CN212927241U - Steel pipe concrete column-H steel beam-support-Pi-shaped combined corner column middle node - Google Patents

Abstract

The utility model discloses a steel core concrete column-H girder steel-support-pi shape combination formula corner post middle part node, this node mainly comprises light-duty square steel tube recycled concrete post, H shaped steel roof beam, pi shape connecting piece, web connecting plate, high strength bolt, steel shotcrete, cross stool drawknot muscle and prefabricated recycled concrete local floor. The beam-column-support connecting joint has the advantages of simple construction, green environmental protection, clear force transmission path and two anti-seismic defense lines. The utility model discloses well pi shape connecting piece has increased node domain height, and the node bearing capacity obtains improving, and the adjacent both sides pi shape connecting piece of corner post is discontinuous, has reduced the risk that the structure collapsed in succession. The adjacent node domain of corner post and floor are drawed with the cross bench drawknot reinforcing bar, and the node wholeness reinforcing. The node beam-column-support-floor slab is firm in connection, strong in integrity and excellent in seismic performance, and provides key technical support for the engineering design of the light steel composite structure of the assembly type green house.

Description

Steel pipe concrete column-H steel beam-support-Pi-shaped combined corner column middle node

Technical Field

The utility model relates to a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula corner post middle part node and way of doing, belong to structural engineering technical field.

Background

With the continuous promotion of national economy, the urbanization process of China is accelerated, the scale of construction engineering is also enlarged, and the actual requirements of people on buildings cannot be met by the traditional building structure form, so that the assembly type building structure comes into play and makes a great contribution to the development of the current building industry. Compared with the traditional building, the prefabricated structure building has the advantages of high construction speed and efficiency, short engineering construction period, good overall quality of the building, low cost, contribution to winter construction and good environmental protection performance. Meanwhile, with the proposal of environmental protection policies such as energy conservation and emission reduction of urban construction, sustainable development and the like, the prefabricated member design standardization, production industrialization, transport fluidization and installation specialization are realized in the assembly type building construction, the construction production efficiency is improved, meanwhile, the generation of building construction wastes is reduced, the method conforms to the national sustainable development strategy, and the method has wide development prospect.

In the construction process of the fabricated building, the steel structure construction has the advantages of high construction speed, less pollution, relatively high economic benefit, capability of reducing the self weight of the building and increasing the anti-seismic performance of the building, and the like, and is widely applied to the building industry. In recent years, the development of assembled steel structure house buildings is actively promoted in China, the living environment of villages and towns is greatly improved, the quality of houses is improved on the basis of ensuring the national poverty-relief standard, the energy is saved, the environment is protected, the construction period is shortened, and more new houses are suitable for adopting an assembled steel structure form system. However, steel structure houses encounter the following problems during construction: the road conditions of part of rural areas are difficult to meet the use requirements of component transportation and hoisting equipment; the field construction condition is poor, and the industrialization degree is not high. The traditional welding steel structure node is low in construction efficiency, large in steel consumption and inflexible in spatial arrangement, influences construction quality and construction period, increases construction cost, and is unfavorable for the steel structure applied to assembled village and town houses. There is therefore a need to develop fabricated steel structural members and suitable node forms for rural residential buildings.

The steel tube concrete column is a member formed by filling concrete in a steel tube, the strength of the concrete is improved due to the interaction of the steel tube and the concrete material in the stress process, the axial compression ductility is greatly improved, meanwhile, the local buckling of the steel tube can be avoided or delayed due to the existence of the concrete, and the stress performance and the bearing capacity of the member are greatly improved due to the combination of the steel tube and the concrete, so that the steel tube concrete column has the advantages of small section size, enlarged use space of a building and the like. The reduction of the section size of the steel pipe concrete column enables the integral lateral stiffness of the building structure to be reduced, so that the steel support is commonly used in the current engineering to increase the integral stiffness of the structure. The recycled concrete is prepared by reprocessing waste concrete to form recycled aggregate, is green concrete capable of sustainable development, accords with national sustainable development strategy, and is a development direction of concrete in the future. Compared with the traditional steel frame structure, the combined structure system formed by the light steel structure and the steel tube recycled concrete column has the advantages of less steel consumption, low manufacturing cost and higher industrialization degree. In conclusion, the light recycled steel pipe concrete column, the steel support and the H-shaped steel beam form a light steel combined frame structure.

