CN210887572U - Mixed reinforcement embedded low-prestress dry beam-column joint - Google Patents
Mixed reinforcement embedded low-prestress dry beam-column joint Download PDFInfo
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- CN210887572U CN210887572U CN201920176484.3U CN201920176484U CN210887572U CN 210887572 U CN210887572 U CN 210887572U CN 201920176484 U CN201920176484 U CN 201920176484U CN 210887572 U CN210887572 U CN 210887572U
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Abstract
The utility model relates to a bury formula low prestressing force dry-type beam column node in mixed arrangement of reinforcement, including precast concrete post, precast concrete roof beam, ordinary reinforcing bar and prestressing tendons, the both sides of precast concrete post are equipped with precast concrete roof beam respectively, precast concrete roof beam includes the first roof beam body and the second roof beam body that the segmentation was arranged, the mixed arrangement of reinforcement of ordinary reinforcing bar and prestressing tendons is all adopted to precast concrete roof beam top and bottom longitudinal reinforcement, the prestressing tendons is low prestressing force level low relaxation steel strand wires that excels in, the prestressing tendons middle part sets up coating smooth round sleeve, bury the stiff end in the adoption of prestressing tendons head end, ordinary reinforcing bar passes first roof beam body, precast concrete post and second roof beam body in proper order and with precast concrete post and precast concrete roof beam fixed connection. The utility model discloses can adopt more efficient method to carry out the on-the-spot assembly on the basis of guaranteeing node wholeness and anti-seismic performance, reduce the wet work volume in scene, reduce and shake back repair cost.
Description
Technical Field
The utility model belongs to the technical field of civil construction, concretely relates to bury formula low prestressing force dry-type beam column node in mixed arrangement of reinforcement.
Background
The prefabricated concrete structure has the advantages of high industrialization degree, material saving, small pollution, convenient construction, small field wet operation amount, small number of workers, convenient control of prefabricated part quality, short construction period, quick investment recovery and the like, and is the direction of the novel building industrialization development. For the fabricated concrete structure, the integrity, the anti-seismic performance and the construction efficiency of the node are the keys for the popularization and the application of the fabricated structure.
At present, the assembled frame beam column node that adopts in the engineering is mostly "wet" node, and its common way is: the frame beam and the frame column are prefabricated in a factory, and the beam and the column are net sizes (the length of a deduction node area). During on-site assembly, the precast beam longitudinal ribs extend into the nodes, the column longitudinal ribs are communicated in the node areas, and concrete is poured in the node areas.
The inventor thinks that: for the above conventional method, when the structure height is large and the earthquake-resistant grade is high, the problems that the steel bars in the node area are dense, the concrete pouring quality in the node area is difficult to guarantee and the like exist, the earthquake-resistant performance and the construction efficiency of the structure are seriously influenced, and the popularization and the application of the assembly type structure are further influenced. For the assembled dry-type node, the node is still in the exploration stage at home and abroad, and the existing node methods have the defects of early structural cracking, large damage after earthquake, difficult repair, complex field assembly and installation and the like, and are not convenient to popularize and apply.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming above-mentioned prior art not enough, providing a mix horizontal dry-type beam column node of formula of burying in arrangement of reinforcement, can adopt more efficient method to carry out the on-the-spot assembly on the basis of guaranteeing node wholeness and anti-seismic performance, reduce the wet work volume in scene.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a mix reinforcement formula of burying low prestressing force dry-type beam column node, includes precast concrete post, precast concrete roof beam, ordinary reinforcing bar and prestressing tendons, and the both sides of precast concrete post are equipped with precast concrete roof beam respectively, precast concrete roof beam includes the first roof beam body and the second roof beam body that the segmentation was arranged.
And the common steel bars sequentially penetrate through the first beam body, the precast concrete column and the second beam body and then fixedly connect the precast concrete column with the precast concrete beam.
And the prestressed tendons sequentially penetrate through the first beam body, the precast concrete column and the second beam body and then fixedly connect the precast concrete column with the precast concrete beam.
The prestressed tendons are symmetrically arranged about the top end and the bottom end of the prestressed beam, and two sides of each prestressed tendon are respectively provided with common steel bars with parallel axes; the prestressed reinforcing steel bars and the common reinforcing steel bars are mixed and reinforced.
