Structural node for hanging secondary beam below cantilever beam end

Abstract

The utility model provides a construction node for hanging a secondary beam below a cantilever beam end, which is characterized in that a pair of reinforced concrete hanging columns are symmetrically hung at the tail end of a reinforced concrete cantilever beam plate, and a reinforced concrete secondary beam is hung below the pair of reinforced concrete hanging columns; davit hanging bars of the reinforced concrete davit are in lap joint with cantilever beam tensile bars of the reinforced concrete cantilever beam plate and secondary beam stress bars of the reinforced concrete secondary beam respectively, and the lap joints are connected in a welded mode; the davit hanging bars of the reinforced concrete davits on the two sides are equal in height and staggered in the front-back direction, the horizontal parts of the davit hanging bars are in lap joint, the secondary beam stress bars are erected between the closed ends of the vertical parts of the davit hanging bars on the two sides, and the lap joint positions are welded; the top tension steel bar of the cantilever beam extends to the bottom ends of the horizontal parts of the hanging column hanging bars on the two sides to form lap joint and is exposed out of the hanging column hanging bars, and the lap joint position is welded. Reasonable force transmission of the cantilever end can be guaranteed, and the stress performance of the reinforced concrete cantilever structure is improved.

Description

Technical Field

[0001] The utility model relates to the field of construction, in particular to a structural node for hanging a secondary beam under the end of a cantilever beam. Background Art

[0002] In the process of building reinforced concrete structures, it is often necessary to cantilever certain parts from the main structure to form a cantilever structure. At the cantilever end, such as the equipment platform, it is often necessary to set a cantilever secondary beam at the end to bear the load due to the upper load or the lower load. The size of the secondary beam cannot be designed to be too large, because the deadweight of the secondary beam will also significantly increase the load of the cantilever beam. Based on this, a structural node with a secondary beam hanging under the cantilever beam end is designed. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes a structural node with a secondary beam hanging under the cantilever beam end, which can reduce construction costs, ensure reasonable force transmission at the cantilever end, and improve the force performance of the reinforced concrete cantilever structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A structural node with a secondary beam hanging below the end of a cantilever beam, the structural features of which are:

[0006] A pair of reinforced concrete hanging columns are symmetrically installed at the ends of the reinforced concrete cantilever beam slab, and a reinforced concrete secondary beam is hung between the pair of reinforced concrete hanging columns, with the length direction of the secondary beam as the left and right direction;

[0007] The column suspension bars of the reinforced concrete suspension column are overlapped with the cantilever beam tension steel bars of the reinforced concrete cantilever beam slab and the secondary beam tension bars of the reinforced concrete secondary beam, and the overlaps are welded and connected;

[0008] The tension reinforcement of the cantilever beam includes the tension reinforcement at the top of the cantilever beam and the tension reinforcement at the bottom of the cantilever beam. Multiple cantilever beam stirrups are hooped between the tension reinforcement at the top of the cantilever beam and the tension reinforcement at the bottom of the cantilever beam. The hanger bar of the suspended column includes a vertical part in the reinforced concrete suspended column in a "C" shape, and also includes a horizontal part extending into the reinforced concrete cantilever slab. The opening end of the vertical part faces vertically upward, and the horizontal part is formed by horizontally bending from both sides of the opening end. The hanger bars of the suspended columns on both sides are at the same height and are staggered in the front-back direction. The horizontal parts overlap with each other, and the overlapping part is welded. The hanger bars of the suspended columns on both sides together form a "C" shaped integral structure with the opening end facing vertically downward. Each side of the hanger bar of the suspended column is hooped with multiple suspended column stirrups. The secondary beam stress reinforcement is arranged along the entire length of the secondary beam, with two in the front and back. It is laid between the closed ends of the vertical parts of the hanger bars of the suspended columns on both sides, extends outside a pair of hanger bars of the suspended columns, and the overlapping part is welded. The tension reinforcement at the top of the cantilever beam extends along the width direction of the secondary beam, respectively extends to form an overlap with the bottom ends of the horizontal parts of the hanger bars of the suspended columns on both sides, and is exposed outside the hanger bars of the suspended columns, and the overlapping part is welded.

[0009] The structural features of the present utility model also lie in:

[0010] The cantilever beam stirrups are densely arranged at intervals of 50 mm.

[0011] The suspended column stirrups are densely arranged at intervals of 50 mm.