The steel structure beam column node is the key point for forming lateral force resistance of a frame structure system, and the working state of the steel structure beam column node is directly related to the working performance of the frame structure. Based on this the utility model provides a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula corner post middle part node and method. The node is reasonable in form stress, simple to process, high in construction and assembly efficiency, good in stability and provided with two anti-seismic defense lines. The light steel pipe concrete column, the H-shaped steel beam, the steel support and the prefabricated recycled concrete floor slab can be integrally assembled on a construction site, and the parts can be produced in batches in a factory, so that the construction speed can be increased, the building can be conveniently disassembled, the disassembled steel can be reused, and the construction method is environment-friendly. The utility model discloses creative realization node domain-floor's integrated design has avoided the "cold bridge" drawback that the node position exists to the holistic energy-conserving performance of building has been improved. The utility model discloses specially adapted light steel integrated configuration middle part angle post department beam column connected node's of assembled application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula angle post middle part node and way of doing so to solve light steel frame house angle post middle part beam column connected node atress unreasonable, consume the steel volume big, the structure is complicated scheduling problem. The problem of the structure of the prefabricated floor slab at the bottom of the corner column and the joint connection of the steel support and the beam column is solved.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the node structure 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 shear-resistant stud (6), a pi-shaped connecting piece upper limb (7), a pi-shaped connecting piece lower limb (8), a rectangular bottom plate (9), an upper layer prefabricated steel support (10), a lower layer prefabricated steel support (11), a 70mm through high-strength bolt (12), a cross-shaped bench tie bar (13), an inner grouting material supporting plate (14), an outer grouting material supporting plate (15), a prefabricated recycled concrete floor (16) and a floor reinforcing bar (17). As shown in fig. 1, 2, 3 and 4

The utility model discloses a each parts are connected and are constituteed the relation as follows: the pi-shaped connecting piece (3) consists of a pi-shaped connecting piece upper limb (7), a pi-shaped connecting piece lower limb (8) and a rectangular bottom plate (9), wherein the rectangular bottom plate (9) is a steel plate with a rectangular hole in the middle, and the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are respectively welded on the rectangular bottom plate (9) in a full welding manner, so that the pi-shaped connecting piece (3) is formed; the light square steel tube recycled concrete column (1) is welded with the Pi-shaped connecting piece (3), four edges of the outer edge of the rectangular bottom plate (9) on the Pi-shaped connecting piece (3) are welded with the steel tube wall of the light square steel tube recycled concrete column (1) to form four fillet welds at the outer edge, four edges of the inner side of the rectangular bottom plate (9) with holes are welded with the steel tube wall of the light square steel tube recycled concrete column (1) to form four fillet welds at the inner edge, and therefore the light square steel tube recycled concrete column (1) is connected with 8 fillet welds at the outer side through the inner side and the single Pi-shaped connecting piece (3); the web plate connecting plate (4) is welded with the steel pipe wall of the light square steel pipe recycled concrete column (1) through two right-angle fillet welds and through an opening on the inner side of the rectangular bottom plate (9); the upper flange and the lower flange of the H-shaped steel beam (2) are connected with the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) of the pi-shaped connecting piece (3) through high-strength bolts (5) with the length of 30 mm; the web plate of the H-shaped steel beam (2) is connected with the web plate connecting plate (4) through a high-strength bolt (5) with the length of 30 mm; the upper-layer prefabricated steel support (10) is connected with the upper limb (7) of the Pi-shaped connecting piece through a high-strength bolt (5) with the length of 30mm and a through high-strength bolt (12) with the length of 70 mm; the lower prefabricated steel support (11) is connected with the lower limbs (8) of the Pi-shaped connecting piece through high-strength bolts (5) with the length of 30 mm; the prefabricated recycled concrete floor slab (16) is connected with the H-shaped steel beam (2) through the floor slab shear-resistant studs (6) and the high-strength grouting material; the prefabricated recycled concrete floor (16) is bound with each other through a cross stool tie bar (13) and a floor slab bar (17) and is connected with each other through high-strength pouring grouting material; the inner grouting material supporting plate (14) and the outer grouting material supporting plate (15) are pre-buried in the prefabricated recycled concrete floor slab (16); the cross-shaped stool tie bars (13) are fixed at the web plate of the pi-shaped connecting piece upper limbs (7) through high-strength bolts (12) with the length of 70mm, and are bound with the floor slab reinforcing steel bars (17), and after high-strength grouting materials are poured, the pi-shaped connecting piece upper limbs (7) on two adjacent sides of the corner posts and the prefabricated recycled concrete floor slab (16) are integrated.

The square steel tube in the light square steel tube recycled concrete column (1) is a square hot-rolled seamless steel tube. The outer diameter of the steel pipe is generally 100 mm-150 mm according to the design requirement. The wall thickness is 4 mm-8 mm, and the wall thickness is too thin, which easily causes the welding penetration of the steel pipe, so the wall thickness is recommended to be more than 4 mm. The internal filling concrete is recycled concrete, the grain diameter of the recycled coarse aggregate is 5-20 mm, and the strength of the concrete is C30-C50. The square steel pipe can be used as a concrete pouring template, so that construction is more convenient and cost is saved. 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. After the recycled concrete material is used, the environment-friendly advantage is achieved.

