CN109881777B - Assembled high-toughness cement-based composite material beam column joint - Google Patents
Assembled high-toughness cement-based composite material beam column joint Download PDFInfo
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- CN109881777B CN109881777B CN201910164589.1A CN201910164589A CN109881777B CN 109881777 B CN109881777 B CN 109881777B CN 201910164589 A CN201910164589 A CN 201910164589A CN 109881777 B CN109881777 B CN 109881777B
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- 239000004568 cement Substances 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 111
- 239000000463 material Substances 0.000 claims abstract description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 29
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 239000004567 concrete Substances 0.000 claims description 15
- 239000011148 porous material Substances 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims 3
- 239000011178 precast concrete Substances 0.000 claims 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 24
- 239000010959 steel Substances 0.000 abstract description 24
- 238000010276 construction Methods 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000835 fiber Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The invention discloses an assembled high-toughness cement-based composite material beam column node which comprises a precast reinforced concrete beam and a precast reinforced concrete column, wherein the precast reinforced concrete beam and the precast reinforced concrete column are connected through pre-buried unequal limb U-shaped steel bars of an overhanging section, connecting sleeves of reserved steel bars of the beam and the column and an I-shaped post-pouring area of the high-toughness cement-based composite material, and the precast reinforced concrete column is used for pouring the high-toughness cement-based composite material in a node core area. By means of the construction treatment of the node core area, the cantilever section and the overhanging section and the utilization of new materials, the invention can realize crack control, improve the shear strength of the node, improve the ductility level and the energy consumption capacity and the anti-seismic requirement of a strong-node weak component, can greatly improve the field construction quality and the construction efficiency, and has wide application prospect.
Description
Technical Field
The invention belongs to the field of prefabricated reinforced concrete beam-column joints, and particularly relates to an assembled high-toughness cement-based composite beam-column joint.
Background
The assembled structure is mainly formed by connecting prefabricated assembled components of a factory in site through safety and efficiency, and has the characteristics of environmental protection, high efficiency, energy saving, reliable quality and less influence of seasons and climates; the beam column nodes are used for transmitting and distributing force in a structural system, a force-bearing and force-transmitting mechanism is complex, and the effectiveness of the nodes often becomes a key factor for determining whether a concrete frame structure collapses and breaks under the action of an earthquake; the node connection of the assembly type structure is a weak link of the assembly type structure system, and is a key link for ensuring the safety and reliability of the assembly type structure system.
The outstanding problems of the prior fabricated concrete beam column node are that the beam column connecting area lacks good connecting performance, so that the beam column connecting link is weak, the concrete crack appears early, and the site construction process is complex; meanwhile, the shear resistance of the node core area is rapidly degraded due to the early occurrence of the plastic hinge of the beam end, the control capability of node damage is not guaranteed, and the ductility and the energy consumption capability of the structure under the earthquake effect are insufficient.
Disclosure of Invention
The invention aims to overcome the defects of the prior art in the above factors and provide a novel assembled beam column node which is safer and more reliable, greatly improves the ductility and energy consumption capability of the node, and is efficient and convenient to construct.
