Fabricated hot-rolled H-shaped steel beam column and connecting method

Abstract

The invention discloses a fabricated hot-rolled H-shaped steel beam column and a connecting method, the method is characterized in that hot-rolled H-shaped steel is used and welded side by side to form a solid-web type or lattice type combined column or shear wall, the formed hot-rolled H-shaped steel is welded through first-stage penetration welding to form a column core, and concrete is poured into the column core to form column core concrete. Meanwhile, pins are welded to the outer sides of flanges on the two sides of the hot-rolled H-shaped steel, steel wire meshes are bound, formwork plates serve as outer side formworks, and fiber cement mortar is directly poured to serve as inner and outer fireproof layers of the hot-rolled H-shaped steel. In addition, the structural stability can be enhanced by welding an upper stiffening plate, a vertical connecting plate, a lower stiffening plate and other components at one end or two ends of the hot-rolled H-shaped steel. According to the fabricated hot-rolled H-shaped steel beam column and the connecting method, the anti-seismic property and durability of a steel structure building can be improved, the construction difficulty and cost can be reduced, the construction efficiency is improved, and the requirements of modern building industrialization are met.

Description

Technical Field

[0001] The invention relates to the technical field of civil steel structure engineering, and in particular to an assembled hot-rolled H-shaped steel beam column and a connection method. Background Art

[0002] In the process of steel structure construction, traditional special-shaped columns are difficult to construct, costly or inefficient to design due to their complex structure, high steel content or the lack of relevant module parameters in existing design software, which cannot demonstrate the advantages of fast, efficient and low-cost assembly, and is not compatible with the requirements of new building industrialization. Therefore, an assembled hot-rolled H-shaped steel beam-column and connection method are designed, which uses formed hot-rolled H-shaped steel to weld into steel composite columns or short-leg shear walls, and then welds hot-rolled H-shaped steel beams on the side to form a new frame structure or frame-shear system to improve the rapid and efficient construction of steel structure civil construction. Summary of the invention

[0003] The purpose of the present invention is to use hot-rolled H-shaped steel and weld them shoulder to shoulder to form a solid or lattice composite column or shear wall, thereby improving the structural bearing capacity and lateral stiffness, and realizing fast and efficient construction, and to propose an assembled hot-rolled H-shaped steel beam-column and a connection method.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An assembled hot-rolled H-shaped steel beam column, characterized in that it comprises hot-rolled H-shaped steel, full-penetration welding, side connecting plates, column core concrete, pins, and steel mesh;

[0006] The hot-rolled H-beam comprises hot-rolled H-beam 1 and hot-rolled H-beam 2;

[0007] The hot-rolled H-beam 1 is arranged longitudinally, and the hot-rolled H-beam 2 is arranged transversely. The hot-rolled H-beam 1 is connected to the upper and lower flanges of the hot-rolled H-beam 2, and the connection is welded by first-level full-penetration welding. The hot-rolled H-beam 1 and the hot-rolled H-beam 2 are welded to form a column core, and concrete is poured in the column core to form column core concrete;

[0008] On the outside of the upper and lower flanges of the hot-rolled H-beam, pins are welded at a certain interval, wire mesh is tied to the pins, and the formwork plate is used as the outer formwork to directly pour fiber cement mortar as the inner and outer fireproof layers of the hot-rolled H-beam;

[0009] Preferably, the core concrete of the column can be filled with ordinary concrete or foamed concrete according to the size of the upper load, so as to improve the structural bearing capacity and lateral stiffness;

[0010] On the outside of the upper and lower flanges of the hot-rolled H-beam II, pins are welded at a certain interval, wire mesh is tied to the pins, and the formwork plate is used as the outer formwork to directly pour fiber cement mortar as the inner and outer fireproof layers of the hot-rolled H-beam I;

[0011] Both sides of the hot-rolled H-beam 1 or the hot-rolled H-beam 2 are painted with fire-proof and anti-corrosion coatings; or positioning pins are welded on the outside, wire mesh is hung, and fiber cement mortar is cast in the formwork as a fire-proof wrapping layer; the cavity between the upper and lower ends of the hot-rolled H-beam 1 or the hot-rolled H-beam 2 is filled with cement mortar or foam concrete.