The H-shaped steel beam (2) is a main bearing component in a light steel frame structure, and mainly bears the load of a wall body and a floor slab and transmits the load to the light square steel tube recycled concrete column (1). The light steel composite structure generally adopts hot-rolled H-shaped steel beams as main beams or secondary beams. In order to avoid local buckling of the end part of the H-shaped steel beam (2) due to stress concentration of the connecting constructional column with the node, stiffening ribs with the thickness equal to that 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) so as to improve the rigidity of the end part. 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), in order to prevent the upper and lower flanges of the H-shaped steel beam at the welding seam from being tightly attached to the wall of the steel pipe column, a 7mm triangular notch needs to be polished vertically at the end part of the H-shaped steel beam (2) close to one side of the column wall before assembly, and accurate alignment of bolt holes is guaranteed. The shear studs are uniformly arranged on the top surface of the H-shaped steel beam (2) and are ready for the installation of the fabricated floor slab.

The pi-shaped connecting piece (3) is a key part of a beam-column joint of the light steel combined frame 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 web connecting plate is the same as that of the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8), the width of the web connecting plate is 80% of the height of the rectangular hole of the rectangular bottom plate (9), and the thickness of the web connecting plate is equal to that 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 two vertical fillet welds through a rectangular hole in the center of the rectangular bottom plate (9). The web connecting plate (4) is connected with the web of the H-shaped steel beam (2) through the 30mm long high-strength bolt (5) 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 failure of the beam column node caused by the damage of the Pi-shaped connecting piece (3) to the light steel frame can be effectively prevented, and the continuous collapse of the structure is caused. 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 side fillet weld of the rectangular bottom plate (9) and the light square steel tube recycled concrete column (1) can be avoided. The axis of the web connecting plate (4) deviates from the center line of the web 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 center line of the web plate can coincide with the center of the width of the section of 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 link 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 S8.8 and S10.9 are adopted in the assembled light steel house. The length of the nut is generally 10-20 mm of the nut. The H-shaped steel beam connecting device is mainly used for connecting and fastening an H-shaped steel beam (2), a pi-shaped connecting piece (3) and a web connecting plate (4) and connecting an upper-layer prefabricated steel support (10) and a pi-shaped connecting piece upper limb (7). Meanwhile, 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 structure for reinforcing the connection between the H-shaped steel beam (2) and the fabricated recycled concrete floor and can serve as a floor shear key, the length of the floor shear-resistant stud is 40mm, the diameter of the floor shear-resistant stud is 10mm, one channel is arranged along the top surface of the upper flange of the beam, and two channels are arranged at the end part of a node and used for reinforcement. The horizontal distance is 80-150 mm, and after the prefabricated recycled concrete floor slab (16) is assembled, high-strength grouting material is poured at the reserved holes of the shear-resistant studs (6) of the floor slab, so that the connection between the H-shaped steel beam (2) and the prefabricated recycled concrete floor slab (16) is completed.

The upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are short I-shaped steel beams made of two materials and having the same size, the external elongation of the short I-shaped steel beams is 1.0-1.5 times of the height of the H-shaped steel beam (2), the height of the short I-shaped steel 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. The upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are vertically welded on the rectangular bottom plate (9) 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 a 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 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 on 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 light square steel tube recycled concrete column (1) through an outer side fillet weld and an inner side fillet weld in a sticking welding mode, 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 outside fillet weld 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 an inner side fillet weld 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.

The upper-layer prefabricated steel support (10) and the lower-layer prefabricated steel support (11) are hot-rolled H-shaped steel and are generally arranged between two adjacent light square steel tube recycled concrete columns (1) at an angle of 60-45 degrees. The width of the flange is equal to that of the upper limb (7) of the Pi-shaped connecting piece, and the height of the web plate is generally 60 mm-100 mm. 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 steel plate with bolt holes by a high-strength bolt (5) with the length of 30mm and a through high-strength bolt (12) with the length of 70 mm. The steel support is welded with the steel plate at the lower end of the steel support. The steel support mainly plays a role 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 (12) is an S8.8 or S10.3 grade high-strength bolt. The upper end of the upper-layer prefabricated steel support (10) is positioned on the upper surface of the bottom gusset plate, and the lower end of the upper-layer prefabricated steel support is positioned on the lower surface of the upper flange of the H-shaped steel beam (2). The 70mm through high-strength bolt (12) is connected with a bottom gusset plate of the upper-layer prefabricated steel support (10), 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 cross-shaped stool tie bar (13) is clamped at the position of the web plate of the pi-shaped connecting piece upper limb (7) to play a role in connecting the cross-shaped stool tie bar (13) with the pi-shaped connecting piece (3).

