CN212927239U - Steel pipe concrete column-H steel beam-support-Pi-shaped combined corner column bottom node - Google Patents

Abstract

The utility model discloses a steel core concrete column-H girder steel-support-pi shape combination formula corner post bottom node, this node mainly comprise 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. Roof beam-post-props connected node, contrast prior art, the simple structure, it is convenient to be under construction, cost reduction. Meanwhile, the node has a definite force transmission path and two anti-seismic defense lines. The utility model discloses creatively assembles beam column node and steel shotcrete through pi shape connecting piece to carry out whole drawknot through cross stool drawknot reinforcing bar to diagonal column adjacent node domain and local floor with the assembled floor in the corner post position, its bending resistance, compressive capacity and stability obtain the reinforcing. The node is strong in integrity and excellent in anti-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 bottom 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 bottom node and way of doing all can belongs to structural engineering technical field.

Background

The fabricated building has the advantages of short construction period, high standardization degree, environmental protection, no pollution, low cost and the like, and meets the strategic requirements and the mainstream trend of the development of the building industry in China. The assembly and industrialization of residential buildings are important supports for realizing the modernization of the building industry. The industrial development of the assembled civil buildings, particularly the low-rise residential buildings in villages and small towns is very important. The development of the assembly type building and the environmental requirements of environmental protection, energy conservation and emission reduction are also inevitable trends in the development of the building industry. The development of assembly type and green energy-saving sustainable village and town residential buildings has a positive effect on the modernization level of the building industry in China.

The steel structure has the advantages of light weight, high strength and easy assembly construction. The assembled steel structure is an ideal structural system for the assembled development of village and town residences. However, the traditional steel structure is applied to the assembled village and town houses and has a plurality of problems: (1) component layer surface: in a traditional steel structure system, hot-rolled H-shaped steel is mostly adopted as a structural column in a steel structure factory building. For a residential structure with a building length-width ratio close to 1, an H-shaped steel column has a weak axis, and the shock resistance in the direction of the weak axis is weak, so that the difference of the shock resistance in the directions of two main axes of the residential building exists. And the H-shaped steel column has the risk of instability of the column bottom under the condition of large earthquake, so the H-shaped steel column is not suitable for assembled village and town houses. (2) node level: in the traditional steel structure, the beam column joint mostly adopts the joint forms of an outer ring plate type, an inner clapboard type, cast steel and the like. The traditional node forms have the disadvantages of large steel consumption, high cost and inflexible structural space arrangement. A large amount of welding work cannot be avoided on the construction site, and therefore the assembly rate is low. The force transmission paths of the nodes are complex, the stress analysis is difficult, the high requirements on designers are met, and the large-scale popularization is not suitable. Meanwhile, the traditional steel structure node has a complex structure and an irregular shape at the node part, so that some standardized assembled floor slabs and wall plates are difficult to be matched for use, and particularly, moisture-proof and waterproof structures at the position of a foundation beam are difficult to realize. The series of defects restrict the development of the assembled steel structure house. Therefore, the development of an assembled steel structural member and a suitable node form suitable for rural residential buildings is a problem to be solved urgently at present.

Concrete filled steel tubular columns have been commonly used in construction as a composite structure. The steel pipe in the combined member has a constraint effect on the core concrete, so that the axial compression performance and the ductility of the concrete are greatly improved, the instability of the steel pipe is also inhibited by the concrete, the compressive property, the bending resistance, the shearing resistance and other properties of the member are greatly improved by the combined effect of the steel pipe and the core concrete, the section size of the column is effectively reduced, and the steel consumption and the concrete consumption are reduced, so that the light steel pipe concrete column is applied. Therefore, concrete filled steel tubular columns are an ideal load bearing member for rural residences. Due to the fact that the cross section size of the steel tube concrete column is reduced (the size of the square steel tube concrete column of the village and town house is generally 100-150 mm), the overall lateral stiffness of the structure is reduced, and therefore steel supports are needed to be adopted to strengthen the overall stiffness of the structure. The concrete filled in the prefabricated floor slab and the steel tube in the residential building adopts the recycled concrete made of recycled aggregate, so that the aim of recycling and continuously utilizing building raw materials is fulfilled, and the development of the green building industry is facilitated. In conclusion, the light recycled steel pipe concrete column, the steel support, the H-shaped steel beam and the recycled concrete floor form a light steel combined frame structure.

