CN111236421A - Assembly type beam column reinforced straight-line-shaped node for avoiding reinforcing steel bars - Google Patents
Assembly type beam column reinforced straight-line-shaped node for avoiding reinforcing steel bars Download PDFInfo
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- CN111236421A CN111236421A CN202010224065.XA CN202010224065A CN111236421A CN 111236421 A CN111236421 A CN 111236421A CN 202010224065 A CN202010224065 A CN 202010224065A CN 111236421 A CN111236421 A CN 111236421A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
Abstract
The invention relates to a reinforcing steel bar avoiding fabricated beam-column reinforcing straight-line-shaped node, which belongs to a novel fabricated concrete beam-column node of a building structure and comprises a prefabricated concrete superposed beam and a prefabricated concrete column; when the number of the beam bottom longitudinal ribs is even, horizontally bending half of the beam bottom longitudinal ribs of the precast concrete composite beam twice; the other half of the beam bottom longitudinal ribs are not bent; when the number of the beam bottom longitudinal ribs is odd, the quantity difference between the beam bottom longitudinal ribs bent twice and the beam bottom longitudinal ribs not bent is 1; the corner straight steel bars of the precast concrete column are provided with 2 avoiding bent steel bars on the connecting lines of every two sides of each square. The invention can reasonably avoid a large amount of node steel bars in the construction process, and reasonably arranges the shear keys in all directions on the premise of ensuring the reasonable avoidance, so that the bearing capacity of the node is obviously improved, and particularly the shearing resistance of the node is obviously improved. The construction of the joint is convenient, the construction speed is fast, the economic effect is good, and the like, and the member is convenient to produce, and various reinforcing steel bars are avoided and the arrangement of the shear key does not influence the factory production.
Description
Technical Field
The invention belongs to a novel assembly type concrete beam column node of a building structure, and particularly relates to a reinforcing steel bar avoiding assembly type beam column reinforcing straight-line node.
Background
The fabricated concrete building is a concrete structure type house building which is designed and built in a field assembly mode by taking concrete prefabricated parts produced in a factory as main parts. The assembly method of the member generally comprises the steps of on-site post-pouring laminated concrete, steel bar anchoring post-pouring concrete connection and the like, and the steel bar connection can adopt the methods of sleeve grouting connection, welding, mechanical connection, reserved hole lap joint and the like. In the 80 s of the 20 th century, the prefabricated large-plate house popular in China has many hidden dangers and defects influencing the safety and normal use of the structure due to poor structural integrity, leakage, floor slab cracks and the like, and is gradually replaced by a cast-in-place concrete structure. However, with the application of the currently emerging prefabricated concrete structure, especially with the introduction of a plurality of foreign advanced technologies in recent years, a new technology for constructing a native prefabricated concrete structure is gradually formed.
The assembled reinforced concrete structure is one of the important directions for the development of building structures in China, is beneficial to the development of industrialization of buildings in China, improves the production efficiency, saves energy, develops green and environment-friendly buildings, and is beneficial to improving and ensuring the quality of building engineering. Compared with a cast-in-place construction method, the assembly type RC structure is beneficial to green construction, because the assembly type construction can better meet the requirements of land saving, energy saving, material saving, water saving, environmental protection and the like of the green construction, the negative effects on the environment are reduced, including noise reduction, dust prevention, environmental pollution reduction, clean transportation, field interference reduction, water, electricity, material and other resources and energy sources, and the principle of sustainable development is followed. Moreover, the assembly type structure can continuously finish a plurality of or all working procedures of the engineering in sequence, thereby reducing the types and the quantity of the engineering machinery entering the field, eliminating idle time of procedure connection, realizing the three-dimensional crossing operation, reducing constructors, improving the working efficiency, reducing the material consumption, reducing the environmental pollution and providing the guarantee for green construction. In addition, the fabricated structure reduces construction waste (about 30% -40% of the total amount of urban waste) to a great extent, such as waste steel bars, waste iron wires, waste bamboo and wood, waste concrete and the like.
The fabricated concrete building can be divided into a full assembly type and a partial assembly type according to the degree of assembly. The fully assembled building is generally limited to a multi-storey building with low requirements for seismic fortification or a low-rise building; the main components of the partially assembled concrete building are generally prefabricated components and are connected through cast-in-place concrete on site to form the building with an assembled integral structure.
The north american region is dominated by the united states and canada, and its fabricated concrete construction applications are very common because of the long-term study and popularization of the prefabricated construction by the precast/prestressed concrete association (PCI) and the perfection of the relevant standard specifications of the prefabricated concrete. The prefabricated building in North America mainly comprises two series of prefabricated building outer walls and structural prefabricated components, and the common characteristics of the prefabricated components are that the large-scale construction and the prestress are combined, so that the structural reinforcement and the connection structure can be optimized. The manufacturing and installation workload is reduced, the construction period of is shortened, and the characteristics of industrialization, standardization and technical economy are fully reflected. In the 20 th century, prefabricated buildings in north america were used primarily in low-rise, non-earthquake-resistant fortification areas. Due to the influence of earthquakes in the California region, engineering application technical research of earthquake-resistant and middle-high-rise prefabricated structures is very important in recent years. PCI has recently published a book of prefabricated concrete structure earthquake-resistant design, systematically analyzes earthquake-resistant design problems of prefabricated buildings from the theoretical and practical perspectives, summarizes latest scientific research achievements of a plurality of prefabricated structure earthquake-resistant designs, and has strong guiding significance for guiding prefabricated structure design and engineering application and popularization.
