Hybrid girder and frame structure

Abstract

The invention provides a hybrid girder and a frame structure. The hybrid main beam comprises a strip-shaped main body part which comprises a concrete part; the steel end part is arranged at at least one end of the concrete part and comprises a steel web and a steel end plate which are vertical to the horizontal plane; the steel web extends in the length direction of the concrete part and is at least partially embedded into the concrete part. And the steel end plate is vertically connected with the end part of the steel web, and is provided with at least one connecting hole through which a connecting piece penetrates and is connected with a column. According to the embodiment of the invention, the mixed main beam is adopted to replace a steel main beam in the related technology, the mixed main beam comprises the main body part with the concrete part and the steel end parts located at the two ends of the concrete part, and the concrete part is formed by pouring concrete, so that the steel consumption can be reduced. Moreover, the durability, the fireproof performance and the corrosion resistance of the concrete part are high, fireproof or waterproof materials do not need to be additionally coated, and the fireproof or waterproof material cost and the construction cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of construction technology, and in particular to a hybrid main beam and frame structure. Background Art

[0002] Against the backdrop of accelerated urbanization, various types of buildings are increasing.

[0003] The frame structure consists of a main beam and secondary beams. The main beam is connected to the columns at both ends, while the secondary beam is connected to the main beam at both ends. Related technologies often use pure steel structures, where the main beams are bolted to the columns. However, when the load is high, the main beams require a lot of steel, resulting in high steel material costs. Furthermore, the exposed surfaces of the main beams need to be coated with fireproof and waterproof materials, which increases material and construction costs, as well as subsequent maintenance costs.

[0004] In addition, the connection between the steel main beam and the column needs to be used with the corbel, which is first fixed with bolts and then welded. After that, the welded parts are inspected for flaws and the next step is carried out only after passing the inspection. This results in complicated procedures, increased materials and labor, low construction efficiency and high costs. Summary of the Invention

[0005] In view of the shortcomings of the existing methods, this application proposes a hybrid main beam and frame structure to solve the technical problems existing in the related technology, such as the high cost of steel main beams, the need to use corbels to connect the steel main beams and columns, which leads to complicated procedures, increased materials and labor, low construction efficiency or high costs.

[0006] In a first aspect, an embodiment of the present application provides a hybrid main beam, comprising: The main body is strip-shaped and includes a concrete part; a steel end portion, provided at at least one end of the concrete portion, comprising a steel web and a steel end plate both perpendicular to the horizontal plane; The steel web extends along the length of the concrete portion and is at least partially embedded in the concrete portion; The steel end plate is vertically connected to the end of the steel web plate and has at least one connecting hole for a connecting member to pass through and be connected to the column.

[0007] In some possible embodiments, the steel end portion further comprises: At least one steel upper flange member is located above the concrete portion, and one end of the steel upper flange member is connected to the top end of the steel end plate; The steel lower flange piece is connected to the bottom of the concrete part, the bottom end of the steel web plate, and the bottom end of the steel end plate in sequence along a direction parallel to the concrete part and away from the concrete part.

[0008] In some possible embodiments, the steel upper flange member includes a first steel upper flange plate; The top end of the steel web protrudes from the concrete portion; the first steel upper flange plate is vertically connected to one side of the top end of the steel web and has a distance from the top surface of the concrete portion.

[0009] In some possible embodiments, the steel upper flange member includes a second steel upper flange plate; The second steel upper flange plate is vertically connected to one side of the top end of the steel web plate and overlapped on the concrete portion.

[0010] In some possible embodiments, the upper surface of at least one end of the concrete portion has a recessed area; The second steel upper flange plate is accommodated in the recessed area, and the upper surface is flush with the portion of the concrete portion except the recessed area.

[0011] In some possible embodiments, the steel upper flange member includes: a first steel upper flange plate and a second steel upper flange plate spaced parallel to each other in a vertical direction close to the concrete portion, and a connecting web plate vertically connected therebetween; The second steel upper flange plate is vertically connected to the top of the steel web and overlapped on the concrete portion, and is located between the connecting web and the steel web.

[0012] In some possible embodiments, the hybrid main beam includes at least one of the following: The orthographic projections of the connecting web and the steel web on the horizontal plane at least partially overlap; The width of the first steel upper flange plate is smaller than the width of the steel lower flange member.

