CN212927240U - Steel pipe concrete column-H steel beam-support-Pi-shaped combined side column bottom node - Google Patents

Steel pipe concrete column-H steel beam-support-Pi-shaped combined side column bottom node Download PDF

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CN212927240U
CN212927240U CN202021631423.0U CN202021631423U CN212927240U CN 212927240 U CN212927240 U CN 212927240U CN 202021631423 U CN202021631423 U CN 202021631423U CN 212927240 U CN212927240 U CN 212927240U
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steel
shaped
connecting piece
column
plate
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曹万林
杨兆源
董宏英
张奕慧
乔崎云
张建伟
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Beijing University of Technology
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Beijing University of Technology
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Abstract

The utility model discloses a steel core concrete column-H girder steel-support-pi shape combination formula side post bottom node, this node mainly comprise square steel tube recycled concrete post, H shaped steel roof beam, pi shape connecting piece, web connecting plate, high strength bolt, steel shotcrete, stool 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, and it is clear and definite to pass the power route, has twice antidetonation defence line. The utility model discloses creatively assembles beam column node and steel shotcrete through pi shape connecting piece to forming wholly through stool reinforcing bar and nodal connection with assembled floor part, the reliability that steel shotcrete and pi shape connecting piece are connected has been guaranteed to bending resistance, compressive capacity and the stability reinforcing of node. 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 side 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 side column bottom node and way of doing, belong to structural engineering technical field.
Background
With the continuous development of residential construction in China, the research and development of the assembled earthquake-resistant energy-saving green house building becomes a great demand for national construction. The assembled light steel composite structure with energy conservation, environmental protection, simple and convenient construction and good anti-seismic performance is suitable for the mainstream development direction of the current residential building system, and the key point for realizing the engineering application of the assembled light steel composite structure is to develop a novel light steel frame, a light steel truss beam column connecting node and a corresponding assembled member.
In most fabricated light steel dwellings, the building aspect ratio is close to unity. If the traditional steel structure factory building is referred to and I-shaped section columns are adopted, the difference of the moments of inertia of the columns in the directions of the two anti-seismic main shafts is too large, and the instability risk exists at the bottoms of the columns. Therefore, the adoption of the traditional I-shaped steel column not only can consume a large amount of steel, but also can cause very adverse effects on the seismic performance of the structure. The square steel tube recycled concrete column is used as a combined structural member, the inertia moments in the two main shaft directions are the same, and the working performance of the column in a complex stress state is obviously superior to that of an I-shaped section column. A large number of researches prove that the cross-sectional area of the steel tube concrete column can be effectively reduced by using the steel tube concrete column, the steel consumption is greatly saved, and meanwhile, the recycled concrete used as the internal filling material has the environmental protection advantage. Therefore, the square steel tube recycled concrete column is an ideal structural form of the load-bearing member of the assembled light steel house. Because the vertical load born by the assembled light steel house is small, the section size of the steel tube concrete column can be basically controlled to be 100-150 mm. Along with the reduction of the section size of the column, the lateral force resistance and the overall rigidity of the whole structure need certain construction measures to make up, and the arrangement of the inclined supports among the columns is an efficient measure for improving the overall anti-seismic performance and the lateral rigidity resistance of the structure.
Based on the engineering background, the design of a steel pipe concrete column-H-shaped steel beam-oblique steel support node which is reliable in mechanical property, convenient to assemble, environment-friendly, economical, green and sustainable is an urgent problem to be solved. The common structural forms of the connection of the square steel tube concrete column-steel beam nodes at present comprise outer ring plate type nodes, inner partition plate type nodes, cast steel nodes and the like, and the application of the node forms in light steel houses is limited to a certain extent. The node is mainly suitable for high-rise and large-span buildings, has large steel consumption, complex design and high assembly difficulty, and is not suitable for low-rise and multi-storey residential houses with small load and high assembly degree. More importantly, the node does not provide a good solution for the assembly of the diagonal support and the prefabricated floor slab, and particularly, the node at the position, close to the foundation, of the light steel house needs a node connection form which is easier to assemble and construct and does not influence the construction of heat insulation, water resistance and the like. 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 side column bottom node and way of doing, this node has overcome the single and complicated drawback of beam column node assembled floor construction of traditional node antidetonation defence line, has that the simple structure, the atress are clear and definite, anti-seismic performance is good, the convenient advantage of construction. And meanwhile, the prefabricated steel supports and the prefabricated floor slab are creatively connected at the beam-column joints of the foundation column base part through a series of construction measures. The method is particularly suitable for application of the bottom connecting node of the low-rise and multi-storey light steel frame structure house, improves the economy and the assembly efficiency of the light steel house on the premise of ensuring the safe and reliable structure, and provides technical reference for house industrialization and building assembly.