Europe is the origin of prefabricated buildings and has begun its way to industrialize buildings as early as the 17 th century. After the second world war, europe has further explored the exploration of building industrialization patterns due to shortage of labor resources. The design and construction mode of prefabricated concrete buildings is actively promoted in northern Europe, Western Europe and eastern Europe with underdeveloped economy. The design and construction experience of a plurality of prefabricated buildings is accumulated, various special prefabricated building systems and standardized universal prefabricated product series are formed, a series of prefabricated concrete engineering standards and application manuals are compiled, and the prefabricated concrete system plays a very important role in promoting the application of the prefabricated concrete in the whole world.
Japan and korea have used for our successful experience in research on standardized design construction of prefabricated buildings. Combining the requirements of the users. The method makes breakthrough progress in the aspects of integral seismic resistance and seismic isolation design of a prefabricated structural system. Representative achievement is two 58-layer tokyo towers constructed by prefabricated assembled frame knots in 2008 of japan. Meanwhile, the standard specifications of design, manufacture and construction of a Japanese precast concrete building system are also perfect, and the current precast specifications include precast concrete engineering (JASSl0) and concrete curtain wall (JASSl 4).
The design and construction technology of the fabricated concrete building is researched from the fifties and sixties of the 20 th century in China, a series of fabricated concrete building systems are formed, and typical building systems comprise a fabricated single-layer industrial factory building system, a fabricated multi-layer frame building system, a fabricated large-plate building system and the like. The application of the fabricated concrete building reaches the full prosperous period in the 80 th of the 20 th century, and a fabricated concrete industrialized building mode integrating design, manufacture, construction and installation is formed in many places in the country, the fabricated concrete building and the masonry building adopting the prefabricated hollow floor slab become two main building systems, and the application popularization rate reaches more than 70%. Because the function and physical performance of the fabricated building have many limitations and defects, the level of the design and the development of the construction technology of the fabricated concrete building in China cannot keep up with the change of social requirements and the development of the construction technology, and the fabricated concrete building is gradually replaced by a full cast-in-place concrete building system in the middle of the 90 s of the 20 th century, so that the fabricated concrete building is widely applied to the fabricated single-layer industrial factory building system at present. Other prefabricated building systems have very few engineering applications. The seismic integrity of the prefabricated structure and the specialized research of design, construction and management are not enough, so that the technical economy is poor. Is the root cause of the long-term stagnation of the prefabricated structure.
The connection node of the fabricated concrete requires higher strength and rigidity, and a large amount of steel bars need to be configured. However, unlike a cast-in-place concrete structure, the hoisting of large and heavy components and parts is difficult, so that the connection and avoidance of various reinforcing steel bars are very critical, otherwise, the field construction is difficult, the working hours are increased, and the construction quality is seriously affected. In addition, the shearing resistance of the connecting node is often seriously insufficient due to the integrity problem of new and old concrete. And because the existence of a large amount of reinforcing bars, it is difficult to set up reasonable shear force key, some not only seriously influence production, and the effect is also unsatisfactory.
Disclosure of Invention
The invention aims to provide a reinforcing steel bar avoiding fabricated beam column reinforced straight-line-shaped node, and a connection node of fabricated concrete requires higher strength and rigidity and needs to be configured with a large amount of reinforcing steel bars. However, unlike a cast-in-place concrete structure, the hoisting of large and heavy components and parts is difficult, so that the connection and avoidance of various reinforcing steel bars are very critical, otherwise, the field construction is difficult, the working hours are increased, and the construction quality is seriously affected. The avoidance problem of a large amount of steel bars of the node is mainly solved.
In addition, the shearing resistance of the connecting node is often seriously insufficient due to the integrity problem of new and old concrete. And because the existence of a large amount of reinforcing bars, it is difficult to set up reasonable shear force key, some not only seriously influence production, and the effect is also unsatisfactory. This application is mainly solved under the prerequisite of considering that the reinforcing bar is reasonable to dodge, will guarantee the sufficient ability of shearing of node again, and this kind of improvement can not bring the production problem.
The invention adopts the following technical scheme:
the steel bar avoidance assembly type beam column reinforced straight-line-shaped node is mainly formed by a whole device which mainly comprises a precast concrete superposed beam and a precast concrete column;
on the top end of the vertical precast concrete column, two precast concrete superposed beams are linearly opposite, the two precast concrete superposed beams are both vertical to the corresponding surface of the precast concrete column, and the end parts of the precast concrete superposed beams are both contacted with the top surface of the precast concrete column;
the beam bottom longitudinal bars of the two precast concrete superposed beams are equal in number, uniform and corresponding to each other;
when the number of the beam bottom longitudinal ribs is even, horizontally bending half of the beam bottom longitudinal ribs of the precast concrete composite beam twice, wherein the beam bottom longitudinal ribs bent twice are parallel to the beam bottom longitudinal ribs before bending; the other half of the beam bottom longitudinal ribs are not bent; when the number of the beam bottom longitudinal ribs is odd, the number of the beam bottom longitudinal ribs bent twice is different from that of the beam bottom longitudinal ribs not bent by 1; the beam bottom longitudinal bars bent twice and the beam bottom longitudinal bars not bent are separated from each other, and the similar steel bars are adjacent; the beam bottom longitudinal ribs corresponding to the two sides one by one are beam bottom longitudinal ribs bent twice and beam bottom longitudinal ribs not bent;
the beam bottom longitudinal ribs corresponding to the two precast concrete superposed beams one by one correspond to beam bottom longitudinal ribs which are bent twice and beam bottom longitudinal ribs which are not bent; the unbent beam bottom longitudinal ribs and the unbent middle parts of the twice bent beam bottom longitudinal ribs are in straight lines; the parts of the extending reinforcing steel bars of the beam bottom longitudinal bar which is not bent and the beam bottom longitudinal bar which is bent twice are staggered and parallel to each other;
the beam bottom longitudinal ribs bent twice at the corner parts are bent inwards at one time, and the bending directions of the beam bottom longitudinal ribs bent twice at the same end of the beam are the same;
arranging bent longitudinal rib reinforcing ribs at the bent positions of the beam bottom longitudinal ribs bent twice at the corner parts to form straight lines with the corresponding beam bottom longitudinal ribs which are not bent;
the prefabricated concrete column is a square cross section concrete column, four corners of the prefabricated concrete column are respectively provided with corner straight steel bars, 2 avoiding and bending steel bars are arranged on the connecting line of every two square sides of the corner straight steel bars, the avoiding and bending steel bars are bent towards the nearest corner straight steel bar for the second time at the top and the bottom, and after the second bending, the steel bars are still parallel to the steel bars at the non-bending section;
corner straight steel bars and avoiding bent steel bars are uniformly distributed in the precast concrete column, and the parts extending out of the precast concrete column are uniformly distributed at four corners of the square cross section of the precast concrete column and are vertically distributed in an L shape; the distance between the avoiding bent reinforcing steel bars at the adjacent corners is 20-80 mm wider than the width of the precast concrete composite beam;
the bent longitudinal rib reinforcing ribs and the unbent beam bottom longitudinal ribs extend to the opposite sides and are bent upwards at the width of the precast concrete column extending into three-quarters to seven-eighths of the width; the corresponding steel bar interval is 20-40 mm.