[0013] In some possible embodiments, the lower surface of at least one end of the concrete portion has a recessed area; The steel lower flange piece is accommodated in the recessed area, and its lower surface is flush with the portion of the concrete part except the recessed area.

[0014] In some possible embodiments, the hybrid main beam further includes: The first steel bar is arranged parallel to the top of the concrete part, one end of the first steel upper flange plate is connected to one end of the concrete part, and the other end faces the first steel upper flange plate at the other end of the concrete part.

[0015] In some possible embodiments, a portion of the first steel upper flange plate toward the steel upper flange member at the other end of the concrete portion has at least one notch; One end of each first steel bar is embedded in the notch in a one-to-one correspondence and connected to the first steel upper flange plate.

[0016] In some possible embodiments, one end of the first steel bar is connected to the lower surface and / or upper surface of the first steel upper flange plate.

[0017] In some possible embodiments, the hybrid main beam further includes: The second steel bar is arranged parallel to the top of the concrete part, one end of the second steel bar is connected to the first steel upper flange plate at one end of the concrete part, and the other end of the second steel bar is connected to the first steel upper flange plate at the other end of the concrete part.

[0018] In some possible embodiments, closed stirrups are provided on the second steel bars.

[0019] In some possible embodiments, the main body further includes: A plurality of third steel bars are arranged in the concrete portion along the length direction of the concrete portion; The orthographic projection of at least one third steel bar on the steel end plate falls into the connection hole.

[0020] In some possible embodiments, the main body further includes: The first stirrups are perpendicular to the length direction of the concrete portion; at least part of the plurality of first stirrups are arranged in the concrete portion at intervals along the length direction of the concrete portion; The steel web is at least partially embedded in the concrete portion and passes through an area enclosed or partially enclosed by at least one first stirrup.

[0021] In some possible embodiments, the main body further includes: a plurality of fourth steel bars, arranged along the length direction of the concrete portion and passing through the area enclosed or partially enclosed by the plurality of first stirrups; An end portion of at least one fourth reinforcement bar is connected to a lower surface of the second steel upper flange plate of the steel end portion, and / or an end portion of at least one fourth reinforcement bar is connected to an upper surface of the steel lower flange member of the steel end portion.

[0022] In some possible embodiments, the top end of the first stirrup includes a first hook portion and a second hook portion spaced apart in a horizontal direction; The first hook portion and the second hook portion both extend out of the concrete portion; The hybrid main beam further includes at least one of the following: The first steel bars are arranged between the first hook portion and the second hook portion; At least one first steel bar is passed through the hook of the first hook portion; At least one first steel bar is passed through the hook of the second hook portion.

[0023] In some possible embodiments, the cross-section of the concrete portion of the main body is rectangular or I-shaped, or the cross-sections of both ends of the concrete portion of the main body are rectangular and the cross-section of the middle portion is I-shaped.

[0024] In a second aspect, an embodiment of the present application further provides a frame structure for use in a structure inside a building, comprising: a column, and a plurality of any hybrid main beams provided in the first aspect above; A plurality of hybrid main beams are arranged in at least two directions in a horizontal plane, and respective steel ends are connected to vertically extending columns.

[0025] In some possible embodiments, the frame structure further includes a positioning member, a portion of which is fixed to the column, and an upper surface of another portion of the positioning member is connected to a lower surface of the steel end portion where the hybrid main beam is connected to the column.

[0026] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include: In the embodiments of this application, a hybrid main beam is used to replace the steel main beam used in related art. The hybrid main beam comprises a main body with a concrete portion and steel end portions at both ends of the concrete portion. The concrete portion is cast from concrete, which reduces the amount of steel used. Furthermore, the concrete portion has high durability, fire resistance, and corrosion resistance, eliminating the need for additional fireproofing or waterproofing materials, thereby reducing material and construction costs for fireproofing or waterproofing.

[0027] In addition, the steel web of the steel end portion is at least partially embedded in the concrete portion, providing shear resistance and ensuring a highly reliable connection between the steel end portion and the concrete portion. Therefore, the steel end portion is directly connected to the column via a connector, eliminating the need for a combination of brackets, bolts, and welding. This reduces the number of parts and steps required to connect the hybrid main beam to the column, thereby reducing construction complexity and improving efficiency.