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 side column bottom node and way of doing so to solve among the light steel frame house light steel frame bottom beam column node and steel shotcrete connection position atress unreasonable, consume the steel volume big, the structure is complicated, be unfavorable for the assembly construction scheduling problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a steel tube concrete column-H-shaped steel beam-steel support-pi-shaped connecting piece combined side column bottom node comprises a 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), an outer side corner welding seam (10), an inner side corner welding seam (11), a steel support (12), a 70mm through high-strength bolt (13), a stool steel bar (14), a grouting material supporting plate (15), a prefabricated recycled concrete floor (16) and a floor steel bar (17).
The connection relation of all parts of the node is as follows: the pi-shaped connecting piece (3) is formed by welding a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8) on a rectangular bottom plate (9) with a hole in the center through a right-angle fillet weld, the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are symmetrical up and down, and the side parts of the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are connected through the rectangular bottom plate (9). The pi-shaped connecting piece (3) is connected with the side surface of the square steel tube recycled concrete column (1) in a sticking welding mode through an outer side fillet weld (10) and an inner side fillet weld (11). The H-shaped steel beam (2) is connected with the Pi-shaped connecting piece (3) through a 30mm long high-strength bolt (5), and the floor shear-resistant studs (6) are uniformly welded on the top surface of the upper flange of the H-shaped steel beam (2) at equal intervals. One section of the web connecting plate (4) penetrates through a rectangular hole in the center of the rectangular bottom plate (9) to be welded with the square steel tube recycled concrete column (1) through right-angle fillet welds on two sides, and the other end of the web connecting plate is connected with the web position of the beam end of the H-shaped steel beam (2) through a 30mm long high-strength bolt (5). The steel support (12) is connected with the pi-shaped connecting piece upper limb (7) through a connecting plate with a bolt hole at the lower part through a 30mm long high-strength bolt (5) and a 70mm through high-strength bolt (13). One end of the bench steel bar (14) is fixed at the web position of the upper limb (7) of the pi-shaped connecting piece through a 70mm through high-strength bolt (13), and the other end of the bench steel bar extends into the prefabricated and regenerated concrete floor (16) and is bound with the floor steel bar (17). The prefabricated recycled concrete floor slab (16) is assembled with the H-shaped steel beam (2) through the shear bolt preformed hole and the preformed hole at the position of the grouting material supporting plate (15), and the grouting material supporting plate (15) is embedded in the prefabricated recycled concrete floor slab (16).
The square steel tube in the square steel tube recycled concrete column (1) is a seamless steel tube formed by one-time hot rolling, and the section of the steel tube is square. The outer diameter of the steel pipe is 100 mm-150 mm, the wall thickness is 4 mm-8 mm, the recycled concrete is filled in the steel pipe, and the grain size of the recycled coarse aggregate is 5 mm-20 mm. The square steel tube recycled concrete column (1) has the following advantages: the square steel tube has a restraint effect on the filling of the recycled concrete, so that the bearing capacity of the recycled concrete is improved, and the ductility of the concrete is enhanced; the buckling of the steel pipe is limited by filling the recycled concrete in the steel pipe, and the instability and damage of the steel pipe can be effectively avoided. In practical engineering, the steel tube concrete column has the advantages of high rigidity, high bearing capacity, good fire resistance and corrosion resistance and the like.
The H-shaped steel beam (2) is a main bearing component in a light steel frame structure, bears the load of a wall body and a floor slab and transmits the load to the column. The light steel frame is typically a hot rolled H-section steel beam. In order to avoid the local buckling of the end part of the H-shaped steel beam (2) due to local stress concentration, stiffening ribs with the thickness not less than the thickness of a web plate of the H-shaped steel beam (2) are arranged on the outer sides of an upper limb (7) and a lower limb (8) of a pi-shaped connecting piece of the pi-shaped connecting piece (3) to improve 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 (8), the positions of welding seams are raised, and 5mm triangular notches need to be ground vertically on the end parts of the H-shaped steel beams (2) before assembly, so that accurate alignment of bolt holes is guaranteed. The top surface of the H-shaped steel beam (2) is uniformly provided with shear-resistant studs to prepare for the installation of the fabricated floor slab.