The cross-shaped bench tie bar (13) is a prefabricated three-dimensional reinforcement cage. The cross-shaped bench tie bar (13) mainly comprises two bench-shaped tie bars which are vertically arranged. The bench-shaped tie bar is formed by welding two arched steel bars at two ends and two longitudinal steel bars in the middle. The two bench-shaped tie bars are vertically intersected, and then the longitudinal steel bars of the two bench-shaped tie bars, which are intersected, are welded to form a cross-shaped layout. One ends of two orthogonal stool tie bars in the cross stool tie bars (13) are placed at the upper limbs (7) of the Pi-shaped connecting pieces at two adjacent node positions of the corner column, and the cross stool tie bars (13) are fixed with the upper limbs (7) of the Pi-shaped connecting pieces at the two adjacent node positions of the corner column through 70mm through high-strength bolts (12). The other side of the cross-shaped stool tie bar (13) is bound with the floor slab steel bar (17). The connection form is the key for forming the node-floor integrated design, the cross-shaped stool tie steel bars (13) are fixed with the upper limbs (7) of the pi-shaped connecting pieces and the prefabricated recycled concrete floor (16) through the arched steel bars on the two sides, and the tie of the upper limbs (7) of the pi-shaped connecting pieces and the prefabricated recycled concrete floor (16) is realized through the longitudinal steel bars in the middle. Meanwhile, the special cross-shaped structure realizes the pulling connection between the node areas at two adjacent sides of the pouring position and the prefabricated floor slab. The cross-shaped bench tie bars (13) adopt phi HRB 335-grade steel bars which are the same as those of the prefabricated recycled concrete floor slab, the length of the arch-shaped steel bars is 100mm, two ends of the arch-shaped steel bars form a 90-degree bending part and a 40-mm long anchoring end, the bending ends play a role in anchoring the cross-shaped bench tie bars (13) in concrete, and the padding height of the cross-shaped bench tie bars (13) is 40mm to reach the same height as that of the distributed steel bars in the prefabricated recycled concrete floor slab (16), so that the steel bars can be bound conveniently. The longitudinal steel bar is 200mm long. The tie bar (13) of the integrated cross-shaped bench is a cross-shaped three-dimensional reinforcement cage with the length and the width of 200 mm.

The inner grouting material supporting plate (14) is a thin steel plate with three edges welded with embedded anchoring steel bar hooks, the thickness of the thin steel plate is 3mm, the size length of the rectangular steel plate is 210mm, and the width of the rectangular steel plate is 210 mm. Slightly larger than a grouting hole which is reserved on the prefabricated recycled concrete floor (16) and has the length of 200mm and the width of 200 mm. The inner grouting material supporting plate (14) is embedded into the lower portion of the reserved hole before the prefabricated recycled concrete floor slab (16) 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 inner grouting material supporting plate (14) ensures that grouting material does not leak from the bottom after the cross-shaped stool tie bar (13) and holes of the upper limb (7) of the pi-shaped connecting piece on two sides of the corner column are poured.

The outer grout supporting plate (15) is similar to the inner grout supporting plate (14). The grouting material is located on the outer sides of two adjacent nodes of the corner post and mainly used for ensuring that the grouting material does not leak when the grouting material is grouted into the concrete when the web of the upper limb (7) of the Pi-shaped connecting piece is located on one side outside the node. The thickness of the outer grouting material supporting plate (15) is 3mm, the width is 70mm, and the length is 210 mm. The outer side of the web plate of the upper limb (7) of the Pi-shaped connecting piece of the column can be completely sealed, and slurry does not leak when grouting material is poured.

The prefabricated recycled concrete floor (16) 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 equal to that of the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces, 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. Grouting holes with the length of 200mm and the width of 200mm are reserved for pi-shaped connecting piece upper limbs (7) at two adjacent nodes of the corner columns of the prefabricated floor slab, and the upper surface of the floor slab is flush with the upper flange surface of the pi-shaped connecting piece upper limbs (7). And after the cross-shaped stool tie bars (13) are placed in the grouting holes, high-strength grouting material is poured, so that the reserved holes and the two sides of the web of the pi-shaped connecting piece upper limb (7) are filled with the grouting material, and the purpose of joint work of the floor slab and the assembly type node is achieved.

The floor slab reinforcing steel bars (17) are distributed reinforcing steel bars configured in the prefabricated recycled concrete floor slab (16), and the distributed reinforcing steel bars exposed out of the reserved holes play a role in being connected with the cross-shaped bench tie bars (13).

The utility model relates to a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula corner post middle part node and way of doing, its concrete way is as follows:

the first step is as follows: the method comprises the following steps of prefabricating a light square steel tube recycled concrete column (1) in a factory, purchasing square steel tubes and steel plates with corresponding sizes, welding a basic connecting plate at the bottom after cutting, polishing and perforating, pouring recycled concrete in the square steel tube recycled concrete column, and finishing the manufacturing of the square steel tube recycled concrete column (1) through maintenance. As shown in fig. 5.