The assembly rate of the steel structure beam column node determines the overall assembly rate of the structure to a certain extent. 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 bottom node and method of doing. The node has clear force transmission path, reasonable stress and two anti-seismic defense lines. Meanwhile, the integral assembly of the light steel pipe concrete column, the H-shaped steel beam, the steel support and the prefabricated floor slab is realized, and the integral design of the node area and the floor slab is realized. The assembled floor slab and the wallboard are convenient to install, no cold bridge exists at the node position, the integral energy-saving performance of the building is improved, and the construction of a waterproof and moistureproof structure at the foundation part is facilitated. The method is particularly suitable for the application at the bottom corner post of the assembled light steel composite structure.

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 corner post bottom node and way of doing so to solve the unreasonable, big, the complicated scheduling problem of structure of steel consumption volume of light steel frame house center pillar bottom beam column connected node atress. The problem of the prefabricated floor of corner post bottom position and steel shotcrete and beam column node dress connection structure 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 prefabricated steel support (10), a 70mm through high-strength bolt (11), a cross-shaped stool tie bar (12), an inner grouting material supporting plate (13), an outer and inner grouting material supporting plate (14), a prefabricated recycled concrete floor (15) and a floor steel bar (16). 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), the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are vertically symmetrical, 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 rectangular bottom plate (9) is a steel plate with a rectangular hole in the middle, and the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces are respectively welded on the rectangular bottom plate (9) in a full-welding mode to form the pi-shaped connecting pieces (3); 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 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 prefabricated steel support (10) is connected with the pi-shaped connecting piece upper limb (7) through a high-strength bolt (5) with the length of 30mm and a through high-strength bolt (11) with the length of 70 mm; the prefabricated recycled concrete floor slab (15) 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 (15) is bound with each other through a cross-shaped stool tie bar (12) and a floor slab bar (16) and is connected with each other through high-strength pouring grouting material; the inner grouting material supporting plate (13) and the outer grouting material supporting plate (14) are pre-buried in the prefabricated recycled concrete floor slab (15); the cross-shaped stool tie bars (12) are fixed at the web plate of the pi-shaped connecting piece upper limbs (7) through high-strength bolts (11) with the length of 70mm, and are bound with the floor slab reinforcing steel bars (16), 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 (15) 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 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. The connecting device is mainly used for connecting and fastening the H-shaped steel beam (2), the pi-shaped connecting piece (3) and the web connecting plate (4) and connecting the prefabricated steel support (10) and the upper limb (7) of the pi-shaped connecting piece. 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 (15) 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 (15) is completed.

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) 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 prefabricated steel support (10) is hot-rolled H-shaped steel and is 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 of the prefabricated steel support (10) is equal to that of the upper limb (7) of the Pi-shaped connecting piece, and the height of the web plate is generally 60-100 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 (11) with the length of 70 mm. The steel support is welded with the steel plate at the lower end of the steel support. The prefabricated steel support (10) 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 (11) is an S8.8S or S10.3 grade high-strength bolt. The upper end of the prefabricated steel support (10) is positioned on the upper surface of the bottom gusset plate, and the lower end of the 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 (11) is connected with a bottom gusset plate of the 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 (12) 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 (12) with the pi-shaped connecting piece (3).