[0028] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic structural diagram of the first hybrid main beam provided in an embodiment of the present application; Figure 2 A schematic diagram of the main perspective structure of the first hybrid main beam provided in an embodiment of the present application; Figure 3 A schematic top view of a first hybrid main beam provided in an embodiment of the present application; Figure 4 for Figure 2 A schematic diagram of the side view of the cross section at AA'; Figure 5 for Figure 2 Schematic diagram of the structure of the cross section at BB'; Figure 6 for Figure 2 Structural diagram of the cross section at CC'; Figure 7 for Figure 2Structural diagram of the cross section at DD'; Figure 8 A schematic structural diagram of a second hybrid main beam provided in an embodiment of the present application; Figure 9 A schematic diagram of the main perspective structure of the second hybrid main beam provided in an embodiment of the present application; Figure 10 A partially enlarged schematic diagram of one end of the second hybrid main beam provided in an embodiment of the present application; Figure 11 A schematic top view of a second hybrid main beam provided in an embodiment of the present application; Figure 12 for Figure 9 Schematic diagram of the structure of the section at AA'; Figure 13 for Figure 9 Schematic diagram of the structure of the cross section at BB'; Figure 14 for Figure 9 Structural diagram of the cross section at CC'; Figure 15 for Figure 9 Structural diagram of the cross section at DD'; Figure 16 A schematic structural diagram of a third hybrid main beam provided in an embodiment of the present application; Figure 17 for Figure 16 Structural diagram of the cross section at CC'; Figure 18 A schematic structural diagram of the fourth hybrid main beam provided in an embodiment of the present application; Figure 19 A schematic diagram of the main perspective structure of the fourth hybrid main beam provided in an embodiment of the present application; Figure 20 A schematic diagram of a top view of the structure of a fourth hybrid main beam provided in an embodiment of the present application; Figure 21 for Figure 19 A schematic diagram of the side view of the cross section at AA'; Figure 22 for Figure 19 Schematic diagram of the structure of the cross section at BB'; Figure 23 for Figure 19 Structural diagram of the cross section at CC'; Figure 24 for Figure 19 Schematic diagram of the structure of the cross section at DD'; Figure 25 A schematic structural diagram of the fifth hybrid main beam provided in an embodiment of the present application; Figure 26A schematic diagram of the main structure of the fifth hybrid main beam provided in an embodiment of the present application; Figure 27 A schematic structural diagram of a sixth hybrid main beam provided in an embodiment of the present application; Figure 28 A schematic diagram of the main structure of the sixth hybrid main beam provided in an embodiment of the present application; Figure 29 A schematic structural diagram of a seventh hybrid main beam provided in an embodiment of the present application; Figure 30 A schematic diagram of the main structure of the seventh hybrid main beam provided in an embodiment of the present application; Figure 31 A schematic diagram of a top view of the structure of a seventh hybrid main beam provided in an embodiment of the present application; Figure 32 A schematic structural diagram of an eighth hybrid main beam provided in an embodiment of the present application; Figure 33 A schematic diagram of the main structure of the eighth hybrid main beam provided in an embodiment of the present application; Figure 34 A schematic structural diagram of a ninth hybrid main beam provided in an embodiment of the present application; Figure 35 A schematic diagram of the main structure of the ninth hybrid main beam provided in an embodiment of the present application; Figure 36 A schematic structural diagram of a tenth hybrid main beam provided in an embodiment of the present application; Figure 37 A schematic diagram of the main structure of the tenth hybrid main beam provided in an embodiment of the present application; Figure 38a A schematic diagram of the structure of the second hybrid main beam and secondary beam connection provided in an embodiment of the present application; Figure 38b A schematic diagram of the structure of the third hybrid main beam and secondary beam connection provided in an embodiment of the present application; Figure 39 A schematic diagram of the structure of a hybrid main beam and column connection provided in an embodiment of the present application; Figure 40 、 Figure 42 and Figure 44 Schematic diagrams of the structures of the connection between several hybrid main beams and composite plates provided in the embodiments of the present application; Figure 41 、 Figure 43 and Figure 45 Schematic diagram of the structure of several hybrid main beams and floor decking connections provided in the embodiments of the present application.

