CN220451087U - UHPC (ultra high pressure) connected prefabricated prestressed concrete open-pore beam frame structure system - Google Patents
UHPC (ultra high pressure) connected prefabricated prestressed concrete open-pore beam frame structure system Download PDFInfo
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- CN220451087U CN220451087U CN202121499559.5U CN202121499559U CN220451087U CN 220451087 U CN220451087 U CN 220451087U CN 202121499559 U CN202121499559 U CN 202121499559U CN 220451087 U CN220451087 U CN 220451087U
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- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 60
- 239000011148 porous material Substances 0.000 title claims abstract description 36
- 239000004567 concrete Substances 0.000 claims abstract description 32
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 15
- 239000011178 precast concrete Substances 0.000 claims description 30
- 238000010276 construction Methods 0.000 claims description 17
- 210000002435 tendon Anatomy 0.000 claims description 11
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims 2
- 210000002268 wool Anatomy 0.000 claims 1
- 238000004873 anchoring Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 27
- 238000004364 calculation method Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Abstract
The utility model discloses a UHPC (ultra high pressure) connected prefabricated prestressed concrete open-pore beam frame structure system which comprises a prefabricated concrete upper column, a prefabricated concrete lower column, a prefabricated prestressed concrete open-pore superposed beam, a UHPC node core area and a superposed plate. The upper longitudinal main ribs extend out of the bottom surface of the prefabricated upper column and are directly anchored in the UHPC node core area, the lower longitudinal main ribs extend out of the top surface of the prefabricated lower column and are directly anchored in the UHPC node core area, and the prestressed ribs and the common reinforcing steel bars extend out of the prefabricated prestressed concrete openings Liang Duanmian and are directly anchored or bent and anchored in the UHPC node core area. The structure system is convenient and quick to construct on site, improves the installation efficiency of the components, can greatly reduce the anchoring length of the reinforcing steel bars, greatly reduces the amount of stirrups in the core area of the node, avoids crowding of the reinforcing steel bars in the core area of the node, reduces the section height of the components, lightens the dead weight and improves the crack resistance of the components, thereby improving the earthquake resistance of the whole frame structure.
Description
Technical Field
The utility model relates to the technical field of prefabricated prestressed assembled building construction, in particular to a prefabricated prestressed concrete open-pore beam frame structure system connected by UHPC (ultra high pressure concrete), and a design and construction method thereof.
Background
The cast-in-situ structure has the defects of low construction efficiency, high energy consumption and the like, and is difficult to adapt to the development requirements of building industrialization. The prefabricated building has become the development direction of building industrialization due to the advantages of high construction speed, industrialized production of components, field wet operation reduction, environmental pollution reduction and the like. Through years of development and popularization, prefabricated assembled concrete structures have been widely studied and used.
The prefabricated assembled concrete frame structure refers to a structure that beam column components are prefabricated in a prefabrication factory and transported to a construction site to be connected to form an integral structure. Compared with the cast-in-place concrete structure, the cast-in-place concrete structure has the advantages of high construction speed, easily guaranteed component quality, good quality, small environmental pollution, labor cost saving, a large number of templates and supports saving and the like, and is a structure form with very broad prospects. For the wet connection assembly type concrete frame structure, the node construction form which is easy to construct and effectively ensures the integrity is key to popularization and application. However, from the view of the past earthquake disasters, the assembled structure is seriously damaged in the earthquake, and the same earthquake-resistant performance as that of the cast-in-situ structure is difficult to achieve. In order to improve the integrity and reliability of the node connection of the fabricated concrete frame and achieve and even exceed the earthquake-resistant performance of the cast-in-place concrete structure, a pre-stress technology and UHPC (Ultra High Performance Concrete, ultra-high performance concrete) material are introduced into the fabricated structure.
The pre-tensioned pre-stress assembled concrete structure is divided into a pre-tensioned pre-stress assembled concrete structure and a post-tensioned pre-stress assembled concrete structure, wherein the pre-tensioned pre-stress assembled concrete structure is formed by tensioning pre-stressed tendons before building components, pouring the components, and the post-tensioned pre-stress assembled concrete structure is formed by pre-embedding the pre-stressed tendons or corrugated pipes before building the concrete and tensioning the pre-stressed tendons when building the components, and finally, assembling the components together. The internal stress generated by the prestress on the concrete section can partially or completely offset the section stress under the load, delay the occurrence of cracks and improve the rigidity of the component. During unloading, the crack can be partially or completely closed, and the elastic recovery performance of the structure is good. Meanwhile, the prestressed concrete can fully utilize the material strength of the prestressed tendons and the concrete, and lighten the dead weight of the structure. And the application of the prestress is beneficial to the improvement of the usability and the integrity of the assembled structure, and the application of the assembled structure in a large-span and heavy-load structure is promoted.