Furthermore, the precast concrete composite beam mainly comprises a precast concrete beam, a beam bottom longitudinal rib, a beam stirrup, a longitudinal rib bending point reinforcing stirrup, a bending longitudinal rib reinforcing rib and a beam end cast-in-situ shearing and bending reinforcing opening;
3-6 beam bottom longitudinal ribs are embedded in the bottom layer of the concrete precast beam, and the beam bottom longitudinal ribs are uniformly distributed; two ends of the beam bottom longitudinal bar extend out of the end part of the concrete precast beam, wherein one end is not bent, the part which does not extend out of the other end is horizontally bent for the second time, and the bent part is still parallel to the unbent section after the second bending; when the number of the beam bottom longitudinal ribs is even, the number of the beam bottom longitudinal ribs extending out of the same end of the concrete precast beam for secondary bending is equal to that of the beam bottom longitudinal ribs which are not bent, and when the number of the beam bottom longitudinal ribs extending out of the same end of the concrete precast beam for secondary bending is odd, the number of the beam bottom longitudinal ribs extending out of the same end of the concrete precast beam for secondary bending is different from that of the beam bottom longitudinal ribs which are not bent by 1; respectively grouping and arranging the secondary bending and unbending beam bottom longitudinal bars in parallel; when the beam bottom longitudinal rib on the outermost side is the secondary bending beam bottom longitudinal rib, the beam bottom longitudinal rib is bent towards the inner side; the bending direction of other reinforcing steel bars at the same end is the same as that of the beam bottom longitudinal bar at the outermost side;
the secondary bent parts of the beam bottom longitudinal ribs are parallel to the non-bent parts, and the distance between the secondary bent parts and the non-bent parts is 40-100 mm; the second bending point is 200 to 400mm away from the end of the precast concrete beam, the first bending point is 300 to 600mm away from the second bending point,
when the beam bottom longitudinal ribs on the outermost side are bent for the second time, bending longitudinal rib reinforcing ribs are arranged at the first bending points, the bending longitudinal rib reinforcing ribs and the beam bottom longitudinal ribs at the sections which are not bent are in a straight line, one end of each bending longitudinal rib reinforcing rib extends to the end part of the concrete precast beam, the other end of each bending longitudinal rib extends towards the inside of the concrete precast beam, and the overlapping length of the overlapping sections of the beam bottom longitudinal ribs and the bending longitudinal rib reinforcing ribs is 800-1000 mm;
a beam stirrup is arranged at a first bending point of the beam bottom longitudinal rib on the outermost side, and the beam stirrup hoops all the beam bottom longitudinal ribs on the outermost side; the second bending point longitudinal rib bending point reinforcing stirrups of the beam bottom longitudinal ribs on the outermost sides hoop all the beam bottom longitudinal ribs on the outermost sides;
a beam end cast-in-situ shear bending reinforcing port is vertically and downwards arranged in the middle of the end parts of the two ends of the concrete precast beam, is positioned between the beam bottom longitudinal ribs on the outermost side, and has the depth of one third to one half of the height of the concrete precast beam; the length of extending into the interior of the concrete precast beam is 150-300 mm.
