Prefabricated concrete hollow frame column, vertical connection joint of prefabricated concrete hollow frame column, prefabricated concrete frame beam and assembly type concrete frame column beam joint

Abstract

The utility model discloses a precast concrete hollow frame column and a vertical connection node thereof, a precast concrete frame beam and an assembly type concrete frame column-beam node, the precast concrete hollow frame column comprises a frame column reinforcement cage and a concrete column, the reinforcement cage comprises a frame column vertical reinforcement, a frame column stirrup and a frame column bottom short steel cylinder; the bottom of the frame column vertical steel bar is welded with the outer wall of the upper part of the column bottom short steel cylinder; concrete is poured on the lower portion of the frame column reinforcement cage to form a prefabricated hollow concrete column, and frame column vertical reinforcements are partially exposed out of the upper portion of the concrete column. Precast concrete frame beam bottom steel bars extend out of precast concrete by a certain length and extend into the frame column, the end portions of the frame beam bottom steel bars are provided with bent sections, and the bent sections of the end portions of the frame beam bottom steel bars in all directions are hooped together through hoops in the frame column. And the integral connecting node of the prefabricated concrete frame structure is formed after the connecting part and the hollow inner concrete of the prefabricated frame column are poured.

Description

Technical Field

[0001] This utility model relates to the field of building engineering, and in particular to a precast concrete hollow frame column and its vertical connection node, a precast concrete frame beam and an assembled concrete frame column-beam node. Background Technology

[0002] Currently, the vertical connection of precast reinforced concrete frame columns in my country is very difficult, costly, and has poor safety. The main reasons are: Firstly, precast frame columns with seismic requirements have a large number of vertical reinforcing bars with large diameters. The vertical reinforcing bars are generally connected using grouting sleeves, but inserting them into the sleeves is extremely difficult and inefficient. Secondly, the vertical reinforcing bars are bonded and anchored in the sleeves using grout, but the anchorage length is very short, and the bonding strength of the grout is much lower than that of welded steel bars, making it difficult to guarantee against damage during a major earthquake. This leads to safety hazards in the grouting sleeve connection of the vertical reinforcing bars in frame columns. Thirdly, when the frame column is long, the weight of a single column is very large, and the vertical connection of precast frame columns also presents challenges during segmented manufacturing. On the other hand, in precast concrete frame column-beam joints with seismic requirements, the precast concrete frame beams often have a large number of bottom reinforcing bars, sometimes in two rows, with relatively large diameter bars. The anchorage length of these bottom reinforcing bars within the frame column is typically around 0.7 to 1.0 meters, which may exceed the width of the frame column cross-section. Generally, a frame column has four frame beams around it. If each frame beam has two rows of reinforcing bars at its bottom, the total number of bottom reinforcing bars for the four frame beams within the frame column is eight layers, making anchorage impossible. This results in the current outdated precast concrete frame column-beam connection technology in my country, hindering its market application. Summary of the Invention

[0003] To address this, this utility model provides a precast concrete hollow frame column and its vertical connection node, a precast concrete frame beam and an assembled concrete frame column beam node, which solves the problem of efficient overall installation of connection nodes for precast concrete frame columns and precast concrete frame beams in my country. It also solves the problem of integral vertical connection of precast concrete frame columns. It has the advantages of good integrity of the connection parts, high seismic performance, simple construction and installation, energy saving, environmental protection and low carbon emissions, and is the direction for realizing the low-carbon and green industrialization development of the construction industry.

[0004] To achieve the purpose of this utility model, the following technical solution is adopted:

[0005] A precast concrete hollow frame column includes a frame column reinforcement cage and a concrete column. The reinforcement cage includes vertical reinforcement bars, stirrups, and a short steel cylinder at the bottom of the frame column. Multiple vertical reinforcement bars are placed vertically, forming a rectangle or circle. Multiple stirrups are spaced at predetermined intervals around the vertical reinforcement bars, which are then bound together. The bottom of the vertical reinforcement bars is welded to the upper outer wall of the short steel cylinder at the bottom. Concrete is poured into the frame column reinforcement cage to form the concrete column, with a portion of the vertical reinforcement bars protruding from the top of the concrete column.

[0006] The precast concrete hollow frame column, wherein: a longitudinal hollow section is reserved in the center of the concrete column, and the hollow section runs through the upper and lower parts of the concrete column body.