The UHPC has excellent bonding performance, and can greatly reduce the anchoring length of the steel bar and the prestressed steel bar; the strength is high, the hooping consumption of the node core area can be reduced, and the UHPC is used for the node core area, so that the structure is simple and the frame integrity is good. The pre-stress structure has excellent stress performance, and UHPC is applied to the node core area to form the pre-stress frame structure. The structure is subjected to intensive research, and is favorable for further popularization and application of the prefabricated prestressed concrete frame structure.
Disclosure of Invention
Aiming at the defects existing in the prior art and combining the excellent performance of UHPC, the utility model provides a UHPC connected prefabricated prestressed concrete open-pore beam frame structure system and a design and construction method thereof. The structure combines the pre-tensioning or post-tensioning prestressed structure, the assembled structure and the superposed structure, and adopts UHPC high-performance materials, thereby achieving the purpose of improving the earthquake resistance of the prefabricated assembled concrete frame structure.
The utility model has the advantages of mainly representing the two aspects of the connection technology of the precast concrete beam column components and the steel bar connection technology between the components. In the aspect of component connection technology, beam column components are connected through UHPC with excellent performance, a UHPC node core area is formed, and the anti-seismic fortification requirements of strong-node weak components are more easily realized, so that the ductility of beam column nodes is improved, and the anti-seismic performance of the whole frame structure is improved. In the aspect of the steel bar connection technology, the steel bars between the beam column components only need simple lap joint, and the lap joint length is small, so that the manufacturing time and the field installation time of the prefabricated components are greatly saved.
The technical problems solved by the utility model can be realized by adopting the following technical scheme:
a UHPC connected prefabricated prestressed concrete open-pore beam frame structure system comprises a prefabricated concrete upper column, a prefabricated concrete lower column, a prefabricated prestressed concrete open-pore superposed beam, a UHPC node core area and a superposed slab;
an upper longitudinal main rib is arranged in the precast concrete upper column, a lower longitudinal main rib is arranged in the precast concrete lower column, a precast prestressed concrete perforated laminated beam and a beam laminated layer are arranged in the precast prestressed concrete perforated beam, the precast prestressed concrete perforated beam is provided with prestressed ribs and common reinforcing steel bars, a top through long reinforcing steel bar is arranged in the beam laminated layer, and the laminated plate consists of a precast concrete slab and a plate laminated layer poured on the slab;
the upper longitudinal main ribs extend out of the bottom surface of the prefabricated upper column and are directly anchored in the UHPC node core area, the lower longitudinal main ribs extend out of the top surface of the prefabricated lower column and are directly anchored in the UHPC node core area, and the prestressed ribs and the common reinforcing steel bars extend out of the prefabricated prestressed concrete openings Liang Duanmian and are directly anchored or indirectly anchored in the UHPC node core area;
the prefabricated prestressed concrete open-pore superposed beam; the prestressed tendons comprise pretensioned straight lines or folded line-shaped prestressed tendons;
the prefabricated prestressed concrete open-pore laminated beam is constructed and checked according to the prestressed concrete open-pore simply supported beam before the beam laminated layer, the plate laminated layer and the UHPC node core area are poured, and is calculated according to the frame beam after the UHPC node core area, the beam laminated layer and the plate laminated layer are poured; the section of the upper chord member of the hole opening of the precast prestressed concrete open-pore laminated beam is different from the section of the upper chord member of the hole opening after casting the laminated beam layer, the laminated slab layer and the UHPC node core area, the stress state is also different, and construction checking calculation is carried out on the upper chord member and the lower chord member of the hole opening of the precast prestressed concrete open-pore beam; for the unbonded prestressed perforated beam, calculating according to effective prestress in a normal use limit state, and considering the stress increment of unbonded ribs in a limit bearing limit state; for the slow bonding prestressed open-pore beam, the calculation is carried out according to the unbonded prestressed open-pore beam in the construction stage, and the calculation is carried out according to the bonded prestressed open-pore beam in the normal use limit state.
Further, the prefabricated prestressed concrete open-pore laminated beam consists of a prefabricated prestressed concrete open-pore beam and a beam laminated layer; the laminated slab consists of a precast concrete slab and a slab laminated layer poured on the slab.
Further, the bottom surface of the precast concrete upper column, the top surface of the precast concrete lower column and the end surface of the precast prestressed concrete open-pore superposed beam are all provided with inward concave grooves.
Further, the precast concrete upper column is fixed at the corresponding position by a reliable support.
Furthermore, stirrups in the precast concrete upper column, the precast concrete lower column and the precast prestressed concrete open-pore superposed beam are divided into an encryption area and a non-encryption area, and stirrups in the UHPC node core area are arranged according to design requirements.
