CN114319580B - PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by core steel pipes and manufacturing method - Google Patents
PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by core steel pipes and manufacturing method Download PDFInfo
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Abstract
The invention provides a PVC-FRP pipe restrained concrete column-reinforced concrete double-beam through node connected by a core steel pipe and a manufacturing method thereof, which relate to the field of civil engineering structures and comprise a PVC-FRP pipe, a core steel pipe, an annular steel plate, a longitudinal connecting bolt, a shearing ring rib, a concrete column, a column longitudinal rib, a column stirrup, a node stirrup, a reinforced concrete double-beam longitudinal rib, a beam stirrup, beam concrete, a beam connecting web structural stirrup, a beam connecting web metal damping device, a node area transverse structural reinforcing steel bar and a node area longitudinal structural reinforcing steel bar; and because the core steel pipe can bear partial axial force and horizontal shearing force, compared with a common reinforced concrete node, the anti-seismic performance of the reinforced concrete node is improved without arranging excessive horizontal stirrups and constructional steel bars, the longitudinal beam bars can penetrate through the node area, cumbersome anchoring measures of the longitudinal beam bars in the column are reduced, and the reinforced concrete node is simple and convenient to manufacture.
Description
Technical Field
The invention relates to the field of civil engineering structures, in particular to a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by core steel pipes and a manufacturing method.
Background
Along with the development of social economy, various large-span and super high-rise structures are more and more, the steel pipe concrete column is widely applied due to the advantages of light dead weight, high bearing capacity, convenient construction and the like, but the steel pipe concrete column has the defects of easy corrosion, unstable bonding between the surface of a steel pipe and concrete and the like, and is difficult to be connected with a reinforced concrete beam.
The PVC-FRP pipe constraint concrete column formed by taking the PVC pipe wrapped with the FRP strips as a template for pouring concrete has the same advantages as a steel pipe concrete column, has stronger corrosion resistance and durability and wide application prospect, and when the PVC-FRP pipe constraint concrete column is connected with a reinforced concrete beam, the PVC-FRP pipe is disconnected in a node area, so that the node bearing capacity and the integrity of the PVC-FRP pipe constraint concrete column are obviously reduced, a core steel pipe can be built in the node area to enhance the node bearing capacity and the rigidity, but the existence of the core steel pipe possibly leads the longitudinal steel bar of the reinforced concrete beam to penetrate the node area, and research shows that the bonding performance between the longitudinal steel bar and the concrete is reduced, further the force transmission performance of the node is reduced, and the bonding damage occurs in advance in the node area.
Disclosure of Invention
The invention aims to provide a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by a core steel pipe and a manufacturing method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the PVC-FRP pipe restrained concrete column-reinforced concrete double-beam through node comprises a PVC-FRP pipe, a core steel pipe, an annular steel plate, a longitudinal connecting bolt, a shearing-resistant annular rib, a concrete column, a column longitudinal rib, a column stirrup, a node stirrup, a reinforced concrete double-beam longitudinal rib, a beam stirrup, beam concrete, a beam connecting web construction stirrup, a beam connecting web metal damping device, a node area transverse construction reinforcing steel bar and a node area longitudinal construction reinforcing steel bar.
Preferably, the PVC-FRP pipe is disconnected in the node area, the distance between the end parts of the PVC-FRP pipe and the node area is 5-10mm, the concrete column and the column longitudinal ribs penetrate through the whole node core area, the core steel pipe is internally arranged in the node area concrete, the ratio of the outer diameter of the core steel pipe to the diameter of the node core area is less than 0.5, and the two ends of the core steel pipe extend into the upper column and the lower column respectively by 100mm.
Preferably, the annular steel plates are welded on the periphery of the core steel pipe in advance, the annular steel plates are connected through longitudinal connecting bolts, the shearing ring ribs are welded on the outer wall of the core steel pipe in advance, and the shearing ring ribs are threaded steel bars.
Preferably, the reinforced concrete double beams have the same size, and the beam longitudinal ribs comprise an upper row or a lower row or two rows, and each row comprises a plurality of longitudinal ribs, wherein a side beam longitudinal rib close to the core steel pipe is welded on the shearing ring rib at the periphery of the core steel pipe.