The utility model provides an assembled high toughness cement-based composite beam column node which characterized in that: the reinforced concrete column comprises a reinforced concrete precast beam and a reinforced concrete precast column, wherein the reinforced concrete precast beam comprises a reinforced concrete precast left beam (1) and a reinforced concrete precast right beam (2), the reinforced concrete precast column comprises a reinforced concrete precast lower column (3), a reinforced concrete precast upper column (4) and a reinforced concrete precast high-toughness cement-based composite material node core region (5), a first overhanging section (20) with a reduced cross section size is arranged at the end part of the reinforced concrete precast beam, a cantilever section (23) extending out of the column cross section and a second overhanging section (21) with a reduced cross section size are arranged at the connecting part of the reinforced concrete precast node core region (5) and the reinforced concrete precast upper column (4) and the reinforced concrete precast lower column (3); the upper end and the lower end of the prefabricated high-toughness cement-based composite material node core area (5) are respectively connected with grooves of the prefabricated reinforced concrete upper column (4) and the prefabricated reinforced concrete lower column (3) through a third outer extending section (22), and stud end bolts (18) are fastened with the prefabricated reinforced concrete column through corresponding bolt pore canals;
further, the overhanging section of the reserved upper steel bar (8) of the prefabricated high-toughness cement-based composite material node core area is connected with the corresponding overhanging parts of the reserved upper steel bar (7) of the left and right prefabricated reinforced concrete beams through an upper steel bar grouting sleeve (14), the overhanging section of the reserved upper steel bar (12) of the prefabricated high-toughness cement-based composite material node core area is connected with the corresponding overhanging parts of the reserved upper steel bar (9) of the left and right prefabricated concrete beams through a lower steel bar grouting sleeve (15), the embedded unequal limb U-shaped steel bars (11) of the second overhanging section of the prefabricated high-toughness cement-based composite material node core area are connected with the embedded unequal limb U-shaped steel bars (10) of the first overhanging section of the corresponding left and right prefabricated reinforced concrete beams through an unequal limb U-shaped steel bar grouting sleeve (13), and the post-cast part between the prefabricated high-toughness cement-based composite material node core area (5) and the left and right prefabricated reinforced concrete beams is the post-cast high-toughness cement-based composite material area (6).
Further, the assembled high-toughness cement-based composite material beam column node is characterized in that: the prefabricated reinforced concrete upper column (4), the prefabricated reinforced concrete lower column (3) and the prefabricated high-toughness cement-based composite material node core area (5) are integrally manufactured.
Further, the first outer extending section (20) is provided with a first outer extending section reinforcing steel hoop (16) for restraining, an outer extending prefabricated reinforced concrete beam reserved upper reinforcing steel bar (7) is arranged on the upper portion of the prefabricated reinforced concrete beam, an outer extending prefabricated reinforced concrete beam reserved upper reinforcing steel bar (9) is arranged on the lower portion of the prefabricated reinforced concrete beam, and the outer extending lengths of the outer extending reinforced concrete beam reserved upper reinforcing steel bar (7) and the outer extending length of the outer extending reinforced concrete beam reserved upper reinforcing steel bar (9) are different.
Further, the end part of the first outer extending section (20) is provided with a first outer extending section embedded unequal limb U-shaped reinforcing steel bar (10), the end part of the second outer extending section (21) is provided with a second outer extending section embedded unequal limb U-shaped reinforcing steel bar (11), and the second outer extending section (21) is provided with a second outer extending section reinforcing steel bar hoop (17) for restraining.
Furthermore, the joint part of the prefabricated high-toughness cement-based composite material node core area (5) and the prefabricated reinforced concrete upper column (4) and the prefabricated reinforced concrete lower column (3) is provided with a third outer extension section (22) with reduced cross section size, the third outer extension section (22) is restrained by a third outer extension section reinforcing steel hoop (19), and a pore channel which can be inserted into a column end bolt (18) is reserved in the third outer extension section.
The prefabricated reinforced concrete upper column (4) and the prefabricated reinforced concrete lower column (3) are provided with grooves, and channels which can be inserted into the column end bolts (18) are reserved at corresponding positions.
It should be noted that, the first overhanging section (21) with reduced cross-sectional size of the precast reinforced concrete beam and the second overhanging section (22) with reduced cross-sectional size of the precast high-toughness cement-based composite material node core area are beneficial to improving the bonding performance between the precast reinforced concrete beam and the post-cast material and between the precast high-toughness cement-based composite material node core area (5) and the post-cast material due to the fact that the overhanging sections increase the contact area with the post-cast material, and the cantilever section (23) of the precast high-toughness cement-based composite material node core area (5) extending out of the column section can avoid the premature formation of the beam end plastic hinge at the column section, and meanwhile, the high energy consumption performance of the high-toughness cement-based composite material is utilized to improve the energy consumption capability of the node.
