Fabricated row concrete filled steel tube structure

Abstract

The fabricated row concrete-filled steel tube structure comprises a row concrete-filled steel tube shear wall, a concrete-filled steel tube composite column and a hybrid beam, the row concrete-filled steel tube shear wall is formed by arranging concrete-filled steel tube prefabricated columns at intervals and wrapping the concrete-filled steel tube prefabricated columns with reinforced concrete, and a conversion end plate is embedded in the wall end of the shear wall and used for being connected with a profile steel connector of the hybrid beam; the row of concrete-filled steel tube shear walls are fixedly connected with the hybrid beams; the concrete-filled steel tube composite column is formed by wrapping a concrete-filled steel tube prefabricated column with reinforced concrete, and a conversion end plate is embedded in the side face of the composite column and used for being connected with a profile steel connector of the hybrid beam so that the concrete-filled steel tube composite column can be fixedly connected with the hybrid beam. The concrete-filled steel tube prefabricated column comprises an upper prefabricated column and a lower prefabricated column, a concave hemisphere is arranged at the bottom of the upper prefabricated column, a convex hemisphere is arranged at the top of the lower prefabricated column, and the concave hemisphere and the convex hemisphere are mutually embedded and connected and fixed by welding a steel tube at the butt joint. Dry operation is adopted, and the node connection strength is enhanced while the node connection construction feasibility is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, in particular to an assembled structure, and specifically to an assembled steel tube concrete structure. Background Art

[0002] The prefabricated steel tube concrete structure connection nodes are convenient and reliable, realizing the assembly concept of prefabricated structures. The nodes are modularly produced, with fast construction speed, simple connection, direct and reliable force transmission, and excellent seismic performance, and can be safely used in prefabricated steel tube concrete structures.

[0003] The existing technical implementation solutions are:

[0004] 1) Upper and lower connection nodes of fully prefabricated circular concrete-filled steel tube columns: Concrete-filled steel tube columns are connected by welding + local grouting or flat plate butt connection.

[0005] 2) Connection nodes between circular steel tube concrete columns and steel corbels: Circular steel tubes with smaller diameters use external reinforcement rings and steel corbels welded nodes, while circular steel tube nodes with larger diameters use internal reinforcement rings and steel corbels welded nodes.

[0006] 3) Connection node between hybrid beam steel joint and steel bar: The concrete beam body steel bars are welded to the upper and lower surfaces of the steel joint flange plate.

[0007] 4) Connection node between floor slab and column beam: the reinforcement of floor slab is not included in the beam cross section.

[0008] The prior art has the following disadvantages:

[0009] a) Upper and lower connection nodes of fully prefabricated circular steel tube concrete columns:

[0010] The contact surfaces of prefabricated components are made of post-poured concrete mortar, etc., and local grouting involves a lot of wet work on site, making it difficult to control the quality, which has a great impact on the safety of the structure.

[0011] The prefabricated components are butt-jointed with flat plates, and the surfaces are in hard contact. Due to the influence of construction and production errors, it is difficult to have dense contact, which poses a great safety hazard.

[0012] b) Connection node between circular concrete-filled steel tube column and steel corbel:

[0013] When an internal reinforcing ring plate is used for a small-diameter steel pipe, it is difficult to pour concrete inside the pipe; when an external reinforcing ring plate is used, the reinforcing ring plate is exposed, affecting the appearance of the building and resulting in poor architectural effect.

[0014] c) Connection nodes between hybrid beam steel joints and steel bars:

[0015] The concrete beam body steel bars are welded to the steel joints, and the welding quality is difficult to guarantee. Welding damages the steel bars, which are prone to brittle fracture and are not conducive to earthquake resistance. The beam body steel bars are disconnected at the flange of the steel joint, and the horizontal force of the steel bars cannot be directly transmitted to the prefabricated wall columns. The force transmission is not direct, and the earthquake resistance is poor.

[0016] d) Connection nodes between floor slab and column beam:

[0017] Under the action of earthquakes, the columns of frame structures are often destroyed while the beams are not, resulting in the collapse of the frame structure. The main reason is that the stiffness and bearing capacity of the frame beams are greatly increased due to the reinforcement of the floor slabs, and strong columns and weak beams cannot be formed. Summary of the invention

[0018] In view of the deficiencies in the prior art, the present invention proposes an assembled steel tube concrete structure, which adopts dry operation to ensure the feasibility of node connection construction while enhancing the node connection strength.