Preferably, the web plate of the connecting beam is arranged every 500-1000mm, the thickness of the web plate is 80-120mm, and the structural stirrups of the web plate of the connecting beam are at least 2, and are in lap joint and binding with the longitudinal steel bars of the double beams; and a metal damping device is arranged in the web plate of the connecting beam.
Preferably, the transverse constructional steel bars in the node area are at least provided with 4 channels, 2 channels are respectively arranged at the longitudinal bars at the top of the beam and the longitudinal bars at the bottom of the beam, and the two ends of the transverse constructional steel bars are in a hook shape and are in lap joint binding with the longitudinal bars of the beam; the longitudinal constructional steel bars in the node area are at least provided with 4 channels, 2 channels are respectively arranged at the longitudinal steel bars at the top of the beam and the longitudinal steel bars at the bottom of the beam, and the two ends of the longitudinal constructional steel bars are in a hook shape and are in lap joint binding with the longitudinal steel bars of the beam.
Preferably, the fiber reinforced composite (FRP) material of the PVC-FRP pipe is CFRP, AFRP, GFRP, BFRP or two of the materials.
A manufacturing method of a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by a core steel pipe comprises the following steps:
s1: cutting a PVC pipe with a certain length according to a building design, polishing two ends to be smooth, winding FRP strips soaked with epoxy resin on the PVC pipe at a certain interval, and continuously tensioning the FRP strips during winding to ensure the integrity of the PVC pipe and the PVC pipe, wherein the length of the PVC pipe, the width of the FRP strips, the winding interval and the winding layer number are determined according to the calculation of the bearing capacity of column members, after the epoxy resin is hardened, the PVC-FRP pipe is formed, the PVC-FRP pipe is disconnected in a node area, and the distance between the disconnected position and the surface of the node concrete is 5-10mm;
s2: placing a column reinforcement cage in a PVC-FRP pipe for fixing, supporting a node area and a reinforced concrete double-beam template, enabling double-beam longitudinal ribs close to the outer wall of a steel pipe to penetrate through the node area and to be bound and fixed with column longitudinal ribs and node area stirrups, then placing a core steel pipe which is welded with an annular steel plate and a shearing ring rib in advance in the node area, and fixing the core steel pipe in the node area through welding the shearing ring rib and the longitudinal ribs; then mutually overlapping and binding double beam longitudinal bars, column longitudinal bars and node zone stirrups of other through nodes, and binding and fixing the bent node zone transverse and longitudinal constructional bars and beam longitudinal bars;
s3: binding double-beam stirrups according to design requirements, connecting the double-beam longitudinal stirrups through web stirrups of the connecting beam every 500-1000mm after manufacturing the longitudinal reinforcement cage, placing the prefabricated metal damping device at the web position, and simultaneously tightening the double-beam longitudinal stirrups by the web stirrups of the connecting beam to ensure the joint stress performance and the lateral rigidity resistance of the double beams;
s4: when concrete is poured, the lower concrete column is poured firstly, after the concrete is vibrated compactly, concrete in the node area and reinforced concrete double-beam concrete are poured simultaneously, and concrete at the web plate of the connecting beam and the double-beam concrete are poured simultaneously, so that the integrity of the concrete is ensured; and finally pouring upper column concrete, curing until hardening, and forming a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by the core steel pipes.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the PVC-FRP pipe concrete column is adopted, when the concrete is pressed and expanded, the FRP strip with excellent tensile property is pulled in a circumferential direction, so that the core concrete of the column can be effectively restrained, and the bearing capacity of the concrete column is improved; and the PVC pipe has stable chemical property, can obviously improve the durability of the column, can serve as a column template, omits the procedures of formwork supporting and formwork removing, is convenient to construct, and has lower cost compared with the traditional template.
