Steel reinforced concrete structural beam and construction method

Abstract

The invention discloses a steel reinforced concrete structural beam and a construction method, and belongs to the technical field of building construction.The technical scheme is that the steel reinforced concrete structural beam and the construction method comprise the steps that when a steel beam enters a site, the size, the material and the surface quality of the steel beam are checked, and it is ensured that design requirements are met; before formal installation, the steel beams are pre-assembled, and the accuracy of connection and size is verified; an assembly site is leveled, a special support is installed, and the steel beam is hoisted to the special support; mounting steel bar mounting brackets on the upper surface and the lower surface of the steel beam, and fixing in place; main reinforcements, tie bars and stirrups are installed on the steel beams and bound into a steel reinforcement framework; the steel reinforcement framework and the steel beam are combined into a whole, and lifting lugs are welded; checking the combined body to ensure the structural integrity and the welding quality of the combined body; and the assembly is hoisted to a preset position and connected with the steel column, and the steel bars at the beam-column joints are arranged. The steel reinforced concrete structural beam and the construction method have the beneficial effect that the steel reinforced concrete structural beam and the construction method are provided.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a steel concrete structural beam and a construction method. Background Art

[0002] Steel-concrete structure is the main structural form for realizing large-space and large-span building functions. The synergistic effect of steel and reinforced concrete and reasonable force can reduce the cross-sectional size of the components, increase the available space, and reduce the cost of the project. The construction process of conventional steel-concrete structure is to assemble the steel structure first, and then follow the process of supporting the formwork and tying the steel bars of the ordinary cast-in-place structure after the steel structure is assembled. This construction plan or method is a prior construction method. Under this construction method, the following construction problems are found: 1. After the steel structure beam is installed, the stirrups of the cast-in-place beam need to be broken open and inserted into the steel beam, which is extremely inconvenient and inefficient. 2. After the steel structure is installed, the steel bars of the cast-in-place beam can only be tied at high altitude, which involves some risks of high-altitude operations.

[0003] The technical problem to be solved by the present invention is to solve the problems of inconvenient high-altitude installation, low installation efficiency and high risk factor in the construction of conventional large-span steel-concrete beams. Summary of the invention

[0004] The purpose of the present invention is to provide a steel-concrete structural beam and a construction method.

[0005] The present invention is achieved by the following measures: A construction method of a steel-concrete structural beam, characterized in that it includes: Inspection of steel beams upon arrival: When steel beams arrive at the site, their dimensions, materials and surface quality are inspected to ensure that they meet the design requirements; the inspection contents include but are not limited to: Dimension inspection: Measure the key dimensions of the steel beams, such as length, width and height, to ensure that they are consistent with the design drawings. Material inspection: Check the material certification documents of the steel beams to confirm that their chemical composition, mechanical properties and other indicators meet the requirements.

[0006] Surface quality inspection: Check whether there are cracks, dents, rust and other defects on the surface of the steel beam, and repair or replace it if necessary.

[0007] Pre-assembly: Before formal installation, pre-assemble the steel beams to verify the accuracy of connections and dimensions; any adjustments required should be recorded and corrected before formal installation.

[0008] Assembly site preparation: level the assembly site, install special brackets, and hoist the steel beams onto the special brackets; site leveling: clear the debris on the site, level the ground, and lay pads or sleepers to increase the support area when necessary. Special bracket production and installation: design appropriate brackets according to the shape and size of the steel beams, and accurately position and install them on the site. The brackets should have sufficient load-bearing capacity and stability.

[0009] Steel beam hoisting: Use appropriate hoisting equipment (such as a crane) to lift the steel beam from the transport vehicle and place it stably on a special bracket. During the hoisting process, pay attention to the balance of the steel beam to prevent tilting or collision.

[0010] Rebar installation bracket setting: install rebar installation brackets on the upper and lower surfaces of the steel beam and fix them in place; the rebar installation brackets provide support and positioning for subsequent rebar binding.

[0011] Rebar installation and binding: Install main bars, tension bars and stirrups on the steel beam and bind them into a steel skeleton; Main bar installation: Place the main bars on the bracket according to the design drawings and ensure that their positions are accurate. The spacing and number of rows between the main bars should meet the design requirements. Stirrup installation: Install stirrups between the main bars and fix them to the main bars with wire or binding tape. The spacing and number of stirrups should be strictly in accordance with the design drawings.