[0012] Between the horizontal parts of the hanger bars of the suspended columns on both sides of the reinforced concrete suspended columns, the overlapping length is not less than 10 times the diameter of the hanger bar of the suspended column.

[0013] Compared with the prior art, the beneficial effects of the present utility model are reflected in:

[0014] In the present utility model, reinforced concrete suspended columns are arranged at both ends of the reinforced concrete cantilever slab to hang a reinforced concrete secondary beam. The hanger bar of the suspended column of the reinforced concrete suspended column forms a horizontal part and a vertical part through bending. The horizontal part hoops the longitudinal stress reinforcement of the reinforced concrete cantilever slab at the upper part and hangs the full-length secondary beam stress reinforcement of the reinforced concrete secondary beam at the lower part. The horizontal parts of the hanger bars on both sides are effectively overlapped. This connection method can better control the size of the secondary beam, save construction materials, and at the same time ensure the reasonable force transmission at the cantilever end, ensure the integrity of the structure, and effectively improve the stress performance of the reinforced concrete cantilever structure. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the present utility model;

[0016] Figure 2 is the sectional structural schematic diagram of the present utility model;

[0017] Figure 3 is the schematic diagram of the positional relationship among the hanger bar of the suspended column, the secondary beam stress reinforcement, and the tension reinforcement at the top of the cantilever beam.

[0018] In the figure, 1 is a reinforced concrete cantilever beam and slab; 11 is the tensile reinforcement at the top of the cantilever beam; 12 is the tensile reinforcement at the bottom of the cantilever beam; 13 is the stirrup of the cantilever beam; 2 is a reinforced concrete suspension column; 21 is the suspension bar of the suspension column, including 211 vertical part and 212 horizontal part; 22 is the stirrup of the suspension column; 3 is a reinforced concrete secondary beam; 31 is the stress-bearing reinforcement of the secondary beam. Specific implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 to 3 , and the structural node of the secondary beam hanging under the end of the cantilever beam in this embodiment is arranged as follows:

[0021] A pair of reinforced concrete suspension columns 2 are symmetrically hoisted at the end of the reinforced concrete cantilever beam and slab 1, and a reinforced concrete secondary beam 3 is hung between the pair of reinforced concrete suspension columns 2, with the length direction of the secondary beam as the left-right direction;

[0022] The suspension bars 21 of the reinforced concrete suspension columns 2 are respectively lapped with the tensile reinforcement of the cantilever beam of the reinforced concrete cantilever beam and slab 1 and the stress-bearing reinforcement 31 of the reinforced concrete secondary beam 3, and are welded together at the lap joints;

[0023] The tensile reinforcement of the cantilever beam includes the tensile reinforcement 11 at the top of the cantilever beam and the tensile reinforcement 12 at the bottom of the cantilever beam. Multiple stirrups 13 of the cantilever beam are hooped between the tensile reinforcement 11 at the top of the cantilever beam and the tensile reinforcement 12 at the bottom of the cantilever beam; the suspension bar 21 of the suspension column includes a vertical part 211 in the shape of a "C" inside the reinforced concrete suspension column 2, and also includes a horizontal part 212 extending into the reinforced concrete cantilever beam and slab 1. The opening end of the vertical part 211 is vertically upward, and the horizontal part 212 is formed by horizontally bending from both sides of the opening end. The suspension bars 21 of the two-sided reinforced concrete suspension columns 2 are at the same height and are staggered in the front-back direction. The horizontal parts 212 are lapped with each other and welded at the lap joints. The suspension bars 21 on both sides together form a "C" - shaped integral structure with the opening end vertically downward, and each side of the suspension bar 21 of the suspension column is hooped with multiple stirrups 22 of the suspension column; the stress-bearing reinforcement 31 of the secondary beam is arranged along the full length of the secondary beam, with two front and rear ones, and is lapped between the closed ends of the vertical parts 211 of the suspension bars 21 on both sides, extending outside the pair of suspension bars 21 of the suspension column, and welded at the lap joints; the tensile reinforcement 11 at the top of the cantilever beam extends along the width direction of the secondary beam, respectively extending to form a lap with the bottom ends of the horizontal parts 212 of the suspension bars 21 on both sides and protruding outside the suspension bars 21 of the suspension column, and welded at the lap joints.

[0024] In the specific implementation, the corresponding structural settings also include:

[0025] The cantilever beam stirrups 13 are densely distributed at intervals of 50 mm.

[0026] The column stirrups 22 are densely distributed at intervals of 50 mm.

