CN220451081U - UHPC connected rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system - Google Patents
UHPC connected rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system Download PDFInfo
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- CN220451081U CN220451081U CN202121468937.3U CN202121468937U CN220451081U CN 220451081 U CN220451081 U CN 220451081U CN 202121468937 U CN202121468937 U CN 202121468937U CN 220451081 U CN220451081 U CN 220451081U
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- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 39
- 239000011148 porous material Substances 0.000 title claims abstract description 33
- 239000011374 ultra-high-performance concrete Substances 0.000 title abstract description 46
- 239000011178 precast concrete Substances 0.000 claims abstract description 64
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 17
- 210000002435 tendon Anatomy 0.000 claims description 24
- 239000004567 concrete Substances 0.000 claims description 18
- 238000013461 design Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 8
- 238000003475 lamination Methods 0.000 claims description 5
- 210000002268 wool Anatomy 0.000 claims 1
- 238000004873 anchoring Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 230000008901 benefit Effects 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009435 building construction Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004035 construction material Substances 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
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system connected by UHPC, which comprises a precast concrete upper column, a precast concrete lower column, a rear Zhang Huan bonded precast prestressed concrete open-pore laminated beam, a UHPC node core area and laminated plates. 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 common reinforcing steel bars extend out of the precast concrete openings Liang Duanmian and are directly 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 cracking resistance and the self-recovery performance of the components, thereby improving the anti-seismic performance 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 post Zhang Huan bonded prefabricated prestressed concrete open-pore beam frame structure system connected by UHPC 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. Because the prefabricated building has the advantages of high construction speed, industrialized production of components, field wet operation reduction, environmental pollution reduction and the like, has become the construction industry building construction Industrial process. 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. To improve the integrity and reliability of the node connection of the fabricated concrete frame, and to achieve or even exceed the earthquake-resistant performance of the cast-in-place concrete structure, a pre-stressing technique and UHPC material (Ultra High Performance Concrete, ultra-high performance concrete) are introduced into the fabricated structure.
The rear Zhang Huan bonded prestressed assembled concrete structure is formed by splicing prefabricated components together through tensioning prestressed tendons and has the characteristics of a rear prestressed bonded prestressed concrete structure and an assembled structure. 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. Upon unloading, the fracture may be partially or fully closed, 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.
UHPC has excellent bonding performance, and can greatly reduce the anchoring length of the steel bars and the steel strands in the UHPC; 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 post Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system connected by UHPC and a design and construction method thereof. The structure combines a rear Zhang Huan bonding prestress structure, an assembly structure and a superposed structure, and adopts UHPC high-performance materials, thereby achieving the purpose of improving the earthquake resistance of the prefabricated assembly type concrete frame structure.
The utility model has the advantages of mainly representing two aspects of the connection technology of the precast concrete open-pore 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. Therefore, the UHPC connected rear Zhang Huan bonding precast prestressed concrete open-pore beam frame structure system and the design and construction method thereof, the method accords with the green development strategy of the building industrialization in China.