The pi-shaped connecting piece (3) is a key part of a light steel frame and a light steel truss beam column node and consists of a pi-shaped connecting piece upper limb (7), a pi-shaped connecting piece lower limb (8) and a rectangular bottom plate (9) with a central hole.
The web connecting plate (4) is a rectangular steel plate, the length of the 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 0.8 times of the height of a rectangular hole of the rectangular bottom plate (9) with the hole formed in the center, and the thickness of the web connecting plate is 1.0-1.2 times of 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 column wall of the square steel tube recycled concrete column (1) through the rectangular holes of the rectangular bottom plate (9) with the central hole through the vertical fillet welds at two sides. The web connecting plate (4) is connected with the web of the H-shaped steel beam (2) through the high-strength bolt to form a joint anti-seismic second defense line. Tests prove that the web connecting plate (4) can still provide reliable bending resistance and shearing resistance bearing capacity for the node after the Pi-shaped connecting piece (3) fails under the action of an earthquake, so that the light steel frame can be effectively prevented from continuously collapsing due to failure of the beam-column node. The width of the web connecting plate (4) is smaller than the height of the rectangular hole of the rectangular bottom plate (9), so that the inner fillet weld (11) can be avoided from being welded on the column wall of the square steel tube recycled concrete column (1). The axial line of the web connecting plate (4) deviates from the axial line of the weak axis of the H-shaped steel beam (2) by 0.5 time of the sum of the thickness of the web connecting plate (4) and the thickness of the web of the H-shaped steel beam (2). The axis can coincide with the 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. 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 H-shaped steel beam (2) and the fabricated concrete slab and can serve as a floor shear key, the length of the floor shear-resistant stud is about 40mm, the diameter of the floor shear-resistant stud is 8-10 mm, one or two studs are arranged along the top surface of the upper flange of the beam, the horizontal distance is 80-150 mm, and the floor shear-resistant stud can be integrally cast with the concrete floor during floor construction or can be placed at a post-cast strip of the fabricated floor for casting.
The upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are short I-shaped steel beams which are made of two materials and have the same size, the external elongation is 1.0-1.5 times of the height of the H-shaped steel beam (2), the height of the beams is 0.5-1.0 times of the height of the H-shaped steel beam (2), the thicknesses of the upper flange, the lower flange and the web are 0.8-1.0 times of the thickness of the flange of the H-shaped steel beam (2), and the flange width is the same as that of the flange of the H-shaped steel beam (2). The upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are vertically welded on the rectangular bottom plate (9) with the central hole through fillet welds, the upper limbs (7) and the lower limbs (8) of the Pi-shaped connecting pieces are symmetrically arranged about the centroid of the rectangular bottom plate (9) with the central hole, and the centroid distances from the bottom of the lower flange of the upper I-shaped steel cantilever short beam and the top of the upper flange of the lower I-shaped steel cantilever short beam to the rectangular bottom plate (9) with the central hole are respectively 0.55 times of the beam height length of the H-shaped steel beam (2). Therefore, a certain gap can be reserved between the upper limb (7) and the lower limb (8) of the pi-shaped connecting piece, and the H-shaped steel beam (2) can be smoothly assembled between the upper limb (7) and the lower limb (8) of the pi-shaped connecting piece. The Pi-shaped connecting piece (3) is connected with the side surface of the square steel tube recycled concrete column (1) in a welding mode through an outer side fillet weld (10) and an inner side fillet weld (11), and the quality control grade of the weld is one grade or two grades.
The rectangular bottom plate (9) is a rectangular steel plate with a hole in the center. The strength of the material is the same as that of steel used for the square steel tube recycled concrete column (1), and Q345 steel can be adopted in light steel residential buildings. The height of the connector is 300mm, and the size requirements of the right-angle fillet weld of the connector and the Pi-shaped connector upper limb (7) and the Pi-shaped connector lower limb (8) are met. The width of the connecting piece is 100mm, namely the connecting piece is as wide as the upper limbs (7) of the pi-shaped connecting piece and the lower limbs (8) of the pi-shaped connecting piece, and the size requirement of the outer side angle welding seam (10) is met. The width of a rectangular hole in the middle of the rectangular bottom plate (9) is 60mm, the height of the rectangular hole is 140mm, and the size requirement of the inside fillet weld (11) is met. The rectangular bottom plate (9) mainly plays a role in connection transition of the 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 square steel tube recycled concrete column (1), and protects the steel tube column wall of the part from being corroded.