[0030] Reference numerals: 100-mixed main beam; 110-main body; 111-concrete part; 112-fourth steel bar; 113-first stirrup; 1131-first hook portion; 1132-second hook portion; 114-angle steel; 115-second stirrup; 116-closed stirrup; 120-steel ends; 121-steel web; 122-steel end plate; 1220-connection hole; 123-Steel upper flange; 1231-first steel upper flange plate; 1232-second steel upper flange plate; 1233-connecting web plate; 124-steel lower flange member; 125-first reinforcement; 126-connecting rib; 127-second reinforcement; 200-column; 210-locating piece; 300-secondary beam; 400-composite slab; 500-floor decking. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0032] Those skilled in the art will understand that, unless otherwise stated, the terms "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of this application refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0033] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0034] The research and development ideas of this application include: the frame structure includes a main beam and a secondary beam. The main beam is a beam connected to the column at both ends, and the secondary beam is a beam connected to the main beam at both ends. In the related art, the steel main beam of the pure steel structure is often used and the connection between the steel main beam and the column is made by bolts or a combination of bolts and welding. When the load is large, the amount of steel used in the steel main beam is large, and the cost of steel materials is high. In addition, the exposed surface of the steel main beam needs to be coated with fireproof materials and waterproof materials, which increases the material cost and construction cost, as well as the subsequent maintenance cost.

[0035] In addition, the connection between the steel main beam and the column requires the use of corbels, which increases the number of parts or welding and makes the construction complicated.

[0036] Specifically, when connecting, a corbel is extended from the column. The upper and lower flanges and webs of the steel main beam are clamped to the upper and lower flanges and webs of the corbel, respectively. The steel main beam and column are then secured with numerous bolts. Alternatively, a corbel or connecting plate is extended from the column. The web of the beam is bolted to the corbel or connecting plate, and the upper and lower flanges are then welded to the corbel or column. Both methods require significant amounts of steel, bolts, welding materials, and labor, increasing construction costs.

[0037] The hybrid main beam and frame structure provided in this application is intended to solve the above technical problems of related technologies.

[0038] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0039] The embodiment of the present application provides a hybrid main beam 100, the structural diagram of the hybrid main beam 100 is as follows Figure 1 、 Figure 8 、 Figure 16 or Figure 18 As shown, the hybrid main beam 100 includes a main body 110 and a steel end portion 120 .

[0040] The main body 110 is strip-shaped and includes a concrete portion 111 .

[0041] The steel end portion 120 is provided at at least one end of the concrete portion 111 and includes a steel web 121 and a steel end plate 122 both of which are perpendicular to a horizontal plane.

[0042] The steel web 121 extends along the length direction of the concrete portion 111 and is at least partially embedded in the concrete portion 111 .

[0043] The steel end plate 122 is vertically connected to the end of the steel web 121 and has at least one connection hole 1220 for a connecting member to pass through and connect to the column 200 .

[0044] In this embodiment, a hybrid main beam 100 is used to replace the steel main beam used in related art. The hybrid main beam 100 includes a main body 110 having a concrete portion 111 and steel end portions 120 located at both ends of the concrete portion 111. The concrete portion 111 is cast from concrete, which reduces the amount of steel used. Furthermore, the concrete portion 111 has high durability, fire resistance, and corrosion resistance, eliminating the need for additional fireproofing or waterproofing materials, thereby reducing material and construction costs for fireproofing or waterproofing.

[0045] In addition, the steel web 121 of the steel end portion 120 is at least partially embedded in the concrete portion 111, which can provide shear resistance and ensure a strong connection reliability between the steel end portion 120 and the concrete portion 111. Therefore, the steel end portion 120 is directly connected to the column 200 via a connector, eliminating the need for a corbel connection. This can reduce the number of parts required to connect the hybrid main beam 100 to the column 200, reduce construction complexity, and improve construction efficiency.

[0046] In some possible embodiments, such as Figure 1 、 Figure 8 、 Figure 16 or Figure 18 As shown, the steel end portion 120 further includes at least one steel upper flange member 123 and a steel lower flange member 124 .

[0047] The steel upper flange member 123 is located above the concrete portion 111 , and one end of the steel upper flange member 123 is connected to the top end of the steel end plate 122 .

[0048] The steel lower flange member 124 is connected to the bottom of the concrete portion 111 , the bottom end of the steel web 121 , and the bottom end of the steel end plate 122 in sequence along a direction parallel to the concrete portion 111 and away from the concrete portion 111 .