Furthermore, the precast concrete column mainly comprises a precast column, corner straight steel bars, avoidance bent steel bars, bent steel bar reinforced steel bars, a sleeve, straight steel bar bent steel bar reinforced stirrups, double bent steel bar reinforced stirrups and a column end cast-in-situ shearing bent reinforced opening;
the prefabricated concrete column is a concrete column with a square cross section, four square corners of the prefabricated concrete column are respectively provided with corner straight steel bars, the corner straight steel bars are provided with 2 avoiding and bending steel bars on the connection line of every two square sides, the avoiding and bending steel bars are bent towards the nearest corner straight steel bars at the top and the bottom for the second time, the middle part is provided with an unbent section steel bar, two ends are provided with secondary bending section steel bars, and after secondary bending, the steel bars are still parallel to the unbent section steel bars;
the top parts of the corner straight steel bars and the avoiding bent steel bars vertically extend out of the prefabricated column, the bottom parts of the corner straight steel bars and the avoiding bent steel bars are connected with the sleeves and extend to the bottom parts of the prefabricated column, and the parts of the top parts of the corner straight steel bars and the avoiding bent steel bars, which extend out of the prefabricated column, are vertically aligned with the corresponding sleeves at the bottom parts of the corner straight steel;
corner straight reinforcing steel bars and non-bent section reinforcing steel bars of the avoiding bent reinforcing steel bars are uniformly distributed in the prefabricated column, the parts extending out of the prefabricated column are uniformly distributed at four corners of the square cross section of the prefabricated concrete column, and the corner straight reinforcing steel bars and the avoiding bent reinforcing steel bars are vertically distributed in an L shape;
two adjacent avoidance bent steel bars on each side of the upper part and the lower part are provided with a double-bent-bar reinforcing stirrup at a first bending point, and the double-bent-bar reinforcing stirrup hoops the two adjacent avoidance bent steel bars and the two opposite adjacent avoidance bent steel bars;
two adjacent corner straight steel bars and avoidance bent steel bars on each edge of the upper part and the lower part are provided with straight-rib bent-rib reinforcing stirrups at second bending points, and the straight-rib bent-rib reinforcing stirrups hoop the two adjacent corner straight steel bars and avoidance bent steel bars as well as corner straight steel bars and avoidance bent steel bars corresponding to opposite sides;
bending rib reinforcing steel bars are arranged at the first bending point on the avoidance bending steel bars 2-3 on each edge of the upper portion and the lower portion, one ends of the bending rib reinforcing steel bars respectively extend to the top and the bottom of the prefabricated column towards the upper portion and the lower portion, the other ends of the bending rib reinforcing steel bars extend towards the interior of the prefabricated column, and the overlapping length of the overlapping sections of the avoidance bending steel bars and the bending rib reinforcing steel bars is 800-1000 mm;
column end cast-in-situ shear bending reinforcing openings are respectively formed in the middle of the periphery of the top of the prefabricated column, are positioned between two nearest bending avoiding reinforcing steel bars, and have the downward depth which is half to one time of the distance from a second bending point to the top of the prefabricated column; the length of extending into the center of the prefabricated column is 50-100 mm.
Other non-illustrated rebar arrangements and related configurations meet the relevant national code standards.
The invention has the following advantages and beneficial effects:
the invention has the effects and advantages that a large number of node steel bars can be reasonably avoided in the construction process, and on the premise of ensuring reasonable avoidance, the shear keys in all directions are reasonably arranged, so that the bearing capacity of the node is obviously improved, and particularly the shearing resistance of the node is obviously improved. The construction of the joint is convenient, the construction speed is fast, the economic effect is good, and the like, and the member is convenient to produce, and various reinforcing steel bars are avoided and the arrangement of the shear key does not influence the factory production.
Drawings
FIG. 1 is a schematic plane view of a reinforcing steel bar avoiding fabricated beam-column reinforced straight-line-shaped node;
FIG. 2 is a schematic view of a vertical plane of a reinforcing steel bar avoiding fabricated beam-column reinforced straight-line-shaped node;
in the figure, 1 is a precast concrete composite beam; 2 is a precast concrete column;
1-1 is a concrete precast beam; 1-2 are beam bottom longitudinal ribs; 1-3 are beam stirrups; 1-4 are longitudinal bar bending point reinforced stirrups; 1-5 are bending longitudinal bar reinforcing ribs; 1-6 is a beam end cast-in-situ shearing and bending reinforcing port;
2-1 is a prefabricated column; 2-2 is a corner straight steel bar; 2-3 is an avoiding bending steel bar; 2-4 are bending reinforcement bars; 2-5 is a sleeve; 2-6 are straight rib and bent rib reinforced stirrups; 2-7 are double bent reinforcement stirrups; 2-8 is a column end cast-in-situ shearing and bending reinforcing port.
Detailed Description
In order to further illustrate the present invention, the following detailed description of the present invention is given with reference to the accompanying drawings and examples, which should not be construed as limiting the scope of the present invention.
Example 1:
as shown in fig. 1-2, a steel bar avoiding fabricated beam-column reinforcing straight-line-shaped node is composed of a precast concrete superposed beam 1 and a precast concrete column 2;
the precast concrete superposed beam 1 mainly comprises a precast concrete beam 1-1, a beam bottom longitudinal bar 1-2, a beam stirrup 1-3, a longitudinal bar bending point reinforcing stirrup 1-4, a bending longitudinal bar reinforcing rib 1-5 and a beam end cast-in-situ shearing and bending reinforcing opening 1-6;
the precast concrete column 2 mainly comprises a precast column 2-1, corner straight steel bars 2-2, avoidance bent steel bars 2-3, bent steel bar reinforcing steel bars 2-4, sleeves 2-5, straight steel bar bent steel bar reinforcing stirrups 2-6, double bent steel bar reinforcing stirrups 2-7 and column end cast-in-situ shearing bent reinforcing openings 2-8.