And the outer side fillet weld (10) and the inner side fillet weld (11) are both right-angle fillet welds between the rectangular bottom plate (9) and the square steel tube recycled concrete column (1). The height of the welding leg is 8mm, and a first-level and a second-level welding line are adopted. The two welding seams transmit the bending moment, the axial force and the shearing force transmitted by the Pi-shaped connecting piece (3) to the square steel tube recycled concrete column (1) through the rectangular bottom plate (9), and the effect of transmitting load is mainly achieved.
The steel support (12) is hot-rolled H-shaped steel and is generally arranged between two adjacent square steel tube recycled concrete columns (1) at an angle of 60-45 degrees. The width of the flange of the steel support (12) 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 high-strength bolt through a steel plate with a bolt hole. The steel support is welded with the steel plate at the lower end of the steel support. The steel support (12) 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 (13) is an S8.8S or S10.3 grade high-strength bolt. The upper end of the upper end is positioned on the upper surface of the gusset plate at the bottom of the steel support (12), and the lower end is positioned on the lower surface of the upper flange of the H-shaped steel beam (2). The 70mm through high-strength bolt (13) is connected with a bottom gusset plate of the steel support (12), a pi-shaped connecting piece upper limb (7) and an upper flange of the H-shaped steel beam (2). The three parts are connected into a whole, and one side of the bench steel bar (14) is clamped at the position of the web plate of the upper limb (7) of the pi-shaped connecting piece, so that the function of connecting the bench steel bar (14) and the pi-shaped connecting piece (3) is achieved.
The bench steel bar (14) is a prefabricated forming steel bar. The steel bar anchor is composed of two arched steel bars with anchor ends on two sides and a middle transverse connecting steel bar, wherein the arched steel bars on the two sides are 80mm long, and the right-angle anchor ends are 30mm long. The length of the two middle transverse connecting steel bars is 70mm, and the distance between the two middle transverse connecting steel bars is 60 mm. The two ends of the steel bar are fixed with the arched steel bar in a spot welding or binding mode to form a prefabricated three-dimensional steel bar mesh. The bench reinforcing steel bars (14) are composed of HRB335 phi 8 reinforcing steel bars, extend into the preformed holes of the prefabricated recycled concrete floor slab (16) and are bound with the exposed floor reinforcing steel bars (17), the other ends of the bench reinforcing steel bars are fixed at the positions of webs of the upper limbs (7) of the pi-shaped connecting piece through high-strength bolts (13) of 70mm, and two bench reinforcing steel bars (14) are symmetrically arranged on two sides of the webs of the upper limbs (7) of the pi-shaped connecting piece. The design of the steel bar net is a 'stool' shape, which is beneficial to anchoring between the steel bar net and the floor slab steel bar (17) and the grouting material, and meanwhile, the anchoring end faces downwards, the steel bar net can be heightened to enable the steel bar net and the floor slab steel bar (17) to be positioned at the same height for binding.
The grouting material layer board (15) is trilateral the steel sheet that has the pre-buried anchor reinforcing bar crotch of welding, and its thickness is 3mm, and rectangle steel sheet size length is 120mm, and the width is 110 mm. Slightly larger than a grouting hole which is reserved on the prefabricated recycled concrete floor (16) and has the length of 100mm and the width of 100 mm. The grouting material supporting plate (15) 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 bottom of the poured grouting material can be prevented from leaking.
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. The prefabricated floor slab is characterized in that the upper surface of the floor slab with the reserved holes for the pi-shaped connecting piece upper limbs (7) at the joints is flush with the surface of the upper flange of the pi-shaped connecting piece upper limbs (7). Grouting holes 100mm long and 100mm wide are reserved on two sides of a web plate of an upper limb (7) of the pi-shaped connecting piece, and high-strength grouting material is poured after bench steel bars (14) are placed in the grouting holes, so that the grouting material is filled in the reserved holes and two sides of the web plate of the upper limb (7) of the pi-shaped connecting piece, and the purpose of joint work of a floor slab and an assembly type node is achieved.
The floor slab reinforcing steel bars (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 bench reinforcing steel bars (14).