[0012] Preferably, it also includes a side connecting plate, and the side connecting plate is used to weld the upper and lower flange connections of the hot-rolled H-shaped steel 1 and the hot-rolled H-shaped steel 2.

[0013] Preferably, it also includes an upper stiffening plate, a vertical connecting plate, a lower stiffening plate, and beam end stiffening ribs;

[0014] The hot-rolled H-beam is distributed between the outwardly extending flanges on one side of the end of the hot-rolled H-beam 1 or the hot-rolled H-beam 2, and the two are integrated using a double-sided welding process. At the same time, an "I-beam" base formed by an upper stiffening plate, a vertical connecting plate, and a lower stiffening plate is arranged below the bottom plate of the hot-rolled H-beam. The sides of the upper stiffening plate, the vertical connecting plate, and the lower stiffening plate are respectively welded to the hot-rolled H-beam 2 or the hot-rolled H-beam 1.

[0015] Preferably, a hot-rolled H-beam beam is welded on the side of the hot-rolled H-beam 1 or the hot-rolled H-beam 2 to form a short-limb shear wall;

[0016] The hot-rolled H-shaped steel beam is welded between the upper and lower flanges of the side of the hot-rolled H-shaped steel. The upper stiffening plate, the vertical connecting plate and the lower stiffening plate are welded closely to the bottom of the beam below the end of the hot-rolled H-shaped steel beam.

[0017] The upper stiffening plate is a steel plate of a certain thickness, located below the head of the hot-rolled H-shaped steel beam, and is welded to the upper flange, lower flange, and web of the hot-rolled H-shaped steel beam using fillet welds on both sides, and a vertical connecting plate is welded at the middle position below;

[0018] The vertical connecting plate is a steel plate of a certain thickness, the upper end of which is connected to the corner welds on both sides of the upper stiffening plate, and the lower end is connected to the corner welds on both sides of the lower stiffening plate;

[0019] Preferably, the lower stiffening plate is a steel plate of a certain thickness, located below the head of the hot-rolled H-shaped steel beam, and is welded to the upper flange, lower flange, and web of the hot-rolled H-shaped steel beam by using fillet welds on both sides;

[0020] The beam end stiffening ribs are welded in two passes at a certain interval between the upper and lower flanges of the end of the hot-rolled H-shaped steel beam to enhance the structural bearing capacity of the beam-column connection.

[0021] Preferably, the hot-rolled H-shaped steel is produced by a steel mill and transported to a standardized steel component processing plant or directly processed in the steel mill.

[0022] The hot-rolled H-shaped steel is produced by a steel plant, and can be welded with a single or multiple hot-rolled H-shaped steels of the same specifications and sizes in a steel plant or an on-site automated workshop through flange butt welding, or welded with steel plates on the inside and outside to form special-shaped columns or short-leg shear walls. It has good ductility and can jointly bear vertical and horizontal loads.

[0023] Preferably, the column core is filled with ordinary concrete or foamed concrete to form column core concrete, and hoop-constrained core concrete technology is used to improve the vertical bearing capacity of the column or wall.

[0024] Preferably, the space between the outwardly extending flanges on one side of the end of the hot-rolled H-shaped steel is filled with cement mortar or fireproof rock wool.

[0025] Preferably, the two sides of the hot-rolled H-shaped steel can be painted with fireproof materials and anti-corrosion materials to meet the requirements of the fire resistance index of steel structures. At the same time, pins are welded, wire mesh is hung, and fiber cement mortar is cast in the formwork to form a fireproof layer, thereby improving the fire resistance and durability of the structure.