The steel bar avoidance assembly type beam column reinforcing linear node is mainly composed of a whole device, a prefabricated concrete composite beam 1 and a prefabricated concrete column 2;
on the top end of a vertical precast concrete column 2, two precast concrete superposed beams 1 are linearly opposite, the two precast concrete superposed beams 1 are both vertical to the corresponding surface of the precast concrete column 2, and the end parts of the precast concrete superposed beams 1 are both contacted with the top surface of the precast concrete column 2;
the beam bottom longitudinal bars 1-2 of the two precast concrete superposed beams 1 are equal in quantity, uniform and corresponding to each other;
when the number of the beam bottom longitudinal ribs 1-2 is even, horizontally bending half of the beam bottom longitudinal ribs 1-2 of the precast concrete composite beam 1 twice, wherein the beam bottom longitudinal ribs 1-2 bent twice are parallel to the beam bottom longitudinal ribs 1-2 before bending; the other half of the beam bottom longitudinal ribs 1-2 are not bent; when the number of the beam bottom longitudinal ribs 1-2 is odd, the number of the beam bottom longitudinal ribs 1-2 bent twice is different from that of the beam bottom longitudinal ribs 1-2 not bent by 1; the beam bottom longitudinal bars 1-2 bent twice and the beam bottom longitudinal bars 1-2 not bent are separated respectively, and the similar steel bars are adjacent; the beam bottom longitudinal ribs 1-2 corresponding to the two sides one by one are beam bottom longitudinal ribs 1-2 bent twice and beam bottom longitudinal ribs 1-2 not bent;
the beam bottom longitudinal ribs 1-2 of the two precast concrete superposed beams 1 correspond to one another, and the beam bottom longitudinal ribs 1-2 which are bent twice correspond to the beam bottom longitudinal ribs 1-2 which are not bent; the unbent beam bottom longitudinal bar 1-2 and the unbent middle part of the twice bent beam bottom longitudinal bar 1-2 are in a straight line; the parts of the unbent beam bottom longitudinal bar 1-2 and the overhanging steel bars of the beam bottom longitudinal bar 1-2 bent twice are staggered and parallel to each other;
the beam bottom longitudinal ribs 1-2 bent twice at the corner parts are bent inwards once, and the bending directions of the beam bottom longitudinal ribs 1-2 bent twice at the same end of the beam are the same;
arranging bent longitudinal rib reinforcing ribs 1-5 at the bent positions of the beam bottom longitudinal ribs 1-2 bent twice at the corner parts to form straight lines with the corresponding beam bottom longitudinal ribs 1-2 which are not bent;
the prefabricated concrete column 2 is a concrete column with a square cross section, four corners of the prefabricated concrete column 2 are respectively provided with corner straight steel bars 2-2, the corner straight steel bars 2-2 are provided with 2 avoiding bent steel bars 2-3 on the connection line of every two square sides, the avoiding bent steel bars 2-3 are bent for the second time towards the nearest corner straight steel bar 2-2 at the top and the bottom, and after the second bending, the steel bars are still parallel to the steel bars at the non-bent sections;
the corner straight steel bars 2-2 and the avoidance bent steel bars 2-3 are uniformly distributed in the precast concrete column 2, and the parts extending out of the precast concrete column 2 are uniformly distributed at four corners of the square cross section of the precast concrete column 2 and are vertically distributed in an L shape; the distance between the avoiding bent reinforcing steel bars 2-3 at the adjacent corners is 20-80 mm wider than the width of the precast concrete composite beam 1;
the bent longitudinal rib reinforcing ribs 1-5 and the unbent beam bottom longitudinal ribs 1-2 extend to opposite sides and are bent upwards at the width of the precast concrete column 2 extending into three-quarters to seven-eighths; the corresponding steel bar interval is 20-40 mm.
3-6 beam bottom longitudinal bars 1-2 are pre-embedded at the bottom layer of the concrete precast beam 1-1, and the beam bottom longitudinal bars 1-2 are uniformly distributed; two ends of the beam bottom longitudinal bar 1-2 extend out of the end part of the concrete precast beam 1-1, wherein one end is not bent, the other end is bent for the second time horizontally, and the bent second time is still parallel to the unbent section; when the number of the beam bottom longitudinal ribs 1-2 is even, the number of the beam bottom longitudinal ribs 1-2 extending out of the same end of the concrete precast beam 1-1 for secondary bending is equal to the number of the beam bottom longitudinal ribs 1-2 which are not bent, and when the number of the beam bottom longitudinal ribs 1-2 extending out of the same end of the concrete precast beam 1-1 for secondary bending is odd, the number of the beam bottom longitudinal ribs 1-2 extending out of the same end of the concrete precast beam 1-1 for secondary bending is different by 1; respectively grouping and arranging the secondary bending and unbent beam bottom longitudinal bars 1-2 in parallel; when the beam bottom longitudinal rib 1-2 at the outermost side is the secondary bending beam bottom longitudinal rib 1-2, the beam bottom longitudinal rib 1-2 is bent towards the inner side; the bending direction of other reinforcing steel bars at the same end is the same as the bending direction of the beam bottom longitudinal bar 1-2 at the outermost side;
the parts of the beam bottom longitudinal ribs after 1-2 secondary bending are parallel to the parts which are not bent, and the distance between the parts is 40-100 mm; the second bending point is 200 to 400mm away from the end of the precast concrete beam 1-1, the first bending point is 300 to 600mm away from the second bending point,
when the beam bottom longitudinal ribs 1-2 on the outermost side are bent for the second time, the bent longitudinal rib reinforcing ribs 1-5 are arranged at the first bending point, the bent longitudinal rib reinforcing ribs 1-5 and the beam bottom longitudinal ribs 1-2 of the non-bending section are in a straight line, one end of each bent longitudinal rib reinforcing rib extends to the end part of the concrete precast beam 1-1, the other end of each bent longitudinal rib reinforcing rib extends towards the inside of the concrete precast beam 1-1, and the overlapping length of the overlapping sections of the beam bottom longitudinal ribs 1-2 and the bent longitudinal rib reinforcing ribs 1-5 is 800-1000 mm;
a beam stirrup 1-3 is arranged at a first bending point of the beam bottom longitudinal rib 1-2 at the outermost side, and the beam stirrup 1-3 hoops all the beam bottom longitudinal ribs 1-2 at the outermost side; the second bending point longitudinal rib bending point reinforcing stirrups 1-4 of the beam bottom longitudinal ribs 1-2 on the outermost sides, and the longitudinal rib bending point reinforcing stirrups 1-4 hoop all the beam bottom longitudinal ribs 1-2 on the outermost sides;
a beam end cast-in-place shear bending reinforcing opening 1-6 is vertically and downwards arranged in the middle of the end part of each of two ends of the concrete precast beam 1-1, the beam end cast-in-place shear bending reinforcing opening 1-6 is positioned between the beam bottom longitudinal ribs 1-2 on the outermost side, and the depth is one third to one half of the height of the concrete precast beam 1-1; the length of extending into the concrete precast beam 1-1 is 150-300 mm.