[0012] Rebar skeleton binding: connect all the steel bars into an integral skeleton, ensure that the steel bars in each part are firmly connected and not loose. At the same time, pay attention to the thickness of the steel bar's protective layer and use pads and other measures to control it.

[0013] Assembly connection and lifting lug welding: Assemble the steel skeleton and steel beam into a whole and weld the lifting lugs; Inspection before hoisting: Check the assembly to ensure its structural integrity and welding quality; before hoisting, the entire assembly must be thoroughly inspected to ensure its safety and integrity. The inspection includes: Structural Integrity: Check all connection points for tightness and no loose or missing parts.

[0014] Welding quality: Check whether there are cracks, pores and other defects in the welding parts to ensure that the welding quality meets the standards. Weight and balance: Confirm whether the weight of the assembly is within the load-bearing range of the lifting equipment, and check its balance to prevent tilting during the lifting process. Lifting lug inspection: Check the welding quality of the lifting lug to ensure that it can withstand the load during the lifting process.

[0015] Hoisting and connection: Hoist the assembly to the predetermined position, connect it to the steel column, and arrange the steel bars at the beam-column joints.

[0016] Furthermore, the height of the special bracket is 15 cm, so that the steel beam can be lifted to a low height and the binding requirements of the steel bars can be met.

[0017] Furthermore, a plurality of the special brackets are arranged along the length direction of the steel beam.

[0018] Furthermore, the special bracket includes a support plate and support columns symmetrically arranged at both ends of the support plate, and the width of the support plate is smaller than the spacing between adjacent shear bolts on the steel beam.

[0019] Furthermore, the support plate includes plate one and plate two, one end of plate one is provided with a U-shaped groove, one end of plate two is provided with a plug post one inserted into the U-shaped groove, the lower end surface of plate two is fixedly provided with a plug post two inserted under plate one, the upper end surfaces of plate one, plate two and plug post one are flush, and the upper end surface of plug post two is in contact with the lower end of plate one.

[0020] Furthermore, it also includes an end support structure arranged at both ends of the steel beam, the end support structure includes two symmetrically arranged longitudinal rods, the outer ends of the two longitudinal rods are connected by a connecting rod, and the outer sides of the connecting rods are symmetrically provided with diagonal braces placed on the ground, the inner ends of the two longitudinal rods are fixed with screws, the inner ends of the screws pass through the support plates adjacent to them and are connected by nuts, and the two longitudinal rods are located on the outside of the shear bolts on the lower end surface of the steel beam.

[0021] The special bracket is made of plate one and plate two, which can be easily separated from the steel bar binding range after the steel bar binding is completed; the end support structure and the special bracket are connected to form a whole through screws, which can increase the support stability of the steel beam. In addition, the two longitudinal rods can be stuck on both sides of the shear studs to minimize the tipping of the steel beam.

[0022] The end support structure and the special bracket are designed with corresponding counterweights according to actual conditions, or when the special bracket is spliced, one of the support columns can be directly fixed to the ground with expansion screws.

[0023] Furthermore, the side wall of the longitudinal rod is in contact with the side wall of the body of the shear bolt.

[0024] Furthermore, the steel beam is an I-beam, and the steel bar mounting bracket includes a U-shaped plate symmetrically clamped on both sides of the I-beam wing plate, and the two U-shaped plates are fixed with vertical plates facing the outside of the wing plates. The outer ends of the two vertical plates are connected by a horizontal plate, and the horizontal plate is located on the outside of the shear bolts on the wing plate.