The utility model relates to a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula side column bottom node and way, its concrete way is as follows:
the first step is as follows: the method comprises the following steps of prefabricating a square steel tube recycled concrete column (1) in a factory, purchasing a square steel tube and a steel plate 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. 4.
The second step is that: machining a pi-shaped connecting piece (3) and a web connecting plate (4) in a factory workshop, purchasing a finished hot-rolled I-shaped steel beam with a corresponding size, cutting, polishing, punching and the like to manufacture a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8), cutting and punching hot-rolled steel plates with corresponding thicknesses, and manufacturing a rectangular bottom plate (9) with a central hole. And welding the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces with the rectangular bottom plate (9) to manufacture the pi-shaped connecting pieces (3). And (3) purchasing steel plates with corresponding sizes and strengths, cutting and perforating to manufacture the web connecting plate (4). As shown in fig. 5.
The third step: and welding the phi-shaped connecting piece (3) and the web connecting plate (4) to the corresponding position of the square steel tube recycled concrete column (1) in a factory workshop. Firstly, welding a pi-shaped connecting piece (3) to a square steel tube recycled concrete column (1), and paying attention to the fact that the pi-shaped connecting piece (3) is connected with the side face of the square steel tube recycled concrete column (1) in an attaching and welding mode through an outer side fillet weld (10) and an inner side fillet weld (11), so that the length of the weld is fully guaranteed and the shearing-resistant bearing capacity and the bending-resistant bearing capacity of the weld at a node are fully met by connecting the pi-shaped connecting piece (3) with the square steel tube column through two circles of rectangular full-weld fillet welds. And then the web connecting plate (4) is welded to the square steel pipe column through a central hole of the rectangular bottom plate (9). And welding nuts to bolt hole positions of the upper limbs (7) and the lower limbs (8) of the pi-shaped connecting pieces to be ready for installing bolts. As shown in fig. 6.
The fourth step: and a stiffening rib is welded at the end part of the H-shaped steel beam (2). The thickness of the stiffening rib is not less than that of the web plate of the H-shaped steel beam (2). And the bolt holes of the upper flange, the lower flange and the web plate of the H-shaped steel beam (2) are processed 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. 7.
The fifth step: and (3) processing the steel support (12) in a factory, purchasing 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 (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. 8.
And a sixth step: manufacturing a grouting material supporting plate (15) and a prefabricated recycled concrete floor slab (17), purchasing a finished steel plate in a factory, cutting the steel plate into corresponding sizes, processing reinforcing steel bar hooks for anchoring on the grouting material supporting plate (15) through procedures such as cutting, bending and the like, and spot-welding the reinforcing steel bar hooks on the steel plate to complete the grouting material supporting plate. And manufacturing and binding floor slab reinforcing steel bars, supporting a floor slab template, placing a grouting material supporting plate at the opening, pouring floor slab recycled concrete, and maintaining and forming. As shown in fig. 9.
The seventh step: a square steel tube recycled concrete column (1) with a Pi-shaped connecting piece (3) and a web connecting plate (4) is installed on a construction site, and the steel tube recycled concrete column is installed on a foundation through a 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 (2), sliding the H-shaped steel beam (2) between the pi-shaped connecting pieces (3) of the square steel pipe columns on the two sides, aligning bolt holes on the pi-shaped connecting pieces (3) and the web plate connecting plate (4) with bolt holes of the H-shaped steel beam (2), and screwing and fixing the H-shaped steel beam (2) by using high-strength bolts. As shown in fig. 10.
Eighth step: and mounting the prefabricated steel support (12) on a corresponding position through a high-strength bolt. As shown in fig. 11.
The ninth step: and installing the prefabricated recycled concrete floor slab to a corresponding position. As shown in fig. 12.
The tenth step: and (3) placing the bench steel bars (14) to corresponding positions, screwing 70mm through high-strength bolts (13) to fix the bench steel bars (14) at the web positions of the upper limbs (7) of the pi-shaped connecting pieces. And the bench rebars (14) are tied to the floor rebars (17). As shown in fig. 13.
The eleventh step: and (3) pouring high-strength grouting material at the positions of the floor shear-resistant studs (6), the pi-shaped connecting piece upper limbs (7), the bench reinforcements (14), the grouting material supporting plate (15) and the like, and performing subsequent construction after maintenance is completed. As shown in fig. 14.
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 side column bottom node and way of doing, have following advantage:
1. 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 (8) with the central hole is welded on the square steel tube recycled concrete column (1) in an attaching mode, so that steel materials on the column wall of the node cannot be directly exposed in the air, and the corrosion resistance of the node is improved. The whole node has strong bending and shearing bearing capacity.