The precast concrete column 2 mainly comprises a precast column 2-1, corner straight steel bars 2-2, avoidance bent steel bars 2-3, bent steel bar reinforcing steel bars 2-4, sleeves 2-5, straight steel bar bent steel bar reinforcing stirrups 2-6, double bent steel bar reinforcing stirrups 2-7 and column end cast-in-situ shearing bent reinforcing openings 2-8.
The prefabricated concrete column 2 is a concrete column with a square cross section, four square corners of the prefabricated concrete column 2 are respectively provided with corner straight steel bars 2-2, the corner straight steel bars 2-2 are arranged on the connection line of every two square sides, 2 avoiding bent steel bars 2-3 are arranged, the avoiding bent steel bars 2-3 are bent for the second time towards the nearest corner straight steel bar 2-2 at the top and the bottom, the middle part is a non-bent section steel bar, two ends are secondary bent section steel bars, and after secondary bending, the steel bars are still parallel to the non-bent section steel bars;
the top parts of the corner straight steel bars 2-2 and the top parts of the avoidance bent steel bars 2-3 vertically extend out of the prefabricated columns 2-1, the bottom parts of the corner straight steel bars 2-2 and the top parts of the avoidance bent steel bars 2-3 are connected with the sleeves 2-5 and extend to the bottom parts of the prefabricated columns 2-1, and the parts of the corner straight steel bars 2-2 and the top parts of the avoidance bent steel bars 2-3 extending out of the prefabricated columns 2-1 are vertically aligned with the corresponding sleeves 2;
the corner straight steel bars 2-2 and the unbent section steel bars of the avoiding bent steel bars 2-3 are uniformly distributed in the prefabricated column 2-1, the parts extending out of the prefabricated column 2-1 are uniformly distributed at four corners of the square cross section of the prefabricated concrete column 2, and the corner straight steel bars 2-2 and the avoiding bent steel bars 2-3 are vertically distributed in an L shape;
two adjacent avoidance bent steel bars 2-3 on each side of the upper part and the lower part are provided with a double-bent-bar reinforcement stirrup 2-7 at a first bending point, and the double-bent-bar reinforcement stirrup 2-7 hoops the two adjacent avoidance bent steel bars 2-3 and the two adjacent avoidance bent steel bars 2-3 on the opposite side;
two adjacent corner straight steel bars 2-2 and avoidance bent steel bars 2-3 on each side of the upper part and the lower part are provided with straight bent steel bar reinforcement stirrups 2-6 at second bending points, and the straight bent steel bar reinforcement stirrups 2-6 hoop the two adjacent corner straight steel bars 2-2 and avoidance bent steel bars 2-3 and the corner straight steel bars 2-2 and avoidance bent steel bars 2-3 corresponding to opposite sides;
bending rib reinforcing steel bars 2-4 are arranged at a first bending point of the avoidance bending steel bars 2-3 on each edge of the upper portion and the lower portion, one end of each bending rib reinforcing steel bar 2-4 extends to the top and the bottom of the prefabricated column 2-1 towards the upper portion and the lower portion respectively, the other end extends towards the inside of the prefabricated column 2-1, and the overlapping length of the overlapping section of the avoidance bending steel bar 2-3 and the overlapping section of the bending rib reinforcing steel bar 2-4 is 800-1000 mm;
column end cast-in-situ shear bending reinforcing openings 2-8 are respectively formed in the middle of the periphery of the top of the prefabricated column 2-1, the column end cast-in-situ shear bending reinforcing openings 2-8 are located between two nearest avoidance bending reinforcing steel bars 2-3, and the downward depth is half to one time of the distance from a second bending point to the top surface of the prefabricated column 2-1; the length of extending into the center of the prefabricated column 2-1 is 50-100 mm.