[0007] The precast concrete hollow frame column, wherein the lower part of the short steel cylinder at the bottom of the column is exposed outside the bottom of the concrete column.

[0008] The precast concrete hollow frame column, wherein: the outer side of the middle part of the short steel cylinder at the bottom of the frame column has transverse ribs.

[0009] A vertical connection node for precast hollow concrete frame columns includes multiple precast hollow concrete frame columns arranged vertically as described above. The exposed vertical reinforcing bars of the lower precast hollow concrete frame column extend upwards to a certain height above the completed concrete floor. The lower end of the exposed short steel cylinder at the bottom of the upper precast hollow concrete frame column is inserted into the area enclosed by the top of the exposed vertical reinforcing bars at the top of the lower precast hollow concrete frame column. The top of the exposed vertical reinforcing bars at the top of the lower precast hollow concrete frame column is welded to the lower outer wall of the exposed short steel cylinder at the bottom of the upper precast hollow concrete frame column.

[0010] A precast concrete frame beam includes precast concrete, frame beam stirrups, and bottom reinforcement bars of the frame beam. The precast concrete encloses the frame beam stirrups and bottom reinforcement bars of the frame beam. The bottom reinforcement bars of the frame beam are arranged in multiple rows from top to bottom under the precast concrete. The ends of the bottom reinforcement bars of the frame beam extend out of the precast concrete by a certain length to form overhangs, and the ends of the overhangs have bent sections.

[0011] The precast concrete frame beam, wherein the bent section at the end of the bottom reinforcing bar of the frame beam is bent upward.

[0012] The precast concrete frame beams described herein have the following characteristics: multiple rows consist of two rows, with the upper row having an upward-bending section and the lower row having a downward-bending section.

[0013] A prefabricated concrete frame column-beam joint includes multiple prefabricated concrete frame beams as described above, and frame columns as described above; the bottom reinforcing bars of the prefabricated concrete frame beams are installed inside the frame columns, and the bent sections at the ends of the bottom reinforcing bars at the same height are bound together by hoops, and concrete is poured inside the frame column-beam joint.

[0014] The prefabricated concrete frame column-beam joint mentioned above, wherein: the hoop is a multi-turn ring-shaped hoop made of thin-diameter steel wire rope. Attached Figure Description

[0015] Figure 1 Schematic diagram of the short steel cylinder structure at the column base;

[0016] Figure 2 A schematic diagram of a steel cage formed by welding vertical reinforcing bars and stirrups of a frame column to a short steel cylinder column at the bottom of the column;

[0017] Figure 3 Schematic diagram of precast concrete hollow frame column;

[0018] Figure 4 Schematic diagram of the elevation structure of a precast concrete frame beam;

[0019] Figure 5 Section of precast concrete hollow frame column-beam connection node Figure 1 ;

[0020] Figure 6 Section of precast concrete hollow frame column-beam connection node Figure 2 ;

[0021] Figure 7 Cross-sectional view of the vertical extension connection node of the precast concrete hollow frame column;

[0022] Figure 8 Schematic diagram of vertical reinforcement connection of precast hollow frame column;

[0023] Figure 9 Cross-sectional view of the precast frame columns after installation;

[0024] Figure 10 Plan view of precast concrete frame column-beam connection node Figure 1 ;

[0025] Figure 11 Plan view of precast concrete frame column-beam connection node Figure 2 ;

[0026] Figure 12 Cross-sectional view of the completed frame beam installation;

[0027] Figure 13 Construction diagram of the hoop.

[0028] The reference numerals in the figure are explained as follows: 1. Precast hollow concrete frame column; 11. Vertical reinforcement of the frame column; 12. Stirrups of the frame column; 13. Precast column cavity; 2. Short steel cylinder at the bottom of the column; 21. Horizontal rib of the short steel cylinder; 3. First connecting weld; 4. Second connecting weld; 5. Precast concrete frame beam; 51. Stirrups of the precast frame beam; 52. Upper reinforcement of the frame beam; 6. Bottom reinforcement of the precast concrete frame beam; 61. Bent end section of the bottom reinforcement of the beam; 7. Hoop; 8. Post-cast concrete. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-12 The specific embodiments of this utility model will be described in detail.