2. The utility model discloses creative assembles nodal connection structure and steel shotcrete structure: the upper flange of the upper limb (7) of the Pi-shaped connecting piece in the Pi-shaped connecting piece (3) is provided with a bolt hole which is connected with the bottom connecting plate of the steel support (12) by a bolt. The steel support can be assembled in the frame assembling stage through the structural form, and the support can be installed without additionally arranging other parts in the later stage. The construction steps are greatly simplified, the cost is saved, and the construction efficiency is improved.
3. The utility model discloses creative carries out the integrated design with assembled floor through stool reinforcing bar and nodal connection position: the prefabricated recycled concrete floor slab (16) is provided with a hole at the connecting part of the prefabricated recycled concrete floor slab and the pi-shaped connecting piece upper limb (7), the floor slab reinforcing steel bars (17) are exposed inside the prefabricated recycled concrete floor slab, and the floor slab reinforcing steel bars (17) are bound with the bench reinforcing steel bars (14). The bench steel bar (14) is fixed with the pi-shaped connecting piece upper limb (7) through a 70mm through high-strength bolt (13). And finally, pouring a rigid grouting material at the starting part to form the prefabricated floor slab-stool steel bar-pi-shaped connecting piece connecting structure. The structure ensures that the prefabricated floor slab is reliably connected with the node area, and the bending resistance, the compression resistance and the stability of the pi-shaped connecting piece are greatly enhanced after the steel pipe grouting material is poured into the pi-shaped connecting piece. The reliability of the connection structure of the steel support and the pi-shaped node is further ensured.
4. 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 upper limbs (7) of the Pi-shaped connecting pieces of the node are 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.
5. The node structure is simple in design, and the arrangement is flexible in an assembled light steel frame and light steel truss structure. No matter be outer annular plate formula or interior division board formula beam column node in the current node structure, all adopt integral design to side column, corner post and center pillar, not only consume a large amount of steel but also can cause the naked design problem of beam column node. And the utility model relates to a node structure only need install and connect one side at the beam column, only need set up pi connecting piece and web connecting plate in one side that has the roof beam and improved the flexibility that the node was arranged greatly and reduced the loss of steel, bolt. Meanwhile, the pi-shaped connecting piece is beneficial to construction and installation of the assembled wallboard and the floor slab. Although the rigidity and the seismic performance of the joint are improved by the joint with the triangular rib plate, the installation of the assembled wallboard and the floor slab at the joint of the triangular rib plate is complex, and the treatment such as local corner cutting of the wallboard and the floor slab is not avoided. The utility model discloses well pi shape connecting piece structural style of design is more regular, and pi shape connecting piece can be hidden in assembled wall or outer wall heat preservation, better solution the drawback that assembled steel structure house exposed beam, exposed post.
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 in the mill, and the job site is assembled. The large-scale production precision is high, the quality control is strict, and the resources are saved. 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 bottom view of the node.
FIG. 4 step 1-manufacture of recycled steel tubular concrete column.
FIG. 5, step 2-manufacture of the Pi-shaped connector and web connection plate.
FIG. 6 step 3-welding of the pi connector.
FIG. 7, step 4-fabrication of I-beam bottom beam.
FIG. 8 step 5-making a steel support.
Fig. 9 step 6-fabrication of prefabricated recycled concrete floor.
Fig. 10 step 7-assembly of beam column.
FIG. 11 step 8-Assembly of the steel support.
Fig. 12 step 9-assembly of floor slab.
FIG. 13, step 10-Straps of fixed bench rebar.
FIG. 14, step 11-casting grout.
Detailed Description
The following further describes the present invention with reference to specific embodiments.
As shown in fig. 3, the combined side column bottom node of the steel tube concrete column, the H-shaped steel beam, the steel support and the pi-shaped connector comprises a square steel tube recycled concrete column (1), an H-shaped steel beam (2), a pi-shaped connector (3), a web connecting plate (4), a 30mm long high-strength bolt (5), a floor shear-resistant stud (6), a pi-shaped connector upper limb (7), a pi-shaped connector lower limb (8), a rectangular bottom plate (9), an outer side corner welding seam (10), an inner side corner welding seam (11), a steel support (12), a 70mm through high-strength bolt (13), a bench steel bar (14), a grouting material supporting plate (15), a prefabricated recycled concrete floor (16) and a floor steel bar (17).