[0049] In this embodiment, a steel upper flange 123, a steel web 121, and a steel lower flange 124 are vertically arranged in sequence between the steel end plate 122 of the steel end portion 120 and the concrete portion 111. The steel upper flange 123, the steel web 121, and the steel lower flange 124 are each vertically connected to the steel end portion 120, and the steel upper flange 123 and the steel lower flange 124 are also each vertically connected to the steel web 121, thereby increasing the load-bearing capacity of the steel end portion 120 and reducing its own weight.

[0050] For some possible embodiments, please refer to Figure 1-Figure 7 The steel upper flange member 123 includes a first steel upper flange plate 1231 .

[0051] The top of the steel web 121 protrudes from the concrete portion 111 ; the first steel upper flange plate 1231 is vertically connected to one side of the top of the steel web 121 and has a gap with the top surface of the concrete portion 111 .

[0052] In this embodiment, the first steel upper flange plate 1231 is a plate-shaped object, which is arranged parallel to the upper surface of the concrete part 111. When the floor slab is subsequently supported and concrete is poured, the steel end portion 120 is poured into the concrete at the same time, so that the first steel upper flange plate 1231 of the steel end portion 120 can be embedded between the concrete, thereby improving the structural stability of the integrated structure formed by the steel end portion 120 and the concrete.

[0053] Alternatively, as Figure 5As shown, the width of the first steel upper flange plate 1231 is smaller than the width of the steel lower flange member 124 .

[0054] Similarly, the width of first upper steel flange plate 1231 is relatively narrow. During the subsequent concrete pouring process, there is a large space between the two sides of first upper steel flange plate 1231 and the formwork, which facilitates the concrete to fall to the bottom of steel end portion 120 and cover the entire steel end portion 120. Furthermore, the relatively narrow width of first upper steel flange plate 1231 results in a low weight.

[0055] For some possible embodiments, please refer to Figure 1-Figure 7 The hybrid main beam 100 further includes: a first steel bar 125 .

[0056] The first steel bar 125 is arranged parallel to the top of the concrete part 111 , with one end connected to the first steel upper flange plate 1231 at one end of the concrete part 111 and the other end facing the first steel upper flange plate 1231 at the other end of the concrete part 111 .

[0057] In this embodiment, the first steel bar 125 is arranged parallel to the top of the concrete part 111, one end of which is connected to the first steel upper flange plate 1231, and the other end is suspended in the air, which can provide a steel bar binding position for the composite beam and plate, thereby facilitating the formation of a composite beam and plate structure.

[0058] For some possible embodiments, please refer to Figure 1-Figure 7 The portion of the first steel upper flange plate 1231 facing the other end of the concrete portion 111 of the steel upper flange member 123 has at least one notch.

[0059] One end of each first steel bar 125 is embedded in the notch in a one-to-one correspondence and connected to the first steel upper flange plate 1231 .

[0060] In this embodiment, one end of each first steel bar 125 is embedded in the notch in a one-to-one correspondence, so that the first steel upper flange plate 1231 can limit the position of the first steel bar 125 in the horizontal direction. In addition, the connection area between the first steel bar 125 and the first steel upper flange plate 1231 can be increased, thereby improving the connection stability between the first steel bar 125 and the first steel upper flange plate 1231.

[0061] For some possible embodiments, please refer to Figure 1-Figure 7 One end of the first steel bar 125 is connected to the lower surface and / or upper surface of the first steel upper flange plate 1231.

[0062] In an embodiment of the present application, when the load borne by the hybrid main beam 100 is large, a larger number of first steel bars 125 need to be set in the hybrid main beam 100, and one end of the first steel bar 125 is connected to the lower surface and / or upper surface of the first steel upper flange plate 1231, which can increase the connection position of the first steel bar 125 on the first steel upper flange plate 1231.

[0063] For some possible embodiments, please refer to Figures 29-37 The hybrid main beam 100 further includes: a second steel bar 127.

[0064] The second steel bar 127 is arranged parallel to the top of the concrete part 111 , with one end connected to the first steel upper flange plate 1231 at one end of the concrete part 111 and the other end connected to the first steel upper flange plate 1231 at the other end of the concrete part 111 .