The second step is that: processing Pi-shaped connecting pieces (3) and web connecting plates (4) at two adjacent sides of corner columns in a factory workshop, purchasing finished hot-rolled I-shaped steel beams with corresponding sizes, cutting, polishing, punching and the like to manufacture Pi-shaped connecting piece upper limbs (7) and Pi-shaped connecting piece lower limbs (8), cutting and punching hot-rolled steel plates with corresponding thicknesses to manufacture a rectangular bottom plate (9). 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 (3) purchasing steel plates with corresponding sizes and strengths, cutting and perforating to manufacture the web connecting plate (4). As shown in fig. 6.

The third step: and welding the Pi-shaped connecting piece (3) and the web connecting plate (4) to corresponding positions of two adjacent sides of the light square steel tube recycled concrete column (1) in a factory workshop. Firstly, two Pi-shaped connecting pieces (3) are welded on a light square steel tube recycled concrete column (1), and attention should be paid to that the Pi-shaped connecting pieces (3) are connected with the side face of the light square steel tube recycled concrete column (1) in an attaching and welding mode through outer side fillet welds and inner side fillet welds, so that the Pi-shaped connecting pieces (3) are connected with the square steel tube column through two circles of rectangular full-weld fillet welds, the length of the welds is fully ensured, and the shearing resistance bearing capacity and the bending resistance bearing capacity of the welds at nodes are fully met. And then the two web connecting plates (4) are welded to the square steel pipe column through the 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 beam end 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 bolt holes of the upper flange, the lower flange and the web plate 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 the upper prefabricated steel support (10) and the lower prefabricated steel support (11) in a factory, purchasing hot-rolled H-shaped steel meeting the section size requirement, and grinding and cutting the hot-rolled H-shaped steel into corresponding sizes. And (3) purchasing 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: grout layer board (14), outer grout layer board (15) and prefabricated recycled concrete floor (16) in the preparation, the mill purchases the finished product steel sheet and cuts into corresponding size, through cutting, processes such as buckling in the grout layer board (14), the reinforcing bar crotch for the anchor on outer grout layer board (15), with reinforcing bar crotch spot welding to the steel sheet processing completion grout layer board. 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: the light square steel tube recycled concrete corner column (1) with the Pi-shaped connecting piece (3) and the web connecting plate (4) is installed on a construction site, and the steel tube concrete column is installed on a foundation through the foundation connecting plate. 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 (6), 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 installing the prefabricated recycled concrete floor slab to a corresponding position. As shown in fig. 12.

The ninth step: and the upper-layer prefabricated steel support (10) and the lower-layer prefabricated steel support (11) are installed on corresponding positions through high-strength bolts. As shown in fig. 13.

The tenth step: and placing the cross-shaped stool tie bars (13) to corresponding positions, screwing 70mm through high-strength bolts (13) and fixing the cross-shaped stool tie bars (13) at the web positions of the pi-shaped connecting piece upper limbs (7) of the two adjacent nodes. And the transverse arch-shaped tie bars at the two ends of the cross-shaped stool tie bar (13) are bound on the floor slab steel bar (17). And binding the longitudinal steel bars with the column plate tie bars (2) and the floor slab steel bars (17). As shown in fig. 14.

The eleventh step: and (3) pouring high-strength grouting materials at the positions of the floor shear-resistant studs (6), the pi-shaped connecting piece upper limbs (7), the cross-shaped stool tie bars (13), the inner grouting material supporting plate (14), the outer grouting material supporting plate (14) and the like, and performing subsequent construction after maintenance is finished. As shown in fig. 15.

Compared with the prior art, the utility model relates to a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula corner post middle part node and way of doing, have following advantage:

1. the utility model discloses creatively proposes to use light-duty square steel tube recycled concrete post in villages and small towns residential structure: 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. Due to the combined action of the thin-wall steel pipe and the filled concrete, the size of the section of the column can be greatly reduced compared with that of a concrete structure, and the steel consumption of the column is further reduced compared with that of a steel structure column.

2. The utility model discloses creative this structure of adoption pi shape connecting piece (3) carries out the assembly connection between roof beam post: 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 (9) 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. Meanwhile, the pi-shaped connecting pieces are only required to be arranged on one side with the beam, and the pi-shaped connecting pieces at different positions on the same column are not continuous. If the adjacent two sides of the corner post are not directly connected with the Pi-shaped connecting piece, the node on one side fails, and the node on the other side is not influenced. The risk of the structure collapsing in succession is reduced.

3. The utility model discloses creative assembles nodal connection structure and steel shotcrete structure: and an upper flange of an upper limb (7) of the Pi-shaped connecting piece in the Pi-shaped connecting piece (3) is provided with a bolt hole and is connected with a bottom connecting plate of the upper-layer prefabricated steel support (10) by adopting 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.