[0019] The technical solution of the present invention is as follows:

[0020] An assembled steel tube concrete structure, comprising a steel tube concrete shear wall, a steel tube concrete composite column and a hybrid beam;

[0021] The row of steel tube concrete shear walls is formed by prefabricated steel tube concrete columns arranged at intervals and covered with reinforced concrete. The wall ends of the shear walls are embedded with conversion end plates for connecting with the steel joints of the hybrid beams to achieve the connection and fixation of the row of steel tube concrete shear walls with the hybrid beams.

[0022] The steel tube concrete composite column is formed by a steel tube concrete prefabricated column wrapped with reinforced concrete, and a conversion end plate is embedded in the side of the composite column, which is used to connect with the steel joint of the hybrid beam to achieve the connection and fixation of the steel tube concrete composite column and the hybrid beam; and

[0023] The steel tube concrete prefabricated column comprises an upper prefabricated column and a lower prefabricated column. The bottom of the upper prefabricated column is provided with an inner concave hemisphere, and the top of the lower prefabricated column is provided with an outer convex hemisphere. The inner concave hemisphere and the outer convex hemisphere are embedded in each other and are connected and fixed by welding steel pipes at the joint.

[0024] In some feasible embodiments, the row of steel tube concrete shear walls also include vertical ring plates, and two groups of the vertical ring plates are clamped on two prefabricated steel tube concrete columns at the ends of the row of steel tube concrete shear walls by at least one vertical ring plate at the heights of the upper and lower flange plates of the steel joints corresponding to the hybrid beams, and both ends of at least one of the vertical ring plates are welded and fixed to the conversion end plates.

[0025] In some feasible embodiments, the two groups of vertical ring plates include a first vertical ring plate and a second vertical ring plate, the first vertical ring plate is clamped on the first precast steel tube concrete column at the end of the row of steel tube concrete shear wall and both ends are welded and fixed to the conversion end plate, the second vertical ring plate is clamped on the second precast steel tube concrete column at the end of the row of steel tube concrete shear wall and the first vertical ring plate and both ends are welded and fixed to the conversion end plate.

[0026] In some feasible embodiments, the row of steel tube concrete shear walls further includes a reinforcing web, and two of the reinforcing webs are welded and connected between the first prefabricated steel tube concrete column at the end of the row of steel tube concrete shear walls and the conversion end plate.

[0027] In some feasible embodiments, the steel tube concrete composite column also includes a vertical ring plate, and two groups of the vertical ring plates are clamped on the steel tube concrete precast column by one vertical ring plate at the height of the upper and lower flange plates of the steel joints corresponding to the hybrid beam, and both ends of one vertical ring plate are welded and fixed to the conversion end plate on one side; and / or, the two groups of the vertical ring plates are enclosed on the steel tube concrete precast column by two vertical ring plates at the height of the upper and lower flange plates of the steel joints corresponding to the hybrid beam, and the two ends of the two vertical ring plates are respectively welded and fixed to the conversion end plates on the opposite sides.

[0028] In some feasible embodiments, the steel tube concrete composite column further includes a reinforcing web, and a piece of the reinforcing web is welded and connected between the steel tube concrete prefabricated column and the conversion end plate.

[0029] In some achievable embodiments, the outer edge of the concave hemisphere is welded to the inner wall of the upper prefabricated column to form a seal;

[0030] And / or, a top plate is arranged on the top of the lower prefabricated column, and the convex hemisphere is arranged on the top plate; and the bottom of the upper prefabricated column is welded and fixed to the top plate.

[0031] In some achievable embodiments, the hybrid beam is composed of a reinforced concrete beam body and a steel joint; wherein

[0032] The reinforced concrete beam body is arranged with top steel bars, bottom steel bars and waist bars;

[0033] The steel joint adopts an H-shaped steel beam, and the conversion end plate of the row of steel tube concrete shear walls and the conversion end plate of the steel tube concrete composite column are connected to the web of the H-shaped steel beam.

[0034] In some feasible embodiments, a plurality of T-shaped shear keys are welded along the height of the web of the H-shaped steel beam, and the T-shaped shear keys correspond one-to-one to the waist reinforcement of the reinforced concrete beam body and are welded and connected.

[0035] In some feasible embodiments, the ends of the top and bottom steel bars of the reinforced concrete beam body are threaded, the upper and lower flange plates of the H-shaped steel beam of the steel joint are provided with internal threaded holes, and the top and bottom steel bars are inserted into the internal threaded holes of the upper and lower flange plates of the H-shaped steel beam for threaded connection.

[0036] In some feasible embodiments, the internal threaded hole passes through the upper and lower flange plates, the threaded steel bars pass through the upper and lower flange plates, and are welded to the conversion end plates on the row of steel tube concrete shear walls and steel tube concrete composite columns.