The technical problems solved by the utility model can be realized by adopting the following technical scheme:
a rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system connected by UHPC comprises a precast concrete upper column, a precast concrete lower column, a rear Zhang Huan bonded precast prestressed concrete open-pore superposed beam, a UHPC node core area and a superposed plate;
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 rear Zhang Huan bonding precast prestressed concrete perforated laminated beam is internally provided with a precast concrete perforated beam, a beam laminated layer and a rear Zhang Huan bonding prestressed rib, the bottom of the precast concrete perforated beam is provided with common reinforcing steel bars, hanging ribs and reinforcing steel bar meshes can be arranged around the hole openings if necessary, the reinforcing steel bar meshes can be welded reinforcing steel bar meshes, a top through length reinforcing steel bar is arranged in the beam laminated layer, and the laminated plate consists of precast concrete slabs and plate laminated layers poured on the plates;
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 common reinforcing steel bars extend out of the precast concrete openings Liang Duanmian and are directly anchored in the UHPC node core area;
the slow-bonding prestressed tendons comprise straight lines, broken lines and curved prestressed tendons;
the slow-bonding prestressed tendons can be bonded, bonded or partially bonded, unbonded or unbonded in the node core area;
the rear Zhang Huan bonded precast prestressed concrete perforated laminated beam is constructed and checked according to a force transfer mode which is suitable for the ordinary concrete perforated simple beam and the support arrangement before a beam laminated layer, a plate laminated layer and a UHPC node core area are poured, and after the node core area, the beam laminated layer and the plate laminated layer are poured, the concrete strength of the node and the laminated layer meets the design requirement, and the stretching of the slow bonded prestressed tendons is carried out; after tensioning is completed, removing the support, and checking according to construction stages of the frame beams; the prefabricated prestressed concrete open-pore laminated beam is formed by casting a beam laminated layer the upper chord cross-section at the orifice is different before the slab stack and UHPC node core region are poured than after, the stress state is also different from that of the other parts, performing construction checking calculation on an upper chord and a lower chord at the orifice of the precast concrete perforated beam; when construction checking calculation is performed, calculation is performed according to unbonded prestressed tendons; and calculating according to the bonded prestressed tendons in the normal use limit state and the bearing capacity limit state.
Further, the rear Zhang Huan bonded precast prestressed concrete open-pore composite beam consists of a precast concrete open-pore beam, a beam composite layer and rear Zhang Huan bonded prestressed tendons.
Further, the rear Zhang Huan bonded prestressed tendons are pre-buried in the precast concrete perforated beam member according to the design position, penetrate through the UHPC node core area, extend out of the UHPC node core area from two ends, are fixedly provided with clamps and anchors respectively, one end of each anchor is arranged on the outer side of the column, and the other end of each anchor is arranged in the beam lamination layer.
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 rear Zhang Huan bonded 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.
Further, stirrups in the precast concrete upper column, the precast concrete lower column and the rear Zhang Huan bonded precast prestressed concrete open-pore laminated beam are divided into an encryption area and a non-encryption area, stirrups in a UHPC node core area are arranged according to design requirements, a shear-resistant bearing capacity in the core area is calculated according to a compression rod and truss model, steel fibers in the UHPC are equivalent to horizontal stirrups and vertical longitudinal ribs, the contribution of the steel fibers to the shear resistance of the node core area is considered, and the shearing-resistant beneficial contribution of the slow bonded prestressed ribs to the node is considered.
Further, the precast concrete perforated beam and the top surface of 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 rear Zhang Huan bonded prestressed structure, and utilizes the advantages of convenient and quick construction, good construction quality, energy conservation and environmental protection of the prefabricated structure, and the combined rear Zhang Huan bonded prestressed structure can improve the service performance of the structure, reduce the section height of the component, lighten the dead weight, improve the cracking resistance of the component and the self-recovery, thereby improving the anti-seismic performance of the integral frame structure. The post Zhang Huan bonding has the advantage of good durability, and solves the defect of non-compact post-tensioned bonded grouting. The unbonded prestressed tendons in the core area of the node provide self-resetting capability for the structure, enhance the integrity and the structural toughness of the structure and reduce the repair cost after earthquake.