It should be noted that, the whole prefabricated reinforced concrete column is prefabricated by the mill, the prefabrication process is to tie the reinforcing steel bars first, after the prefabrication of the upper column of the prefabricated reinforced concrete and the lower column of the prefabricated reinforced concrete is completed and the initial setting state is reached, the prefabrication of the prefabricated high-toughness cement-based composite material node core area (5) is completed by adopting the high-toughness cement-based composite material, and the prefabricated high-toughness cement-based composite material node core area is made into a whole, so that the weakening influence of the cutting of the reinforcing steel bars in the column on the stress performance of the column can be effectively prevented, and the realization of 'strong column and weak beam' is facilitated.
It should be noted that the overhanging lengths of the reserved portion steel bars (9) of the precast reinforced concrete beam and the reserved upper portion steel bars (7) of the precast reinforced concrete beam are different, and the unequal limbs of the U-shaped steel bars can effectively prevent the cross section formed by sleeve connection from being broken due to a through post-pouring weak surface with larger rigidity, so that good stress performance of beam column nodes is ensured.
It should be noted that after the prefabricated high-toughness cement-based composite node core area (5) is respectively embedded with the prefabricated reinforced concrete lower column (3) and the prefabricated reinforced concrete upper column (4), the third outer extending section (22) is fastened with the groove by adopting the column end bolt (18), so that the situation that two materials are stressed independently to form two sheets in the stress process due to insufficient binding force between the high-toughness cement-based composite and the concrete material can be effectively avoided, the two materials are stressed together, and the expected stress effect is achieved.
It should be noted that, because the cross-section sizes of the first overhanging section (20), the second overhanging section (21) and the third overhanging section (22) are smaller, the first overhanging section steel hoop (16), the second overhanging section steel hoop (17) and the third overhanging section steel hoop (18) are adopted to restrict the cross section of the first overhanging section steel hoop to improve the material strength, and simultaneously provide lateral support for the first overhanging section, so that breakage or breaking caused in the transportation, pouring and stressing processes due to the reduction of the cross-section sizes can be effectively avoided, in addition, the binding force formed by the steel hoops and the post-pouring material due to the mechanical snap force can enhance the binding force between the prefabricated parts and the cast-in-situ material, the overhanging section of the prefabricated high-toughness cement-based composite material node core region (5) is not in direct contact with the overhanging section of the prefabricated beam, and is connected through a threaded sleeve between a pair of pre-embedded unequal U-shaped steel bars; the prefabricated reinforced concrete beam and the prefabricated high-toughness cement-based composite material node core area (5) can be better connected through the connection of the post-cast high-toughness cement-based composite material to the two extension section gaps and the connection between the U-shaped reinforcing steel bars, and the I-shaped post-cast area formed by casting the high-toughness cement-based composite material can effectively avoid premature cracking of the connection after being subjected to bending action by utilizing the high tensile toughness of the high-toughness cement-based composite material.
Compared with the prior art, the invention has the following gain effects: the prefabricated reinforced concrete column with complex connection construction measures is realized by accurate integral casting of factory running water, quality difference and overlarge error caused by site construction and construction conditions are avoided, (2) the joints of the prefabricated reinforced concrete beam and the column are connected through the threaded sleeve and the effective construction measures of the post-cast area, on one hand, the construction process is simple, on the other hand, the prefabricated concrete beam and the column can be effectively connected, premature generation and development of cracks are avoided, and (3) the prefabricated reinforced concrete core area can effectively avoid the generation of slow down cracks and plastic hinges through the cantilever section, the overhanging section and the design of the construction measures, thereby being beneficial to improving the ductility and the energy consumption capability of the joints, greatly improving the earthquake resistance of the prefabricated assembled beam and column joints under the earthquake action, and realizing good control of the destruction function.
Further details will be described below with reference to the accompanying drawings.
Drawings
Figure 1 is a front cross-sectional view of an assembled high-toughness cement-based composite beam column joint,
figure 2 is a front cross-sectional view of a precast reinforced concrete column,
figure 3 is a front cross-sectional view of a core region of a node of a prefabricated high-toughness cement-based composite material,
figure 4 is a front cross-sectional view of a precast reinforced concrete lower column,
figure 5 is a front cross-sectional view of a precast reinforced concrete upper column,
figure 6 is a left Liang Zhengmian cross-sectional view of the precast reinforced concrete,
fig. 7 is a right Liang Zhengmian cross-sectional view of the precast reinforced concrete.