[0037] The beneficial effects of the present invention compared with the prior art are as follows: the present invention provides an assembled steel tube concrete structure, each connection node has the following advantages:

[0038] For the vertical connection nodes of precast steel tube concrete columns: (1) The setting of hemispherical nodes can ensure that the precast columns can be moved and rotated up and down, left and right, front and back, under the premise of reliable vertical force transmission, which is convenient for adjusting construction errors; (2) The precast columns are fully prefabricated, and the node connections are constructed by dry method, which is convenient for on-site construction and easy to control construction quality; (3) When welding steel tubes, the welding heat is transferred to the top plate and hemisphere, which can protect the concrete from welding damage.

[0039] For the transverse connection nodes of steel tube concrete shear walls, steel tube concrete composite columns and hybrid beams: (1) By adopting vertical ring plates, and connecting the vertical ring plates with branch pipes and beams, the force transmission is direct, the thickness of the vertical ring plates is reduced, and the processing is convenient. The vertical ring plates are close to the wall thickness of the steel tube, which is convenient for welding; the vertical ring plates are continuously arranged around the round steel tube, and the tension of the vertical ring plates is directly transmitted to the back of the round steel tube and converted into pressure on the round steel tube. The vertical ring plates can be simply welded to the round steel tube to avoid welding of ultra-thick vertical plates and steel tubes and welding the steel tubes through; (2) Compared with the nodes with outer reinforced ring plates of ordinary round steel tubes, the vertical ring plates are arranged vertically, which saves node space, avoids the problem of exposed reinforced ring plates, has good construction effects, and is convenient for pouring concrete in the node area; compared with the nodes with inner ring plates of ordinary round steel tubes, the vertical ring plates are arranged around the outer side of the round steel tube, and the round steel tube is vertically continuous and connected. Compared with the inner ring plates, the integrity is maintained, and concrete pouring is easy.

[0040] For the connection node between the steel joint and the concrete beam body: (1) The upper and lower longitudinal bars are integrated with the upper and lower flange plates, which transmit force directly, reliably and continuously, with controllable quality and low cost, avoiding the problem of difficult-to-control quality of lap welding between steel bars and steel plates; (2) The threaded steel bars pass through the flange steel plates and are welded to the wall column conversion steel plates, which have high redundancy and convenient construction; (3) The steel bars are threaded to avoid damage to the steel bars during welding and ensure the seismic ductility of the steel bars; the space requirements of the weldable steel sleeves are avoided, and the weldable sleeves are integrated into simple steel plates.

[0041] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0043] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0044] Figure 1 It is a schematic diagram of the transverse connection node between the row of steel tube concrete shear walls and the hybrid beams in some embodiments of the present invention;

[0045] Figure 1A for Figure 1 Schematic diagram of the cross section 1a-1a (line shaped);

[0046] Figure 1B for Figure 1 Schematic diagram of the section 1a-1a (T-shaped);

[0047] Figure 2 A schematic diagram of a transverse connection node between a steel tube concrete composite column and a hybrid beam according to some embodiments of the present invention;

[0048] Figure 2A for Figure 2 Schematic diagram of the section 2a-2a (four beam nodes);

[0049] Figure 2B for Figure 2 Schematic diagram of the section 2a-2a (three beam nodes);

[0050] Figure 2C for Figure 2 Schematic diagram of the section 2a-2a (two beam nodes in the same shape);

[0051] Figure 2D for Figure 2 Schematic diagram of the section 2a-2a (L-shaped node of two beams);

[0052] Figure 2E for Figure 2 Schematic diagram of the section 2a-2a (a beam node);

[0053] Figure 3 A schematic diagram of a vertical connection node of a precast steel tube concrete column in some embodiments of the present invention;

[0054] Figure 3A for Figure 3 Schematic diagram of the state of the precast concrete-filled steel tube column before connection;

[0055] Figure 4 Schematic diagram of connection nodes between steel joints and reinforced concrete beams in some embodiments of the present invention;

[0056] Figure 4A for Figure 4 Schematic diagram of thread cutting in medium steel bar;

[0057] Figure 4B for Figure 4 Schematic diagram of the internal threaded hole in the middle flange steel plate;

[0058] Figure 4C for Figure 4 Schematic diagram of the cross section 4a-4a.

[0059] Markings in the figure:

[0060] A row of steel tube concrete shear walls 1, steel tube concrete composite columns 2, hybrid beams 3, reinforced concrete beam bodies 31, top steel bars 311, bottom steel bars 312, waist bars 313, steel joints 32, T-shaped shear keys 321, internal threaded holes 322, steel tube concrete precast columns 4, upper precast columns 41, lower precast columns 42, inner concave hemispheres 43, outer convex hemispheres 44, top plates 45, conversion end plates 5, first vertical ring plates 61, second vertical ring plates 62, and reinforced web plates 7.