(2) In order to compensate the loss of the bearing capacity and rigidity of the node caused by the disconnection of the PVC-FRP pipe concrete column in the node area, the method for internally arranging the core steel pipe in the node area is adopted, the internally arranged core steel pipe can directly bear the axial force and the shearing force while providing the restraining force for the concrete in the node area, and compared with the common reinforced concrete node, the node bearing capacity of the core steel pipe is higher, and the anti-seismic performance and the energy consumption capacity of the node are obviously improved.
(3) In order to prevent the bonding damage of the outer wall of the core steel pipe and the concrete in the node area, the invention adopts a method of welding a plurality of layers of annular steel plates and shearing ring ribs on the outer wall of the core steel pipe, so that the bonding performance of the surface of the core steel pipe and the concrete in the node area can be improved, the force transmission performance of the node is effectively improved, and the shearing bearing capacity of the node is improved.
(4) In order to stagger the beam inner longitudinal ribs and the core steel pipes, the reinforced concrete double-beam joint form is adopted, so that the beam inner longitudinal ribs can penetrate through the joints, the beam end bending moment is effectively transmitted, the beam longitudinal ribs and the concrete are prevented from slipping, and the energy consumption capacity of the joints under the action of an earthquake is improved. In addition, the frame beam mainly bears the action of bending moment, the section height of the beam is the most important influence factor for improving the bearing capacity of the beam, and the reinforced concrete double-beam form is adopted, so that the bending resistance bearing capacity of the beam can be still ensured while the concrete consumption is greatly reduced, the dead weight of the structure is reduced, and the cost is reduced.
(5) In order to ensure the cooperative working performance of the reinforced concrete double beams, the invention adopts the structure that the web plates of the connecting beams are arranged between the reinforced concrete double beams at intervals, and the metal damping devices are arranged in the web plates of the connecting beams, so that the double beams can bear bending moment and shearing force together, the side rigidity of the reinforced concrete double beams is improved, the stability out of plane of the reinforced concrete double beams is ensured, and most of energy can be dissipated through the metal damping devices in the earthquake.
(6) The node area has simple structure, only transverse and longitudinal constructional steel bars are arranged, and the integrity of the double beams is ensured; and because the core steel pipe can bear partial axial force and horizontal shearing force, compared with a common reinforced concrete node, the anti-seismic performance of the reinforced concrete node is improved without arranging excessive horizontal stirrups and constructional steel bars, the longitudinal beam bars can penetrate through the node area, cumbersome anchoring measures of the longitudinal beam bars in the column are reduced, and the reinforced concrete node is simple and convenient to manufacture.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an elevation structure of an embodiment of a reinforced concrete double-beam node of a PVC-FRP pipe confined concrete filled steel tubular column of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a section B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 3;
FIG. 5 is a section view D-D of FIG. 3;
fig. 6 is a sectional view of E-E in fig. 3.
In the drawings, the list of components represented by the various numbers is as follows:
1-PVC-FRP pipe, 2-core steel pipe, 3-post indulges the muscle, 4-post stirrup, 5-double beam indulges muscle, 6-double beam stirrup, 7-even beam web structure stirrup, 8-shearing ring muscle, 9-concrete column, 10-node district stirrup, 11-even beam web, 12-double beam concrete, 13-node district transversely constructs the reinforcing bar, 14-node district vertically constructs the reinforcing bar.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node comprises a PVC-FRP pipe 1, a core steel pipe 2, an annular steel plate, a longitudinal connecting bolt, a shearing ring rib 8, a concrete column 9, a column longitudinal rib 3, a column hoop rib 4, a node area hoop rib 10, a reinforced concrete double-beam longitudinal rib 5, a double-beam hoop rib 6, double-beam concrete 12, a connecting beam web 11, a connecting beam web structural hoop rib 7, a connecting beam web metal damping device, a node area transverse structural steel bar 13 and a node area longitudinal structural steel bar 14.