4. The utility model discloses creative use cross shaped plate bench shape drawknot reinforcing bar (12) to carry out the drawknot with the double-phase adjacent node of corner post and prefabricated floor to combine into a whole with pi shape connecting piece upper limbs (7) through grouting material and cross shaped plate bench shape drawknot reinforcing bar (12) and prefabricated recycled concrete floor (16). The node-floor integrated design not only strengthens the cooperative work of the floor and the node, so that the floor in the corner post area is not easy to separate from the node under the action of earthquake, but also ties the nodes by adjacent corner posts, thereby greatly improving the earthquake resistance of the corner post node. Meanwhile, near grouting materials are poured at the web plate position of the upper limb (7) of the Pi-shaped connecting piece to form a similar steel reinforced concrete structure, and the structure is different from any existing traditional steel structure node. After grouting materials are poured on the upper limbs (7) of the Pi-shaped connecting pieces, the rigidity of the nodes is greatly increased, and the shearing resistance of the node areas is improved. Meanwhile, the local bearing and shearing resistance of the pi-shaped connecting piece upper limb (7) is improved, and the connection reliability of the upper-layer prefabricated steel support (10) and the pi-shaped connecting piece upper limb (7) is enhanced.

5. The atress is clear and definite, possesses two antidetonation defence lines. The utility model relates to a node connection structure design is simple and convenient, the reliability is high. The I-shaped section beam transfers building load to the beam column node, axial force, shearing force and bending moment of the I-shaped section beam are transferred to the Pi-shaped connecting piece and the web connecting plate through the bolts, and finally acting force transfer between the I-shaped section beam and the steel pipe column is achieved through welding seams 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 utility model relates to a square steel tube recycled concrete post, pi shape connecting piece, web connecting plate, H shaped steel roof beam etc. all can be prefabricated at the engineering, and the job site is assembled. 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 utility model relates to a prefabricated connecting piece consumes the steel volume few, adopts environmental protection and energy saving materials such as recycled concrete, and the node subassembly adopts hot rolling shaped steel more, and the material is easy and can realize no waste material basically. The utility model provides a node structure construction method will cause noise pollution, light pollution's process to put in the mill easily and go on, when guaranteeing construction quality, can accomplish green.

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 floor slab.

FIG. 13 step 9-assembly of the steel support.

FIG. 14 step 10-Straps fix bench rebar.

Fig. 15 step 11 — pour grout.

Detailed Description

The following further describes the present invention with reference to specific embodiments.

A steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined corner 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), a pi-shaped connecting piece upper limb (7), a pi-shaped connecting piece lower limb (8), a rectangular bottom plate (9), an upper-layer prefabricated steel support (10), a 70mm through high-strength bolt (12), a cross-shaped bench tie bar (13), an inner grouting material supporting plate (14), an outer grouting material supporting plate (15), a prefabricated recycled concrete floor slab (16) and a floor slab bar (17).

The size of the building load is obtained through the engineering example, the bearing capacity of the square steel tube recycled concrete column can be obtained through calculation, and the section area, the thickness of the steel tube wall and the strength of the internally filled recycled concrete of the square steel tube recycled concrete column are adjusted. Through the calculation to the moment of flexure, shear force and the axial force of H shaped steel roof beam end, design pi shape connecting piece flange and web thickness, the height and the length of encorbelmenting of girder steel, the size and the central trompil size of rectangular bottom plate, the length and the thickness of adjustment web connecting plate, can calculate simultaneously and obtain reasonable quantity and the fillet weld length of bolt under this node domain, need local thickening flange and web thickness in node domain department, make it guarantee certain plasticity, strengthen the stability in node domain. The design of beam column node accessible control above-mentioned parameter change, realize the conversion of rigid node and semi-rigid node.

Design parameters such as floor size, diameter and spacing of distributed reinforcing steel bars, recycled concrete strength and the like are designed by consulting building design specifications and calculating 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 type and the arrangement position of the shear bolt on the beam.

According to the calculation of the lateral stiffness and the bearing capacity of the frame and the structural seismic design theory, the length-thin ratio, the diameter-thickness ratio, the section size and the arrangement angle of the steel support are determined, and after the parameters are determined, the procedures such as industrial production construction, equipment and the like can be carried out.

And designing plate column tie bars and cross bench-shaped tie bars according to the section sizes of the light steel pipe recycled concrete column and the Pi-shaped connecting piece and the size of the opening of the prefabricated recycled concrete floor slab.