The prestressed concrete beam concrete structure is characterized in that a coating smooth round sleeve is arranged in the middle of the prestressed tendon to form an unbonded section, two sides of the unbonded section are bonding sections, two ends of the prestressed tendon are bonded and fixed with the precast concrete beam respectively, and two ends of the common steel bar are bonded and fixed with the precast concrete beam respectively.
The combination of the prefabricated concrete columns and the prefabricated concrete beams is adopted, so that wet operation construction in a node area is avoided, and the construction efficiency and quality are improved.
The beam top and the beam bottom of the precast concrete beam both adopt high-strength prestressed tendons and common steel bars for mixed reinforcement, the prestressed tendons have no bonding sections locally, and the embedded fixed ends are arranged to simplify the tensioning construction of the prestressed tendons. On the basis of ensuring the anti-seismic performance, the using amount of the steel bars can be greatly reduced, the problem of redundant and miscellaneous steel bars in a node area is solved, and the construction efficiency is improved. The prestressed tendons adopt a lower prestress level, so that the cracking of the member can be delayed, and the prestressed tendons are in an elastic stage under the conditions of medium and large earthquakes, so that the nodes have a good deformation self-recovery function, and the post-earthquake repair is facilitated.
Furthermore, the head end of prestressing tendons is through burying stiff end and bonding section and first roof beam body fixed connection in, bury the stiff end including the cover establish at outside extrusion sleeve ground tackle, steel backing plate and the spiral muscle of prestressing tendons.
By adopting the pre-embedded fixing mode of one end of the prestressed tendon and the first beam body, the difficulty of tensioning and anchoring the prestressed tendon can be reduced, and the construction efficiency is improved.
Furthermore, a common steel bar hole and a prestressed rib hole are respectively arranged in the second beam body and the precast concrete column, a common steel bar is arranged in the common steel bar hole, and a prestressed rib is arranged in the prestressed rib hole.
The adjacent first beam body, the second beam body and the precast concrete column can be conveniently connected through steel bars or steel strands by adopting the prestressed rib hole channel and the common steel bar hole channel.
Further, the coating smooth circular sleeve is tightly matched with the prestressed tendon and positioned through spot welding, the coating smooth circular sleeve is arranged in a prestressed tendon pore passage in the precast concrete column, the coating smooth circular sleeve extends to two sides for a set distance from the precast concrete column, and the outer surface of the coating smooth circular sleeve is coated with the greasy anti-sticking agent.
By adopting the coating smooth round sleeve, the prestressed tendon can be prevented from buckling or embossing damage, and can form an unbonded section, thereby being beneficial to the deformation recovery of the beam-column joint after the earthquake.
Furthermore, the head end of the prestressed tendon is pre-buried and fixed in the first beam body, the tail end of the prestressed tendon passes through the first beam body and the precast concrete column and then extends out of the second beam body, and the tail end of the prestressed tendon is connected with the second beam body in an anchoring mode.
Further, the head end of ordinary reinforcing bar is pre-buried to be set up in first roof beam body, stretch into in the second roof beam body behind first roof beam body, the precast concrete post of end passing of ordinary reinforcing bar, the end ring cover of ordinary reinforcing bar is provided with the grout sleeve, grout sleeve is pre-buried to be set up in the second roof beam body, the grout sleeve is located the encryption district outside.
Furthermore, a communicating cavity is arranged between the common steel bar hole and the prestressed rib hole in the second beam body and the precast concrete column.
By adopting the structure of the communicating cavity, the bonding between the prestressed reinforcement bonding section and the second beam body, the bonding between the common steel bar and the second beam body and between the common steel bar and the precast concrete column can be completed by one-time grouting, and the working procedures are saved.