The PVC-FRP pipe 1 is disconnected in the node area, the distance between the end part of the PVC-FRP pipe 1 and the node area is 5-10mm, the concrete column 9 and the column longitudinal ribs 3 penetrate through the whole node core area, the core steel pipe 2 is internally arranged in the concrete in the node area, when the core concrete in the core steel pipe 2 is subjected to expansion deformation, the core concrete can be in a three-dimensional stress state under the constraint action of the core steel pipe, and the strength of the core concrete is improved; the ratio of the outer diameter of the core steel pipe 2 to the diameter of the node core area is smaller than 0.5 so as to ensure the cooperative working performance of the concrete outside the core steel pipe and the concrete inside the core steel pipe; the two ends of the core steel pipe 2 extend into the upper column and the lower column by 100mm respectively, so that the bending bearing capacity of the column ends can be enhanced while the bearing capacity and the integrity of the nodes are improved.
The annular steel plates are welded on the periphery of the core steel pipe 2 in advance, are connected through longitudinal connecting bolts, and can transmit bending moment shear force transmitted by the beam to the core steel pipe through the annular steel plates after being integrally poured with concrete, so that the force transmission performance of the joint is ensured; the shearing ring rib 8 is welded on the outer wall of the core steel pipe 2 in advance, the shearing ring rib 8 adopts a thread reinforcing steel bar, and node shearing force is effectively transferred to the core steel pipe through the binding force between the shearing ring rib 8 and concrete, so that the binding condition of the node concrete and the surface of the core steel pipe can be effectively improved, and the earthquake resistance of the node is improved.
The reinforced concrete double beams have the same size, longitudinal constructional steel bars of the node area are respectively and integrally poured with the concrete of the node area, the intersection of longitudinal steel bars of the reinforced concrete double beams and the core steel pipe can be avoided by adopting a double beam mode, the longitudinal steel bars completely penetrate through the node area, the bonding performance of the reinforced steel bars of the node area and the concrete is improved, and the bearing capacity of the concrete of the node area is fully exerted; the double-beam longitudinal ribs 5 comprise one row or two rows up and down, and each row is provided with a plurality of double-beam longitudinal ribs 5 close to one side of the core steel pipe 2 are welded on the shearing ring ribs 8 on the periphery of the core steel pipe 2, so that the bending moment of the beam end can be effectively transmitted to the shearing ring ribs and the core steel pipe, and the functions of the shearing ring ribs and the core steel pipe are fully exerted.
Wherein, the web 11 of the connecting beam is required to be arranged every 500-1000mm, the thickness of the web is 80-120mm, and the structural stirrups 7 of the web of the connecting beam are at least arranged 2 times and are lapped and bound with the longitudinal steel bars of the double beams; the metal damping device is arranged in the web plate of the connecting beam and is composed of energy-dissipating steel plates made of multiple layers of mild steel, the yield point of the device is lower, the device has strong inelastic deformation capacity, the cooperative work capacity between the double beams can be increased in a normal use state, out-plane lateral stiffness of the reinforced concrete double beams is improved, and overall stability of the double beam nodes is effectively guaranteed. When an earthquake occurs, the metal damping device in the double-beam web plate can preferentially yield to generate larger elastoplastic deformation so as to achieve the effects of energy dissipation and shock absorption.
Wherein, the transverse constructional steel bars 13 of the node area are at least provided with 4 channels, 2 channels are respectively arranged at the longitudinal bars at the top of the beam and the longitudinal bars at the bottom of the beam, and the two ends of the transverse constructional steel bars are in a hook shape and are in lap joint binding with the longitudinal bars of the beam; the longitudinal constructional steel bars 14 of the node area are at least provided with 4 channels, the longitudinal steel bars at the top of the beam and the longitudinal steel bars at the bottom of the beam are respectively provided with 2 channels, and the two ends of the longitudinal constructional steel bars are in a hook shape and are in lap joint binding with the longitudinal steel bars of the beam.
Wherein the fiber reinforced composite (FRP) material of the PVC-FRP pipe 1 is CFRP, AFRP, GFRP, BFRP or two of the materials.