In the figure, 1, a left precast reinforced concrete beam, 2, a right precast reinforced concrete beam, 3, a lower precast reinforced concrete column, 4, an upper precast reinforced concrete column, 5, a node core area of a precast high-toughness cement-based composite material, 6, a post-cast area of the high-toughness cement-based composite material, 7, a reserved upper reinforcing steel bar of the precast reinforced concrete beam, 8, a reserved upper reinforcing steel bar of the node core area of the precast high-toughness cement-based composite material, 9, a reserved upper reinforcing steel bar of the precast reinforced concrete beam, 10, a pre-embedded unequal limb 'U' -shaped reinforcing steel bar of a first overhanging section, 11, a pre-embedded unequal limb 'U' -shaped reinforcing steel bar of a second overhanging section, 12, a reserved lower reinforcing steel bar of the precast high-toughness cement-based composite material, 13, an unequal limb 'U' -shaped reinforcing steel bar grouting sleeve, 14, an upper reinforcing steel bar grouting sleeve, 15, a lower reinforcing steel bar grouting sleeve, 16, a first overhanging section reinforcing steel bar hoop, 17, a second overhanging section reinforcing steel bar hoop, 18, a column end bolt, 19, a third overhanging section hoop, 20, a first overhanging section, 21, a second overhanging section, 22, a third overhanging section, 23 and a cantilever.
Detailed Description
The following detailed description of the invention is provided as an exemplary and explanatory only and should not be taken as limiting the scope of the invention, as described in detail in connection with the accompanying drawings. Furthermore, those skilled in the art will recognize from the description of the document that features of embodiments of the present document and of embodiments of different documents may be combined accordingly.
The utility model provides an assembled high toughness cement-based composite beam column node which characterized in that: the reinforced concrete beam comprises a left reinforced concrete beam (1) and a right reinforced concrete beam (2), the reinforced concrete column comprises a lower reinforced concrete column (3), an upper reinforced concrete column (4) and a core area (5) of a high-toughness cement-based composite material node, a first overhanging section with a reduced cross section size is arranged at the end part of the reinforced concrete beam, a cantilever section and a second overhanging section with a reduced cross section size are arranged at the connecting area of the core area of the high-toughness cement-based composite material node and the left and right reinforced concrete beams, and a third overhanging section with a reduced cross section size is arranged at the connecting position of the core area (5) of the high-toughness cement-based composite material node and the upper reinforced concrete column (4) and the lower reinforced concrete column (3); the upper end and the lower end of the prefabricated high-toughness cement-based composite material node core area (5) are respectively connected with grooves of the prefabricated reinforced concrete upper column (4) and the prefabricated reinforced concrete lower column (3) through third outer extending sections, and stud end bolts (18) are used for fastening the prefabricated reinforced concrete column through corresponding bolt pore canals;
the outer extending sections of the reserved upper reinforcing bars (8) of the prefabricated high-toughness cement-based composite material node core area are connected with the corresponding outer extending parts of the reserved upper reinforcing bars (7) of the left and right prefabricated reinforced concrete beams through upper reinforcing bar grouting sleeves (14), the outer extending sections of the reserved upper reinforcing bars (12) of the prefabricated high-toughness cement-based composite material node core area are connected with the corresponding outer extending parts of the reserved upper reinforcing bars (9) of the left and right prefabricated concrete beams through lower reinforcing bar grouting sleeves (15), the second outer extending sections of the prefabricated high-toughness cement-based composite material node core area are embedded with unequal-limb U-shaped reinforcing bars (11) corresponding to the first outer extending sections of the left and right prefabricated reinforced concrete beams and the corresponding unequal-limb U-shaped reinforcing bars (10) of the first outer extending sections of the left and right prefabricated reinforced concrete beams are connected through unequal-limb U-shaped reinforcing bar grouting sleeves (13), and the' I-shaped gap between the high-toughness cement-based composite material node core area (5) and the left and right prefabricated reinforced concrete beams is a high-toughness cement-based composite material post-poured area (6).