The utility model also provides a construction method of the formula of burying low prestressing force dry-type beam column node in mixed arrangement of reinforcement, including following step:
step 1, prefabricating a concrete column, and reserving a common steel bar hole and a prestressed tendon hole;
one end of a prestressed tendon is embedded in the first beam body through an embedded fixed end, and the other end of the prestressed tendon is provided with a coating smooth round sleeve; a common steel bar pore channel and a prestressed steel bar pore channel are reserved in the second beam body, a grouting sleeve is embedded at the tail end of the common steel bar pore channel, and a communicating cavity is arranged between the common steel bar pore channel and the prestressed steel bar pore channel;
the tail end of the common steel bar is required to extend into the corresponding grouting sleeve and meet the requirement of the anchoring length of the steel bar, and the prestressed tendon is required to extend out of the top surface or the bottom surface of the second beam body;
and 3, tensioning the prestressed tendon and anchoring the tail end of the prestressed tendon and the second beam body according to the tensioning control stress requirement.
And 4, performing concrete pressure grouting on the common steel bar pore passage and the prestressed tendon pore passage through the grouting sleeve and the communication cavity.
Further, in the step 1, the precast concrete columns are precast in layers or two layers according to the hoisting capacity of the equipment; the precast concrete beam is precast in sections according to the span, namely a first beam body and a second beam body are precast in sections.
The utility model has the advantages that:
the utility model provides a be suitable for "dry-type" node way of assembled concrete frame structure, avoided the wet operation construction in node district, improve efficiency of construction and quality. The beam top and the beam bottom are both made of high-strength prestressed steel bars and common anti-seismic steel bars, the prestressed steel bars are made of lower prestressed levels, local unbonded sections are formed by the anti-buckling coating smooth circular sleeves, and the embedded fixed ends are arranged to simplify the tensioning construction of the prestressed steel bars. The node can greatly reduce the using amount of the steel bars on the basis of ensuring the anti-seismic performance, solves the problem of redundant and miscellaneous steel bars in a node area, and improves the construction efficiency. And can ensure that the prestressed tendons are in an elastic stage under the conditions of medium and large earthquakes, so that the node has a good deformation self-recovery function and is favorable for repairing after the earthquake.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a top view of a node of an overall structure according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;
fig. 5 is a schematic structural view of the coating smooth circular sleeve and the prestressed tendons according to the embodiment of the present invention;
fig. 6 is a schematic structural view of a first beam body in an embodiment of the present invention;
fig. 7 is the installation schematic diagram of the first beam body, the precast concrete post and the second beam body in the embodiment of the present invention.
In the figure: 1. prefabricating a concrete column; 2. prefabricating a concrete beam; 3. ordinary steel bars; 4. prestressed tendons; 5. coating a smooth round sleeve; 6. the fixed end is embedded; 7. a common steel bar duct; 8. a prestressed tendon duct; 9. grouting a sleeve; 10. a communicating chamber.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Embodiment 1, as shown in fig. 1 to 7, this embodiment provides a hybrid reinforcement embedded low-prestress dry beam-column node, which includes a precast concrete column, a precast concrete beam, a common steel bar, and a prestressed reinforcement, where two sides of the precast concrete column are respectively provided with the precast concrete beam, and the precast concrete beam includes a first beam body and a second beam body that are arranged in sections.
And the common steel bars sequentially penetrate through the first beam body, the precast concrete column and the second beam body and then fixedly connect the precast concrete column with the precast concrete beam.
And the prestressed tendons sequentially penetrate through the first beam body, the precast concrete column and the second beam body and then fixedly connect the precast concrete column with the precast concrete beam.
The prestressed tendons are symmetrically arranged about the top end and the bottom end of the prestressed beam, and two sides of each prestressed tendon are respectively provided with common steel bars with parallel axes; the prestressed reinforcing steel bars and the common reinforcing steel bars are mixed and reinforced.
The prestressed concrete beam concrete structure is characterized in that a coating smooth round sleeve is arranged in the middle of the prestressed tendon to form an unbonded section, two sides of the unbonded section are bonding sections, two ends of the prestressed tendon are bonded and fixed with the precast concrete beam respectively, and two ends of the common steel bar are bonded and fixed with the precast concrete beam respectively.
Specifically, the middle part of the common steel bar can be completely bonded with the precast concrete beam and the precast concrete column, and a local unbonded means can also be adopted, namely a sleeve is arranged at the connecting end surface of the precast concrete column and the precast concrete beam, the sleeve is sleeved outside the common steel bar, and the common steel bar is in an unbonded state at the position of the sleeve; the deformation of ordinary steel bars and prestressed tendons at the joints can be preferentially carried out in the earthquake of the joints formed by the precast concrete columns and the precast concrete beams, the precast concrete beams are protected, and the joints can be conveniently restored after the earthquake.