[0026] A method for connecting assembled hot-rolled H-shaped steel beams and columns, comprising the following steps in order:

[0027] First, in the steel structure production plant or on-site processing plant, the formed hot-rolled H-beam 1 or hot-rolled H-beam 2 is formed, and the upper and lower flanges of two or more hot-rolled H-beam 1 and hot-rolled H-beam 2 are aligned and squeezed respectively using a positioning device on the production line, or a certain distance is separated, and welded tightly against the long strip or block steel plates on the inside and outside to form a steel composite column or short-limb shear wall. At the same time, according to the design position of the hot-rolled H-beam beam on the composite column or wall side, the "I-beam" base composed of an upper stiffening plate, a vertical connecting plate, and a lower stiffening plate is welded in advance on the production line. At the same time, pins are welded on the outside of the flanges of the hot-rolled H-beam 1 and the hot-rolled H-beam 2 at a certain interval;

[0028] Then, it is transported to the site. According to the lifting capacity of the on-site equipment, a single-layer or three-layer section is freely selected to hoist and install the composite column or short-leg shear wall. Then the hot-rolled H-beam is hoisted to the side "I-beam" base of the hot-rolled H-beam 1 or the hot-rolled H-beam 2, and the hot-rolled H-beam is welded to the hot-rolled H-beam 2 or the hot-rolled H-beam 1 with double-sided fillet welds. The hanging wire mesh is tied on both sides of the hot-rolled H-beam 1 and the hot-rolled H-beam 2, and the formwork is used as a casting template. Fiber cement mortar is poured as a fire protection layer for the hot-rolled H-beam 1 and the hot-rolled H-beam 2;

[0029] Finally, hoist the horizontal components of the floors, handle the joints, pour concrete, and form an integral structure; repeatedly hoist the composite columns or short-leg shear walls composed of hot-rolled H-beam 1 or hot-rolled H-beam 2, and the upper and lower vertical components can be connected by bolt welding or using connecting plates.

[0030] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in the following aspects:

[0031] This method uses hot-rolled H-shaped steel and welds them shoulder to shoulder to form solid or lattice composite columns or shear walls, thereby improving the structural bearing capacity and lateral stiffness, and the construction is fast and efficient.

[0032] The method forms a column core by welding the formed hot-rolled H-shaped steel through primary penetration welding, and pours concrete into the column core to form column core concrete.

[0033] At the same time, by welding pins on the outside of the flanges on both sides of the hot-rolled H-shaped steel and binding the wire mesh, the formwork plate is used as the outer formwork, and the fiber cement mortar is directly poured as the inner and outer fireproof layers of the hot-rolled H-shaped steel.

[0034] In addition, the structural stability can be enhanced by welding upper stiffening plates, vertical connecting plates, lower stiffening plates and other components at one or both ends of the hot-rolled H-shaped steel.

[0035] The assembled hot-rolled H-shaped steel beam-column and the connection method can not only improve the seismic performance and durability of steel structure buildings, but also reduce the construction difficulty and cost, improve the construction efficiency, and meet the requirements of modern building industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A structural schematic diagram of an assembled hot-rolled H-shaped steel beam column proposed by the present invention;

[0037] Figure 2 Another structural schematic diagram of the assembled hot-rolled H-shaped steel beam column proposed by the present invention.

