CN111962953A - Steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and manufacturing method - Google Patents
Steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and manufacturing method Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 379
- 239000010959 steel Substances 0.000 title claims abstract description 379
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000013461 design Methods 0.000 claims abstract description 21
- 210000001364 upper extremity Anatomy 0.000 claims description 60
- 210000003141 lower extremity Anatomy 0.000 claims description 35
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- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 19
- 238000010276 construction Methods 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 14
- 238000010008 shearing Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 9
- 230000007123 defense Effects 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 15
- 230000009471 action Effects 0.000 description 7
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- 238000005260 corrosion Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
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- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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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
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/023—Separate connecting devices for prefabricated floor-slabs
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Abstract
The invention discloses a steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and a manufacturing method thereof. Compared with the prior art, the beam-column-support connecting node has the advantages of simple structure, high assembly rate and clear force transmission path. The anti-seismic connecting plate has two anti-seismic defense lines, and the web connecting plate still has certain bearing capacity after the pi-shaped connecting piece fails. The pi-shaped connecting piece is an important connecting structure of the steel support and the beam column node, and not only is the assembly connection of the steel support and the node realized, but also the strength and the stability of the connecting part are enhanced through pouring grouting materials. The node beam-column-support-floor slab is firm in connection, strong in integrity and excellent in anti-seismic performance, and provides key technical support for the engineering design of the assembled green light steel combined structure.
Description
Technical Field
The invention relates to a steel pipe concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and a manufacturing method, and belongs to the technical field of structural engineering.
Background
In recent years, the assembled building technology in China is rapidly developed. The fabricated building has the advantages of high construction efficiency, low construction cost, green cycle sustainability and the like. Along with the deepening of the urbanization process, the proportion of the residential buildings in villages and small towns in the total amount of new buildings in China is greatly improved, and the residential buildings in villages and small towns dominate the new residential buildings. The application of vigorously pushing the fabricated building in the residential buildings in villages and small towns has important significance for the urbanization process and the industrialized development of buildings in China. With the advancement of the strategy of sustainable development, the environmental requirements of environmental protection, energy conservation and emission reduction while the assembly type building is popularized are also a necessary trend of the development of the building industry. Therefore, research and development of the assembled structure system suitable for the green houses in villages and towns are the problems to be urgently solved in the promotion of the assembled green buildings and the building industrialization in China.
The steel structure is an ideal structure system applied to the fabricated building due to the advantages of light weight, high strength, easy forming, cyclic utilization and the like. However, the traditional steel structure system is still problematic when applied to low-rise residential buildings in villages and small towns. (1) The structural columns in the traditional steel structure building are mostly H-shaped steel columns, and are particularly common in steel structure plants. If the steel column is applied to a building with the length-width ratio close to 1 in a village and small town house, the difference of the seismic performance of the two seismic main shaft directions of the structure is overlarge due to the weak shaft of the H-shaped steel column, and the seismic performance of the structure is seriously influenced due to the irregular rigidity distribution. Meanwhile, buckling instability easily occurs at the column bottom of the H-shaped steel column under the action of large axial force and bending moment, and the overall stability of the structure has risks. (2) The traditional steel structure beam column node form mostly adopts node forms such as outer ring plate, inner baffle and cast steel. Firstly, the node forms have large steel consumption, complex structure and high design difficulty. Meanwhile, welding operation is inevitably needed during field construction, so that the assembly efficiency is low, the method is not suitable for assembly type buildings, and the cost performance of the small-load building of village and town houses is low. Secondly, the node forms are mostly integral nodes, namely, the same node domain is usually connected with primary and secondary beams in multiple directions, so that if the node domain is damaged, the risk of collapse of all steel beams connected on the node is caused. And the structure arrangement is not flexible, so that the residential house type arrangement is single. (3) Due to the small load scale of the village residential building and the small section size of the structural column, the structural column alone serving as a lateral force resisting member can reduce the lateral force resisting rigidity of the structure, so that steel supports need to be arranged among the columns to enhance the overall lateral force resisting level of the structure. And the traditional steel structure node can not realize the assembly of steel support. (4) The traditional steel structure node is relatively complex in structure. Most node forms have reinforcing structures such as oblique stiffening ribs in a node area, and the special-shaped structures increase the difficulty of application of standardized assembled wallboards and assembled floor slabs in steel structures.
Based on the above, the research and development of a novel assembly type steel structure node which is reliable in anti-seismic performance, high in assembly degree and suitable for village and town houses is a problem to be solved urgently at present. The invention provides a middle node of a steel pipe concrete column, an H-shaped steel beam, a steel support and a pi-shaped connecting piece combined side column and a manufacturing method thereof. The vertical bearing member of the node adopts a combined structural member of a steel tube concrete column, the vertical bearing capacity is stronger, and the anti-seismic performance of the two main shaft directions is the same. And the mechanical property of the steel column in a complex stress state is obviously superior to that of an H-shaped steel column in a traditional steel structure. The frame structure composed of the light steel pipe concrete columns and the H-shaped steel beams is called a light steel frame combined frame connection structure. Meanwhile, the beam, the column, the steel support and the fabricated floor are integrally designed by the node structure, and the integral assembly of the member connected with the node is completely realized.
Disclosure of Invention
The invention aims to provide a steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and a manufacturing method thereof, and aims to overcome the defects of low assembly efficiency, unreasonable stress, poor earthquake resistance and the like of a beam column node in the middle of a light steel frame house. Meanwhile, the beam, the column, the floor and the steel support at the joint of the side column in the middle of the frame achieve an integrated assembly effect.
In order to achieve the purpose, the invention adopts the following technical scheme: a steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node comprises a light square steel tube recycled concrete column (1), an H-shaped steel beam (2), a pi-shaped connecting piece (3), a web connecting plate (4), a 30mm long high-strength bolt (5), a floor slab shear-resistant stud (6), an outer side corner welding seam (10), an inner side corner welding seam (11), an upper layer steel support (12), a lower layer steel support (13), a 70mm through high-strength bolt (14), a stool steel bar (15), a grouting material supporting plate (16), a prefabricated recycled concrete floor slab (17) and a floor slab steel bar (18).