Specifically, the prestressed tendon adopts a lower prestress level, the tension control stress is far smaller than that of a conventional prestressed project, the value is 0.1-0.3 times of the standard value of the ultimate strength of the steel bar, and when the requirement of the house on crack resistance is not high, the prestressed tendon can not be applied, so that the prestressed tendon has higher deformation capacity, and the prestressed tendon is ensured to be in an elastic stage under the action of medium and large earthquakes.
Preferably, the head end of the prestressed tendon is fixedly connected with the first beam body through an embedded fixed end and a bonding section, and the embedded fixed end comprises an extrusion sleeve anchorage, a steel base plate and a spiral tendon which are sleeved outside the prestressed tendon.
Preferably, a common steel bar hole and a prestressed rib hole are respectively formed in the second beam body and the precast concrete column, a common steel bar is arranged in the common steel bar hole, and a prestressed rib is arranged in the prestressed rib hole.
Preferably, the coating smooth circular sleeve is tightly matched with the prestressed tendon and positioned by spot welding, the coating smooth circular sleeve is arranged in a prestressed tendon pore passage in the precast concrete column, the coating smooth circular sleeve extends to two sides for a set distance from the precast concrete column, and the outer surface of the coating smooth circular sleeve is coated with the greasy anti-sticking agent.
Specifically, the coating smooth circular sleeve is an unbonded buckling-preventing sleeve, is tightly matched with the prestressed tendons, is pressed and bent under the action of an inevitable shock, the length of the sleeve is equal to the unbonded section length of the prestressed tendons, one end of the sleeve is positioned with the prestressed tendons through spot welding, and the outer surface of the sleeve is coated with the greasy anti-sticking agent, so that the sleeve is unbonded with surrounding wrapping materials.
Preferably, the head end of the prestressed tendon is pre-buried and fixed in the first beam body, the tail end of the prestressed tendon passes through the first beam body and the precast concrete column and then extends out of the second beam body, and the tail end of the prestressed tendon is connected with the second beam body in an anchoring mode.
Specifically, after the prestressed tendons 4 penetrate through the prestressed tendon hole passages 8 in the second beam body, the prestressed tendons extend out of the beam top or the beam bottom near the clear span of the second beam body 1/3 to be tensioned and anchored.
Preferably, the head end of ordinary reinforcing bar is pre-buried to be set up in first roof beam body, stretch into in the second roof beam body behind first roof beam body, the precast concrete post of end passing of ordinary reinforcing bar, the end ring cover of ordinary reinforcing bar is provided with the grout sleeve, grout sleeve is pre-buried to be set up in the second roof beam body, the grout sleeve is located the encryption district outside.
Preferably, a communicating cavity is arranged between the common steel bar hole and the prestressed tendon hole in the second beam body and the precast concrete column.
Preferably, the grouting sleeve is located at the tail end of the second beam body encryption area, and the stirrup encryption area is provided with a plurality of stirrups.
step 1, prefabricating a concrete column, and reserving a common steel bar hole and a prestressed tendon hole;
one end of a prestressed tendon is embedded in the first beam body through an embedded fixed end, and the other end of the prestressed tendon is provided with a coating smooth round sleeve; a common steel bar pore channel and a prestressed steel bar pore channel are reserved in the second beam body, a grouting sleeve is embedded at the tail end of the common steel bar pore channel, and a communicating cavity is arranged between the common steel bar pore channel and the prestressed steel bar pore channel;
the tail end of the common steel bar is required to extend into the corresponding grouting sleeve and meet the requirement of the anchoring length of the steel bar, and the prestressed tendon is required to extend out of the top surface or the bottom surface of the second beam body;
and 3, tensioning the prestressed tendon and anchoring the tail end of the prestressed tendon and the second beam body according to the tensioning control stress requirement.
And 4, performing concrete pressure grouting on the common steel bar pore passage and the prestressed tendon pore passage through the grouting sleeve and the communication cavity.