In the normal use stage, the height of the steel structure beam column node domain can be increased due to the existence of the pi-shaped connecting piece, so that the node has strong bending and shearing bearing capacity, plastic hinge of the column can not occur, and the light steel frame structure has good ductility under the earthquake action, thereby having better earthquake resistance. Because the upper limb of the pi-shaped connecting piece is connected with the bottom beam and the steel support by the bolt at the same time, the upper flange of the pi-shaped connecting piece is subjected to local pressure and shearing force transmitted downwards by the steel support; the lower flange is connected with the steel support and the bottom beam, and the whole body is in a complex stress state under the action of axial force, bending moment and shearing force transmitted downwards by the bottom beam, so that the bending rigidity and the shearing resistance bearing capacity of a node area are improved.

Recycled concrete floor passes through the cross bench shape drawknot reinforcing bar with pi shape connecting piece and constructional connection such as high strength bolt in this patent, makes the grout fill in reservation hole and pi shape connecting piece web both sides behind the grout that pours high strength, makes floor and assembled node combined work, and the regional floor of corner post is difficult for under the seismic action and breaks away from with the node, also very big promotion local pressure-bearing nature and the anti shear capacity of pi shape connecting piece web.

Among the beam column node, pi connecting piece passes through welded connection with web connecting plate and square steel tube recycled concrete post, and pi connecting piece adopts bolted connection with H shaped steel roof beam. After the shearing force and the bending moment applied to the beam end of the steel beam are transmitted to the bolt and the welding seam, the damage is in the form of bolt shearing and welding seam cracking, and the two kinds of damage are brittle damage. Therefore, it is necessary to ensure sufficient safety reserves of the weld and the bolt at the design stage to avoid brittle failure.

The basic principle of "weak component of strong node" should be followed in steel construction antidetonation design, promptly under the earthquake effect, when some anti side force component got into the yield state, the node of connecting these components can not take place destruction at first, but through the plasticity circulation power consumption of these components, reaches the purpose that reduces the structure earthquake effect, the utility model discloses in show the structure of reinforcing beam column node promptly, make the H shaped steel roof beam of node connection take place destruction earlier than the node. The damage position of the steel beam under the action of earthquake is concentrated at the bolt hole of the beam flange, and the beam flange is firstly yielded and then broken, and the damage is a slow process with obvious deformation and has good ductile damage characteristic. Beam column node mainly consumes energy through pi shape connecting piece under the earthquake effect, under reciprocal load effect, pi shape connecting piece warp through the edge of a wing of upper and lower limbs and consumes seismic energy, and the web is similar to the stiffening rib simultaneously, guarantees local stability, and control node warp, also can consume partial seismic energy. The node has twice antidetonation defence line, wherein pi shape connecting piece is first way antidetonation defence line, and the web connecting plate is the second way antidetonation defence line. When the horizontal earthquake action is increased and the first anti-seismic defense line fails, the second anti-seismic defense line can continue to play a role to prevent the steel beam from collapsing and being damaged. When the pi-shaped connecting piece is damaged, the floor slabs near the node are mutually extruded, the crack between the floor slabs and the wall surface is gradually widened till the crack is formed, but the damage process is very slow, and precious time is provided for safely and reasonably evacuating people. Simultaneously the utility model discloses also accord with the design criteria of "strong post weak beam", specifically be pi shape connecting piece and only need arrange in one side that has the roof beam, the adjacent both sides pi shape connecting piece of corner post is not associated, therefore other departments of one side node failure node can not receive the influence, prevents that the structure from taking place to collapse in succession.

Adopt a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula corner post middle part node simple structure, economical and practical, rigidity is big, the power consumption ability reinforce, the installation rate is fast, green, anti-seismic performance is good, be applicable to low, the novel node form of multilayer light steel frame and light steel truss building house system beam column node assembly, but wide application in assembled villages and small towns house simultaneously.

The above is an exemplary embodiment of the present invention, and the implementation of the present invention is not limited thereto.

Claims (9)