The pi-shaped connecting piece (3) is formed by welding a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8) on a rectangular bottom plate (9) with a hole in the center through a right-angle fillet weld, the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are symmetrical up and down, and the side parts of the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are connected through the rectangular bottom plate (9); the pi-shaped connecting piece (3) is connected with the side surface of the light square steel tube recycled concrete column (1) in a sticking welding way through an outer side fillet weld (10) of the rectangular bottom plate (9) and an inner side fillet weld (11) at a middle opening; the H-shaped steel beam (2) is connected with the pi-shaped connecting piece (3) through a 30mm long high-strength bolt (5): the upper flange of the H-shaped steel beam (2) is connected with the upper limb (7) of the pi-shaped connecting piece, and the lower flange of the H-shaped steel beam (2) is connected with the lower limb (8) of the pi-shaped connecting piece; the floor shear-resistant studs (6) are uniformly welded on the top surface of the upper flange of the H-shaped steel beam (2) at equal intervals. One end of a web plate connecting plate (4) penetrates through a rectangular hole in the center of a rectangular bottom plate (9) to be welded with the light square steel tube recycled concrete column (1) through right-angle fillet welds on two sides, and the other end of the web plate connecting plate is connected with an H-shaped steel beam (2) through a 30mm long high-strength bolt (5). The upper layer steel support (12) is connected with the pi-shaped connecting piece upper limb (7) through a connecting plate with a bolt hole at the lower part through a 30mm long high-strength bolt (5) and a 70mm through high-strength bolt (14). The lower layer steel support (13) is connected with the lower limb (8) of the Pi-shaped connecting piece through a connecting plate with a bolt hole at the lower part through a 30mm long high-strength bolt (5); one end of the bench steel bar (15) is fixed at the web position of the upper limb (7) of the pi-shaped connecting piece through a 70mm through high-strength bolt (14), and the other end of the bench steel bar extends into the prefabricated and regenerated concrete floor (17) and is bound with the floor steel bar (18). The prefabricated recycled concrete floor slab (17) is assembled with the H-shaped steel beam (2) through the shear bolt preformed hole on the prefabricated recycled concrete floor slab and the preformed hole at the grouting material supporting plate (16), and the grouting material supporting plate (16) is pre-embedded in the prefabricated recycled concrete floor slab (17) in advance.
The square steel tube in the light square steel tube recycled concrete column (1) is a seamless steel tube formed by one-time hot rolling, and the section of the square steel tube is square. The outer diameter of the steel pipe is 100 mm-150 mm, the wall thickness is 4 mm-8 mm, the recycled concrete is filled in the steel pipe, and the grain size of the recycled coarse aggregate is 5 mm-20 mm. The light square steel tube recycled concrete column (1) has the following advantages: the square steel tube has a restraint effect on the filling of the recycled concrete, so that the bearing capacity of the recycled concrete is improved, and the ductility of the concrete is enhanced; the buckling of the steel pipe is limited by filling the recycled concrete in the steel pipe, and the instability and damage of the steel pipe can be effectively avoided. In practical engineering, the steel tube concrete column has the advantages of high rigidity, high bearing capacity, good fire resistance and corrosion resistance and the like.
The H-shaped steel beam (2) is a main bearing component in a light steel frame structure, bears the load of a wall body and a floor slab and transmits the load to the column. The light steel frame is made of hot-rolled H-shaped steel beams. In order to avoid local buckling of the end part of the H-shaped steel beam (2) due to local stress concentration, stiffening ribs with the thickness not less than the thickness of a web plate of the H-shaped steel beam (2) are arranged on the outer sides of an upper limb (7) and a lower limb (8) of a pi-shaped connecting piece of the pi-shaped connecting piece (3) to improve local rigidity. As the upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces need to be welded with the rectangular bottom plate (9), the positions of welding seams are raised, 5mm triangular notches need to be ground at the end parts of the upper flange and the lower flange of the H-shaped steel beam (2) before assembly, and accurate alignment of bolt holes is guaranteed. The top surface of the H-shaped steel beam (2) is uniformly provided with shear-resistant studs to prepare for the installation of the fabricated floor slab.
The pi-shaped connecting piece (3) is a key part of a light steel frame and a light steel truss beam column node and consists of a pi-shaped connecting piece upper limb (7), a pi-shaped connecting piece lower limb (8) and a rectangular bottom plate (9) with a central hole.
The web connecting plate (4) is a rectangular steel plate, the length of the rectangular steel plate is the same as that of the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting piece, the width of the rectangular steel plate is 0.8 times of the height of a rectangular hole of the rectangular bottom plate (9) with the hole formed in the center, and the thickness of the rectangular steel plate is 1.0-1.2 times of the thickness of the web of the H-shaped steel beam (2). One side of the web plate connecting plate (4) is vertically welded on the wall of the light square steel tube recycled concrete column (1) through the rectangular holes of the rectangular bottom plate (9) with the central hole through the vertical fillet welds at two sides. The web connecting plate (4) is connected with the web of the H-shaped steel beam (2) through the high-strength bolt to form a joint anti-seismic second defense line. Tests prove that the web connecting plate (4) can still provide reliable bending resistance and shearing resistance bearing capacity for the node after the Pi-shaped connecting piece (3) fails under the action of an earthquake, so that the light steel frame can be effectively prevented from continuously collapsing due to failure of the beam-column node. The width of the web connecting plate (4) is smaller than the height of the rectangular hole of the rectangular bottom plate (9), so that the inner fillet weld (11) is avoided being welded on the wall of the light square steel tube recycled concrete column (1). The axial line of the web connecting plate (4) deviates from the axial line of the weak axis of the H-shaped steel beam (2) by 0.5 time of the sum of the thickness of the web connecting plate (4) and the thickness of the web of the H-shaped steel beam (2). The axis can coincide with the light square steel tube recycled concrete column (1) when the H-shaped steel beam (2) is installed. The weld quality control grade should be one grade or two grade.