[0030] The construction of the steel reinforcement cage for the frame column is as follows: Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 9, the BB section (cross-section) of the precast concrete hollow frame column 3 is rectangular or circular; the corresponding column base short steel cylinder 2, frame column stirrup 12 shape, and steel cage shape cross-section are also rectangular or circular. The frame column steel cage includes frame column vertical steel bars 11, frame column stirrups 12, and frame column base short steel cylinder 2; the frame column base short steel cylinder 2 has a transverse rib 21 on the outer side of the middle part, or it may not have a transverse rib 21; multiple frame column vertical steel bars 11 are placed vertically, forming a rectangle or circle; multiple frame column stirrups 12 are spaced at predetermined intervals around the multiple frame column vertical steel bars 11, enclosing and binding the multiple frame column vertical steel bars 11 into one piece; the bottom of the frame column vertical steel bars 11 is welded to the upper part of the column base short steel cylinder 2 through a first connecting weld 4; together they form a structure as shown in Figure 9. Figure 2 The steel reinforcement cage for the frame column is shown.

[0031] like Figure 2 , Figure 3 , Figure 9 As shown, concrete 1 is poured at the bottom of the frame column reinforcement cage, and the part of the frame column reinforcement cage containing concrete is encased in concrete 1; a portion of the vertical reinforcement 11 of the frame column reinforcement cage protrudes from the top of the concrete 1; a longitudinal cavity section 13 is reserved in the center of the concrete 1, the cavity section 13 penetrates the upper and lower parts of the concrete 1 body, and is used as a channel for pouring the concrete of the bottom connecting section of the frame column and for bonding the post-poured concrete and the precast concrete together; the lower part of the short steel cylinder 2 at the bottom of the column protrudes outside the concrete 1, forming a shape as shown in the figure. Figure 3 The precast concrete hollow frame column 1 shown has the following cross-sectional shape: Figure 9 The shape shown in BB is rectangular or circular. The short steel cylinder 2 at the base of the column protrudes from the bottom of the concrete 1.

[0032] like Figure 1 , Figure 9 As shown, Figure 1 The short steel cylinder 2 at the bottom of the frame column has a transverse rib 21 on the outer side of the middle part, or it may not have a transverse rib 21; Figure 1On the left is a short steel cylinder 2 with a rectangular bottom without transverse ribs, Figure 1 in the middle is a short steel cylinder 2 with a rectangular bottom with transverse ribs 21, Figure 1 on the right is a short steel cylinder 2 with a circular bottom with transverse ribs 21; when the bottom short steel cylinder 2 of the column is rectangular, as Figure 1 、 Figure 9 shown in A-A in, the plane shape of the bottom short steel cylinder 2 of the column is a "mouth" shape with two flanges extending outwards, which is convenient for accurately welding the vertical steel bars 11 of the rectangular frame column to the outer side wall of the upper section of the rectangular bottom short steel cylinder 2 of the column; when the bottom short steel cylinder 2 of the column is circular, as Figure 1 、 Figure 9 shown in A-A in, the plane shape of the bottom short steel cylinder 2 of the column is an annular shape, which is convenient for accurately welding the vertical steel 11 of the circular frame column to the outer side wall of the upper section of the circular bottom short steel cylinder 2 of the column. The first connection weld 3 can weld the vertical steel bars 11 of the frame column and the bottom short steel cylinder 2 firmly; when the cross-sectional size of the precast frame column is large, the middle of the bottom short steel cylinder 2 has transverse ribs 21; when the cross-sectional size of the precast frame column is small, the middle of the bottom short steel cylinder 2 has no transverse ribs;

[0033] As Figure 5 、 Figure 6 、 Figure 7 shown is a schematic diagram of the installation node of the frame column at the floor or the top surface of the foundation.

[0034] As Figure 5 、 Figure 6 、 Figure 7 shown, the vertical steel bars 11 of the foundation or the lower layer frame column extend a certain length out of the top of the foundation or the floor surface. After installing the precast concrete beam 5 on the floor, the vertical steel bars 11 of the frame column extend a certain height upwards from the completed concrete floor surface. Lift the precast concrete hollow frame column 1 prefabricated in the factory as Figure 3 shown. From the upper part downwards, insert the lower end of the exposed bottom short steel cylinder 2 at the lower end of the precast concrete hollow frame column 1 into the inner side of the range enclosed by the top ends of the vertical steel bars 11 of the foundation or the lower layer frame column. Through the second connection weld 4, weld and connect the top ends of the vertical steel bars 11 of the frame column and the lower outer side wall of the bottom short steel cylinder 2. The vertical steel bars 11 of the frame column are reliably connected to the bottom short steel cylinder 2 through the second connection weld 3, forming a continuous connection of the vertical steel bars of the precast frame column up and down.