A manufacturing method of a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by a core steel pipe comprises the following steps:
s1: cutting a PVC pipe with a certain length according to a building design, polishing two ends to be smooth, winding FRP strips soaked with epoxy resin on the PVC pipe at a certain interval, and continuously tensioning the FRP strips during winding to ensure the integrity of the PVC pipe and the PVC pipe, wherein the length of the PVC pipe, the width of the FRP strips, the winding interval and the winding layer number are determined according to the calculation of the bearing capacity of column members, after the epoxy resin is hardened, the PVC-FRP pipe 1 is formed, the PVC-FRP pipe 1 is disconnected in a node area, and the distance between the disconnected position and the surface of the node concrete is 5-10mm;
s2: placing a column reinforcement cage in a PVC-FRP pipe 1 for fixing, supporting a node area and a reinforced concrete double-beam template, enabling a reinforced concrete double-beam longitudinal rib 5 close to the outer wall of a steel pipe to penetrate through the node area and be bound and fixed with a column longitudinal rib 3 and a node area stirrup 10, then placing a core steel pipe 2 welded with an annular steel plate and a shearing resistant ring rib in advance in the node area, and fixing the core steel pipe 2 in the node area through welding the shearing resistant ring rib and the longitudinal rib; then the reinforced concrete double-beam longitudinal bars 5 of other through nodes are mutually lapped and bound with the column longitudinal bars 3 and the stirrups of the node areas, and then the transverse and longitudinal constructional bars of the bent node areas are bound and fixed with the beam longitudinal bars;
s3: binding double-beam stirrups 6 according to design requirements, connecting the double-beam longitudinal stirrups through stirrups of a web plate 11 of the connecting beam every 500-1000mm after manufacturing the longitudinal reinforcement cage, placing a prefabricated metal damping device at the web plate position, and simultaneously tightening the double-beam longitudinal stirrups for the stirrups 7 of the web plate of the connecting beam to ensure the joint stress performance and the lateral rigidity resistance of the double beams;
s4: when concrete is poured, a lower concrete column is poured firstly, after the concrete is vibrated compactly, concrete in a node area and reinforced concrete double-beam concrete are poured simultaneously, and concrete at the connecting beam web 11 is poured simultaneously with the double-beam concrete, so that the integrity of the concrete is ensured; and finally pouring upper column concrete, curing until hardening, and forming a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by the core steel pipes.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (3)
1. The utility model provides a PVC-FRP pipe constraint concrete column-reinforced concrete double beam link up node that core steel pipe connects which characterized in that: the steel pipe comprises a PVC-FRP pipe (1), a core steel pipe (2), an annular steel plate, a longitudinal connecting bolt, a shearing ring rib (8), a concrete column (9), a column longitudinal rib (3), a column stirrup (4), a node area stirrup (10), a reinforced concrete double-beam longitudinal rib (5), a double-beam stirrup (6), double-beam concrete (12), a connecting beam web (11), a connecting beam web structural stirrup (7), a connecting beam web metal damping device, a node area transverse structural steel bar (13) and a node area longitudinal structural steel bar (14);
the PVC-FRP pipe (1) is disconnected in a node area, the distance between the end part of the PVC-FRP pipe (1) and the node area is 5-10mm, the concrete column (9) and the column longitudinal ribs (3) penetrate through the whole node core area, the core steel pipe (2) is internally arranged in the concrete in the node area, the ratio of the outer diameter of the core steel pipe (2) to the diameter of the node core area is less than 0.5, and the two ends of the core steel pipe (2) extend into the upper column and the lower column respectively by 100 mm;
the annular steel plates are welded on the periphery of the core steel pipe (2) in advance, the annular steel plates are connected through longitudinal connecting bolts, the shearing-resistant annular ribs (8) are welded on the outer wall of the core steel pipe (2) in advance, and the shearing-resistant annular ribs (8) are threaded steel bars;
the reinforced concrete double-beam has the same size, and the double-beam longitudinal ribs (5) comprise an upper row and a lower row or two rows, wherein a plurality of double-beam longitudinal ribs (5) close to one side of the core steel pipe (2) are welded on the shearing ring rib (8) at the periphery of the core steel pipe (2);
the web plates (11) of the connecting beam are arranged every 500-1000mm, the thickness of the web plates is 80-120mm, and the structural stirrups (7) of the web plates of the connecting beam are at least 2, and are in lap joint and binding with longitudinal steel bars of the double beams; the inside of the connecting beam web plate (11) is provided with a metal damping device which is made of a plurality of layers of energy-consumption steel plates made of mild steel;
at least 4 transverse constructional steel bars (13) in the node area are arranged, 2 transverse constructional steel bars are respectively arranged at the longitudinal bars at the top of the beam and the longitudinal bars at the bottom of the beam, and two ends of the transverse constructional steel bars are in a hook shape and are in lap joint binding with the longitudinal bars of the beam; the longitudinal constructional steel bars (14) of the node area are at least provided with 4 channels, the longitudinal steel bars at the top of the beam and the longitudinal steel bars at the bottom of the beam are respectively provided with 2 channels, and the two ends of the longitudinal constructional steel bars are in the shape of hooks and are in lap joint binding with the longitudinal steel bars of the beam.