1. A steel pipe concrete column-H girder steel-support-Pi shape combination formula corner post middle part node which characterized in that: the pi-shaped connecting piece (3) consists of a pi-shaped connecting piece upper limb (7), a pi-shaped connecting piece lower limb (8) and a rectangular bottom plate (9), wherein the rectangular bottom plate (9) is a steel plate with a rectangular hole in the middle, and the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are respectively welded on the rectangular bottom plate (9) in a full welding manner, so that the pi-shaped connecting piece (3) is formed; the light square steel tube recycled concrete column (1) is welded with the Pi-shaped connecting piece (3), four edges of the outer edge of the rectangular bottom plate (9) on the Pi-shaped connecting piece (3) are welded with the steel tube wall of the light square steel tube recycled concrete column (1) to form four fillet welds at the outer edge, four edges of the inner side of the rectangular bottom plate (9) with holes are welded with the steel tube wall of the light square steel tube recycled concrete column (1) to form four fillet welds at the inner edge, and the light square steel tube recycled concrete column (1) is connected with the single Pi-shaped connecting piece (3) through eight fillet welds at the inner side and the outer side; the web plate connecting plate (4) is welded with the steel pipe wall of the light square steel pipe recycled concrete column (1) through two right-angle fillet welds and through an opening on the inner side of the rectangular bottom plate (9); the upper flange and the lower flange of the H-shaped steel beam (2) are connected with the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) of the pi-shaped connecting piece (3) through high-strength bolts (5) with the length of 30 mm; the web plate of the H-shaped steel beam (2) is connected with the web plate connecting plate (4) through a high-strength bolt (5) with the length of 30 mm; the upper-layer prefabricated steel support (10) is connected with the upper limb (7) of the Pi-shaped connecting piece through a high-strength bolt (5) with the length of 30mm and a through high-strength bolt (12) with the length of 70 mm; the lower prefabricated steel support (11) is connected with the lower limbs (8) of the Pi-shaped connecting piece through high-strength bolts (5) with the length of 30 mm; the prefabricated recycled concrete floor slab (16) is connected with the H-shaped steel beam (2) through the floor slab shear-resistant studs (6) and the high-strength grouting material; the prefabricated recycled concrete floor (16) is bound with each other through a cross stool tie bar (13) and a floor slab bar (17) and is connected with each other through high-strength pouring grouting material; the inner grouting material supporting plate (14) and the outer grouting material supporting plate (15) are pre-buried in the prefabricated recycled concrete floor slab (16); the cross-shaped stool tie bars (13) are fixed at the web plate of the pi-shaped connecting piece upper limbs (7) through high-strength bolts (12) with the length of 70mm, and are bound with the floor slab reinforcing steel bars (17), and after high-strength grouting materials are poured, the pi-shaped connecting piece upper limbs (7) on two adjacent sides of the corner posts and the prefabricated recycled concrete floor slab (16) are integrated.

2. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the square steel tube in the light square steel tube recycled concrete column (1) is a square hot-rolled seamless steel tube, and the filled concrete is recycled concrete.

3. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the H-shaped steel beam (2) is a bearing component in a light steel frame structure, and mainly bears the load of a wall body and a floor slab and transmits the load to the light square steel tube recycled concrete column (1); the light steel composite structure adopts hot-rolled H-shaped steel beams as main beams or secondary beams; in order to avoid local buckling of the end part of the H-shaped steel beam (2) due to stress concentration of a connecting constructional column with a node, stiffening ribs with the thickness equal to that 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 the rigidity of the end part; the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces are welded with the rectangular bottom plate (9); before assembly, triangular notches are ground at the upper part and the lower part of the end part of the H-shaped steel beam (2) close to one side of the column wall.

4. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the pi-shaped connecting piece (3) is a key part of a beam-column joint of the light steel combined frame 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.

5. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the web connecting plate (4) is a rectangular steel plate, the length of the web connecting plate is the same as that of the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8), the width of the web connecting plate is 80% of the height of the rectangular hole of the rectangular bottom plate (9), and the thickness of the web connecting plate is equal to that 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 two vertical fillet welds through a rectangular hole in the center of the rectangular bottom plate (9).

6. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the floor shear-resistant stud (6) is used as a floor shear key for connecting the reinforced H-shaped steel beam (2) with the fabricated recycled concrete floor.

7. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are two short I-shaped steel beams which are made of the same material 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 beam 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 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) 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 a 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 of the H-shaped steel beam (2); therefore, certain gaps can be reserved on the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces, and the H-shaped steel beams (2) can be smoothly assembled on the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces; the Pi-shaped connecting piece (3) is connected with the light square steel tube recycled concrete column (1) through an outer side fillet weld and an inner side fillet weld in a sticking welding mode, and the quality control grade of the weld is one grade or two grades.

8. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the upper-layer prefabricated steel support (10) and the lower-layer prefabricated steel support (11) 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, and the width of a flange is equal to that of an upper limb (7) of the Pi-shaped connecting piece.

9. The middle joint of the concrete-filled steel tubular column-H steel beam-support-pi-shaped combined corner column as claimed in claim 1, wherein: the cross-shaped bench tie bar (13) is a prefabricated three-dimensional reinforcement cage; the cross-shaped bench tie bar (13) mainly comprises two bench-shaped tie bars which are vertically arranged; the bench-shaped tie bars are formed by welding two arched bars at two ends and two longitudinal bars in the middle; the two stool-shaped tie bars are vertically crossed, and then the crossed longitudinal steel bars of the two stool-shaped tie bars are welded to form a cross-shaped layout; one end of two orthogonal stool tie bars in the cross stool tie bars (13) is placed at the upper limbs (7) of the Pi-shaped connecting pieces at two adjacent node positions of the corner column, and the cross stool tie bars (13) are fixed with the upper limbs (7) of the Pi-shaped connecting pieces at two adjacent node positions of the corner column through 70mm through high-strength bolts (12); the other side of the cross-shaped stool tie bar (13) is bound with the floor slab steel bar (17).

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