The construction process comprises the following steps:
step 1: prefabricating the reinforced concrete column. Binding reinforcement cages in the process of prefabricating reinforced concrete in a factory, paying attention to unequal lengths of reserved reinforcement bars of beams of cantilever sections in a core area, reserving bolt pore channels at corresponding positions of an upper column and a lower column, arranging rectangular reinforcement hoops at proper positions, arranging U-shaped reinforcement bars with unequal limbs of the outer sections, supporting molds at the positions of the upper column and the lower column, pouring concrete, and vibrating; and after the concrete reaches initial setting, pouring and vibrating the high-toughness cement-based composite material, and after the high-toughness fiber reinforced cement-based material reaches final setting, sequentially passing the bolts through the grooves of the upper column or the lower column and the reserved pore canal of the third outer extension section of the high-ductility cement-based composite material node core area, and fastening the nuts.
Step 2: and prefabricating the reinforced concrete beam. The method comprises the steps of firstly binding reinforcing bars of a prefabricated reinforced concrete beam in a factory, paying attention to the fact that the lengths of reserved reinforcing bars at the upper part and reserved reinforcing bars at the lower part of the beam are different, but the reserved reinforcing bars are corresponding to reserved reinforcing bars in a core area, arranging U-shaped reinforcing bars and rectangular reinforcing bar hoops with unequal limbs of the outer extending sections at proper positions, supporting a mould of the prefabricated reinforced concrete beam, and completing pouring and vibrating of concrete.
Step 3: positioning and installing the precast reinforced concrete column (3) and the precast reinforced concrete left beam (1) and right beam (3), arranging stirrups at proper positions of the post-cast strip, carrying out sleeve connection on corresponding longitudinal steel bars and U-shaped steel bars of unequal limbs, then carrying out formwork supporting on the post-cast strip part, pouring high-toughness cement-based composite materials, and carrying out proper vibration to realize the node connection of the precast beam column.
The high tensile strength, tensile strain hardening and good crack control capability of the high-toughness cement-based composite material are utilized, so that the crack development conditions of the beam column end part, the node core area and the post-cast area can be effectively improved, and the bending and shearing bearing capacity of the component is improved; the energy consumption capability of the node can be effectively improved by utilizing the characteristic of high energy consumption of the high-toughness cement-based composite material; the arrangement of the cantilever section in the column can delay the damage of the node core area, so that the anti-seismic fortification requirement of a strong node weak component is realized; the beam end and the column end can effectively improve the bonding performance between materials and prevent the formation of a weak section by arranging the outer extending section, the U-shaped unequal leg steel bars, the rectangular steel bar hoops, the bolts for connection, the unique I-shaped post-pouring area and other constructional measures; the complex manufacturing processes of the prefabricated reinforced concrete columns and the prefabricated reinforced concrete beams are finished in a factory through running, the on-site construction is only needed to be performed through sleeve connection and pouring of post-pouring areas, the construction process is simple, the quality is easy to control, and the construction work efficiency is greatly improved.
In the above embodiment, the high-toughness cement-based composite material comprises cement, fly ash, fine sand, PVA fiber, a water reducing agent and water, wherein the water comprises the following components in percentage by mass: and (3) cement: fly ash: fine sand: water reducer = 0.24:0.4:0.6:0.46:0.001; the volume doping amount of PVA fiber is 1.7%.
Dry-mixing the weighed cement, fly ash and quartz sand for 1-3 minutes, adding the weighed water reducer and 75% water, and stirring to a plastic flowing state; and then adding the rest 25% of water, stirring for 3-5 minutes, slowly scattering PVA fibers, and stirring uniformly to obtain the high-toughness cement-based composite material.