2. A PVC-FRP pipe confined concrete column-reinforced concrete double beam through node with core steel pipe connection as in claim 1, wherein: the FRP material of the PVC-FRP pipe (1) is CFRP, AFRP, GFRP, BFRP or two of the materials.
3. The method for manufacturing the PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by the core steel pipe as claimed in claim 1, which is characterized by comprising the following steps:
s1: cutting a PVC pipe with a certain length according to a building design, polishing two ends to be smooth, winding FRP strips soaked with epoxy resin on the PVC pipe at a certain interval, and continuously tensioning the FRP strips during winding to ensure the integrity of the PVC pipe and the PVC pipe, wherein the length of the PVC pipe, the width of the FRP strips, the winding interval and the winding layer number are determined according to the calculation of the bearing capacity of column members, after the epoxy resin is hardened, the PVC-FRP pipe (1) is formed, the PVC-FRP pipe (1) is disconnected in a node area, and the distance between the disconnected position and the surface of node concrete is 5-10mm;
s2: placing a column reinforcement cage in a PVC-FRP pipe (1) for fixing, supporting a node area and a reinforced concrete double-beam template, enabling a reinforced concrete double-beam longitudinal rib (5) close to the outer wall of a steel pipe to penetrate through the node area and binding and fixing with a column longitudinal rib (3) and a node area stirrup (10), then placing a core steel pipe (2) which is welded with an annular steel plate and a shearing-resistant ring rib in advance in the node area, and fixing the core steel pipe (2) in the node area through welding the shearing-resistant ring rib and the double-beam longitudinal rib; then, the reinforced concrete double-beam longitudinal bars (5) of other through nodes are mutually lapped and bound with the column longitudinal bars (3) and the stirrups of the node areas, and then, the transverse and longitudinal constructional bars of the bent node areas are bound and fixed with the beam longitudinal bars;
s3: binding double-beam stirrups (6) according to design requirements, connecting the double-beam longitudinal stirrups through the stirrups of a connecting beam web (11) every 500-1000mm after the double-beam longitudinal reinforcement cage is manufactured, placing a prefabricated metal damping device at the web position, and simultaneously tightening the double-beam longitudinal stirrups by a connecting beam web structural stirrup (7) to ensure the common stress performance and the lateral rigidity resistance of the double beams;
s4: when concrete is poured, a lower concrete column is poured firstly, after the concrete is vibrated compactly, concrete in a node area and reinforced concrete double-beam concrete are poured simultaneously, and concrete at a connecting beam web (11) and the double-beam concrete are poured simultaneously, so that the integrity of the concrete is ensured; and finally pouring upper column concrete, curing until hardening, and forming a PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by the core steel pipes.
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| CN202210060376.6A CN114319580B (en) | 2022-01-19 | 2022-01-19 | PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by core steel pipes and manufacturing method |
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| CN202210060376.6A CN114319580B (en) | 2022-01-19 | 2022-01-19 | PVC-FRP pipe confined concrete column-reinforced concrete double-beam through node connected by core steel pipes and manufacturing method |
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| CN116556173A (en) * | 2023-04-08 | 2023-08-08 | 华中科技大学 | A prefabricated FRP-UHPC-steel hollow composite segmental beam and its construction method |
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