Preferably, in the step 1, the precast concrete columns are precast in layers or two layers according to the hoisting capacity of the equipment; the precast concrete beam is precast in sections according to the span, namely a first beam body and a second beam body are precast in sections.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (7)
1. A mixed reinforcement embedded low-prestress dry beam-column joint is characterized by comprising,
the prefabricated concrete column is provided with prefabricated concrete beams on two sides respectively, and each prefabricated concrete beam comprises a first beam body and a second beam body which are arranged in a segmented mode;
the common steel bars sequentially penetrate through the first beam body, the precast concrete column and the second beam body and then fixedly connect the precast concrete column with the precast concrete beam;
the prestressed tendon fixedly connects the precast concrete column with the precast concrete beam after sequentially penetrating through the first beam body, the precast concrete column and the second beam body;
the prestressed tendons are symmetrically arranged about the top end and the bottom end of the precast concrete beam, common steel bars with parallel axes are respectively arranged on two sides of the prestressed tendons, and the prestressed tendons and the common steel bars are mixed for reinforcing;
the prestressed concrete beam concrete structure is characterized in that a coating smooth round sleeve is arranged in the middle of the prestressed tendon to form an unbonded section, two sides of the unbonded section are bonding sections, two ends of the prestressed tendon are bonded and fixed with the precast concrete beam respectively, and two ends of the common steel bar are bonded and fixed with the precast concrete beam respectively.
2. The embedded low-prestress dry beam-column joint of the hybrid reinforcement according to claim 1, wherein the head end of the prestressed reinforcement is fixedly connected with the first beam body through an embedded fixed end and a bonding section, and the embedded fixed end comprises an extrusion sleeve anchorage arranged outside the prestressed reinforcement in a sleeved mode, a steel base plate and a spiral reinforcement.
3. The embedded low-prestress dry beam-column joint with mixed reinforcements according to claim 1, wherein a common reinforcement hole and a prestressed reinforcement hole are respectively arranged in the second beam body and the precast concrete column, common reinforcements are arranged in the common reinforcement hole, and prestressed reinforcements are arranged in the prestressed reinforcement hole.
4. The embedded low-prestress dry beam-column joint of the hybrid reinforcement according to claim 1, wherein the coated smooth round sleeve is tightly matched with the prestressed reinforcement and positioned by spot welding, and the outer surface of the coated smooth round sleeve is coated with a greasy anti-sticking agent.
5. The embedded low-prestress dry beam-column joint of the hybrid reinforcement according to claim 1, wherein the head end of the prestressed reinforcement is embedded and fixed in a first beam body, the tail end of the prestressed reinforcement extends out of a second beam body after penetrating through the first beam body and the precast concrete column, and the tail end of the prestressed reinforcement is connected with the second beam body in an anchoring manner.
6. The embedded low-prestress dry beam-column joint with mixed reinforcement according to claim 1, wherein the head end of the common reinforcement is pre-buried in a first beam body, the tail end of the common reinforcement penetrates through the first beam body and the precast concrete column and then extends into a second beam body, the ring sleeve at the tail end of the common reinforcement is provided with a grouting sleeve, the grouting sleeve is pre-buried in the second beam body, and the grouting sleeve is located outside a dense area.
7. The embedded low-prestress dry beam-column joint with hybrid reinforcements according to claim 3, wherein a communication cavity is arranged between a common reinforcement hole and a prestressed reinforcement hole in the second beam body and the precast concrete column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920176484.3U CN210887572U (en) | 2019-01-31 | 2019-01-31 | Mixed reinforcement embedded low-prestress dry beam-column joint |
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| CN201920176484.3U CN210887572U (en) | 2019-01-31 | 2019-01-31 | Mixed reinforcement embedded low-prestress dry beam-column joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653350A (en) * | 2019-01-31 | 2019-04-19 | 山东建筑大学 | A kind of hybrid reinforcement built-in type lower-prestressed dry type bean column node and method |
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2019
- 2019-01-31 CN CN201920176484.3U patent/CN210887572U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653350A (en) * | 2019-01-31 | 2019-04-19 | 山东建筑大学 | A kind of hybrid reinforcement built-in type lower-prestressed dry type bean column node and method |
| CN109653350B (en) * | 2019-01-31 | 2024-01-19 | 山东建筑大学 | Mixed reinforcement embedded low-prestress dry beam column node and method |
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