[0035] As Figure 7 、 Figure 8 shown, when the frame column is relatively long, its self-weight is very large and it is difficult to hoist and transport. The relatively long frame column can be prefabricated in sections into precast concrete hollow frame columns in the factory and connected into a relatively long frame column at the construction site as Figure 7 shown. As Figure 7 、 Figure 8As shown, the vertical reinforcing bars 11 of the next precast hollow frame column extend a certain length beyond the top surface of the precast concrete; the previous precast hollow concrete frame column 1 is lifted up, and from top to bottom, the lower end of the exposed column bottom short steel cylinder 2 at the lower end of the previous precast hollow concrete frame column 1 is inserted into the inner side of the area enclosed by the top of the vertical reinforcing bars 11 of the next precast hollow concrete frame column. Through the second connecting weld 3, the top of the vertical reinforcing bars 11 of the next precast hollow concrete frame column is welded to the lower part of the bottom short steel cylinder 2 of the previous precast hollow concrete frame column; the vertical reinforcing bars of the precast hollow concrete frame column are connected vertically.

[0036] like Figure 4 As shown, the precast concrete frame beam includes precast concrete 5, frame beam stirrups 51, and frame beam bottom reinforcement 6. The precast concrete 5 encloses the frame beam stirrups 51 and frame beam bottom reinforcement 6. The frame beam bottom reinforcement 6 is located at the bottom of the precast concrete beam 2, and can be one row or two rows. Figure 4 As shown in the two rows; the bottom reinforcing bars 6 of the frame beam extend a certain length beyond the precast concrete 5, with a bent section 61 at the end, as shown. Figure 4 As shown in the diagram above, the end bend 61 is generally bent upwards. However, if it is inconvenient to install the two rows of reinforcing bars at the bottom of the beam if the end bend 61 is bent upwards, an alternative method can be used. Figure 4 The figure below shows the shape of the upper bend section 61 of the two rows of steel bars at the bottom of the beam, which bends upward and the lower bend section 61 bends downward.

[0037] like Figure 5 , Figure 10 , Figure 11 , Figure 12 As shown, the extended section of the bottom reinforcement 6 of the precast concrete frame beam is installed inside the extended section of the upper reinforcement of the frame column 1. The bent sections 61 of the bottom reinforcement of multiple precast concrete frame beams at the same height correspond to each other. The bottom reinforcement 61 of the frame beams in each direction inside the frame column is bent upward and interlocked with each other using a hoop 7, so that the bottom reinforcement of the precast concrete frame beams is connected to each other at the frame column node. Then, the frame column hoop 12 and the upper reinforcement 52 of the precast concrete frame beam are installed. The upper reinforcement 52 of the concrete frame beam passes directly through the frame column. Then, the concrete 8 inside the frame column beam node is poured to form an integrated precast concrete frame column beam node. The overall performance of the node connection is equivalent to that of the cast-in-place frame structure node.

[0038] like Figure 4 , Figure 6As shown, the extended sections of the bottom reinforcing bars of the precast concrete frame beam are installed inside the frame column 1. The bent sections 61 of the bottom reinforcing bars 6 of the upper frame beam are bent upwards, and the bent sections 61 of the bottom reinforcing bars 61 of the lower frame beam are bent downwards. The lower bottom reinforcing bars 61 of the frame beams in each direction inside the frame column are interlocked with the sleeves 7, forming a single unit. The upper bottom reinforcing bars 61 of the frame beams in each direction inside the frame column are interlocked with the sleeves 7, forming a single unit. This allows the bottom reinforcing bars of the precast concrete frame beams to be connected to each other at the frame column joint. Then, the frame column stirrups 12 and the upper reinforcing bars 52 of the precast concrete frame beams are installed, and then the concrete 8 inside the frame column beam joint is poured, forming an integrated precast concrete frame column beam joint. The overall performance of the joint connection is equivalent to that of the cast-in-place frame structure joint.