[0027] The lap length between the horizontal parts 212 of the column suspension bars 21 of the reinforced concrete columns 2 on both sides is not less than 10 times the diameter of the column suspension bars 21 .

[0028] During construction, you can refer to the following methods:

[0029] a. The reinforced concrete cantilever beam 1 is hung with reinforced concrete columns 2 at both ends of the cantilever beam, and the steel bars are tied and then the formwork is supported and cast as a whole;

[0030] b. The cantilever beam reinforcement consists of longitudinal force bars (divided into cantilever beam top tension bars 11 and cantilever beam bottom tension bars 12) and cantilever beam stirrups 13. The cantilever beam stirrups 13 are densely arranged at a spacing of 50 mm to tie the cantilever beam top tension bars 11 and cantilever beam bottom tension bars 12 together. The suspension column reinforcement consists of suspension column stirrups 22 and suspension column suspension bars 21. The suspension column stirrups 22 are densely arranged at a spacing of 50 mm to tie the suspension column suspension bars 21 together.

[0031] c. The secondary beam stress reinforcement 31 of the reinforced concrete secondary beam 3 is arranged along the bottom of the beam length. The suspension column suspension reinforcement 21 is a bent structure. The longitudinal stress reinforcement of the reinforced concrete cantilever beam slab 1 is clamped at the upper part through the horizontal part 212, and the full-length secondary beam stress reinforcement 31 of the reinforced concrete secondary beam 3 is suspended at the lower part, and fixed by spot welding on site;

[0032] d. The horizontal parts 212 of the suspension bars 21 on both sides need to be effectively overlapped, and the overlap length should not be less than 10 times the diameter of the suspension bar 21.

[0033] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A structural joint of a secondary beam hanging below the end of a cantilever beam, characterized in that: A pair of reinforced concrete suspension columns are symmetrically hoisted at the end of the reinforced concrete cantilever beam slab, and a reinforced concrete secondary beam is hung between the pair of reinforced concrete suspension columns, with the length direction of the secondary beam being the left - right direction; The suspension bar of the suspension column of the reinforced concrete suspension column is respectively lapped with the tensile reinforcement of the cantilever beam of the reinforced concrete cantilever beam slab and the stress - bearing reinforcement of the secondary beam of the reinforced concrete secondary beam, and the lapping parts are welded together; The tensile reinforcement of the cantilever beam includes the tensile reinforcement at the top of the cantilever beam and the tensile reinforcement at the bottom of the cantilever beam. Multiple cantilever beam stirrups are hooped between the tensile reinforcement at the top of the cantilever beam and the tensile reinforcement at the bottom of the cantilever beam; The suspension bar of the suspension column includes a vertical part in the shape of "匚" inside the reinforced concrete suspension column, and also includes a horizontal part extending into the reinforced concrete cantilever beam slab. The opening end of the vertical part is vertically upward, and the horizontal part is formed by horizontally bending from both sides of the opening end. The suspension bars of the suspension columns on both sides are at the same height and are staggered in the front - back direction. The horizontal parts are lapped with each other, and the lapping part is welded. The suspension bars of the suspension columns on both sides together form a "匚" - shaped overall structure with the opening end vertically downward. Each side of the suspension bar of the suspension column is hooped with multiple suspension column stirrups; The stress - bearing reinforcement of the secondary beam is arranged along the full length of the secondary beam, with two front - back ones. It is lapped between the closed ends of the vertical parts of the suspension bars of the suspension columns on both sides, extends outside the pair of suspension bars of the suspension columns, and the lapping part is welded; The tensile reinforcement at the top of the cantilever beam extends along the width direction of the secondary beam, respectively extends to form a lap with the bottom ends of the horizontal parts of the suspension bars of the suspension columns on both sides, and protrudes outside the suspension bars of the suspension columns, and the lapping part is welded.

2. The structural node of the cantilever beam end hanging secondary beam according to claim 1 is characterized in that: The cantilever beam stirrups are densely arranged at an interval of 50 mm.

3. The structural node of the cantilever beam end hanging secondary beam according to claim 1 is characterized in that: The suspension column stirrups are densely arranged at an interval of 50 mm.

4. The structural node of the cantilever beam end hanging secondary beam according to claim 1 is characterized in that: Between the horizontal parts of the suspension bars of the suspension columns of the reinforced concrete suspension columns on both sides, the lap length is not less than 10 times the diameter of the suspension bar of the suspension column.

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