[0038] In the figure: 1. Hot-rolled H-beam 1; 2. Hot-rolled H-beam 2; 3. Full-penetration welding; 4. Side connecting plate; 5. Side connecting plate; 6. Column core concrete; 7. Upper stiffening plate; 8. Pins; 9. Wire mesh; 10. Vertical connecting plate; 11. Lower stiffening plate; 12. Hot-rolled H-beam beam; 13. Beam end stiffening ribs. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Embodiment 1

[0042] Reference Figure 1 , Figure 2 , an assembled hot-rolled H-shaped steel beam-column and a connection method, comprising a hot-rolled H-shaped steel 1, a hot-rolled H-shaped steel 2, a column core 3, a side connection plate 4, a side connection plate 5, a column core concrete 6, an upper stiffening plate 7, a pin 8, a steel mesh 9, a vertical connection plate 10, a lower stiffening plate 11, a hot-rolled H-shaped steel beam 12, and a beam end stiffening rib 13;

[0043] The hot-rolled H-beam 1 is produced by a steel plant, transported to a standardized steel component processing plant or directly processed in a steel plant, and connected to the upper and lower flanges of the hot-rolled H-beam 2, respectively. The connection can be welded by a first-level full-penetration weld 3, or by a side connecting plate 4. The hot-rolled H-beam 1 and the hot-rolled H-beam 2 are welded to form a column core, and concrete is poured into the column core to form a column core concrete 6. If the upper load of the steel composite structure is large or there is a seismic design requirement, hot-rolled H-beams can be welded on the side of the hot-rolled H-beam 1 or the hot-rolled H-beam 2 to form a short-limb shear wall;

[0044] The column core concrete 6 can be filled with ordinary concrete or foamed concrete according to the upper load to improve the structural bearing capacity and lateral stiffness;

[0045] The assembled hot-rolled H-shaped steel beam-column and connection method comprises the following steps in sequence:

[0046] First, in a steel structure production plant or on-site processing plant, the formed hot-rolled H-beam 1 or hot-rolled H-beam 2 is aligned and squeezed with the upper and lower flanges of two or more hot-rolled H-beam 1 and hot-rolled H-beam 2 respectively, or a certain distance is separated, and welded on the inner and outer sides close to the long strip or block steel plate to form a steel composite column or short-limb shear wall. At the same time, according to the design position of the hot-rolled H-beam beam 12 on the side of the composite column or wall, the "I-beam" base composed of the upper stiffening plate 7, the vertical connecting plate 10, and the lower stiffening plate 11 is welded in advance on the production line. At the same time, pins 8 are welded on the outer sides of the flanges of the hot-rolled H-beam 1 and the hot-rolled H-beam 2 at a certain interval.

[0047] Then, it is transported to the site. According to the lifting capacity of the on-site equipment, a single-layer or three-layer section is freely selected for hoisting and installation of composite columns or short-leg shear walls. Then, the hot-rolled H-beam beam 12 is hoisted to the side "I-beam" base of the hot-rolled H-beam 1 or the hot-rolled H-beam 2, and the hot-rolled H-beam beam 12 is welded to the hot-rolled H-beam 2 or the hot-rolled H-beam 1 by double-sided fillet welds. The hanging wire mesh 9 is tied on both sides of the hot-rolled H-beam 1 and the hot-rolled H-beam 2, and the formwork is used as a casting template. Fiber cement mortar is poured as a fire protection layer for the hot-rolled H-beam 1 and the hot-rolled H-beam 2.

[0048] Finally, the horizontal components of the floors are hoisted, the joints are processed, and concrete is poured to form the overall structure. Repeatedly hoist the composite columns or short-leg shear walls composed of hot-rolled H-shaped steel 1 or hot-rolled H-shaped steel 2, and the upper and lower vertical components can be connected by bolt welding or using connecting plates.

[0049] Embodiment 2

[0050] On the basis of the first embodiment, a hot-rolled H-shaped steel beam 12 is welded between the upper and lower flanges of the side of the hot-rolled H-shaped steel beam 2. The hot-rolled H-shaped steel beam 12 is finalized and produced in a steel plant and directly transported to the site for welding and connection. The upper stiffening plate 7, the vertical connecting plate 10, and the lower stiffening plate 11 are respectively welded to the bottom of the hot-rolled H-shaped steel beam 12, close to the bottom of the beam;