The bearing capacity required by the square steel tube recycled concrete column can be calculated according to the building load, and the square steel tube recycled concrete column can be adjusted by adjusting the outer diameter and thickness of the steel tube, the strength of recycled concrete and the like. The method comprises the steps of designing main parameters such as flange and web thickness, beam height, overhanging length and the like of upper and lower I-steel overhanging short beams of the Pi-shaped connecting piece according to bending moment and shearing force of the beam end of the H-shaped steel beam, and determining the length and thickness of a rectangular bottom plate, the size of a central opening and the like. Meanwhile, the length and the thickness of the web connecting plate are adjusted according to the axial force, the shearing force and the bending moment of the end of the H-shaped steel beam, and the number of bolts needed by a node area, the length of a welding seam and the like are calculated. The utility model relates to a beam column node accessible above-mentioned parameter design changes control node connection rigidity, realizes the design target of rigid node or semi-rigid node.
And designing parameters such as the thickness of a floor slab, the strength of concrete, the diameter of distributed reinforcing steel bars, the distance between the distributed reinforcing steel bars and the like according to the floor load. And determining the position and the size of the reserved hole according to the size of the pi-shaped connecting piece and the arrangement of the shear bolts on the beam.
According to the relevant theory of structural seismic design, parameters such as the section size of the steel support, the arrangement angle and the like are determined. After the data are determined, the procedures of blanking, production, construction, assembly and the like can be carried out.
At the normal use stage, pi shape connecting piece has increased the height in beam column nodal region, consequently the node has great rigidity at the elastic working stage, has effectively controlled the deformation of I shape cross-section roof beam, has avoided the too big and external vibrations load excitation underbeam seismic amplitude too big defect of roof beam amount of deflection under normal use state.
Simultaneously, the floor has carried out effective connection through structures such as stool reinforcing bar and high strength bolt with pi shape connecting piece in this node, has strengthened pi shape connecting piece after later stage pouring grout material. The upper limb of the Pi-shaped connecting piece is simultaneously connected with the bottom beam and the steel support, the upper flange of the Pi-shaped connecting piece is subjected to local pressure and shearing force transmitted by the steel support, and the lower flange of the Pi-shaped connecting piece is subjected to axial force, bending moment and shearing force transmitted by the bottom beam and is in a complex stress state as a whole. After grouting materials are poured around the web plate, the local bearing performance and the shearing resistance bearing capacity of the web plate are greatly improved. Meanwhile, the bending rigidity of the node area is improved, and the shearing resistance and bearing capacity are improved.
Meanwhile, in order to meet the design principle of 'strong node and weak member', the beam-column node is reinforced, and the I-shaped steel beam connected with the node is damaged before the node. The utility model relates to a beam column node, pi shape connecting piece and web connecting plate use welded connection with square steel tube recycled concrete column, adopt bolted connection with H shaped steel roof beam, after beam-ends shear force and moment of flexure transmission to bolt and welding seam, the bolt is cut off and is brittle failure with the welding seam fracture. It is therefore necessary to ensure an adequate safety reserve of welds and bolts at the design stage. The failure mode of the node is designed to be beam end deformation failure, the failure position of the steel beam is concentrated at the bolt hole of the beam flange under the action of an earthquake, and the section of the steel beam flange at the position undergoes the process from yielding to breaking, which is a slow process with obvious deformation and has ideal ductile failure characteristics. Node is pi-shaped connecting piece in the main power consumption region of seismic action, thereby the I-steel was encorbelmented the edge of a wing of stub beam and is taken place to warp and consume partial seismic energy about pi-shaped connecting piece under reciprocal load effect, thereby the web of the upper and lower I-steel was encorbelmented the stub beam 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 increase of horizontal earthquake action, the Pi-shaped connecting piece serving as the first anti-seismic defense line of the node fails, and the web connecting plate serving as the second anti-seismic defense line can still continue to work to prevent the collapse of the I-shaped steel beam. At the moment, the floor slabs in the node areas are mutually extruded, the cracks between the floor slabs at the beam ends and the wall are widened and even completely cracked, the duration of the process is long, and people can be evacuated. Because different beam column nodes are not directly related, the failure of a certain node can not cause the failure of other nodes at the position, thereby conforming to the design principle of 'strong column and weak beam'.