[0061] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0065] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device, component or structure must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0067] The present invention relates to an assembled concrete-filled steel tube structure, in particular to connection nodes involved therein, which include transverse connection nodes between concrete-filled steel tube shear walls and hybrid beams, transverse connection nodes between concrete-filled steel tube composite columns and hybrid beams, and vertical connection nodes between concrete-filled steel tube prefabricated columns.

[0068] The implementation of the present invention is described in detail below in conjunction with preferred embodiments.

[0069] like Figure 1-4, showing an assembled steel tube concrete structure provided by an embodiment of the present invention, including a steel tube concrete shear wall 1, a steel tube concrete composite column 2 and a hybrid beam 3. The components are connected and fixed by corresponding connection nodes to form an assembled steel tube concrete structure. The connection nodes include a transverse connection node between the steel tube concrete shear wall and the hybrid beam, a transverse connection node between the steel tube concrete composite column and the hybrid beam, and a vertical connection node between the steel tube concrete precast column.

[0070] See also Figure 1 , 1A 1B, for the row of steel tube concrete shear wall 1, it is formed by prefabricated steel tube concrete columns 4 arranged at intervals and covered with reinforced concrete. The wall end of the shear wall is embedded with a conversion end plate 5, which is used to connect with the steel joint 32 of the hybrid beam 3 to achieve the connection and fixation of the row of steel tube concrete shear wall 1 and the hybrid beam 3.

[0071] The steel tube concrete precast column 4 adopts round steel tubes, which are arranged at predetermined intervals, and vertical and horizontal force-bearing steel bars and horizontal tension bars are tied on the periphery, and concrete is poured, which are all prefabricated in the factory. The concrete in the round steel tube can be poured in advance in the factory or on site.

[0072] The conversion end plate 5 is arranged on the side of the wall end of the shear wall, embedded in the concrete of the wall end, and its outer surface is flush with the concrete of the side of the shear wall, which does not affect the overall configuration of the shear wall. The width of the conversion end plate 5 is not less than the width of the hybrid beam 3, and the height is not less than the height of the hybrid beam 3, so as to connect the hybrid beam 3 and provide sufficient bearing capacity.

[0073] See also Figure 2 , 2A , 2B, 2C, 2D, 2E, for the steel tube concrete composite column 2, it is formed by a steel tube concrete prefabricated column 4 wrapped with reinforced concrete, and a conversion end plate 5 is embedded in the side of the composite column to be connected to the steel joint 32 of the hybrid beam 3 to achieve the connection and fixation of the steel tube concrete composite column 2 and the hybrid beam 3.

[0074] The steel tube concrete precast column 4 here has the same structure as the steel tube concrete precast column 4 in the row of steel tube concrete shear walls 1 .

[0075] The conversion end plate 5 is arranged on the side of the composite column and embedded in the composite column concrete. Its outer surface is flush with the concrete surface of the composite column and does not affect the overall configuration of the composite column. Similarly, the width of the conversion end plate 5 is not less than the width of the hybrid beam 3, and the height is not less than the height of the hybrid beam 3, so as to connect the hybrid beam 3 and provide sufficient bearing capacity.

[0076] See also Figure 3 , 3AThe steel tube concrete precast column 4 includes an upper precast column 41 and a lower precast column 42. The bottom of the upper precast column 41 is provided with an inner concave hemisphere 43, and the top of the lower precast column 42 is provided with an outer convex hemisphere 44. The inner concave hemisphere 43 and the outer convex hemisphere 44 are mutually embedded and connected and fixed by welding a steel pipe at the joint. The outer convex hemisphere 44 can be a solid hemisphere or a hollow hemisphere.

[0077] The curvature radius of the concave hemisphere 43 and the convex hemisphere 44 must be consistent when processed in the factory; when installing the prefabricated column, the convex hemisphere 44 serves as a movable hemisphere. When adjusting the installation error of the prefabricated column, the hemispheres can fit tightly to ensure the continuity of the vertical pressure transmission of the concrete in the steel pipe column.

[0078] During specific processing and manufacturing, the outer edge of the concave hemisphere 43 is welded to the inner wall of the upper prefabricated column 41 to form a seal, so that there will be no leakage when pouring concrete in the pipe.