The 30mm long high-strength bolt (5) is an important component for connecting beam-column joints, the material of the bolt is high-strength alloy steel or other high-quality steel, and two strength grades of 8.8 and 10.9 are adopted in the assembled light steel house. The length of the nut is generally 10-20 mm of the nut. In order to facilitate the installation of the high-strength bolt at the node, the nut can be welded at the bolt hole of the upper limb (7) and the lower limb (8) of the pi-shaped connecting piece, a torque wrench is used for assembling the bolt between the upper flange and the lower flange of the H-shaped steel beam (2), and the same torque is set for each bolt.
The floor shear-resistant stud (6) is an important component for reinforcing the H-shaped steel beam (2) and the prefabricated recycled concrete floor (17) and can be used as a floor shear key. The length of the prefabricated floor slab is about 40mm, the diameter of the prefabricated floor slab is 8-10 mm, one or two sides are arranged along the top surface of the upper flange of the beam, the horizontal distance is 80-150 mm, and the prefabricated floor slab can be integrally cast with a concrete floor slab during floor slab construction or placed at a post-cast strip of the prefabricated floor slab for casting.
The upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are short I-shaped steel beams which are made of two materials and have the same size, the external elongation is 1.0-1.5 times of the height of the H-shaped steel beam (2), the height of the beams is 0.5-1.0 times of the height of the H-shaped steel beam (2), the thicknesses of the upper flange, the lower flange and the web are 0.8-1.0 times of the thickness of the flange of the H-shaped steel beam (2), and the flange width is the same as that of the flange of the H-shaped steel beam (2). The upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are vertically welded on the rectangular bottom plate (9) with the central hole through fillet welds, the upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are symmetrically arranged about the centroid of the rectangular bottom plate (9) with the central hole, and the centroid distances from the bottom of the lower flange of the upper I-shaped steel cantilever short beam and the top of the upper flange of the lower I-shaped steel cantilever short beam to the rectangular bottom plate (9) with the central hole are respectively 0.55 times of the beam height length of the H-shaped steel beam (2). Therefore, a certain gap can be reserved between the upper limb (7) and the lower limb (8) of the pi-shaped connecting piece, and the H-shaped steel beam (2) can be smoothly assembled between the upper limb (7) and the lower limb (8) of the pi-shaped connecting piece. The Pi-shaped connecting piece (3) is connected with the side surface of the light square steel tube recycled concrete column (1) in a sticking welding mode through an outer side fillet weld (10) and an inner side fillet weld (11), and the quality control grade of the weld is one grade or two grades.
The rectangular bottom plate (9) is a rectangular steel plate with a hole in the center. The strength of the material is the same as that of steel used for the light square steel tube recycled concrete column (1), and Q345 steel can be adopted in light steel residential buildings. The height of the connector is 300mm, and the size requirements of the right-angle fillet weld of the connector and the Pi-shaped connector upper limb (7) and the Pi-shaped connector lower limb (8) are met. The width of the connecting piece is 100mm, namely the connecting piece is as wide as the upper limbs (7) of the pi-shaped connecting piece and the lower limbs (8) of the pi-shaped connecting piece, and the size requirement of the outer side angle welding seam (10) is met. The width of a rectangular hole in the middle of the rectangular bottom plate (9) is 60mm, the height of the rectangular hole is 140mm, and the size requirement of the inside fillet weld (11) is met. The rectangular bottom plate (9) mainly plays a role in connection transition of the light square steel tube recycled concrete column (1) and the Pi-shaped connecting piece (3), locally strengthens the thickness of the steel tube wall of the light square steel tube recycled concrete column (1), and protects the steel tube column wall of the part from being corroded.
And the outer side fillet weld (10) and the inner side fillet weld (11) are both right-angle fillet welds between the rectangular bottom plate (9) and the light square steel tube recycled concrete column (1). The height of the welding leg is 8mm, and a first-level and a second-level welding line are adopted. The two welding seams transmit the bending moment, the axial force and the shearing force transmitted by the Pi-shaped connecting piece (3) to the light square steel tube recycled concrete column (1) through the rectangular bottom plate (9), and the effect of transmitting load is mainly achieved.
The upper layer steel support (12) and the lower layer steel support (13) are hot-rolled H-shaped steel and are arranged between two adjacent light square steel tube recycled concrete columns (1) at an angle of 60-45 degrees. The flange width of the upper layer steel support (12) is equal to that of the upper limbs (7) of the pi-shaped connecting piece, the flange width of the lower layer steel support (13) is equal to that of the lower limbs (8) of the pi-shaped connecting piece, and the height of the web plate is 60-100 mm generally. Q345 steel is used. The lower end of the connecting rod is connected with the upper flange of the pi-shaped connecting piece upper limb (7) through a high-strength bolt through a steel plate with a bolt hole. The steel support is welded with the steel plate at the lower end of the steel support. The upper layer steel support (12) and the lower layer steel support (13) mainly play roles in improving the lateral stiffness and the bearing capacity of the frame and improving the energy consumption capacity of the frame in the earthquake process.
The 70mm through high-strength bolt (14) is an S8.8S or S10.3 grade high-strength bolt. The upper end of the upper end is positioned on the upper surface of the gusset plate at the bottom of the upper layer steel support (12), and the lower end is positioned on the lower surface of the upper flange of the H-shaped steel beam (2). The 70mm through high-strength bolt (14) is connected with a bottom gusset plate of the upper steel support (12), a pi-shaped connecting piece upper limb (7) and an upper flange of the H-shaped steel beam (2). The three parts are connected into a whole, and one side of the bench steel bar (15) is clamped at the position of the web plate of the pi-shaped connecting piece upper limb (7), so that the function of connecting the bench steel bar (15) and the pi-shaped connecting piece (3) is achieved.