[0051] The upper stiffening plate 7 is a steel plate of a certain thickness, located below the head of the hot-rolled H-shaped steel beam 12, and is welded to the upper flange, lower flange, and web of the hot-rolled H-shaped steel beam 12 by using fillet welds on both sides, and a vertical connecting plate 10 is welded to the middle position below;

[0052] The vertical connecting plate 10 is a steel plate of a certain thickness, the upper end of which is connected to the corner welds on both sides of the upper stiffening plate 7, and the lower end of which is connected to the corner welds on both sides of the lower stiffening plate 11;

[0053] Embodiment 3

[0054] On the basis of the above embodiment, the lower stiffening plate 11 is a steel plate of a certain thickness, located below the head of the hot-rolled H-shaped steel beam 12, and is welded to the upper flange, lower flange, and web of the hot-rolled H-shaped steel beam 12 by using fillet welds on both sides;

[0055] The two sides of the hot-rolled H-beam 1 or the hot-rolled H-beam 2 are painted with fireproof and anti-corrosion coatings; or positioning pins 8 are welded on the outside, a steel mesh 9 is hung, and a formwork plate is used as an outer template to directly cast fiber cement mortar as the inner and outer fireproof layers of the hot-rolled H-beam 1; the cavity between the upper and lower ends of the hot-rolled H-beam 1 or the hot-rolled H-beam 2 is filled with cement mortar or foam concrete;

[0056] Embodiment 4

[0057] The hot-rolled H-shaped steel 1 is produced by a steel plant and has good mechanical properties. It can be butt-welded with a single or multiple hot-rolled H-shaped steels 2 of the same specification and size in a steel plant or an on-site automated workshop by flange butt welding, or welded with steel plates on the inside and outside to form a special-shaped column or short-leg shear wall, which has good ductility and can jointly bear vertical and horizontal loads.

[0058] The column core concrete 6 can be filled with ordinary concrete or foamed concrete, and the core concrete is constrained by a hoop to improve the vertical bearing capacity of the composite column or shear wall.

[0059] The hot-rolled H-beam beam 12 is distributed between the outwardly extending flanges on one side of the end of the hot-rolled H-beam 1 or the hot-rolled H-beam 2, and the two are integrated by a double-sided welding process. At the same time, an "I-beam" base formed by an upper stiffening plate 7, a vertical connecting plate 10, and a lower stiffening plate 11 is arranged below the bottom plate of the hot-rolled H-beam beam 12, and the sides of the upper stiffening plate 7, the vertical connecting plate 10, and the lower stiffening plate 11 are welded to the hot-rolled H-beam 2 or the hot-rolled H-beam 1, respectively.

[0060] The space between the outwardly extending flanges on one side of the end of the hot-rolled H-shaped steel 1 is filled with cement mortar or fireproof rock wool.