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 steel bars and the steel strands can be greatly reduced, the amount of stirrups in the node core area can be remarkably reduced, the crowding of the steel bars in the node core area is avoided, and the manufacturing, transporting and installing efficiency of the precast beam column components is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a UHPC-based 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 rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system for UHPC connection comprises a precast concrete upper column 1, a precast concrete lower column 2, a rear Zhang Huan bonded precast prestressed concrete open-pore composite beam 3, a UHPC node core region 4 and a composite slab 17;
an upper longitudinal main rib 5 is arranged in the precast concrete upper column 1, a lower longitudinal main rib 6 is arranged in the precast concrete lower column 2, a rear Zhang Huan bonding precast prestressed concrete open-pore laminated beam 3 is internally provided with a precast concrete open-pore beam 7, a beam laminated layer 8 and a rear Zhang Huan bonding prestressed rib 9, the bottom of the precast concrete open-pore beam 7 is provided with a common reinforcing steel bar 10, a top through long reinforcing steel bar 11 is arranged in the beam laminated layer 8, and the laminated plate 17 consists of a precast concrete slab 18 and a plate laminated layer 19 poured on the plate;
the upper longitudinal main ribs 5 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 6 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 common reinforcing steel bars 10 extend out of the end surface of the precast concrete perforated beam 7 and are directly anchored in the UHPC node core area 4;
the slow-bonding prestressed tendons 9 comprise linear, broken-line and curved prestressed tendons;
the slow-bonding prestressed tendons 9 can be bonded, bonded or partially bonded, unbonded or unbonded in the node core area;
the rear Zhang Huan bonded precast prestressed concrete perforated laminated beam 3 is constructed and checked according to a force transmission mode which is suitable for the ordinary concrete perforated simple beam and the support setting before the beam laminated layer 8, the plate laminated layer 19 and the UHPC node core area 4 are poured, and after the UHPC node core area 4, the beam laminated layer 8 and the plate laminated layer 19 are poured, the concrete strength of the node and the laminated layer meets the design requirement, and the slow bonded prestressed tendons 9 are tensioned; after tensioning is completed, removing the support, and checking according to construction stages of the frame beams; 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 before 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 concrete open-pore beam; when construction checking calculation is performed, calculation is performed according to unbonded prestressed tendons; calculating according to the bonded prestressed tendons in a normal use limit state and a bearing capacity limit state;
the rear Zhang Huan bonded precast prestressed concrete open-pore laminated beam 3 consists of a precast concrete open-pore beam 7, a beam laminated layer 8 and rear Zhang Huan bonded prestressed tendons 9; the superimposed sheet 17 consists of a precast concrete panel 18 and a sheet laminate 19 poured on the panel;
the rear Zhang Huan bonding prestressed tendons 9 are pre-buried in the precast concrete perforated beam 7 component according to the design position, penetrate through the UHPC node core region 4, extend out of the UHPC node core region 4 at two ends, are fixedly provided with a clamp 15 and an anchor 16 respectively, and are arranged at one end outside a column and at the other end in a beam overlapping layer;
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 rear Zhang Huan bonded precast prestressed concrete open-pore superposed beam 3 are all provided with inward concave grooves;
the precast concrete perforated beam is provided with hanging ribs (20) and reinforcing steel meshes (21) around the orifice;
the precast concrete upper column 1 is fixed at a corresponding position by a reliable support 12;
the pre-cast concrete upper column 1, the pre-cast concrete lower column 2 and the rear Zhang Huan are bonded, the non-encryption area stirrups 13 in the pre-cast prestressed concrete open-pore superposed beam 3 are divided into encryption areas and non-encryption areas, the encryption area stirrups 14 in the UHPC node core area 4 are arranged according to design requirements, the shearing resistance bearing capacity of the core area is calculated according to an inclined pressure rod and truss model, steel fibers in the UHPC are equivalent to horizontal stirrups and vertical longitudinal ribs, the shearing resistance contribution of the steel fibers to the node core area is considered, and the shearing resistance beneficial contribution of the slow-bonding prestress ribs to the nodes is considered;
the precast concrete aperture beam 7 and the top surface of the precast concrete panel 18 are provided with a fur layer.
While the utility model has been described above by way of example only, it will be apparent that the utility model is not limited to the particular embodiments described, i.e., it is not limited thereto, but is susceptible to various modifications, changes or substitutions without departing from the spirit and scope of the present utility model.