The bench steel bar (15) is a prefabricated steel bar and is a key of node-floor integrated design. The steel bar anchor is composed of two arched steel bars with anchor ends on two sides and a middle transverse connecting steel bar, wherein the arched steel bars on the two sides are 80mm long, and the right-angle anchor ends are 30mm long. The length of the two middle transverse connecting steel bars is 70mm, and the distance between the two middle transverse connecting steel bars is 60 mm. The two ends of the steel bar are fixed with the arched steel bar in a spot welding or binding mode to form a prefabricated three-dimensional steel bar mesh. The bench reinforcing steel bars (15) are composed of HRB335 phi 8 reinforcing steel bars, extend into the preformed holes of the prefabricated recycled concrete floor slab (17) and are bound with the exposed floor reinforcing steel bars (18), the other ends of the bench reinforcing steel bars are fixed at the positions of webs of the upper limbs (7) of the pi-shaped connecting piece through high-strength bolts (14) of 70mm, and two bench reinforcing steel bars (15) are symmetrically arranged on two sides of the webs of the upper limbs (7) of the pi-shaped connecting piece. The design of the steel bar net is a 'stool' shape, which is beneficial to anchoring between the steel bar net and the floor slab steel bar (18) and the grouting material, and the anchoring end faces downwards, so that the steel bar net can be heightened to be positioned at the same height with the floor slab steel bar (18) for binding.
The grouting material layer board (16) is trilateral welded steel sheet with embedded anchor reinforcing steel bar hooks, the thickness of the steel sheet is 3mm, the size length of the rectangular steel sheet is 120mm, and the width of the rectangular steel sheet is 110 mm. Slightly larger than a grouting hole which is reserved on the prefabricated recycled concrete floor (17) and has the length of 100mm and the width of 100 mm. The grouting material supporting plate (16) is embedded into the lower portion of the reserved hole before the prefabricated recycled concrete floor slab (17) is formed, and the upper surface of the steel plate is flush with the lower surface of the floor slab and the upper surface of the lower flange of the pi-shaped connecting piece upper limb (7). The outer edge of the steel plate is matched with the edge of the lower flange of the upper limb (7) of the Pi-shaped connecting piece, so that the bottom of the poured grouting material can be prevented from leaking.
The prefabricated recycled concrete floor (17) is a steel concrete floor prefabricated in a factory, the thickness of the prefabricated recycled concrete floor is 80-100 mm, the height of the prefabricated recycled concrete floor is generally equal to that of the upper limb (7) of the pi-shaped connecting piece, recycled concrete is adopted as concrete, and the strength of the concrete is C40. According to design requirements, single-layer or double-layer reinforcing meshes are internally provided, HRB 335-grade phi 8 reinforcing steel bars are generally adopted, and the spacing between the reinforcing steel bars is 100 mm. The prefabricated floor slab is characterized in that the upper surface of the floor slab with the reserved holes for the pi-shaped connecting piece upper limbs (7) at the joints is flush with the surface of the upper flange of the pi-shaped connecting piece upper limbs (7). Grouting holes 100mm long and 100mm wide are reserved on two sides of a web plate of an upper limb (7) of the pi-shaped connecting piece, and high-strength grouting material is poured after bench steel bars (15) are placed in the grouting holes, so that the grouting material is filled in the reserved holes and two sides of the web plate of the upper limb (7) of the pi-shaped connecting piece, and the purpose of joint work of a floor slab and an assembly type node is achieved.
The floor slab reinforcing steel bars (18) are distributed reinforcing steel bars configured in the prefabricated recycled concrete floor slab (17), and the distributed reinforcing steel bars exposed out of the reserved holes play a role in being connected with the bench reinforcing steel bars (15).
The invention relates to a steel pipe concrete column-H-shaped steel beam-steel support-Pi-shaped connecting piece combined side column middle node and a manufacturing method thereof, wherein the manufacturing method comprises the following steps:
the first step is as follows: the method comprises the steps of prefabricating a light square steel tube recycled concrete column (1) in a factory, selecting a square steel tube and a steel plate with corresponding sizes, cutting, polishing and perforating, pouring recycled concrete in the factory, and finishing the manufacture of the light square steel tube recycled concrete column (1) through maintenance. As shown in fig. 5.
The second step is that: machining a pi-shaped connecting piece (3) and a web connecting plate (4) in a factory workshop, selecting a finished hot-rolled I-shaped steel beam with a corresponding size, cutting, polishing, punching and the like to manufacture a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8), cutting and punching hot-rolled steel plates with corresponding thicknesses, and manufacturing a rectangular bottom plate (9) with a central hole. And welding the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces with the rectangular bottom plate (9) to manufacture the pi-shaped connecting pieces (3). And selecting steel plates with corresponding sizes and strengths to cut and open holes to manufacture the web connecting plate (4). As shown in fig. 6.
The third step: and welding the phi-shaped connecting piece (3) and the web connecting plate (4) to the corresponding position of the light square steel tube recycled concrete column (1) in a factory workshop. Firstly, welding a pi-shaped connecting piece (3) to a light square steel tube recycled concrete column (1), and paying attention to the fact that the pi-shaped connecting piece (3) is connected with the side face of the light square steel tube recycled concrete column (1) in a sticking welding mode through an outer side fillet weld (10) and an inner side fillet weld (11), so that the length of the weld is fully guaranteed by the fact that the pi-shaped connecting piece (3) is connected with the square steel tube column through two circles of rectangular full-weld fillet welds, and the shearing-resistant bearing capacity and the bending-resistant bearing capacity of the weld at a node are fully met. And then the web connecting plate (4) is welded to the square steel pipe column through a central hole of the rectangular bottom plate (9). And welding nuts to bolt hole positions of the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces to be ready for installing bolts. As shown in fig. 7.
The fourth step: and a stiffening rib is welded at the web plate position of the end part of the H-shaped steel beam (2), and the thickness of the stiffening rib is not less than that of the web plate of the H-shaped steel beam (2). And processing the upper and lower flanges and the web bolt holes of the H-shaped steel beam (2) according to the designed position. Finally, the top surface of the H-shaped steel beam (2) is welded with the stud. As shown in fig. 8.