Other non-illustrated rebar arrangements and related configurations meet the relevant national code standards.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides an assembled beam column is dodged to reinforcing bar and is strengthened a font node, comprises precast concrete superposed beam (1), precast concrete post (2), its characterized in that:
on the top end of the vertical precast concrete column (2), two precast concrete superposed beams (1) are linearly opposite, the two precast concrete superposed beams (1) are perpendicular to the corresponding surface of the precast concrete column (2), and the end parts of the precast concrete superposed beams (1) are in contact with the top surface of the precast concrete column (2);
the beam bottom longitudinal bars (1-2) of the two precast concrete superposed beams (1) are equal in number, and are uniform and correspond to each other;
when the number of the beam bottom longitudinal ribs (1-2) is even, horizontally bending half of the beam bottom longitudinal ribs (1-2) of the precast concrete composite beam (1) twice, wherein the beam bottom longitudinal ribs (1-2) bent twice are parallel to the beam bottom longitudinal ribs (1-2) before bending; the other half of the beam bottom longitudinal ribs (1-2) are not bent; when the number of the beam bottom longitudinal ribs (1-2) is odd, the number of the beam bottom longitudinal ribs (1-2) bent twice is 1 different from that of the beam bottom longitudinal ribs (1-2) which are not bent; the beam bottom longitudinal bars (1-2) bent twice and the beam bottom longitudinal bars (1-2) not bent are separated from each other, and the similar steel bars are adjacent; the beam bottom longitudinal ribs (1-2) which are in one-to-one correspondence with the two sides are the beam bottom longitudinal ribs (1-2) which are bent twice and the beam bottom longitudinal ribs (1-2) which are not bent;
the beam bottom longitudinal ribs (1-2) of the two precast concrete superposed beams (1) correspond to one another, and the beam bottom longitudinal ribs (1-2) which are bent twice correspond to the beam bottom longitudinal ribs (1-2) which are not bent; the unbent beam bottom longitudinal bar (1-2) and the unbent middle part of the twice bent beam bottom longitudinal bar (1-2) are in a straight line; the parts of the unbent beam bottom longitudinal bar (1-2) and the overhanging steel bars of the beam bottom longitudinal bar (1-2) bent twice are staggered and parallel to each other;
the beam bottom longitudinal ribs (1-2) bent twice at the corner parts are bent inwards once, and the bending directions of the beam bottom longitudinal ribs (1-2) bent twice at the same end of the beam are the same;
bending longitudinal rib reinforcing ribs (1-5) are arranged at the bending positions of the beam bottom longitudinal ribs (1-2) bent twice at the corner parts and are in straight lines with the corresponding beam bottom longitudinal ribs (1-2) which are not bent;
the prefabricated concrete column (2) is a concrete column with a square cross section, four corners of the prefabricated concrete column (2) are respectively provided with corner straight steel bars (2-2), the corner straight steel bars (2-2) are provided with 2 avoiding and bending steel bars (2-3) on the connection line of every two corner straight steel bars on each square side, the avoiding and bending steel bars (2-3) are bent for the second time towards the nearest corner straight steel bars (2-2) at the top and the bottom, and after the secondary bending, the steel bars are still parallel to the steel bars at the non-bent sections;
corner straight steel bars (2-2) and avoidance bent steel bars (2-3) are uniformly distributed in the precast concrete column (2), and parts extending out of the precast concrete column (2) are uniformly distributed at four corners of the square cross section of the precast concrete column (2) and are vertically distributed in an L shape; the distance between the avoiding bent reinforcing steel bars (2-3) at the adjacent corners is 20-80 mm wider than the width of the precast concrete composite beam (1);
the bent longitudinal rib reinforcing ribs (1-5) and the unbent beam bottom longitudinal ribs (1-2) extend to the opposite sides, and are bent upwards in the width of the precast concrete column (2) extending three-quarters to seven-eighths; the corresponding steel bar interval is 20-40 mm.
2. The steel bar avoiding fabricated beam-column reinforcing straight-line-shaped node as claimed in claim 1, wherein: the precast concrete superposed beam (1) comprises a precast concrete beam (1-1), a beam bottom longitudinal rib (1-2), a beam stirrup (1-3), a longitudinal rib bending point reinforcing stirrup (1-4), a bending longitudinal rib reinforcing rib (1-5) and a beam end cast-in-situ shearing and bending reinforcing opening (1-6);
3-6 beam bottom longitudinal bars (1-2) are embedded in the bottom layer of the concrete precast beam (1-1), and the beam bottom longitudinal bars (1-2) are uniformly distributed; both ends of the beam bottom longitudinal bar (1-2) extend out of the end part of the concrete precast beam (1-1), wherein one end is not bent, the other end of the beam bottom longitudinal bar is not horizontally bent for the second time, and the beam bottom longitudinal bar is still parallel to the unbent section after being bent for the second time; when the number of the beam bottom longitudinal ribs (1-2) is even, the number of the beam bottom longitudinal ribs (1-2) extending out of the same end of the concrete precast beam (1-1) for secondary bending is equal to the number of the beam bottom longitudinal ribs (1-2) which are not bent, and when the number of the beam bottom longitudinal ribs (1-2) extending out of the same end of the concrete precast beam (1-1) for secondary bending is odd, the number of the beam bottom longitudinal ribs (1-2) extending out of the same end of the concrete precast beam (1-1) for secondary bending is different from the number of; respectively grouping and arranging the secondary bending and unbent beam bottom longitudinal bars (1-2) in parallel; when the beam bottom longitudinal rib (1-2) on the outermost side is the secondary bending beam bottom longitudinal rib (1-2), the beam bottom longitudinal rib (1-2) is bent towards the inner side; the bending direction of other reinforcing steel bars at the same end is the same as that of the beam bottom longitudinal bar (1-2) at the outermost side;
the part of the beam bottom longitudinal bar (1-2) after secondary bending is parallel to the part which is not bent, and the distance is 40-100 mm; the second bending point is 200 to 400mm away from the end of the precast concrete beam (1-1), the first bending point is 300 to 600mm away from the second bending point,
when the beam bottom longitudinal rib (1-2) on the outermost side is bent for the second time, a bent longitudinal rib reinforcing rib (1-5) is arranged at a first bending point, the bent longitudinal rib reinforcing rib (1-5) and the beam bottom longitudinal rib (1-2) on the non-bending section are in a straight line, one end of the bent longitudinal rib reinforcing rib (1-5) extends to the end part of the concrete precast beam (1-1), the other end of the bent longitudinal rib reinforcing rib (1-5) extends towards the inside of the concrete precast beam (1-1), and the overlapping length of the overlapping section of the beam bottom longitudinal rib (1-2) and the bent longitudinal rib reinforcing rib (1-5) is 800-1000 mm;
a beam stirrup (1-3) is arranged at a first bending point of the beam bottom longitudinal rib (1-2) at the outermost side, and the beam stirrup (1-3) hoops all the beam bottom longitudinal ribs (1-2) at the outermost side; the second bending point longitudinal rib bending point reinforcing stirrups (1-4) of the beam bottom longitudinal ribs (1-2) on the outermost sides, and the longitudinal rib bending point reinforcing stirrups (1-4) hoop all the beam bottom longitudinal ribs (1-2) on the outermost sides;
beam end cast-in-situ shear-bending reinforcing openings (1-6) are vertically and downwards formed in the middle positions of the end parts of the two ends of the concrete precast beam (1-1), the beam end cast-in-situ shear-bending reinforcing openings (1-6) are positioned between the beam bottom longitudinal ribs (1-2) on the outermost side, and the depth is one third to one half of the height of the concrete precast beam (1-1); the length of extending into the interior of the concrete precast beam (1-1) is 150-300 mm.