Further, the top surfaces of the precast prestressed concrete perforated beam and the precast concrete slab are provided with a fur layer.
Compared with the prior art, the utility model has the advantages that:
1. the utility model combines the prefabricated concrete structure with the prestressed structure, and on the basis of utilizing the advantages of convenient and quick construction, good construction quality, energy conservation and environmental protection of the prefabricated structure, the combined prestressed structure can improve the service performance of the structure, reduce the section height of the component, lighten the dead weight and improve the anti-cracking performance of the component, thereby improving the anti-seismic performance of the integral frame structure.
2. The UHPC material with excellent performance is adopted and applied to the node core area, so that the reliable connection of the precast beam column components can be realized, the bearing capacity and the anti-seismic performance of the node can be improved, the anchoring length of the reinforcing steel bars and the prestressed reinforcing steel bars can be greatly reduced, the amount of the stirrups in the node core area can be remarkably reduced, the crowding of the reinforcing steel bars in the node core area is avoided, and the manufacturing, transporting and mounting efficiency of the precast beam column components is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a UHPC connected precast prestressed concrete open-cell beam frame structure system of the present utility model
FIG. 2 is a schematic view of a two-span frame structure of the present utility model
FIG. 3 is a schematic view of a two-truss frame construction material according to the present utility model
FIG. 4 is a detailed view of the intermediate layer frame edge node construction of the present utility model
FIG. 5 is an isometric view of an intermediate layer frame edge node of the present utility model
FIG. 6 is a detailed view of the construction of nodes in the intermediate layer frame of the present utility model
FIG. 7 is an isometric view of a node in the middle layer frame of the present utility model
Detailed Description
So that the manner in which the features, objects, and advantages of the utility model can be better understood, a more particular description of the utility model, briefly summarized below, may be had by reference to the appended drawings.
As shown in fig. 1-7, the prefabricated prestressed concrete open-pore frame structure system connected by UHPC comprises a prefabricated concrete upper column 1, a prefabricated concrete lower column 2, a prefabricated prestressed concrete open-pore superposed beam 3, a UHPC node core area 4 and a superposed plate 5;
an upper longitudinal main rib 6 is arranged in the precast concrete upper column 1, a lower longitudinal main rib 7 is arranged in the precast concrete lower column 2, a precast prestressed concrete perforated laminated beam 8 and a beam laminated layer 9 are arranged in the precast prestressed concrete perforated beam 3, a top through length reinforcing steel bar 12 is arranged in the beam laminated layer 9 of the precast prestressed concrete perforated beam 8, and the laminated plate 5 consists of a precast concrete slab 13 and a plate laminated layer 14 poured on the slab;
the upper longitudinal main ribs 6 extend out of the bottom surface of the precast concrete upper column 1 and are directly anchored in the UHPC node core area 4, the lower longitudinal main ribs 7 extend out of the top surface of the precast concrete lower column 2 and are directly anchored in the UHPC node core area 4, and the prestressed ribs 10 and the common steel bars 11 extend out of the end surface of the precast prestressed concrete perforated beam 8 and are directly anchored or bent and anchored in the UHPC node core area 4;
the precast prestressed concrete open-pore superposed beam 3 can also be a full precast prestressed concrete open-pore beam; the prestressed tendons 10 comprise pretensioned straight-line or broken-line prestressed tendons and straight-line, broken-line and curved prestressed tendons with bonding, unbonded and slow bonding after tensioning;
the prefabricated prestressed concrete open-pore laminated beam 3 is subjected to construction checking calculation according to a prestressed concrete open-pore simply supported beam before the beam laminated layer 9, the plate laminated layer 14 and the UHPC node core region 4 are poured, and is subjected to calculation according to a frame beam after the UHPC node core region 4, the beam laminated layer 9 and the plate laminated layer 14 are poured; the section of the upper chord member of the hole opening of the precast prestressed concrete open-pore laminated beam is different from the section of the upper chord member of the hole opening after casting the laminated beam layer, the laminated slab layer and the UHPC node core area, the stress state is also different, and construction checking calculation is carried out on the upper chord member and the lower chord member of the hole opening of the precast prestressed concrete open-pore beam; for the unbonded prestressed perforated beam, calculating according to effective prestress in a normal use limit state, and considering the stress increment of unbonded ribs in a limit bearing limit state; for the slow bonding prestress perforated beam, the calculation is carried out according to the unbonded prestress perforated beam in the construction stage, and the calculation is carried out according to the bonded prestress perforated beam in the normal use limit state;
the precast prestressed concrete open-pore laminated beam 3 consists of a precast prestressed concrete open-pore beam 8 and a beam laminated layer 9; the superimposed sheet 5 consists of a precast concrete slab 13 and a slab superimposed layer 14 poured on the slab;
hanging ribs (18) and reinforcing steel meshes (19) are arranged around the orifice of the precast prestressed concrete;
the bottom surface of the precast concrete upper column 1, the top surface of the precast concrete lower column 2 and the end surface of the precast prestressed concrete open-pore superposed beam 3 are provided with inward concave grooves;
the precast concrete upper column 1 is fixed at a corresponding position by a reliable support 15;
the non-encryption stirrups 16 in the precast concrete upper column 1, the precast concrete lower column 2 and the precast prestressed concrete open-pore superposed beam 3 are divided into an encryption area and a non-encryption area, the encryption stirrups 17 in the UHPC node core area 4 are arranged according to design requirements, the shearing resistance bearing capacity calculation of the core area is calculated according to a softened tension-compression bar model, steel fibers in the UHPC are equivalent to horizontal stirrups and vertical longitudinal ribs, and the shearing resistance contribution of the steel fibers to the node core area is considered;
the top surfaces of the precast prestressed concrete open-cell beam 8 and the precast concrete slab 13 are provided with a rough surface layer.