The fifth step: and (3) processing an upper steel support (12) and a lower steel support (13) in a factory, selecting hot-rolled H-shaped steel meeting the section size requirement, and grinding and cutting the hot-rolled H-shaped steel into corresponding sizes. And selecting a steel plate, and processing and manufacturing the steel support bottom gusset plate through the procedures of cutting, polishing, perforating and the like. The formed steel support is welded to the bottom gusset plate. And finishing the processing of the prefabricated steel support. As shown in fig. 9.
And a sixth step: manufacturing a grouting material supporting plate (16) and a prefabricated recycled concrete floor slab (17), selecting a finished steel plate to be cut into corresponding sizes in a factory, processing reinforcing steel bar hooks for anchoring on the grouting material supporting plate (16) through procedures of cutting, bending and the like, and spot-welding the reinforcing steel bar hooks on the steel plate to complete the grouting material supporting plate. And manufacturing and binding floor slab reinforcing steel bars, supporting a floor slab template, placing a grouting material supporting plate at the opening, pouring floor slab recycled concrete, and maintaining and forming. As shown in fig. 10.
The seventh step: a light square steel tube recycled concrete column (1) with a Pi-shaped connecting piece (3) and a web connecting plate (4) is installed on a construction site. And (3) cutting a triangular notch with the length of about 5mm up and down at the end part of the H-shaped steel beam (2), sliding the H-shaped steel beam (2) between the pi-shaped connecting pieces (3) of the square steel pipe columns on the two sides, aligning bolt holes on the pi-shaped connecting pieces (3) and the web plate connecting plate (4) with bolt holes of the H-shaped steel beam (2), and screwing and fixing the H-shaped steel beam (2) by using high-strength bolts. As shown in fig. 11.
Eighth step: and mounting the prefabricated upper steel support (12) on the corresponding position of the upper limb (7) of the pi-shaped connecting piece through a high-strength bolt. And (3) mounting the prefabricated lower steel support (13) on the corresponding position of the lower limb (8) of the pi-shaped connecting piece through a high-strength bolt. As shown in fig. 12.
The ninth step: and installing the prefabricated recycled concrete floor slab to a corresponding position. As shown in fig. 13.
The tenth step: and placing the bench steel bars (15) at corresponding positions of webs of the upper limbs (7) of the pi-shaped connecting piece, and screwing up 70mm through high-strength bolts (14) to fix the bench steel bars (15) at the webs of the upper limbs (7) of the pi-shaped connecting piece. And ties the bench rebars (15) to the floor rebars (18). As shown in fig. 14.
The eleventh step: and (3) pouring high-strength grouting material at the positions of the floor shear-resistant studs (6), the pi-shaped connecting piece upper limbs (7), the bench reinforcements (15), the grouting material supporting plate (16) and the like, and performing subsequent construction after maintenance is completed. As shown in fig. 15.
Compared with the prior art, the invention relates to a combined side column middle node of a steel pipe concrete column, an H-shaped steel beam, a steel support and a pi-shaped connecting piece and a manufacturing method thereof, and the combined side column middle node has the following advantages:
1. the invention creatively adopts the structure of the Pi-shaped connecting piece (3) to carry out the assembly and connection between the beams and the columns: the height of the beam column node area is increased by the pi-shaped connecting piece (3), and the shearing resistance and bearing capacity of the node are improved. Meanwhile, the rectangular bottom plate (8) with the central hole is welded on the light square steel tube recycled concrete column (1) in an attaching mode, so that steel materials on the column wall of the node cannot be directly exposed in the air, and the corrosion resistance of the node is improved. The whole node has strong bending and shearing bearing capacity.
2. The invention creatively assembles the joint connecting structure and the steel supporting structure: the upper flange of the upper limb (7) of the Pi-shaped connecting piece in the Pi-shaped connecting piece (3) is provided with a bolt hole which is connected with a bottom connecting plate of the upper layer steel support (12) by a bolt. The steel support can be assembled in the frame assembling stage through the structural form, and the support can be installed without additionally arranging other parts in the later stage. The construction steps are greatly simplified, the cost is saved, and the construction efficiency is improved.
3. The invention creatively carries out integrated design on the assembled floor slab through the connection part of the bench steel bars and the joints: the prefabricated recycled concrete floor slab (17) is provided with a hole at the connecting part of the prefabricated recycled concrete floor slab and the pi-shaped connecting piece upper limb (7), floor slab reinforcing steel bars (18) are exposed inside the prefabricated recycled concrete floor slab, and the floor slab reinforcing steel bars (18) are bound with the bench reinforcing steel bars (15). The bench steel bar (15) is fixed with the pi-shaped connecting piece upper limb (7) through a 70mm through high-strength bolt (14). And finally, pouring a rigid grouting material at the starting part to form the prefabricated floor slab-stool steel bar-pi-shaped connecting piece connecting structure. The structure ensures that the prefabricated floor slab is reliably connected with the node area, and the bending resistance, the compression resistance and the stability of the pi-shaped connecting piece are greatly enhanced after the steel pipe grouting material is poured into the pi-shaped connecting piece. The reliability of the connection structure of the steel support and the pi-shaped node is further ensured.
4. The node structure is simple in design, and the arrangement is flexible in an assembled light steel frame and light steel truss structure. No matter be outer annular plate formula or interior division board formula beam column node in the current node structure, all adopt integral design to side column, corner post and center pillar, not only consume a large amount of steel but also can cause the naked design problem of beam column node. The node structure only needs to be arranged on one side of a beam-column connection, and only needs to arrange the Pi-shaped connecting piece and the web connecting plate on one side with the beam, so that the flexibility of node arrangement is greatly improved, and the loss of steel and bolts is reduced. Meanwhile, the pi-shaped connecting piece is beneficial to construction and installation of the assembled wallboard and the floor slab. Although the rigidity and the seismic performance of the joint are improved by the joint with the triangular rib plate, the installation of the assembled wallboard and the floor slab at the joint of the triangular rib plate is complex, and the treatment such as local corner cutting of the wallboard and the floor slab is not avoided. The structural form of the designed Pi-shaped connecting piece is more regular, the heights of the I-shaped steel cantilever short beams are smaller than or close to the thickness of the floor slab, shear keys or tie bars can be arranged at webs of the I-shaped steel cantilever short beams and cast with the floor slab into a whole, and the I-shaped steel cantilever short beams can also be hidden in the heat insulation of an assembly wall body or an outer wall, so that the defects of exposed beams and exposed columns of an assembly steel structure house are better overcome.