[0025] On the other hand, the present embodiment provides a steel-concrete structural beam, characterized in that it comprises an I-beam, wherein the upper end surface of the upper wing plate and the lower end surface of the lower wing plate of the I-beam are both provided with two rows of shear studs and a plurality of steel bar mounting brackets are spaced apart along the length direction of the I-beam; An upper main reinforcement is fixedly arranged on the upper end surface of the reinforcement installation bracket located on the upper wing plate, and a lower main reinforcement is fixedly arranged on the lower end surface of the reinforcement installation bracket located on the lower wing plate. A plurality of upper main reinforcements and lower main reinforcements are arranged along the width direction of the I-beam, and the outermost main reinforcement is located outside the I-beam, and both ends of the main reinforcement extend out of the I-beam. External longitudinal bars are arranged on both sides of the I-beam, and internal longitudinal bars are arranged near the web. The internal longitudinal bars are welded to the web, and the external longitudinal bars and the internal longitudinal bars on the same side of the I-beam and in the same horizontal plane are connected by tension bars; a plurality of external longitudinal bars and internal longitudinal bars are arranged along the height direction of the I-beam, and both ends extend out of the I-beam; It also includes stirrups connecting the upper main reinforcement, the outer longitudinal reinforcement and the lower main reinforcement, and a plurality of stirrups are arranged along the length direction of the I-beam.

[0026] The I-beam, steel bar mounting bracket, upper main bars, lower main bars, outer longitudinal bars, inner longitudinal bars and tension bars are all cast inside the concrete, and the thickness of the steel bar protective layer should not be less than 100 mm.

[0027] The steel bar mounting bracket includes a U-shaped plate symmetrically clamped on both sides of the I-beam wing plate, and the two U-shaped plates are fixedly provided with vertical plates facing the outside of the wing plate. The outer ends of the two vertical plates are connected by a horizontal plate, and the horizontal plate is located on the outside of the shear bolts on the wing plate.

[0028] A plurality of lifting ears are welded on the I-beam or steel bar mounting bracket.

[0029] The technical solution provided by the embodiment of the present invention has the following beneficial effects: through the steel concrete beam reinforcement pre-installation construction method, the inconvenience and low efficiency of the conventional construction method of inserting stirrups into steel beams can be effectively solved. At the same time, a large amount of work of tying steel bars is completed on the ground, reducing the risk of high-altitude operations. This construction method has significantly improved the construction quality, construction efficiency, and personnel safety assurance, and the construction steps are simple, with fewer additional construction components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings used in the embodiments. Obviously, the drawings listed below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle A; Figure 3 For Figure 1 Schematic diagram of the overall structure at different angles; Figure 4 yes Figure 3 A partial enlarged view of point B in the middle; Figure 5 It is a schematic diagram of the structure with the steel mesh removed; Figure 6 is a schematic diagram with the steel mesh removed and the end support structure; Figure 7 yes Figure 6 A partial enlarged view of point C in the middle; Figure 8 It is a structural schematic diagram of a steel bar mounting bracket; Fig. 9 It is a schematic diagram of the special bracket and end support structure; Fig.10 It is a schematic diagram of the structure after the special bracket and the end support structure are disassembled; Fig.11 It is a flow chart of the construction method of steel concrete structural beam.

[0032] In the attached drawings, the components represented by each number are listed as follows: 1. Steel beam; 2. Steel bar installation bracket; 3. Special bracket; 4. Lifting ear; 5. Upper main reinforcement; 6. Lower main reinforcement; 7. Inner longitudinal reinforcement; 8. Outer longitudinal reinforcement; 9. Tie reinforcement; 10. Stirrups; 11. Shear bolts; 12. Longitudinal rod; 13. Connecting rod; 14. Diagonal brace; 15. Screw; 16. Nut; 101. Upper wing plate; 102. Lower wing plate; 103. Web plate; 201. U-shaped plate; 202. Vertical plate; 203. Horizontal plate; 301. Support plate; 302. Support column; 30101. Plate one; 30102. Plate two; 30103. U-shaped groove; 30104. Column one; 30105. Column two. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0034] Embodiment 1: See also Figure 1-Figure 11 A construction method of a steel-concrete structural beam, characterized by comprising: S1. Inspection of steel beam 1 upon arrival: When steel beam 1 arrives at the site, its size, material and surface quality shall be inspected to ensure that it meets the design requirements; the inspection contents include but are not limited to: Size inspection: Measure the key dimensions of steel beam 1, such as length, width and height, to ensure that they are consistent with the design drawings. Material inspection: Check the material certification documents of steel beam 1 to confirm that its chemical composition, mechanical properties and other indicators meet the requirements. Surface quality inspection: Check whether there are defects such as cracks, dents, rust and so on on the surface of steel beam 1, and repair or replace if necessary.