[0061] The two sides of the hot-rolled H-shaped steel 2 can be painted with fire-proof materials and anti-corrosion materials to meet the requirements of the fire resistance index of steel structures. Positioning pins 8 are welded on the outside, wire mesh 9 is hung, and fiber cement mortar is cast in the formwork as a fire-proof wrapping layer, thereby improving the fire resistance and durability of the structure.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembled hot-rolled H-shaped steel beam column, characterized in that: It comprises hot-rolled H-shaped steel, full-penetration welding (3), side connecting plates (5), column core concrete (6), pins (8), and steel wire mesh (9); The hot-rolled H-beam comprises hot-rolled H-beam 1 (1) and hot-rolled H-beam 2 (2); The hot-rolled H-beam 1 (1) is arranged longitudinally, and the hot-rolled H-beam 2 (2) is arranged transversely. The upper and lower flanges of the hot-rolled H-beam 1 (1) and the hot-rolled H-beam 2 (2) are connected, and the connection is welded by first-level penetration welding (3). The hot-rolled H-beam 1 (1) and the hot-rolled H-beam 2 (2) are welded to form a column core, and concrete is poured in the column core to form column core concrete (6); Pins (8) are welded at a certain interval on the outer sides of the upper and lower flanges of the hot-rolled H-shaped steel (1), a steel wire mesh (9) is tied on the pins (8), a formwork plate is used as an outer formwork, and fiber cement mortar is directly poured as an inner and outer fireproof layer of the hot-rolled H-shaped steel (1); The column core concrete (6) is filled with ordinary concrete or foamed concrete according to the size of the upper load, so as to improve the structural bearing capacity and lateral stiffness; Pins (8) are welded at a certain interval on the outer sides of the upper and lower flanges of the hot-rolled H-shaped steel (2), a steel wire mesh (9) is tied on the pins (8), and a formwork plate is used as an outer formwork to directly cast fiber cement mortar as an inner and outer fireproof layer of the hot-rolled H-shaped steel (1); Both sides of the hot-rolled H-beam 1 (1) or the hot-rolled H-beam 2 (2) are painted with fireproof and anti-corrosion paint; or positioning pins (8) are welded on the outside, a steel mesh (9) is hung, and fiber cement mortar is cast in the formwork to serve as a fireproof wrapping layer; the cavity between the upper and lower ends of the hot-rolled H-beam 1 (1) or the hot-rolled H-beam 2 (2) is filled with cement mortar or foam concrete.

2. The assembled hot-rolled H-shaped steel beam column according to claim 1, characterized in that: It also includes a side connecting plate (4), and the side connecting plate (4) is used to weld the upper and lower flange connections of the hot-rolled H-shaped steel (1) and the hot-rolled H-shaped steel (2).

3. The assembled hot-rolled H-shaped steel beam column according to claim 1, characterized in that: It also includes an upper stiffening plate (7), a vertical connecting plate (10), a lower stiffening plate (11), and beam end stiffening ribs (13); The hot-rolled H-shaped steel beam (12) is distributed between the outwardly extending flanges on one side of the end of the hot-rolled H-shaped steel beam (1) or the hot-rolled H-shaped steel beam (2), and the two are integrated by using a double-sided welding process. At the same time, an "I-beam" base formed by an upper stiffening plate (7), a vertical connecting plate (10), and a lower stiffening plate (11) is arranged below the bottom plate of the hot-rolled H-shaped steel beam (12), and the side surfaces of the upper stiffening plate (7), the vertical connecting plate (10), and the lower stiffening plate (11) are respectively welded to the hot-rolled H-shaped steel beam (2) or the hot-rolled H-shaped steel beam (1).

4. The assembled hot-rolled H-shaped steel beam column according to claim 3, characterized in that: The hot-rolled H-beam 1 (1) or the hot-rolled H-beam 2 (2) is welded with a hot-rolled H-beam beam (12) on the side to form a short-limb shear wall; The hot-rolled H-shaped steel beam (12) is welded between the upper and lower flanges of the side of the hot-rolled H-shaped steel beam (2), and the upper stiffening plate (7), the vertical connecting plate (10), and the lower stiffening plate (11) are respectively welded below the end of the hot-rolled H-shaped steel beam (12) close to the bottom of the beam; The upper stiffening plate (7) is a steel plate of a certain thickness, located below the head of the hot-rolled H-shaped steel beam (12), and is respectively welded to the upper flange, lower flange, and web of the hot-rolled H-shaped steel beam (12) by using fillet welds on both sides, and a vertical connecting plate (10) is welded at the middle position below; The vertical connection plate (10) is a steel plate of a certain thickness, the upper end of which is connected to the corner welds on both sides of the upper stiffening plate (7), and the lower end of which is connected to the corner welds on both sides of the lower stiffening plate (11); The lower stiffening plate (11) is a steel plate of a certain thickness, located below the head of the hot-rolled H-shaped steel beam (12), and is respectively welded to the upper flange, lower flange, and web of the hot-rolled H-shaped steel beam (12) by using fillet welds on both sides to form a whole; The beam end stiffening ribs (13) are welded in two passes at a certain interval between the upper and lower flanges of the end of the hot-rolled H-shaped steel beam (12) to enhance the structural bearing capacity of the beam-column connection.