Claims (6)
1. The UHPC connected prefabricated prestressed concrete open-pore beam frame structure system comprises a prefabricated concrete upper column (1), a prefabricated concrete lower column (2), a prefabricated prestressed concrete open-pore superposed beam (3), a UHPC node core area (4) and a superposed slab (5);
the concrete pile is characterized in that an upper longitudinal main rib (6) is arranged in a precast concrete upper column (1), a lower longitudinal main rib (7) is arranged in a precast concrete lower column (2), a precast prestressed concrete perforated laminated beam (3) is internally provided with a precast prestressed concrete perforated beam (8) and a beam laminated layer (9), the precast prestressed concrete perforated beam (8) is provided with prestressed ribs (10) and common reinforcing steel bars (11), hanging ribs (18) and reinforcing steel bar meshes (19) are arranged around an orifice, a top through-length reinforcing steel bar (12) is arranged in the beam laminated layer (9), and the laminated plate (5) consists of a precast concrete slab (13) and a plate laminated layer (14) cast on the slab;
the upper longitudinal main ribs (6) extend out of the bottom surface of the precast concrete upper column (1) and are directly anchored in the UHPC node core area (4), the lower longitudinal main ribs (7) extend out of the top surface of the precast concrete lower column (2) and are directly anchored in the UHPC node core area (4), and the prestressed ribs (10) and the common reinforcing steel bars (11) extend out of the end surface of the precast prestressed concrete perforated beam (8) and are directly anchored or bent and anchored in the UHPC node core area (4);
the tendon (10) comprises a pretensioned straight or broken-line tendon.
2. The UHPC-connected precast prestressed concrete open-cell beam frame structure system according to claim 1, characterized in that the precast prestressed concrete open-cell composite beam (3) consists of a precast prestressed concrete open-cell beam (8) and a beam composite layer (9); the laminated slab (5) consists of a precast concrete slab (13) and a slab laminated layer (14) poured on the slab.
3. The UHPC connected prefabricated prestressed concrete open-cell beam frame structure system according to claim 1, wherein the bottom surface of the prefabricated concrete upper column (1), the top surface of the prefabricated concrete lower column (2) and the end surface of the prefabricated prestressed concrete open-cell superposed beam (3) are provided with sunken grooves.
4. A prefabricated prestressed concrete open-cell girder frame construction system for UHPC connection according to claim 1, characterized in that the prefabricated concrete upper column (1) is fixed in place with a reliable support (15).
5. The UHPC connected prefabricated prestressed concrete open-pore beam frame structure system according to claim 1, wherein the prefabricated concrete upper column (1), the prefabricated concrete lower column (2) and the non-encrypted stirrups (16) in the prefabricated prestressed concrete open-pore superposed beam (3) are arranged according to design requirements, and the encrypted stirrups (17) in the UHPC node core area (4).
6. The UHPC-connected precast prestressed concrete open-cell beam frame structure system according to claim 1, characterized in that the top surfaces of the precast prestressed concrete open-cell beam (8) and the precast concrete slab (13) are provided with a wool top layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121499559.5U CN220451087U (en) | 2021-06-30 | 2021-06-30 | UHPC (ultra high pressure) connected prefabricated prestressed concrete open-pore beam frame structure system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121499559.5U CN220451087U (en) | 2021-06-30 | 2021-06-30 | UHPC (ultra high pressure) connected prefabricated prestressed concrete open-pore beam frame structure system |
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| CN202121499559.5U Active CN220451087U (en) | 2021-06-30 | 2021-06-30 | UHPC (ultra high pressure) connected prefabricated prestressed concrete open-pore beam frame structure system |
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- 2021-06-30 CN CN202121499559.5U patent/CN220451087U/en active Active
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