[0035] S2. Pre-assembly: Before formal installation, pre-assemble the steel beam 1 to verify the accuracy of the connection and size; any adjustments required should be recorded and corrected before formal installation.

[0036] S3. Assembly site preparation: Level the assembly site, install the special bracket 3, and hoist the steel beam 1 onto the special bracket 3; Site leveling: Clear the debris on the site, level the ground, and lay pads or sleepers to increase the support area if necessary. Production and installation of special bracket 3: Design a suitable bracket according to the shape and size of the steel beam 1, and accurately position and install it on the site. The bracket should have sufficient load-bearing capacity and stability. Hoisting of steel beam 1: Use appropriate hoisting equipment (such as a crane) to lift the steel beam 1 from the transport vehicle and place it steadily on the special bracket 3. During the hoisting process, pay attention to the balance of the steel beam 1 to prevent tilting or collision.

[0037] S4. Setting of steel bar installation bracket 2: Install steel bar installation bracket 2 on the upper surface and lower surface of steel beam 1 and fix it in place; steel bar installation bracket 2 provides support and positioning for subsequent steel bar binding.

[0038] S5. Installation and binding of steel bars: Install main bars, tension bars 9 and stirrups 10 on the steel beam 1, and bind them into a steel skeleton; Installation of main bars: According to the design drawings, place the main bars on the bracket and ensure that their positions are accurate. The spacing and number of rows between the main bars should meet the design requirements. Installation of stirrups 10: Install stirrups 10 between the main bars and fix them to the main bars with wire or binding tape. The spacing and number of stirrups 10 should be strictly implemented in accordance with the design drawings. Binding of steel skeleton: Connect all steel bars into an integral skeleton to ensure that the connections between the steel bars in each part are firm and there is no looseness. At the same time, pay attention to the thickness of the protective layer of the steel bars and use pads and other measures to control it.

[0039] S6, assembly connection and welding of lifting lugs 4: Assemble the steel skeleton and the steel beam 1 into a whole, and weld the lifting lugs 4; S7. Inspection before hoisting: Inspect the assembly to ensure its structural integrity and welding quality; before hoisting, the entire assembly must be thoroughly inspected to ensure its safety and integrity. The inspection content includes: Structural integrity: Check whether all connection points are firm and whether there are loose or missing parts. Welding quality: Check whether there are cracks, pores and other defects in the welding parts to ensure that the welding quality meets the standards. Weight and balance: Confirm whether the weight of the assembly is within the load-bearing range of the hoisting equipment, and check its balance to prevent tilting during the hoisting process. Lifting lug 4 inspection: Check the welding quality of lifting lug 4 to ensure that it can withstand the load during the hoisting process.

[0040] S8. Hoisting and connection: Hoist the assembly to the predetermined position, connect it to the steel column, and arrange the steel bars at the beam-column joints.

[0041] The height of the special bracket 3 is 15 cm, so that the steel beam 1 is lifted to a low height and the binding requirements of the steel bars are met.

[0042] Several special brackets 3 are arranged along the length direction of the steel beam 1 .

[0043] The special bracket 3 includes a support plate 301 and support columns 302 symmetrically arranged at both ends of the support plate 301 . The width of the support plate 301 is smaller than the spacing between adjacent shear studs 11 on the steel beam 1 .

[0044] The support plate 301 includes a plate 1 30101 and a plate 2, a U-shaped groove is provided at one end of the plate 1 30101, a plug post 1 30104 is provided at one end of the plate 2 to be inserted into the U-shaped groove, a plug post 2 30105 is fixedly provided on the lower end surface of the plate 2 to be inserted under the plate 1 30101, the upper end surfaces of the plate 1 30101, the plate 2 and the plug post 1 30104 are flush, and the upper end surface of the plug post 2 30105 is in contact with the lower end of the plate 1 30101.

[0045] It also includes an end support structure arranged at both ends of the steel beam 1, and the end support structure includes two symmetrically arranged longitudinal rods 12. The outer ends of the two longitudinal rods 12 are connected by a connecting rod 13, and the outer sides of the connecting rod 13 are symmetrically provided with diagonal braces placed on the ground. The inner ends of the two longitudinal rods 12 are fixed with screws 15, and the inner ends of the screws 15 pass through the adjacent support plates 301 and are connected by nuts 16. The two longitudinal rods 12 are located on the outside of the shear bolts 11 on the lower end surface of the steel beam 1.