[0079] In a preferred embodiment, a top plate 45 is provided on the top of the lower prefabricated column 42, and the convex hemisphere 44 is welded and fixed on the top plate 45; the size of the top plate 45 is not smaller than the size of the steel pipe of the lower prefabricated column 42, that is, the top plate 45 completely covers and closes the steel pipe of the lower prefabricated column 42, and after the upper and lower prefabricated columns are connected, the bottom of the upper prefabricated column 41 is welded and fixed to the top plate 45.

[0080] During construction, the upper precast column 41 is hoisted on the top of the convex hemisphere 44, and the horizontal position and rotation angle of the upper precast column 41 are adjusted. After the adjustment is completed, the round steel pipe of the upper precast column 41 is welded to the top plate 45. Subsequently, the precast column reinforcement is welded, and concrete is poured in the node area. The upper precast column 41 and the lower precast column 41 are welded to the top plate 45 together to ensure the continuity of the vertical tension, pressure and shear force transmission of the steel pipe column.

[0081] In addition, the outer longitudinal reinforcement of the steel tube concrete precast column 4 is overlapped and welded, and the length of the post-cast section of the precast component splicing node can be controlled between 200 and 300 mm, thereby improving the prefabrication rate and reducing the workload of on-site construction.

[0082] The vertical connection node of the prefabricated steel tube concrete column provided by the present invention has the following advantages:

[0083] (1) During construction, the movable hemisphere can move freely in the concave hemisphere at the bottom of the upper prefabricated column to ensure vertical force transmission; the upper prefabricated column can rotate freely on the movable hemisphere to adjust the vertical error. A thin plate with a thickness of 1-5 mm can be set under the hemisphere to facilitate the adjustment of the height of the movable hemisphere. By setting the hemisphere node, it can be ensured that the prefabricated column can move and rotate up and down, left and right, front and back under the premise of reliable vertical force transmission, which is convenient for adjusting construction errors.

[0084] (2) Prefabricated columns are fully prefabricated and node connections are constructed using the dry method, which makes on-site construction convenient and the construction quality easy to control.

[0085] (3) When welding steel pipes, the welding heat is transferred to the steel plate (top plate) and hemisphere, which can protect the concrete from welding damage.

[0086] See also Figure 1 , 1A 1B, in one embodiment, the row of steel tube concrete shear wall 1 also includes a vertical ring plate 6, the so-called vertical ring plate is a steel plate arranged vertically around the steel tube, and the vertical ring plate can be bent and curled.

[0087] Two groups of vertical ring plates 6 are arranged. Since the tensile pressure of the upper and lower flange plates of the steel joint is transmitted to the vertical ring plates 6 through the conversion end plate 5, the two groups of vertical ring plates 6 are arranged at the height of the upper and lower flange plates of the steel joint 32 of the corresponding hybrid beam 3, and each group of vertical ring plates 6 is clamped on the two steel tube concrete precast columns 4 at the ends of the row of steel tube concrete shear walls 1 by at least one vertical ring plate 6. The so-called clamping means that the vertical ring plate 6 goes around the steel tube concrete precast column 4 in an N shape and then both ends are welded and fixed to the conversion end plate 5.

[0088] More specifically, for the row of steel tube concrete shear wall 1, the vertical ring plate adopts a branch pipe connection, which is respectively connected to different steel pipes near and far. As shown in 1A, the vertical ring plate 6 is provided with two pieces, including a first vertical ring plate 61 and a second vertical ring plate 62, and the thickness of the vertical ring plate is similar to the wall thickness of the steel pipe; the first vertical ring plate 61 is hooped on the first steel tube concrete precast column 4 at the end of the row of steel tube concrete shear wall 1, that is, the first steel tube concrete precast column 4 near the end of the row of steel tube concrete shear wall 1 is hooped, the first steel tube concrete precast column 4 is enclosed and welded, the second vertical ring plate 62 is hooped from the second steel tube concrete precast column 4 far from the end of the row of steel tube concrete shear wall 1, and the second steel tube concrete precast column 4 and the first vertical ring plate 61 are enclosed and welded at the same time, and both ends of the first vertical ring plate 61 and the second vertical ring plate 62 are welded and fixed to the conversion end plate 5.

[0089] See also Figure 1 , 1A The row of steel tube concrete shear wall 1 also includes a reinforcing web 7. In the figure, two reinforcing webs 7 are arranged between the first steel tube concrete prefabricated column 4 and the conversion end plate 5 at the end of the row of steel tube concrete shear wall 1, and both ends are welded and connected. With the help of the reinforcing web, the vertical shear force of the hybrid beam is transmitted to the steel tube in the shear wall.

