the beam passes through both ends of the precast concrete frame beam, and the prestressed fine-rolled threaded steel bar hole of the beam passes through the rectangular section section.

5. A fully assembled prestressed concrete frame structure beam-column node connection structure according to claim 1, characterized in that: The prestressed steel strands are arranged in a straight line or a curved line corresponding to the longitudinal positions of the web of the I-shaped cross-section segment and the rectangular cross-section segment.

6. A fully assembled prestressed concrete frame structure beam-column node connection structure according to claim 1, characterized in that: The precast concrete frame columns include corbel columns, hidden corbel columns or corbel-free columns.

7. A fully assembled prestressed concrete frame structure beam-column node connection structure according to claim 1, characterized in that: The precast concrete frame beam is designed as a notched beam or a non-notched beam.

Images