5. The assembled hot-rolled H-shaped steel beam column according to claim 1, characterized in that: The hot-rolled H-shaped steel is produced by the steel mill and transported to the standardized steel component processing plant or directly processed in the steel mill. The hot-rolled H-shaped steel (1) is a hot-rolled steel produced by a steel plant, and can be butt-welded with a single or multiple hot-rolled H-shaped steels (2) of the same specification and size in a steel plant or an on-site automated workshop by flange butt welding, or by welding with steel plates on the inside and outside to form a special-shaped column or a short-leg shear wall, which has good ductility and can jointly bear vertical and horizontal loads.

6. The assembled hot-rolled H-shaped steel beam column according to claim 1, characterized in that: The column core is filled with ordinary concrete or foamed concrete to form column core concrete (6), and the hoop-constrained core concrete technology is used to improve the vertical bearing capacity of the column or wall.

7. The assembled hot-rolled H-shaped steel beam column according to claim 1, characterized in that: The space between the outwardly extending flanges on one side of the end of the hot-rolled H-shaped steel (1) is filled with cement mortar or fireproof rock wool.

8. The assembled hot-rolled H-shaped steel beam column according to claim 1, characterized in that: The two sides of the hot-rolled H-shaped steel (2) can be painted with fireproof materials and anti-corrosion materials to meet the requirements of the steel structure fire resistance index. At the same time, pins (8) are welded, wire mesh (9) is hung, and fiber cement mortar is cast in the formwork to form a fireproof layer, thereby improving the fire resistance and durability of the structure.

9. A method for connecting assembled hot-rolled H-shaped steel beams and columns, characterized in that: The steps include the following sequence: First, in a steel structure production plant or on-site processing plant, the hot-rolled H-shaped steel (1) or hot-rolled H-shaped steel (2) is formed, and the upper and lower flanges of two or more hot-rolled H-shaped steel (1) and hot-rolled H-shaped steel (2) are aligned and squeezed respectively on the production line using a positioning device, or are spaced at a certain distance, and welded closely to the long strip or block steel plate on the inner and outer sides to form a steel composite column or short-leg shear wall; at the same time, according to the design position of the hot-rolled H-shaped steel beam (12) on the side of the composite column or wall, an "I-beam" base composed of an upper stiffening plate (7), a vertical connecting plate (10), and a lower stiffening plate (11) is welded in advance on the production line; at the same time, pins (8) are respectively welded at a certain interval on the outer sides of the flanges of the hot-rolled H-shaped steel (1) and the hot-rolled H-shaped steel (2); Then, it is transported to the site, and according to the lifting capacity of the on-site equipment, a single-layer or three-layer one-section lifting and installation of the composite column or short-leg shear wall is freely selected, and then the hot-rolled H-beam beam (12) is lifted to the side "I-beam" base of the hot-rolled H-beam one (1) or the hot-rolled H-beam two (2), and the hot-rolled H-beam beam (12) is welded to the hot-rolled H-beam two (2) or the hot-rolled H-beam one (1) by double-sided fillet welds; hanging steel wire meshes (9) are tied to both sides of the hot-rolled H-beam one (1) and the hot-rolled H-beam two (2), and a formwork plate is supported as a casting template, and fiber cement mortar is poured as a fire protection layer for the hot-rolled H-beam one (1) and the hot-rolled H-beam two (2); Finally, the horizontal components of the floors are hoisted, the joints are processed, and concrete is poured to form an integral structure; the composite columns or short-leg shear walls composed of hot-rolled H-shaped steel one (1) or hot-rolled H-shaped steel two (2) are repeatedly hoisted, and the upper and lower vertical components can be connected by bolt welding or using connecting plates.

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