[0090] Continue to see Figure 2 , 2ASimilar to the row of steel tube concrete shear walls 1, the steel tube concrete composite column 2 also includes a vertical ring plate 6, the thickness of which is similar to the wall thickness of the steel tube. Two sets of vertical ring plates 6 are arranged at the height of the upper and lower flange plates of the corresponding steel joint 32 of the hybrid beam 3, and are all clamped on the steel tube concrete prefabricated column 4 by a vertical ring plate 6 and welded. For the steel tube concrete composite column 2, the vertical ring plates are connected by split beams, and different vertical ring plates are directly connected to the central circular steel tube. Here, the vertical ring plates 6 have different arrangements according to the hybrid beams 3 connected around the steel tube concrete composite column 2:

[0091] like Figure 2A The four sides of the steel tube concrete composite column 2 are connected to the hybrid beam 3. The four sides of the steel tube concrete composite column 2 are provided with conversion end plates 5. Four vertical ring plates 6 are grouped in pairs. The two vertical ring plates 6 respectively enclose the steel tube concrete prefabricated column 4 from opposite sides, and the two ends of each group of two vertical ring plates 6 are respectively welded and fixed to the conversion end plates 5 on the opposite side.

[0092] like Figure 2B The three sides of the steel tube concrete composite column 2 are connected to the hybrid beam 3, and the three sides of the steel tube concrete composite column 2 are provided with conversion end plates 5, wherein two vertical ring plates 6 respectively enclose the steel tube concrete precast column 4 from opposite sides, and the two ends of the two vertical ring plates 6 are respectively welded and fixed to the conversion end plates 5 on the opposite sides, and the other vertical ring plate 6 bypasses the steel tube concrete precast column 4 in an N shape, and the two ends are respectively welded and fixed to the conversion end plates 5 on the corresponding sides.

[0093] like Figure 2C The steel tube concrete composite column 2 is connected to the hybrid beam 3 on two opposite sides, and conversion end plates 5 are arranged on two opposite sides of the steel tube concrete composite column 2. Then the two vertical ring plates 6 respectively enclose the steel tube concrete prefabricated column 4 from two opposite sides, and the two ends of the two vertical ring plates 6 are respectively welded and fixed to the conversion end plates 5 on the opposite sides.

[0094] like Figure 2D The adjacent two sides of the steel tube concrete composite column 2 are connected to the hybrid beam 3, and the adjacent two sides of the steel tube concrete composite column 2 are provided with conversion end plates 5. Then the two vertical ring plates 6 are bypassed around the steel tube concrete prefabricated column 4 in an N shape, and the two ends are respectively welded and fixed to the conversion end plates 5 on the corresponding sides.

[0095] like Figure 2E The steel tube concrete composite column 2 is connected to the hybrid beam 3 on only one side, and a conversion end plate 5 is provided on one side of the steel tube concrete composite column 2. Then, a vertical ring plate 6 is passed around the steel tube concrete prefabricated column 4 in an N shape, and its two ends are respectively welded and fixed to the conversion end plate 5.

[0096] Similar to the row of steel tube concrete shear walls 1, the steel tube concrete composite column 2 also includes a reinforcing web 7. A reinforcing web 7 is arranged between the steel tube concrete precast column 4 and the conversion end plate 5, and is welded and fixed to the center of the steel tube concrete precast column 4 and the conversion end plate 5.

[0097] It should be noted that the thickness of the reinforced web is 10mm, and the wall thickness of the steel pipe in the shear wall is only 4-5mm. The two do not match, so two reinforced webs are designed in the shear wall, both with a thickness of 6mm, so that they match the steel pipe in the shear wall; the wall thickness of the steel pipe in the composite column is 10mm, which matches the 10mm thickness of the reinforced web, so only one piece is required.

[0098] The present invention adopts a vertical ring plate to connect the steel pipe and the conversion end plate. This connection method has direct force transmission and is convenient for processing. The vertical ring plate is changed from a traditional thick plate to a plurality of single-layer thin plates. The thin plates are similar in thickness to the steel pipe wall thickness and are easy to weld. The vertical ring plates are continuously arranged around the circular steel pipe. The tension of the vertical ring plates is directly transmitted to the back of the circular steel pipe and converted into pressure on the circular steel pipe. The vertical ring plate can be simply welded to the circular steel pipe to avoid the steel pipe being welded through when the ultra-thick vertical ring plate is welded to the steel pipe.

[0099] The transverse connection node of the row of steel tube concrete shear walls, steel tube concrete composite columns and hybrid beams provided by the present invention has the following advantages:

[0100] (1) The vertical ring plate is connected by pipes and beams, which directly transmits force, reduces the thickness of the vertical ring plate, facilitates processing, and is close to the wall thickness of the steel pipe, which is convenient for welding; the vertical ring plate is continuously arranged around the round steel pipe, and the tension of the vertical ring plate is directly transmitted to the back of the round steel pipe and converted into pressure on the round steel pipe. The vertical ring plate can be simply welded to the round steel pipe to avoid welding of ultra-thick vertical plates and steel pipes, and the steel pipes are welded through.