5. The atress is clear and definite, possesses two antidetonation defence lines. The node connection structure related by the invention has simple and convenient design and high reliability. The H-shaped steel beam transmits the building load to the beam column node, the axial force, the shearing force and the bending moment of the H-shaped steel beam are transmitted to the Pi-shaped connecting piece and the web connecting plate through the bolts, and finally the acting force transmission between the H-shaped steel beam and the steel pipe column is realized through the welding seam of the rectangular bottom plate and the web connecting plate. Therefore, the joint design under different load effects can be completed by controlling the length of the welding seam and the thickness of the steel, and the design reliability is more definite. Under the action of earthquake reciprocating load, the Pi-shaped connecting piece is used as a first defense line to dissipate most of earthquake energy, the web connecting plate can still bear the actions of shearing force and bending moment after the Pi-shaped connecting piece fails, and the whole node can still continue to work. The method has positive significance for resisting continuous collapse and repairing after earthquake under the earthquake action of the assembled structure.
6. High assembling degree and high industrialization level. The square steel tube recycled concrete column, the Pi-shaped connecting piece, the web connecting plate, the H-shaped steel beam and the like can be prefabricated in engineering and assembled on a construction site. The engineering large-scale production has high precision, strict quality control and resource saving. The welding and wet operation workload of a construction site is reduced, standard parts with unified standards and different specifications can be produced for different beam-column sections for assembly, and the housing is beneficial to realizing housing industrialization.
7. Energy saving, environmental protection and convenient transportation. The prefabricated connecting piece related by the invention has less steel consumption, adopts environment-friendly and energy-saving materials such as recycled concrete and the like, and joint components mostly adopt hot-rolled section steel, so that the materials are easy to obtain and can basically realize no waste. The node construction method provided by the invention has the advantages that the procedures which are easy to cause noise pollution and light pollution are carried out in a factory, and the environment is protected while the construction quality is ensured.
Drawings
Fig. 1 is an exploded view of a node structure.
Fig. 2 is an overall top view of a node.
FIG. 3 is an overall isometric view of a node.
Fig. 4 is an overall bottom view of the node.
FIG. 5 step 1-manufacture of recycled concrete-filled tubular columns.
FIG. 6, step 2-fabrication of the Pi-shaped connector and web connection plate.
FIG. 7 step 3-welding of the pi connector.
FIG. 8, step 4-fabrication of I-beam bottom beam.
FIG. 9 step 5-making a steel support.
Fig. 10, step 6 — making a prefabricated recycled concrete floor.
Fig. 11 step 7-assembly of beam column.
FIG. 12 step 8-Assembly of the steel support.
Fig. 13 step 9-assembly of the floor slab.
FIG. 14 step 10-Straps fix bench rebar.
Fig. 15 step 11 — pour grout.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in fig. 3, the middle node of the steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connector combined side column comprises a light-weight square steel tube recycled concrete column (1), an H-shaped steel beam (2), a pi-shaped connector (3), a web connecting plate (4), a 30mm long high-strength bolt (5), a floor shear-resistant stud (6), a pi-shaped connector upper limb (7), a pi-shaped connector lower limb (8), a rectangular bottom plate (9), an outer side corner welding seam (10), an inner side corner welding seam (11), an upper layer steel support (12), a 70mm through high-strength bolt (14), a bench steel bar (15), a grouting material supporting plate (16), a prefabricated recycled concrete floor (17) and a floor steel bar (18).
The bearing capacity required by the square steel tube recycled concrete column can be calculated through concrete structure design specifications and steel tube concrete design specifications according to the building load, and the square steel tube recycled concrete column can be adjusted through adjusting the outer diameter and thickness of the steel tube, the strength of recycled concrete and the like.
And (3) designing main parameters such as flange and web thickness, beam height, overhanging length and the like of the upper and lower I-shaped steel overhanging short beams of the Pi-shaped connecting piece according to 'steel structure design specifications', and determining the length and thickness of the rectangular bottom plate, the size of a central opening and the like.
H-beams are the primary load bearing members in the structure. The length and the thickness of the web connecting plate need to be adjusted according to the combination of the axial force, the shearing force and the bending moment of the end of the H-shaped steel beam and the steel structure design standard, and the number of bolts needed by a node area, the length of a welding seam and the like are calculated.
And designing parameters such as the thickness of a floor slab, the strength of concrete, the diameter of distributed reinforcing steel bars, the distance between the distributed reinforcing steel bars and the like according to the floor load. And determining the position and the size of the reserved hole according to the size of the pi-shaped connecting piece and the arrangement of the shear bolts on the beam.
According to the relevant theory of structural seismic design, parameters such as the section size of the steel support, the arrangement angle and the like are determined. After the data are determined, the procedures of blanking, production, construction, assembly and the like can be carried out.
The node rigidity of the invention is improved due to the increase of the height of the Pi-shaped connecting piece to the node domain of the beam column. Thereby effectively controlling the deformation of the I-shaped section beam and avoiding the defects of overlarge beam deflection and overlarge vibration amplitude of the lower beam excited by external vibration load.