The cross-shaped bench tie bar (12) is a prefabricated three-dimensional reinforcement cage. The cross-shaped bench tie bar (12) mainly consists of two vertically arranged bench-shaped tie bars. 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 (12) 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 (12) 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 (11). The other side of the cross-shaped stool tie bar (12) is bound with the floor slab steel bar (16). The connection form is the key for forming the node-floor integrated design, the cross-shaped stool tie steel bars (12) are fixed with the upper limbs (7) of the pi-shaped connecting pieces and the prefabricated recycled concrete floor (15) 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 (15) 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 tied steel bar (12) adopts 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 bar is 100mm, two ends of the arch-shaped steel bar form a 90-degree bent part, namely a 40mm long anchoring end, the bent end plays a role in anchoring the cross-shaped bench tied steel bar (12) in concrete, and the padding height of the cross-shaped bench tied steel bar (12) is 40mm to reach the same height as that of the distributed steel bars in the prefabricated recycled concrete floor slab (15), so that the steel bars can be bound conveniently. The longitudinal steel bar is 200mm long. The tie bar (12) 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 (13) 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 (15) and has the length of 200mm and the width of 200 mm. The inner grouting material supporting plate (13) is embedded into the lower part of the reserved hole before the prefabricated recycled concrete floor slab (15) 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 pi-shaped connecting piece upper limb (7), so that the inner grouting material supporting plate (13) ensures that grouting material does not leak from the bottom after the cross-shaped stool tie bar (12) and holes of the pi-shaped connecting piece upper limb (7) on two sides of the corner column are poured.

The outer grout supporting plate (14) is similar to the inner grout supporting plate (13). 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 (14) 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 (15) 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, the concrete is recycled 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 (12) 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 (16) are distributed reinforcing steel bars configured in the prefabricated recycled concrete floor slab (15), 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 (12).

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 bottom node and way of doing, its concrete way is as follows:

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, welding a foundation connecting plate at the bottom after cutting, polishing and perforating, pouring recycled concrete in the interior, 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, selecting 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 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 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 web plate of 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 prefabricated steel support (10) in a factory, selecting the hot-rolled H-shaped steel meeting the section size requirement, and grinding and cutting the hot-rolled H-shaped steel into a corresponding size. 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: grout layer board (13), outer grout layer board (14) and prefabricated recycled concrete floor (15) in the preparation, the mill selects the finished product steel sheet to cut into corresponding size, through processes such as cutting, buckling for the anchor on the anchor reinforcing bar crotch in grout layer board (13), outer grout layer board (14), 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 mounting the prefabricated steel support (10) on a corresponding position through a high-strength bolt. As shown in fig. 13.

The tenth step: and placing the cross-shaped stool tie bars (12) at corresponding positions, screwing 70mm through high-strength bolts (13) to fix the cross-shaped stool tie bars (12) at the web positions of the pi-shaped connecting piece upper limbs (7) at the two adjacent nodes. And the transverse arch-shaped tie bars at the two ends of the cross-shaped stool tie bar (12) are bound on the floor slab steel bar (16). And binding the longitudinal steel bars with the column plate tie bars (2) and the floor slab steel bars (16). 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 (12), the inner grouting material supporting plate (13), 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 bottom node and method 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 pi connecting pieces on the two sides of the corner post are not directly connected, 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 the bolt hole is connected with a bottom connecting plate of the 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 (15). The node-floor integrated design not only strengthens the cooperative work of the floor and the node, but also ensures that the floor in the corner post area is not easy to separate from the node under the action of earthquake. And the corner columns are adjacent to each other, and the nodes are connected by pulling, so that the seismic performance of the corner column nodes is greatly improved. 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 the pi-shaped connecting piece upper limb (7) is poured with the near grouting material, the node rigidity is greatly increased, and the shearing resistance of the node area is improved. Meanwhile, the local pressure bearing and shearing resistance of the pi-shaped connecting piece upper limb (7) are improved, and the connection reliability of the prefabricated steel support (10) and the pi-shaped connecting piece upper limb (7) is enhanced.