3. The steel bar avoiding fabricated beam-column reinforcing straight-line-shaped node as claimed in claim 1, wherein: the precast concrete column (2) comprises a precast column (2-1), corner straight steel bars (2-2), avoidance bent steel bars (2-3), bent steel bar reinforced steel bars (2-4), sleeves (2-5), straight steel bar bent steel bar reinforced stirrups (2-6), double bent steel bar reinforced stirrups (2-7) and a column end cast-in-situ shearing bent reinforced opening (2-8),
the prefabricated concrete column (2) is a concrete column with a square cross section, four square corners of the prefabricated concrete column (2) are respectively provided with corner straight steel bars (2-2), the corner straight steel bars (2-2) are arranged on the connection line of every two of the sides of each square, 2 avoiding bending steel bars (2-3) are arranged, the avoiding bending steel bars (2-3) are bent for the second time towards the nearest corner straight steel bars (2-2) at the top and the bottom, the middle part is a non-bending section steel bar, the two ends are secondary bending section steel bars, and after secondary bending, the steel bars are still parallel to the non-bending section steel bars;
the top parts of the corner straight steel bars (2-2) and the avoiding bent steel bars (2-3) vertically extend out of the prefabricated column (2-1), the bottom parts of the corner straight steel bars and the avoiding bent steel bars are connected with the sleeves (2-5) and extend to the bottom parts of the prefabricated column (2-1), and the parts of the top parts of the corner straight steel bars (2-2) and the avoiding bent steel bars (2-3) extending out of the prefabricated column (2-1) are vertically aligned with the corresponding sleeves (2-5) at the bottom parts;
corner straight steel bars (2-2) and non-bent section steel bars of the avoidance bent steel bars (2-3) are uniformly distributed in the prefabricated column (2-1), parts extending out of the prefabricated column (2-1) are uniformly distributed at four corners of the square cross section of the prefabricated concrete column (2), and the corner straight steel bars (2-2) and the avoidance bent steel bars (2-3) are vertically distributed in an L shape;
two adjacent avoidance bent reinforcing steel bars (2-3) on each edge of the upper part and the lower part are provided with double bent reinforcing stirrups (2-7) at a first bending point, and the double bent reinforcing stirrups (2-7) hoop the two adjacent avoidance bent reinforcing steel bars (2-3) and the two adjacent avoidance bent reinforcing steel bars (2-3) on the opposite side;
two adjacent corner straight steel bars (2-2) and avoidance bent steel bars (2-3) on each edge of the upper part and the lower part are provided with straight-bar bent-bar reinforced stirrups (2-6) at second bending points, and the straight-bar bent-bar reinforced stirrups (2-6) hoop the two adjacent corner straight steel bars (2-2) and avoidance bent steel bars (2-3) as well as the corner straight steel bars (2-2) and avoidance bent steel bars (2-3) corresponding to opposite sides;
bending rib reinforcing steel bars (2-4) are arranged at first bending points of the avoidance bending steel bars (2-3) on each edge of the upper portion and the lower portion, one ends of the bending rib reinforcing steel bars (2-4) extend to the top and the bottom of the prefabricated column (2-1) towards the upper portion and the lower portion respectively, the other ends of the bending rib reinforcing steel bars extend towards the inside of the prefabricated column (2-1), and the overlapping length of overlapping sections of the avoidance bending steel bars (2-3) and the bending rib reinforcing steel bars (2-4) is 800-1000 mm;
column end cast-in-situ shear bending reinforcing openings (2-8) are respectively formed in the middle of the periphery of the top of the prefabricated column (2-1), the column end cast-in-situ shear bending reinforcing openings (2-8) are positioned between two nearest avoidance bending reinforcing steel bars (2-3), and the downward depth is half to one time of the distance from a second bending point to the top surface of the prefabricated column (2-1); the length of extending into the center of the prefabricated column (2-1) is 50-100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010224065.XA CN111236421A (en) | 2020-03-26 | 2020-03-26 | Assembly type beam column reinforced straight-line-shaped node for avoiding reinforcing steel bars |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010224065.XA CN111236421A (en) | 2020-03-26 | 2020-03-26 | Assembly type beam column reinforced straight-line-shaped node for avoiding reinforcing steel bars |
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| CN111236421A true CN111236421A (en) | 2020-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227604A (en) * | 2020-09-11 | 2021-01-15 | 广州工程总承包集团有限公司 | Beam column node bent rib arrangement structure and construction method thereof |
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2020
- 2020-03-26 CN CN202010224065.XA patent/CN111236421A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227604A (en) * | 2020-09-11 | 2021-01-15 | 广州工程总承包集团有限公司 | Beam column node bent rib arrangement structure and construction method thereof |
| CN112227604B (en) * | 2020-09-11 | 2022-03-22 | 广州工程总承包集团有限公司 | Beam column node bent rib arrangement structure and construction method thereof |
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