[0039] like Figure 9 Figure AA shows the relative relationship between the vertical reinforcing bar 12 of the frame column and the short steel cylinder 2 at the bottom of the column welded together; as shown in Figure AA. Figure 9 Figure BB shows the cross-section of the solid structural frame column formed after the precast hollow frame column is installed and the concrete is poured.

[0040] like Figure 12 The image shown is a CC section view after the frame beams have been installed.

[0041] like Figure 13 As shown, the clamp 7 is a thin-diameter steel wire rope wound into a multi-turn loop, and DD on the right is a cross-sectional view of the clamp.

[0042] After that, as Figure 5 , Figure 6 As shown, the precast concrete beams and precast frame columns of the next floor are installed in a cyclical manner. The floor and frame column connection sections are then poured with post-cast concrete 8. The post-cast concrete 8 fills the cavity 13 of the precast hollow frame column and the frame column connection section, forming a precast concrete frame structure node with good integrity.

Claims

1. A precast concrete hollow frame column, comprising a frame column reinforcement cage and a concrete column, characterized in that: The reinforcing cage includes vertical reinforcing bars for the frame columns, stirrups for the frame columns, and a short steel cylinder at the bottom of the frame columns. Multiple vertical reinforcing bars for the frame columns are placed vertically to form a rectangle or circle. Multiple stirrups for the frame columns are spaced at predetermined intervals and looped around the multiple vertical reinforcing bars for the frame columns. The multiple vertical reinforcing bars for the frame columns are tied together to form a whole. The bottom of the vertical reinforcing bars for the frame columns is welded to the upper outer wall of the short steel cylinder at the bottom of the column. Concrete is poured into the reinforcing cage for the frame columns to form a concrete column. A portion of the vertical reinforcing bars for the frame columns in the reinforcing cage protrudes from the top of the concrete column.

2. The precast concrete hollow frame column according to claim 1, characterized in that: A longitudinal hollow section is reserved in the center of the concrete column, and the hollow section runs through the upper and lower parts of the concrete column body.

3. The precast concrete hollow frame column according to claim 1, characterized in that: The lower part of the short steel cylinder at the bottom of the column is exposed outside the bottom of the concrete column.

4. The precast concrete hollow frame column according to claim 1, characterized in that: The short steel cylinder at the bottom of the frame column has transverse ribs on the outer side of the middle section.

5. A vertical connection node for precast concrete hollow frame columns, characterized in that: The system includes multiple precast concrete hollow frame columns arranged vertically as described in any one of claims 1-4. The exposed vertical reinforcing bars of the lower precast concrete hollow frame column extend upwards to a certain height above the completed concrete floor. The lower end of the exposed short steel cylinder at the bottom of the upper precast concrete hollow frame column is inserted into the area enclosed by the top of the exposed vertical reinforcing bars at the top of the lower precast concrete hollow frame column. The top of the exposed vertical reinforcing bars at the top of the lower precast concrete hollow frame column is welded to the lower outer wall of the exposed short steel cylinder at the bottom of the upper precast concrete hollow frame column.

6. A precast concrete frame beam, characterized in that: It includes precast concrete, frame beam stirrups and frame beam bottom reinforcement. The precast concrete wraps around the frame beam stirrups and frame beam bottom reinforcement. The frame beam bottom reinforcement is set at the bottom of the precast concrete, with multiple rows from top to bottom. The ends of the frame beam bottom reinforcement extend out of the precast concrete to form overhangs, and the ends of the overhangs have bends.

7. The precast concrete frame beam according to claim 6, characterized in that: The bent sections at the ends of the bottom reinforcing bars of the frame beam are bent upwards.

8. The precast concrete frame beam according to claim 6, characterized in that: The multiple rows consist of two rows, with the upper row's bent section bending upwards and the lower row's bent section bending downwards.

9. A prefabricated concrete frame column-beam joint, characterized in that: It includes multiple precast concrete frame beams as described in any one of claims 6-7, and frame columns as described in any one of claims 1-4; the bottom reinforcing bars of the precast concrete frame beams are installed inside the frame columns, and the bent sections at the ends of the bottom reinforcing bars at the same height are bound together by hoops, and concrete is poured into the beam-column joint.

10. The prefabricated concrete frame column-beam joint according to claim 9, characterized in that: The ferrule is made of thin-diameter steel wire rope wound into a multi-turn loop.

Images