CN213709859U - Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure - Google Patents
Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure Download PDFInfo
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- CN213709859U CN213709859U CN202021854305.6U CN202021854305U CN213709859U CN 213709859 U CN213709859 U CN 213709859U CN 202021854305 U CN202021854305 U CN 202021854305U CN 213709859 U CN213709859 U CN 213709859U
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Abstract
The utility model discloses a prefabricated part area recess coincide frame roof beam for assembled concrete anti-seismic structure, including the precast beam with after water the concrete superimposed sheet on the precast beam upper surface open flutedly on the upper surface of precast beam-ends, just the recess forms the opening on the roof beam terminal surface, the part of concrete superimposed sheet is pour in this recess. The utility model discloses set up the recess at precast beam end, not only can increase cast in situ concrete and precast concrete's bonding, have the effect of leaving moulding hinge deformation space moreover, reduced the trouble of construction formwork on the one hand, simplified the preparation technology, improved production efficiency, reduced manufacturing cost, on the other hand the utility model discloses a superimposed layer is in and is pressed the district or is drawn the district, does not influence its and cast in situ beam equality in the aspect of static load bending resistance performance. The utility model discloses compare and have lower ductility coefficient in cast-in-place roof beam, nevertheless its minimum ductility coefficient requirement that still satisfies the roof beam component possesses the engineering suitability.
Description
Technical Field
The utility model relates to an coincide frame roof beam for assembled concrete anti-seismic structure especially relates to a prefabricated part area recess coincide frame roof beam for assembled concrete anti-seismic structure.
Background
Under the social background that the country greatly promotes the development of the assembly type building and promotes the transformation and upgrading of the building industry, through the development of recent years, the assembly type building in China has made breakthrough progress and is encouraged and supported by the state and governments at all levels. More and more areas begin to recognize that the popularization of the prefabricated buildings is of great significance to the economic, social and environmental development, wherein 'guidance opinions about the rapid development of the prefabricated buildings' (the ministry of our government [ 2016 ]) discharged from the state department in 2016 indicates that the force is in competition for about 10 years, so that the proportion of the prefabricated buildings in the newly built building area reaches 30%. In addition, various places also driven the development of the assembly type in response to national policies, wherein the implementation opinions of the office of people's government in Guangdong province on the vigorous development of the assembly type building (Guangdong office [ 2017 ] No. 28) pointed out that the proportion of the area of the assembly type building occupying the newly built building is not less than 50% by 2025 years. Therefore, the assembly type building becomes one of the main development directions of the building industry in China in the future, and the assembly type building introduces the building industry into a new era of reformation and development. The fabricated building can be rapidly increased and comprehensively popularized in China, and has wide market prospect.
The method reduces the measure cost of installation and construction as a link by improving the precision and the quality of the prefabricated components of the factory, finally effectively controls the comprehensive construction and installation cost of the assembly type building, and is the target of the development of the assembly type building in China. In the technical specification of prefabricated concrete structures (JGJ 1-2014) of the national industry standard, a prefabricated frame structure-frame beam usually adopts a superposed beam structure method, namely when a superposed beam is adopted, the thickness of a superposed layer of post-cast concrete of the frame beam is not smaller than 150mm, the thickness of a post-cast concrete superposed layer of a secondary beam is not smaller than 120mm, when a prefabricated beam with a notch section is adopted, the depth of the notch is not smaller than 50mm, and the thickness of the edge of the notch is not smaller than 60 mm. The notch mainly serves to increase the bonding of cast-in-place concrete and precast concrete.
However, in the actual production of components, it is found that the notch stacking of the notch superposed beam causes inconvenience in manufacturing if the beam width is small during prefabrication, for example, the notch superposed beam is very unfavorable during demold, and because the notch superposed beam is inconvenient to manufacture, a part of component processing factories do not manufacture notches when the thickness of the superposed layer of the precast beams does not meet more than 150mm in order to improve the production efficiency, although the notch superposed layer shows that all performance indexes of the non-notch precast beams meet the requirements, reports of related experiments and theoretical researches are rare, and the quantitative influence of the notches on the static and earthquake resistance of the precast beams is difficult to infer from the assembly industry standard.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prefabricated part area recess coincide frame roof beam for assembled concrete anti-seismic structure simple structure, easily preparation, low in manufacturing cost, improvement production efficiency, anti-seismic performance are high.
The purpose of the utility model can be realized by the following technical measures: the utility model provides a prefabricated part area recess coincide frame roof beam for assembled concrete anti-seismic structure, includes precast beam and the post-cast concrete superimposed layer on precast beam upper surface, its characterized in that open flutedly on precast beam end's the upper surface, just the recess forms the opening on the roof beam terminal surface, the part of concrete superimposed layer is pour in this recess.