Claims (7)
1. The rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system connected by UHPC comprises a precast concrete upper column (1), a precast concrete lower column (2), a rear Zhang Huan bonded precast prestressed concrete open-pore laminated beam (3), a UHPC node core area (4) and a laminated slab (17);
the concrete pile is characterized in that an upper longitudinal main rib (5) is arranged in a precast concrete upper column (1), a lower longitudinal main rib (6) is arranged in a precast concrete lower column (2), a precast concrete open-pore beam (7), a beam laminated layer (8) and a rear Zhang Huan binding prestressed rib (9) are arranged in a rear Zhang Huan binding precast prestressed concrete open-pore laminated beam (3), a common reinforcing steel bar (10) is arranged at the bottom of the precast concrete open-pore beam (7), hanging ribs (20) and reinforcing steel bar meshes (21) are arranged around an orifice, a top through-length reinforcing steel bar (11) is arranged in the beam laminated layer (8), and a laminated plate (17) consists of a precast concrete slab (18) and a plate laminated layer (19) poured on the slab;
the upper longitudinal main ribs (5) 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 (6) 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 common reinforcing steel bars (10) extend out of the end surface of the precast concrete perforated beam (7) and are directly anchored in the UHPC node core area (4);
the slow-bonding prestressed tendons (9) comprise straight-line, broken-line and curved-shaped prestressed tendons;
after the UHPC node core area (4), the beam lamination layer (8) and the plate lamination layer (19) are poured, the concrete strength of the node and the lamination layer reach the design requirement, and the stretching of the slow-bonding prestressed tendons (9) is carried out; and after tensioning is completed, the support is removed.
2. The UHPC connected rear Zhang Huan bonded precast prestressed concrete open cell beam frame structure system of claim 1, wherein the rear Zhang Huan bonded precast prestressed concrete open cell composite beam (3) consists of precast concrete open cell beams (7), beam composite layers (8) and rear Zhang Huan bonded prestressed tendons (9); the laminated slab (17) consists of a precast concrete slab (18) and a slab laminated layer (19) poured on the slab.
3. The post Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system connected by a UHPC (ultra high pressure) according to claim 1, wherein the post Zhang Huan bonded prestressed tendons (9) are pre-embedded in the precast concrete open-pore beam (7) component according to the design position and pass through the UHPC node core region (4) and the two ends extend out of the UHPC node core region (4), the two ends of the post are respectively fixedly provided with a clamp (15) and an anchor (16), one end of the post is arranged outside a column, and the other end of the post is arranged in a beam lamination layer.
4. The post Zhang Huan bonded precast prestressed concrete open-cell beam frame structure system of a UHPC connection according to claim 1, wherein 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 post Zhang Huan bonded precast prestressed concrete open-cell composite beam (3) are provided with recessed grooves.
5. The UHPC-connected rear Zhang Huan bonded precast prestressed concrete open-cell beam frame structure system of claim 1, characterized in that the precast concrete upper column (1) is fixed in the corresponding position with a reliable support (12).
6. The post Zhang Huan bonded precast prestressed concrete open-cell beam frame structure system of a UHPC joint according to claim 1, wherein the precast concrete upper column (1), the precast concrete lower column (2) and the post Zhang Huan are bonded with non-encrypted zone stirrups (13) in the precast prestressed concrete open-cell composite beam (3), and the encrypted zone stirrups (14) in the UHPC joint core zone (4) are arranged according to design requirements.
7. The UHPC joined rear Zhang Huan bonded precast prestressed concrete open-cell beam frame structure system of claim 1, wherein the top surfaces of said precast concrete open-cell beam (7) and said precast concrete panel (18) are provided with a wool top layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121468937.3U CN220451081U (en) | 2021-06-30 | 2021-06-30 | UHPC connected rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121468937.3U CN220451081U (en) | 2021-06-30 | 2021-06-30 | UHPC connected rear Zhang Huan bonded precast prestressed concrete open-pore beam frame structure system |
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