5. It is favorable for the construction of structures such as water-proof and damp-proof houses, heat preservation, water-proof and the like. The utility model discloses well prefabricated floor assembled position is located 300mm department more than the basis, and the bottom separates with the basis, more is favorable to house one deck dampproofing and waterproofing. Meanwhile, the pi-shaped connecting piece at the upper flange of the node is poured together with the floor slab, so that the installation of an external wall body and a heat insulation structure is facilitated, a cold bridge is avoided to a certain extent, and the heat insulation and energy conservation of a house are facilitated.

6. 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.

7. 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.

8. 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.

As shown in fig. 3, the combined corner post bottom node of the steel tube concrete post-H-shaped steel beam-steel support-pi-shaped connector comprises a light square steel tube recycled concrete post (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), a prefabricated steel support (10), a 70mm through high-strength bolt (11), a cross-shaped stool tie bar (12), an inner grouting material supporting plate (13), an outer grouting material supporting plate (13), a prefabricated recycled concrete floor (15) and a floor steel bar (16).

The required bearing capacity of the square steel tube recycled concrete column is calculated according to the load value borne by the square steel tube recycled concrete column in the structure, and the bearing capacity of the square steel tube recycled concrete column is adjusted by changing the outer diameter of the steel tube, the thickness of the steel tube, the strength of recycled concrete and the like.

Determining the beam height, the cantilever length and the thickness of an upper flange connecting part and a lower flange connecting part of a pi-shaped connecting piece according to the shearing force and the bending moment of the beam end of the H-shaped steel beam, and designing the size of the rectangular bottom plate, the size of a central opening of the rectangular bottom plate and the like; and meanwhile, the length and the thickness of the web connecting plate are designed by using the axial force, the shearing force and the bending moment of the beam end of the H-shaped steel beam as calculation basis, and the number of bolts and the welding length of the welding seam required by the node area are determined. The utility model relates to a rigidity of beam column node accessible above-mentioned parameter variation adjustment node junction realizes the design purpose of rigid node or semi-rigid node.

Design parameters such as the thickness of a floor slab, the diameter and the distance of distributed reinforcing steel bars, the strength of concrete and the like can be determined through a floor load value, and the size and the spatial distribution of the reserved hole channel are determined according to the size of the pi-shaped connecting piece and the shear bolts arranged on the H-shaped steel beam.

Determining design parameters such as the section size and the arrangement angle of the prefabricated steel support according to the relevant theory of the earthquake-resistant design of the building structure; after the parameter design is finished, the procedures of blanking, production, assembly and the like can be carried out.

And designing the plate, the steel bar in the column and the cross-shaped plate stool-shaped steel bar according to the section width of the light steel tube recycled concrete column and the opening size of the prefabricated floor slab.

The upper limbs of the pi-shaped connecting piece in the utility model are connected with the bottom beam and the steel support together, so that the upper flange of the connecting piece is subjected to local pressure and shearing force transmitted by the steel support, and the lower flange of the connecting piece is subjected to axial force, shearing force and bending moment transmitted by the bottom beam and is wholly in a complex stress state; the effective connection of the floor slab and the pi-shaped connecting piece is completed through structures such as bench-shaped tie bars, high-strength bolts and the like, the pi-shaped connecting piece is reinforced after pouring and grouting, and the local bearing capacity, the bending rigidity and the shearing-resistant bearing capacity of a node area are improved. The integrity of the plate-column-node system and the integrity of the node areas at two sides are enhanced by the stool-shaped tie bars and the tie bars in the plates and columns.

At the normal use stage, because the existence of pi shape connecting piece, the height of beam column nodal region can improve, and then makes the utility model discloses in the node has had great rigidity at the elasticity working phase, has effectively controlled the deformation of I shape cross-section roof beam, and it is too big to have avoided under the normal use state roof beam to produce too big amount of deflection and because the roof beam amplitude that outside vibrations load leads to.