The coincide frame roof beam is great in structure lateral displacement under big earthquake effect, and the plastic hinge power consumption can appear in the beam-ends, the utility model discloses set up the recess at precast beam-ends, and do not set up the recess receiving the less roof beam interlude of earthquake effect influence, not only can increase cast in situ concrete and precast concrete's bonding, have the effect of leaving moulding hinge deformation space moreover, do the notch with the whole roof beam of current coincide roof beam and compare, the utility model discloses an aspect has reduced the trouble of construction formwork, has simplified the preparation technology, has improved production efficiency, has reduced manufacturing cost, on the other hand the utility model discloses a coincide layer is in compression district (the middle part is striden to the roof beam) or is drawn district (frame node bending moment department), does not influence its and cast in situ roof beam equality in the aspect of static load bending resistance. The utility model discloses compare and have lower ductility coefficient in cast-in-place roof beam, nevertheless its minimum ductility coefficient requirement that still satisfies the roof beam component possesses the engineering suitability, is suitable for extensive popularization and use.
The length of the groove is 0.5 h-1.0 h, and h is the height of the beam section.
The degree of depth of recess is 50 ~ 100mm, and the both sides cell wall thickness of recess is 40 ~ 100 mm.
Prefabricated part takes recess coincide frame roof beam and end face of column connection for the rough surface or set up the keyway, the size and the quantity of keyway should be calculated according to relevant standard regulation and confirm.
The utility model discloses pre-buried beam stirrup, beam-bottom muscle and the upper portion longitudinal reinforcement that has in the precast beam, beam stirrup staple bolt live beam-bottom muscle and upper portion longitudinal reinforcement.
The beam stirrup is closed stirrup, closed stirrup surrounds beam bottom muscle and upper portion longitudinal reinforcement.
The beam stirrup is upper end open-ended opening stirrup the opening part is equipped with the stirrup cap, the stirrup cap is connected on the upper portion longitudinal reinforcement that is in both sides.
The beam stirrup is sparsely distributed in the middle section of the beam, and is at the beam end and in the position of the groove is densely distributed.
Compared with the prior art, the utility model discloses the effect that is showing as follows has:
the utility model discloses the position that plastic hinge probably appears at precast beam end sets up the recess, and does not set up the recess receiving the less roof beam interlude of earthquake effect influence, not only can increase cast in situ concrete and precast concrete's bonding, has the effect of leaving moulding hinge deformation space moreover, does the notch with the whole roof beam of current superposed beam and compares, the utility model discloses an aspect has reduced the trouble of construction formwork, has simplified the preparation technology, has improved production efficiency, has reduced manufacturing cost, on the other hand the utility model discloses a superposed layer is in compression district (the middle part is striden to the roof beam) or is drawn district (frame node bending moment department), does not influence its and cast-in-situ roof beam the equality in the aspect of static load bending resistance. The utility model discloses compare and have lower ductility coefficient in cast-in-place roof beam, nevertheless its minimum ductility coefficient requirement that still satisfies the roof beam component possesses the engineering suitability, is suitable for extensive popularization and use.
The utility model is suitable for an it is two thoughtlessly congeals the anti-seismic structure to treat, and can be applied to among low floor, multilayer, high-rise assembled concrete frame structure, compare in the structure way of the relevant superposed beam of recommending in the existing national industry standard "assembled concrete structure technical regulation" (JGJ 1-2014), solved in the standard the notch edge of notch superposed beam stamp when prefabricating if the beam width is less will lead to the inconvenient problem of its preparation to solve the present existing prefabricated component processing enterprise of china and bring inconvenient problem in the actual production to the superposed beam of recommending in the standard, improve production efficiency.
The utility model discloses an aspect is favorable to laying of prefabricated component manufacturing enterprise assembly line and the stability of operation, and on the other hand can improve the quality of prefabricated component and reduce the impaired possibility of component in engineering links such as transportation and installation, and this two has very important meaning to guarantee assembly type building engineering's time limit for a project, cost and quality.
Drawings
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
FIG. 1 is a longitudinal sectional view of a precast beam according to embodiment 1 of the present invention;
figure 2 is a schematic cross-sectional view of a beam end of embodiment 1 of the present invention;
figure 3 is a cross-sectional schematic view of the middle section of the beam of embodiment 1 of the invention;
figure 4 is a schematic cross-sectional view of a beam end of embodiment 2 of the present invention;
figure 5 is the utility model discloses a cross section schematic diagram of embodiment 2 roof beam interlude.
Detailed Description
Example 1
As shown in fig. 1 ~ 3, be the utility model relates to a prefabricated part area recess coincide frame roof beam for assembled concrete anti-seismic structure, the cross-section of roof beam is the rectangle, including precast beam 1 with after water in precast beam upper surface on concrete superimposed layer 8, precast beam 1 comprises beam-ends 7 and roof beam interlude 3, it has the recess 2 of rectangle to open on the upper surface of 1 beam-ends 7 of precast beam, and recess 2 forms the opening on the beam-ends face, concrete superimposed layer 8's part 81 is pour in this recess 2, the recess is not established to roof beam interlude 3.