[0101] (2) Through design calculation, it is required that the bearing capacity and stiffness of the vertical ring plate should not be lower than that of the ordinary circular steel tube reinforcement ring. Compared with the node of the ordinary circular steel tube external reinforcement ring plate, the vertical ring plate is set vertically, which saves the node space, avoids the problem of exposed reinforcement ring plate, has good construction effect, and is convenient for pouring concrete in the node area; compared with the node of the ordinary circular steel tube inner ring plate, the vertical ring plate is set around the outer side of the circular steel tube, and the circular steel tube is vertically continuous. Compared with the inner ring plate, it maintains integrity and is easy to pour concrete.

[0102] See also Figure 4 , 4A , 4B, 4C, the present invention provides a preferred hybrid beam structure, the hybrid beam 3 includes a reinforced concrete beam body 31 and a steel joint 32.

[0103] The reinforced concrete beam body 31 is a prefabricated reinforced concrete structure, which is arranged with top steel bars 311, bottom steel bars 312, waist bars 313, and stirrups, and is formed by pouring concrete.

[0104] The length of the steel joint 32 is 100-200 mm, and an H-shaped steel beam is used. The H-shaped steel beam has upper and lower flange plates and a web. The conversion end plates 5 of the steel tube concrete shear wall 1 and the conversion end plates 5 of the steel tube concrete composite column 2 can be welded with connecting steel plates, for example, two connecting steel plates are symmetrically welded, and bolt holes are preset on the steel plates, which are connected and fixed with the web of the H-shaped steel beam by means of a plurality of bolts.

[0105] In a preferred embodiment, if Figure 4C As shown, a plurality of T-shaped shear keys 321 are welded along the height of the web of the H-shaped steel beam, the web of the T-shaped shear key 321 is perpendicular to the web of the H-shaped steel beam and is welded together, the flange of the T-shaped shear key 321 faces outward, corresponds one-to-one with the waist reinforcement 313 of the reinforced concrete beam body 31 and is welded together, and the precast concrete is connected to the steel joint through the T-shaped shear key.

[0106] In a preferred embodiment, if Figure 4 , 4A As shown in 4B, the upper and lower flange plates of the steel joint 32 correspond to the top steel bars 311 and the bottom steel bars 312 of the reinforced concrete beam body 31, and the ends of the top steel bars 311 and the bottom steel bars 312 of the reinforced concrete beam body 31 are threaded, and the upper and lower flange plates of the H-shaped steel beam of the steel joint 32 are provided with internal threaded holes 322, and the top steel bars 311 and the bottom steel bars 312 are inserted into the internal threaded holes 322 of the upper and lower flange plates of the H-shaped steel beam and connected by threads.

[0107] More preferably, the internal threaded holes 322 opened on the upper and lower flange plates penetrate the upper and lower flange plates, and the threaded steel bars penetrate the upper and lower flange plates and are welded to the conversion end plates 5 on the shear walls and composite columns.

[0108] The connection node between the steel joint and the concrete beam provided by the present invention has the following advantages:

[0109] (1) The upper and lower longitudinal bars are integrated with the upper and lower flange plates, which ensures direct, reliable and continuous force transmission, controllable quality and low cost, avoiding the problem of difficult-to-control quality of lap welding between steel bars and steel plates;

[0110] (2) The threaded steel bars penetrate the flange steel plate and are welded to the wall column conversion steel plate, which has high redundancy and convenient construction;

[0111] (3) The longitudinal reinforcement of the hybrid beam is connected in the factory, avoiding the on-site reinforcement binding construction work of ordinary composite beams. No reinforcement workers are required on the hybrid beam construction site;

[0112] (4) The node area is covered with steel mesh and cast-in-place concrete, and the node has excellent anti-corrosion and fire-proof performance;

[0113] (5) Threading the steel bars can avoid damage to the steel bars caused by welding and ensure the seismic ductility of the steel bars; the space requirements of the weldable steel sleeves can be avoided and the weldable sleeves can be integrated into a simple steel plate.