[0046] The special bracket 3 is formed by splicing the first plate 30101 and the second plate, which can be conveniently separated from the steel bar binding range after the steel bar binding is completed in the later stage; the end support structure and the special bracket 3 are connected to form a whole through the screw 15, which can increase the support stability of the steel beam 1. In addition, the two longitudinal rods 12 can be stuck on both sides of the shear studs 11 to prevent the steel beam 1 from tipping over as much as possible.

[0047] The end support structure and the special bracket 3 are designed with corresponding counterweights according to actual conditions, or when the special bracket 3 is in a splicing form, one of the support columns 302 can be directly fixed to the ground using expansion screws.

[0048] The side wall of the longitudinal rod 12 is in contact with the side wall of the body of the shear stud 11 .

[0049] The steel beam 1 is an I-beam, and the steel bar mounting bracket 2 includes a U-shaped plate 201 symmetrically clamped on both sides of the I-beam wing plate, and the two U-shaped plates 201 are fixedly provided with vertical plates 202 facing the outside of the wing plate. The outer ends of the two vertical plates 202 are connected by a horizontal plate 203, and the horizontal plate 203 is located on the outside of the shear bolts 11 on the wing plate.

[0050] Embodiment 2: See also Figure 1-Figure 10 , this embodiment provides a steel-concrete structural beam, characterized in that it includes an I-beam, the upper end surface of the upper wing plate 101 and the lower end surface of the lower wing plate 102 of the I-beam are both provided with two rows of shear studs 11, and a plurality of steel bar mounting brackets 2 are spaced apart along the length direction of the I-beam; An upper main rib 5 is fixedly arranged on the upper end surface of the steel bar mounting bracket 2 located on the upper wing plate 101, and a lower main rib 6 is fixedly arranged on the lower end surface of the steel bar mounting bracket 2 located on the lower wing plate 102. A plurality of upper main ribs 5 and lower main ribs 6 are arranged along the width direction of the I-beam, and the outermost main rib is located outside the I-beam, and both ends of the main rib extend out of the I-beam. External longitudinal bars 8 are arranged on both sides of the I-beam, and internal longitudinal bars 7 are arranged near the web 103. The internal longitudinal bars 7 are welded to the web 103. The external longitudinal bars 8 and the internal longitudinal bars 7 on the same side of the I-beam and in the same horizontal plane are connected by tie bars 9. Several external longitudinal bars 8 and internal longitudinal bars 7 are arranged along the height direction of the I-beam, and both ends extend out of the I-beam. It also includes stirrups 10 connecting the upper main reinforcement 5, the outer longitudinal reinforcement 8 and the lower main reinforcement 6. A plurality of stirrups 10 are arranged along the length direction of the I-beam.

[0051] The I-beam, the steel bar installation bracket 2, the upper main reinforcement 5, the lower main reinforcement 6, the outer longitudinal reinforcement 8, the inner longitudinal reinforcement 7 and the tension reinforcement 9 are all cast inside the concrete, and the thickness of the steel bar protective layer should not be less than 100 mm.

[0052] The steel bar mounting bracket 2 includes a U-shaped plate 201 symmetrically clamped on both sides of the I-beam wing plate, and the two U-shaped plates 201 are fixedly provided with vertical plates 202 facing the outside of the wing plate. The outer ends of the two vertical plates 202 are connected by a horizontal plate 203, and the horizontal plate 203 is located on the outside of the shear bolts 11 on the wing plate.

[0053] A plurality of lifting ears 4 are welded to the I-beam or steel bar mounting bracket 2 .

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel-concrete structural beam and a construction method, characterized in that: include: When the steel beams arrive at the site, their size, material and surface quality are checked to ensure they meet the design requirements; Before formal installation, pre-assemble the steel beams to verify the accuracy of connections and dimensions; Level the assembly site, install special brackets, and hoist the steel beams onto the special brackets; Install steel bar mounting brackets on the upper and lower surfaces of the steel beam and secure them in place; Install main reinforcement, tie bars and stirrups on the steel beams and tie them into a steel skeleton; Combine the steel frame and the steel beam into a whole and weld the lifting lugs; Inspect the assembly to ensure its structural integrity and welding quality; The assembly is hoisted to the predetermined position, connected to the steel columns, and the steel bars at the beam-column joints are arranged.