In this embodiment, the length of the groove 2 is 0.5h, and h is the beam cross-sectional height. The depth of the groove 2 is 50mm, and the thickness a of the groove walls at two sides of the groove 2 is 40 mm.
The beam stirrups, the beam bottom reinforcements 5 and the upper longitudinal reinforcements 6 are embedded in the precast beam 1, and the beam stirrups hoop the beam bottom reinforcements 5 and the upper longitudinal reinforcements 6. Wherein, the beam bottom rib 5 is configured according to the design requirement, and the beam stirrup is configured according to the relevant specification.
In this embodiment, the beam stirrup is an open-ended stirrup 9 with an open upper end, a stirrup cap 10 is provided at the open-end, and the stirrup cap 10 is connected to the upper longitudinal steel bars 6 on both sides. The beam stirrups 9 are sparsely distributed in the middle section 3 of the beam less affected by the earthquake to form a stirrup non-dense area, and are densely distributed at the beam end 7 where the plastic hinge possibly occurs and the position of the groove 2 to form a stirrup dense area.
The utility model discloses prefabricated part takes recess coincide frame roof beam and end face of column connection to be the mat surface, and this terminal surface is the terminal surface of prefabricated roof beam 1 and concrete superimposed layer 8 and is located the terminal surface of recess 2 inside part 81 promptly.
Example 2
As shown in fig. 4 and 5, the present embodiment is different from embodiment 1 in that: the beam stirrup is a closed stirrup 11, and the closed stirrup 11 encloses the beam bottom reinforcement 5 and the upper longitudinal reinforcement 6. The utility model discloses prefabricated part takes recess coincide frame roof beam and column connection's terminal surface to be equipped with the keyway, and this terminal surface is terminal surface and the concrete lamination layer 8 of precast beam 1 promptly and is located the terminal surface of 2 inside parts 81 of recess, and the size and the quantity of keyway should calculate according to relevant standard rule and confirm.
In other embodiments, the length of the groove is 0.5h to 1.0h, and h is the beam cross-sectional height. The depth of the groove is 50-100 mm, and the thickness of the groove walls on the two sides of the groove is 40-100 mm, and can be determined according to actual conditions.
The embodiments of the present invention are not limited to the above, according to the above-mentioned contents of the present invention, according to the common technical knowledge and the conventional means in the field, without departing from the basic technical idea of the present invention, the present invention also has various modifications, replacements or alterations, all falling within the protection scope of the present invention.
Claims (8)
1. The utility model provides a prefabricated part area recess coincide frame roof beam for assembled concrete anti-seismic structure, includes precast beam and the post-cast concrete superimposed layer on precast beam upper surface, its characterized in that: and a groove is formed in the upper surface of the beam end of the precast beam, the groove forms an opening in the beam end surface, and part of the concrete superposed layer is poured in the groove.
2. The precast partial grooved laminated frame beam of claim 1, wherein: the length of the groove is 0.5 h-1.0 h, and h is the height of the cross section of the beam.
3. The precast partial grooved laminated frame beam of claim 2, wherein: the depth of the groove is 50-100 mm, and the thickness of the groove walls on the two sides of the groove is 40-100 mm.
4. The precast partial grooved laminated frame beam of claim 3, wherein: the beam stirrups, the beam bottom reinforcements and the upper longitudinal reinforcements are embedded in the precast beam, and the beam stirrups hoop the beam bottom reinforcements and the upper longitudinal reinforcements.
5. The precast partial grooved laminated frame beam of claim 4, wherein: the beam stirrups are closed stirrups which surround the beam bottom reinforcements and the upper longitudinal reinforcements.
6. The precast partial grooved laminated frame beam of claim 4, wherein: the beam stirrup is an open stirrup with an upper end open, a stirrup cap is arranged at the opening, and the stirrup cap is connected to the upper longitudinal steel bars on two sides.
7. The precast partial grooved laminated frame beam of claim 5 or 6, characterized in that: the beam stirrups are sparsely distributed in the middle section of the beam, and are densely distributed at the beam end and at the positions of the grooves.
8. The precast partial grooved laminated frame beam of claim 7, wherein: the end face of the prefabricated part with the groove overlapping frame beam connected with the column is a rough face or provided with a key groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021854305.6U CN213709859U (en) | 2020-08-28 | 2020-08-28 | Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021854305.6U CN213709859U (en) | 2020-08-28 | 2020-08-28 | Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure |
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| CN213709859U true CN213709859U (en) | 2021-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365015A (en) * | 2023-09-11 | 2024-01-09 | 上海宝冶集团有限公司 | Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam |
| CN117365014A (en) * | 2023-09-11 | 2024-01-09 | 上海宝冶集团有限公司 | Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam |
-
2020
- 2020-08-28 CN CN202021854305.6U patent/CN213709859U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365015A (en) * | 2023-09-11 | 2024-01-09 | 上海宝冶集团有限公司 | Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam |
| CN117365014A (en) * | 2023-09-11 | 2024-01-09 | 上海宝冶集团有限公司 | Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam |
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