[0114] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An assembled steel tube concrete structure, comprising a steel tube concrete shear wall, a steel tube concrete composite column and a hybrid beam, characterized in that: The row of steel tube concrete shear walls is formed by prefabricated steel tube concrete columns arranged at intervals and covered with reinforced concrete. The wall ends of the shear walls are embedded with conversion end plates for connecting with the steel joints of the hybrid beams to achieve the connection and fixation of the row of steel tube concrete shear walls with the hybrid beams. The steel tube concrete composite column is formed by a steel tube concrete prefabricated column wrapped with reinforced concrete, and a conversion end plate is embedded in the side of the composite column, which is used to connect with the steel joint of the hybrid beam to achieve the connection and fixation of the steel tube concrete composite column and the hybrid beam; and The steel tube concrete prefabricated column comprises an upper prefabricated column and a lower prefabricated column. The bottom of the upper prefabricated column is provided with an inner concave hemisphere, and the top of the lower prefabricated column is provided with an outer convex hemisphere. The inner concave hemisphere and the outer convex hemisphere are embedded in each other and are connected and fixed by welding steel pipes at the joint.

2. The assembled steel tube concrete structure according to claim 1 is characterized in that: The row of steel tube concrete shear walls also includes vertical ring plates. Two groups of the vertical ring plates are clamped on two prefabricated steel tube concrete columns at the ends of the row of steel tube concrete shear walls by at least one vertical ring plate at the height of the upper and lower flange plates of the steel joints corresponding to the hybrid beams, and both ends of at least one vertical ring plate are welded and fixed to the conversion end plates.

3. The assembled steel tube concrete structure according to claim 2 is characterized in that: The two groups of vertical ring plates each include a first vertical ring plate and a second vertical ring plate. The first vertical ring plate is clamped on the first prefabricated steel tube concrete column at the end of the row of steel tube concrete shear walls and both ends are welded and fixed to the conversion end plate. The second vertical ring plate is clamped on the second prefabricated steel tube concrete column at the end of the row of steel tube concrete shear walls and the first vertical ring plate and both ends are welded and fixed to the conversion end plate.

4. The assembled steel tube concrete structure according to claim 2 is characterized in that: The row of steel tube concrete shear walls also includes a reinforcing web, and two of the reinforcing webs are welded and connected between the first prefabricated steel tube concrete column at the end of the row of steel tube concrete shear walls and the conversion end plate.

5. The assembled steel tube concrete structure according to claim 1 is characterized in that: The steel tube concrete composite column also includes a vertical ring plate, and two groups of the vertical ring plates are each clamped on the steel tube concrete precast column by one vertical ring plate at the height of the upper and lower flange plates of the steel joints corresponding to the hybrid beam, and both ends of one vertical ring plate are welded and fixed to the conversion end plate on one side; and / or, the two groups of the vertical ring plates are each enclosed on the steel tube concrete precast column by two vertical ring plates at the height of the upper and lower flange plates of the steel joints corresponding to the hybrid beam, and both ends of the two vertical ring plates are respectively welded and fixed to the conversion end plates on the opposite sides.

6. The assembled steel tube concrete structure according to claim 5, characterized in that: The steel tube concrete composite column also includes a reinforcing web, and a piece of the reinforcing web is welded and connected between the steel tube concrete prefabricated column and the conversion end plate.

7. The assembled steel tube concrete structure according to claim 1, characterized in that: The outer edge of the concave hemisphere is welded to the inner wall of the upper prefabricated column to form a seal; And / or, a top plate is arranged on the top of the lower prefabricated column, and the convex hemisphere is arranged on the top plate; and the bottom of the upper prefabricated column is welded and fixed to the top plate.

8. The assembled steel tube concrete structure according to any one of claims 1 to 7, characterized in that: The hybrid beam is composed of a reinforced concrete beam body and a steel joint; The reinforced concrete beam body is arranged with top steel bars, bottom steel bars and waist bars; The steel joint adopts an H-shaped steel beam, and the conversion end plate of the row of steel tube concrete shear walls and the conversion end plate of the steel tube concrete composite column are connected to the web of the H-shaped steel beam.

9. The assembled steel tube concrete structure according to claim 8, characterized in that: A plurality of T-shaped shear keys are welded along the height of the web of the H-shaped steel beam, and the T-shaped shear keys correspond to the waist reinforcement of the reinforced concrete beam body one by one and are welded and connected.

10. The assembled steel tube concrete structure according to claim 8, characterized in that: The top and bottom steel bars of the reinforced concrete beam are threaded, the upper and lower flange plates of the H-shaped steel beam of the steel joint are provided with internal threaded holes, and the top and bottom steel bars are inserted into the internal threaded holes of the upper and lower flange plates of the H-shaped steel beam for threaded connection; Preferably, the internal threaded hole passes through the upper and lower flange plates, the threaded steel bars pass through the upper and lower flange plates, and are welded to the conversion end plates on the row of steel tube concrete shear walls and steel tube concrete composite columns.

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