Simultaneously, for realizing the design principle of "the weak component of strong node", the utility model relates to a web connecting plate and the welding of square steel tube recycled concrete post of pi shape connecting piece in the beam column node adopt bolted connection with H shaped steel roof beam, when the shear force of beam-ends, moment of flexure transmit welding seam and bolt department, the welding seam is the brittle failure with the destruction form of bolt, consequently need guarantee in the design phase that welding seam and bolt have higher safe richness. The failure mode of the node is designed to be beam end deformation failure, under the action of earthquake, the failure of the steel beam is concentrated at the flange bolt hole, and the flange undergoes a slow and obvious deformation process from yielding to breaking, so that the node has ideal ductile failure characteristics.

Node main power consumption parts is pi-shaped connecting piece under seismic action, thereby the edge of a wing of the I-shaped stub beam of encorbelmenting takes place to warp and consumes partial seismic energy about pi-shaped connecting piece under reciprocal load effect, and the web of the upper and lower I-steel stub beam of encorbelmenting will exert stiffening rib's effect, forms the depression bar truss system that draws of tie-beam end, also can consume partial seismic energy when control node warp. Along with the enhancement of horizontal earthquake action, the pi-shaped connecting piece as the first anti-seismic defense line loses efficacy, the web connecting plate still can continue to work as the second anti-seismic defense line to prevent the I-shaped steel beam from collapsing, the floor slabs in the node area are mutually extruded at the moment, the crack between the floor slab at the beam end and the wall is widened and even completely cracked, the duration of the process is longer, and the evacuation of personnel is facilitated. Because different beam column nodes are not directly related, the failure of one node can not cause the failure of other nodes, and the design principle of 'strong column and weak beam' can be realized.

Adopt a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula corner post bottom node firm in connection, wholeness good, the assembly is convenient, green, be applicable to low, many light steel frame and light steel truss residential building system beam column assembly's a novel nodal connection form.

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 bottom 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), the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are vertically symmetrical, 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 rectangular bottom plate (9) is a steel plate with a rectangular hole in the middle, and the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces are respectively welded on the rectangular bottom plate (9) in a full-welding mode to form the pi-shaped connecting pieces (3); 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 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 prefabricated steel support (10) is connected with the pi-shaped connecting piece upper limb (7) through a high-strength bolt (5) with the length of 30mm and a through high-strength bolt (11) with the length of 70 mm; the prefabricated recycled concrete floor slab (15) 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 (15) is bound with each other through a cross-shaped stool tie bar (12) and a floor slab bar (16) and is connected with each other through high-strength pouring grouting material; the inner grouting material supporting plate (13) and the outer grouting material supporting plate (14) are pre-buried in the prefabricated recycled concrete floor slab (15); the cross-shaped stool tie bars (12) are fixed at the web plate of the pi-shaped connecting piece upper limbs (7) through high-strength bolts (11) with the length of 70mm, and are bound with the floor slab reinforcing steel bars (16), 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 (15) are integrated.

2. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of 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.

3. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of claim 1, wherein: stiffening ribs with the thickness equal to 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) to improve the rigidity of the end parts; 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).

4. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of claim 1, wherein: the web connecting plate (4) is a rectangular steel plate, and 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); 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 plate connecting plate (4) is connected with the web plate of the H-shaped steel beam (2) through a high-strength bolt (5) with the length of 30 mm.

5. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of claim 1, wherein: the 30mm long high-strength bolt (5) is made of high-strength alloy steel.

6. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of claim 1, wherein: and after the prefabricated recycled concrete floor slab (15) is assembled, pouring high-strength grouting material at the reserved holes of the shear-resistant studs (6) of the floor slab.

7. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of 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 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) 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).

8. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of claim 1, wherein: 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 is adopted in light steel residential buildings.

9. The concrete filled steel tubular column-H steel beam-support-pi combination type corner column bottom node of claim 1, wherein: the cross-shaped bench tie bar (12) is a prefabricated three-dimensional reinforcement cage; the cross-shaped bench tie bar (12) consists of 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 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.

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