Adopt a steel core concrete column-H shaped steel roof beam-steel shotcrete-pi shape connecting piece combination formula side 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 a novel nodal connection pattern.
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 side column bottom node which characterized in that: the pi-shaped connecting piece (3) is formed by welding a pi-shaped connecting piece upper limb (7) and a pi-shaped connecting piece lower limb (8) on a rectangular bottom plate (9) with a hole in the center through a right-angle fillet weld, the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are symmetrical up and down, and the side parts of the pi-shaped connecting piece upper limb (7) and the pi-shaped connecting piece lower limb (8) are connected through the rectangular bottom plate (9); the pi-shaped connecting piece (3) is connected with the side surface of the square steel tube recycled concrete column (1) in a sticking welding way through an outer side fillet weld (10) and an inner side fillet weld (11); the H-shaped steel beam (2) is connected with the pi-shaped connecting piece (3) through a 30mm long high-strength bolt (5), and the floor shear-resistant studs (6) are uniformly welded on the top surface of the upper flange of the H-shaped steel beam (2) at equal intervals; one section of the web connecting plate (4) penetrates through a rectangular hole in the center of the rectangular bottom plate (9) to be welded with the square steel tube recycled concrete column (1) through right-angle fillet welds on two sides, and the other end of the web connecting plate is connected with the web position of the beam end of the H-shaped steel beam (2) through a 30mm long high-strength bolt (5); the steel support (12) is connected with the upper limb (7) of the Pi-shaped connecting piece through a connecting plate with a bolt hole at the lower part thereof by a high-strength bolt (5) with the length of 30mm and a through high-strength bolt (13) with the length of 70 mm; one end of the bench steel bar (14) is fixed at the web position of the upper limb (7) of the pi-shaped connecting piece through a 70mm through high-strength bolt (13), and the other end of the bench steel bar extends into the prefabricated and regenerated concrete floor (16) and is bound with the floor steel bar (17); the prefabricated recycled concrete floor slab (16) is assembled with the H-shaped steel beam (2) through the shear bolt preformed hole and the preformed hole at the position of the grouting material supporting plate (15), and the grouting material supporting plate (15) is embedded in the prefabricated recycled concrete floor slab (16).
2. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the square steel tube in the square steel tube recycled concrete column (1) is a seamless steel tube formed by one-time hot rolling, the section of the steel tube is square, and recycled concrete is filled in the steel tube.
3. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the H-shaped steel beam (2) is hot rolled steel.
4. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the web connecting plate (4) is a rectangular steel plate, the length of the web connecting plate is the same as that of an upper limb (7) and a lower limb (8) of the pi-shaped connecting piece, the width of the web connecting plate is 0.8 times of the height of a rectangular hole of a rectangular bottom plate (9) with a hole at the center, and the thickness of the web connecting plate is 1.0-1.2 times of the thickness of a web of the H-shaped steel beam (2); one side of the web plate connecting plate (4) is vertically welded on the column wall of the square steel tube recycled concrete column (1) through the rectangular holes of the rectangular bottom plate (9) with the central hole through the vertical fillet welds at two sides; the web plate connecting plate (4) is connected with the web plate of the H-shaped steel beam (2) through a high-strength bolt.
5. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the rectangular bottom plate (9) is a rectangular steel plate with a hole in the center.
6. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: and the outer side fillet weld (10) and the inner side fillet weld (11) are both right-angle fillet welds between the rectangular bottom plate (9) and the square steel tube recycled concrete column (1).
7. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the steel support (12) is hot rolled steel and is arranged between two adjacent square steel tube recycled concrete columns (1) at an angle of 60-45 degrees; the width of the flange of the steel support (12) is equal to that of the upper limb (7) of the pi-shaped connecting piece.
8. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the upper end of the 70mm through high-strength bolt (13) is located on the upper surface of the gusset plate at the bottom of the steel support (12), and the lower end of the 70mm through high-strength bolt is located on the lower surface of the upper flange of the H-shaped steel beam (2).
9. The bottom node of the concrete filled steel tubular column-H steel beam-support-pi-shaped combined side column according to claim 1, characterized in that: the bench steel bar (14) is a prefabricated forming steel bar; it is composed of two arched reinforcing bars with anchoring ends at both sides and a transverse connecting reinforcing bar in the middle.
CN202021631423.0U 2020-08-07 2020-08-07 Steel pipe concrete column-H steel beam-support-Pi-shaped combined side column bottom node Active CN212927240U (en)

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