2. The construction method of the steel-concrete structural beam according to claim 1, characterized in that: The height of the special bracket is 15 cm.

3. The construction method of the steel-concrete structural beam according to claim 1 is characterized in that: A plurality of the special brackets are arranged along the length direction of the steel beam.

4. The construction method of the steel-concrete structural beam according to claim 3 is characterized in that: The special bracket includes a support plate and support columns symmetrically arranged at both ends of the support plate, and the width of the support plate is smaller than the spacing between adjacent shear bolts on the steel beam.

5. The construction method of the steel-concrete structural beam according to claim 4 is characterized in that: The support plate includes plate one and plate two, one end of plate one is provided with a U-shaped groove, one end of plate two is provided with a plug post one inserted into the U-shaped groove, the lower end surface of plate two is fixedly provided with a plug post two inserted under plate one, the upper end surfaces of plate one, plate two and plug post one are flush, and the upper end surface of plug post two is in contact with the lower end of plate one.

6. The construction method of the steel-concrete structural beam according to claim 5, characterized in that: It also includes an end support structure arranged at both ends of the steel beam, the end support structure includes two symmetrically arranged longitudinal rods, the outer ends of the two longitudinal rods are connected by a connecting rod, and the outer sides of the connecting rods are symmetrically provided with diagonal braces placed on the ground, the inner ends of the two longitudinal rods are fixed with screws, the inner ends of the screws pass through the support plates adjacent to them and are connected by nuts, and the two longitudinal rods are located on the outside of the shear bolts on the lower end surface of the steel beam.

7. The construction method of the steel-concrete structural beam according to claim 6, characterized in that: The side wall of the longitudinal rod is in contact with the side wall of the body of the shear bolt.

8. The construction method of the steel-concrete structural beam according to claim 1, characterized in that: The steel beam is an I-beam, and the steel bar mounting bracket includes a U-shaped plate symmetrically clamped on both sides of the I-beam wing plate, and the two U-shaped plates are fixedly provided with vertical plates facing the outside of the wing plates. The outer ends of the two vertical plates are connected by a horizontal plate, and the horizontal plate is located on the outside of the shear bolts on the wing plate.

9. A steel-concrete structural beam, characterized in that: It comprises an I-beam, wherein the upper end surface of the upper wing plate and the lower end surface of the lower wing plate of the I-beam are both provided with two rows of shear bolts and a plurality of steel bar mounting brackets are arranged at intervals along the length direction of the I-beam; An upper main reinforcement is fixedly arranged on the upper end surface of the reinforcement installation bracket located on the upper wing plate, and a lower main reinforcement is fixedly arranged on the lower end surface of the reinforcement installation bracket located on the lower wing plate. A plurality of upper main reinforcements and lower main reinforcements are arranged along the width direction of the I-beam, and the outermost main reinforcement is located outside the I-beam, and both ends of the main reinforcement extend out of the I-beam. External longitudinal bars are arranged on both sides of the I-beam, and internal longitudinal bars are arranged near the web. The internal longitudinal bars are welded to the web, and the external longitudinal bars and the internal longitudinal bars on the same side of the I-beam and in the same horizontal plane are connected by tension bars; a plurality of external longitudinal bars and internal longitudinal bars are arranged along the height direction of the I-beam, and both ends extend out of the I-beam; It also includes stirrups connecting the upper main reinforcement, the outer longitudinal reinforcement and the lower main reinforcement, and a plurality of stirrups are arranged along the length direction of the I-beam.

10. The steel-concrete structural beam according to claim 9, characterized in that: The steel bar mounting bracket includes a U-shaped plate symmetrically clamped on both sides of the I-beam wing plate, and the two U-shaped plates are fixedly provided with vertical plates facing the outside of the wing plate. The outer ends of the two vertical plates are connected by a horizontal plate, and the horizontal plate is located on the outside of the shear bolts on the wing plate.

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