The portions of the present embodiment not specifically described are common general knowledge and known techniques in the art, and will not be described in detail here.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (5)
1. The utility model provides an assembled high toughness cement-based composite beam column node which characterized in that: including prefabricated reinforced concrete roof beam and prefabricated reinforced concrete column, prefabricated reinforced concrete roof beam including prefabricated reinforced concrete left side roof beam (1) and prefabricated reinforced concrete right side roof beam (2), prefabricated reinforced concrete column including prefabricated reinforced concrete down post (3), prefabricated reinforced concrete up-column (4) and prefabricated high toughness cement-based composite material node core district (5), prefabricated reinforced concrete roof beam's tip have first overhanging section (20) that cross-section size reduces, prefabricated high toughness cement-based composite material node core district (5) and left and right prefabricated reinforced concrete roof beam continuous region have cantilever section (23) and the second outside extension section (21) that cross-section size reduces of stretching out the post cross-section, prefabricated high toughness cement-based composite material node core district (5) with prefabricated reinforced concrete up-column (4), prefabricated reinforced concrete down-column (3) junction have the third overhanging section (22) that cross-section size reduces, high toughness cement-based composite material node core district (5) upper end and lower extreme respectively through third section (22) with the prefabricated concrete up-column (4) down-column's the second outside extension section (21), prefabricated concrete up-column (8) on the prefabricated concrete column (3) the hole of the prefabricated section, the prefabricated concrete column (8) on the hole is passed through, the prefabricated concrete column (8) is connected to the prefabricated section, the prefabricated section is connected with the prefabricated section hole The upper portion reinforcing bar (7) is reserved to right precast reinforced concrete roof beam corresponds overhanging portion and is connected through upper portion reinforcing bar grout sleeve (14), precast high toughness cement base combined material node core district in advance left and right precast concrete roof beam in advance left and right reinforcing bar (9) correspond overhanging portion and be connected through lower portion reinforcing bar grout sleeve (15), precast high toughness cement base combined material node core district second ex-trusion pre-buried unequal limb "U" shape reinforcing bar (11) with correspond left and right precast reinforced concrete roof beam first ex-trusion pre-buried unequal limb "U" shape reinforcing bar (10) be connected through unequal limb "U" shape reinforcing bar grout sleeve (13), precast high toughness cement base combined material node core district (5) with left and right precast concrete roof beam between "worker" shape post-cast portion be high toughness cement base combined material post-cast region (6), first ex-trusion section (20) have first ex-trusion hoop (16) to retrain, second ex-trusion section (21) have reinforcing bar (19) to retrain, third ex-trusion section (17) have.
2. A fabricated high-toughness cement-based composite beam-column joint as claimed in claim 1, wherein: the prefabricated reinforced concrete upper column (4), the prefabricated reinforced concrete lower column (3) and the prefabricated high-toughness cement-based composite material node core area (5) are integrally manufactured.
3. A fabricated high-toughness cement-based composite beam-column joint as claimed in claim 1, wherein: the upper portion of the precast concrete beam is provided with an overhanging precast reinforced concrete beam reserved upper portion reinforcing steel bar (7), the lower portion of the precast reinforced concrete beam is provided with an overhanging precast reinforced concrete beam reserved portion reinforcing steel bar (9), and the overhanging length of the precast reinforced concrete beam reserved upper portion reinforcing steel bar (7) and the overhanging length of the precast reinforced concrete beam reserved portion reinforcing steel bar (9) are different.
4. A fabricated high-toughness cement-based composite beam-column joint as claimed in claim 1, wherein: the end part of the first outer extending section (20) is provided with a first outer extending section embedded unequal limb U-shaped reinforcing steel bar (10), and the end part of the second outer extending section (21) is provided with a second outer extending section embedded unequal limb U-shaped reinforcing steel bar (11).
5. A fabricated high-toughness cement-based composite beam-column joint as claimed in claim 1, wherein: the connecting part of the prefabricated high-toughness cement-based composite material node core area (5) and the prefabricated reinforced concrete upper column (4) and the prefabricated reinforced concrete lower column (3) is provided with a third extending section (22) with a reduced section size, and a pore canal capable of being inserted into a stud end bolt (18) is reserved in the third extending section (22).
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| CN201910164589.1A CN109881777B (en) | 2019-03-05 | 2019-03-05 | Assembled high-toughness cement-based composite material beam column joint |
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| CN109881777B true CN109881777B (en) | 2024-03-22 |
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