In the node, the floor and the pi-shaped connecting piece are effectively connected through structures such as bench reinforcing steel bars and high-strength bolts, and the pi-shaped connecting piece is strengthened after grouting materials are poured in the later period. The upper limb of the Pi-shaped connecting piece is simultaneously connected with the bottom beam and the steel support, the upper flange of the Pi-shaped connecting piece is subjected to local pressure and shearing force transmitted by the steel support, and the lower flange of the Pi-shaped connecting piece is subjected to axial force, bending moment and shearing force transmitted by the bottom beam and is in a complex stress state as a whole. After grouting materials are poured around the web plate, the local bearing performance and the shearing resistance bearing capacity of the web plate are greatly improved. Therefore, the bending rigidity of the node area is improved, and the shearing resistance and the bearing capacity are improved.
According to the provisions of the design specifications of the steel structure, the failure mode of the joint is designed as deformation failure of the beam end, the failure position of the steel beam is concentrated at the bolt hole of the beam flange under the action of an earthquake, and the section of the beam flange is subjected to the process from yielding to breaking, so that the process is slow, has obvious deformation and has ideal ductile failure characteristics.
The node is provided with pi-shaped connecting pieces in the main energy consumption area in the design, the flanges of the upper and lower I-shaped steel cantilever short beams of the pi-shaped connecting pieces deform under the action of reciprocating load so as to consume partial seismic energy, the web plates of the upper and lower I-shaped steel cantilever short beams play the role of stiffening ribs to form a tension-compression bar truss system connected with the beam ends, and partial seismic energy can be consumed while the deformation of the node is controlled.
According to structural earthquake design specifications, the frame structure conforms to the rule of 'strong column and weak beam' and needs to be provided with a plurality of earthquake-proof defense lines. The first anti-seismic defense line of the node is in Pi-shaped connection, and the web connecting plate is the second anti-seismic defense line. In the process that the first anti-seismic defense line and the second anti-seismic defense line fail in succession, the floor slabs in the node areas are mutually extruded, the crack between the beam end floor slab and the wall is widened and even completely cracked, the duration of the process is long, and people can be evacuated.
The steel pipe concrete column-H-shaped steel beam-steel support-Pi-shaped connecting piece combined side column middle node and the manufacturing method thereof have the advantages of firm connection, good integrity, convenient assembly and environmental protection, and are a novel node connection type suitable for assembling low and multiple light steel frames and light steel truss residential building system beam columns.
The foregoing is an exemplary embodiment of the present invention, and the practice of the present invention is not limited thereto.
Claims (10)
1. A steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula side column middle part node which characterized in that: the pi-shaped connecting piece (3) is formed by welding a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8) on a rectangular bottom plate (9) with a hole in the center through a right-angle fillet weld, the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are symmetrical up and down, and the side parts of the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are connected through the rectangular bottom plate (9); the pi-shaped connecting piece (3) is connected with the side surface of the light square steel tube recycled concrete column (1) in a sticking welding way through an outer side fillet weld (10) of the rectangular bottom plate (9) and an inner side fillet weld (11) at a middle opening; the H-shaped steel beam (2) is connected with the pi-shaped connecting piece (3) through a 30mm long high-strength bolt (5): the upper flange of the H-shaped steel beam (2) is connected with the upper limb (7) of the pi-shaped connecting piece, and the lower flange of the H-shaped steel beam (2) is connected with the lower limb (8) of the pi-shaped connecting piece; the floor shear-resistant studs (6) are uniformly welded on the top surface of the upper flange of the H-shaped steel beam (2) at equal intervals; one end of a web plate connecting plate (4) penetrates through a rectangular hole in the center of a rectangular bottom plate (9) to be welded with the light square steel tube recycled concrete column (1) through right-angle fillet welds on two sides, and the other end of the web plate connecting plate is connected with an H-shaped steel beam (2) through a 30mm long high-strength bolt (5); the upper layer steel support (12) is connected with the pi-shaped connecting piece upper limb (7) through a connecting plate with a bolt hole at the lower part through a 30mm long high-strength bolt (5) and a 70mm through high-strength bolt (14); the lower layer steel support (13) is connected with the lower limb (8) of the Pi-shaped connecting piece through a connecting plate with a bolt hole at the lower part through a 30mm long high-strength bolt (5); one end of the bench steel bar (15) is fixed at the web position of the upper limb (7) of the pi-shaped connecting piece through a 70mm through high-strength bolt (14), and the other end of the bench steel bar extends into the prefabricated recycled concrete floor slab (17) and is bound with the floor slab steel bar (18); the prefabricated recycled concrete floor slab (17) is assembled with the H-shaped steel beam (2) through the shear bolt preformed hole on the prefabricated recycled concrete floor slab and the preformed hole at the grouting material supporting plate (16), and the grouting material supporting plate (16) is pre-embedded in the prefabricated recycled concrete floor slab (17) in advance.
2. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: the square steel tube in the light square steel tube recycled concrete column (1) is a seamless steel tube formed by one-time hot rolling, and the section of the square steel tube is square.
3. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: and stiffening ribs with the thickness not less than that of the web plate of the H-shaped steel beam (2) are arranged on the outer sides of the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces (3).
4. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: the web connecting plate (4) is a rectangular steel plate, the length of the rectangular steel plate is the same as that of an upper limb (7) and a lower limb (8) of the pi-shaped connecting piece, the width of the rectangular steel plate is 0.8 times of the height of a rectangular hole of a rectangular bottom plate (9) with a hole at the center, and the thickness of the rectangular steel plate is 1.0-1.2 times of the thickness of a web of the H-shaped steel beam (2); one side of the web plate connecting plate (4) is vertically welded on the light square steel tube recycled concrete column (1) through the rectangular holes of the rectangular bottom plate (9) with the central hole through the vertical fillet welds at two sides.
5. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: the upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are short I-shaped steel beams which are made of two materials and have the same size, the external elongation is 1.0-1.5 times of the height of the H-shaped steel beam (2), the height of the beams is 0.5-1.0 times of the height of the H-shaped steel beam (2), the thicknesses of the upper flange, the lower flange and the web are 0.8-1.0 times of the thickness of the flange of the H-shaped steel beam (2), and the flange width is the same as that of the flange of the H-shaped steel beam (2).
6. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: the rectangular bottom plate (9) is a rectangular steel plate with a hole in the center.
7. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: and the outer side fillet weld (10) and the inner side fillet weld (11) are both right-angle fillet welds between the rectangular bottom plate (9) and the light square steel tube recycled concrete column (1).
8. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: the upper layer steel support (12) and the lower layer steel support (13) are hot-rolled H-shaped steel and are arranged between two adjacent light square steel tube recycled concrete columns (1) at an angle of 60-45 degrees; the width of the flange of the upper layer steel support (12) is equal to that of the upper limb (7) of the Pi-shaped connecting piece.
9. The middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece according to claim 1, wherein: the bench steel bars (15) are composed of two arched steel bars with anchoring ends at two sides and middle transverse connecting steel bars; .
10. The method for manufacturing the middle joint of the combined side column of the concrete filled steel tubular column, the H-shaped steel beam, the steel support and the pi-shaped connecting piece by using the joint as claimed in claim 1 is characterized in that: the specific implementation process of the method is as follows:
the first step is as follows: prefabricating a light square steel tube recycled concrete column (1) in a factory, selecting square steel tubes and steel plates with corresponding sizes, cutting, polishing and perforating, then pouring recycled concrete in the column, and finishing the manufacture of the light square steel tube recycled concrete column (1) through maintenance;
the second step is that: processing a pi-shaped connecting piece (3) and a web connecting plate (4) in a factory workshop, selecting a finished hot-rolled I-shaped steel beam with a corresponding size, cutting, polishing and punching to manufacture a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8), cutting and punching hot-rolled steel plates with corresponding thicknesses to manufacture a rectangular bottom plate (9) with a hole in the center; welding the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces with the rectangular bottom plate (9) to manufacture the pi-shaped connecting pieces (3); selecting steel plates with corresponding sizes and strengths to cut and open holes to manufacture a web connecting plate (4);
the third step: welding the pi-shaped connecting piece (3) and the web connecting plate (4) to the corresponding position of the light square steel tube recycled concrete column (1) in a factory workshop; firstly, welding a pi-shaped connecting piece (3) to a light square steel tube recycled concrete column (1), and paying attention to the fact that the pi-shaped connecting piece (3) is connected with the side face of the light square steel tube recycled concrete column (1) in a sticking welding mode through an outer side fillet weld (10) and an inner side fillet weld (11), so that the length of the weld is fully ensured by connecting the pi-shaped connecting piece (3) with the square steel tube column through two circles of rectangular full-weld fillet welds, and the shearing resistance bearing capacity and the bending resistance bearing capacity of the weld at a node are fully met; then, welding the web connecting plate (4) to the square steel pipe column through a central hole of the rectangular bottom plate (9); welding nuts to bolt holes of the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces to be ready for installing bolts;
the fourth step: arranging a stiffening rib welded at the web plate position at the end part of the H-shaped steel beam (2), wherein the thickness of the stiffening rib is not less than that of the web plate of the H-shaped steel beam (2); processing upper and lower flanges and web bolt holes of the H-shaped steel beam (2) according to the design position; finally, the top surface of the H-shaped steel beam (2) is welded with a stud;
the fifth step: processing an upper layer steel support (12) and a lower layer steel support (13) in a factory, selecting hot-rolled H-shaped steel meeting the section size requirement, polishing and cutting into corresponding sizes; selecting a steel plate, and processing and manufacturing a steel support bottom gusset plate through cutting, polishing and hole opening procedures; welding the machined steel support to the bottom gusset plate; finishing the processing of the prefabricated steel support;
and a sixth step: manufacturing a grouting material supporting plate (16) and a prefabricated recycled concrete floor slab (17), selecting a finished steel plate in a factory, cutting the steel plate into corresponding sizes, processing reinforcing steel bar hooks for anchoring on the grouting material supporting plate (16) through cutting and bending procedures, and spot-welding the reinforcing steel bar hooks onto the steel plate to complete the grouting material supporting plate; manufacturing and binding floor slab reinforcing steel bars, supporting a floor slab template, placing a grouting material supporting plate at the position of the opening, pouring floor slab recycled concrete, and maintaining and forming;
the seventh step: installing a light square steel tube recycled concrete column (1) with a Pi-shaped connecting piece (3) and a web connecting plate (4) on a construction site; cutting triangular gaps at the upper and lower ends of the H-shaped steel beam (2), sliding the H-shaped steel beam (2) between the pi-shaped connecting pieces (3) of the square steel pipe columns on the two sides, aligning bolt holes on the pi-shaped connecting pieces (3) and the web connecting plate (4) with bolt holes of the H-shaped steel beam (2), and screwing and fixing the H-shaped steel beam (2) by using high-strength bolts;
eighth step: mounting the prefabricated upper steel support (12) on the corresponding position of the upper limb (7) of the pi-shaped connecting piece through a high-strength bolt; mounting the prefabricated lower-layer steel support (13) on the corresponding position of the lower limb (8) of the pi-shaped connecting piece through a high-strength bolt;
the ninth step: mounting the prefabricated recycled concrete floor slab to a corresponding position;
the tenth step: placing the bench steel bars (15) at corresponding positions of webs of the upper limbs (7) of the pi-shaped connecting piece, screwing up 70mm through high-strength bolts (14) to fix the bench steel bars (15) at the webs of the upper limbs (7) of the pi-shaped connecting piece; binding the bench steel bars (15) to the floor slab steel bars (18);
the eleventh step: and (3) pouring high-strength grouting material at the positions of the floor shear-resistant studs (6), the pi-shaped connecting piece upper limbs (7), the bench reinforcements (15) and the grouting material supporting plate (16), and performing subsequent construction after maintenance is completed.
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| CN202010791479.0A CN111962953B (en) | 2020-08-07 | Concrete filled steel tube column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and manufacturing method |
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| CN202010791479.0A CN111962953B (en) | 2020-08-07 | Concrete filled steel tube column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column middle node and manufacturing method |
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