[0065] In an embodiment of the present application, a longitudinal first steel bar 125 is provided on the steel end portion 120. At the construction site, the two first steel bars 125 on the two steel ends 120 are connected by overlapping or other means to obtain a second steel bar 127. The second steel bar 127 includes the first steel bar 125 and the connecting steel bar between the two first steel bars 125.

[0066] In an embodiment of the present application, a longitudinal first steel bar 125 is provided on the steel end portion 120, which is used for overlapping or connecting the missing steel bars in the middle at the construction site or other means; since the first steel bars 125 on the steel end portion 120 can bear the negative bending moment of the hybrid main beam 100 near the column 200, there is no negative bending moment in the middle part of the hybrid main beam 100, and the number of all steel bars overlapped at the construction site may be equal to the number of first steel bars 125 provided on the steel end portion 120, or may be less than the number of first steel bars 125 provided on the steel end portion 120; in addition, only 4 first steel bars 125 are shown in the figure, and the actual number may be more than 4.

[0067] For some possible embodiments, please refer to Figures 29-37 , a closed stirrup 116 is arranged on the first steel bar 125.

[0068] In the embodiment of the present application, a plurality of closed stirrups 116 are fixed to the first steel bar 125 .

[0069] For some possible embodiments, please refer to Figures 8-15 , the steel upper flange member 123 includes a second steel upper flange plate 1232 .

[0070] The second steel upper flange plate 1232 is vertically connected to one side of the top end of the steel web 121 and overlapped on the concrete portion 111 .

[0071] In this embodiment, second upper steel flange plate 1232 is perpendicularly connected to one side of the top of steel web 121 and overlaps concrete portion 111. This allows it to be superimposed with the subsequent load-bearing floor slab, forming a single integrated structure after concrete pouring. Furthermore, the connection between second upper steel flange plate 1232 and concrete portion 111 enhances the structural stability of the integrated structure formed by steel end portion 120 and main body 110.

[0072] Alternatively, as Figure 9 As shown, the upper surface of the second steel upper flange plate 1232 is connected to the steel end plate 122 via angle steel, which can enhance the structural stability and bearing capacity of the steel end portion 120 .

[0073] Alternatively, as Figure 9 As shown, the lower surface of the steel lower flange member 124 is connected to the steel end plate 122 via angle steel, which can enhance the structural stability and bearing capacity of the steel end portion 120 .

[0074] For some possible embodiments, please refer to Figure 9 The upper surface of at least one end of the concrete portion 111 has a recessed area.

[0075] The second steel upper flange plate 1232 is accommodated in the recessed area, and its upper surface is flush with the portion of the concrete portion 111 except the recessed area.

[0076] In this embodiment, the second steel upper flange plate 1232 is embedded in the concrete portion 111, and the surfaces at the connection between the second steel upper flange plate 1232 and the concrete portion 111 are flush, so that the overall shape of the main body 110 is relatively regular, which helps to maintain the rigidity of the overall structure, reduce the rigidity mismatch or imbalance caused by the irregular shape, and the appearance is also more neat, which helps to facilitate connection with other structures.

[0077] For some possible embodiments, please refer to Figures 18-24 The steel upper flange member 123 includes: a first steel upper flange plate 1231 and a second steel upper flange plate 1232 arranged in parallel along a vertical direction close to the concrete part 111, and a connecting web 1233 vertically connected therebetween.

[0078] The second steel upper flange plate 1232 is vertically connected to the top of the steel web 121 and overlapped on the concrete portion 111 , and is located between the connecting web 1233 and the steel web 121 .

[0079] In this embodiment, the steel upper flange member 123 comprises an interconnected first steel upper flange plate 1231, a connecting web 1233, and a second steel upper flange plate 1232. The member is H-shaped and connected above the steel web 121. The second steel upper flange plate 1232 is located closer to the concrete portion 111 and connected to the steel web 121. When the floor slab is subsequently supported and concrete is poured, the steel end portion 120 is simultaneously poured into the concrete, so that the concrete fills the area between the first and second steel upper flange plates 1231, 1232 of the steel end portion 120. This creates a tighter connection between the steel end portion 120 and the concrete, thereby enhancing the structural stability of the integrated structure formed by the steel end portion 120 and the concrete.

[0080] Optionally, the connecting web 1233 vertically overlaps with the steel web 121. Specifically, the connecting web 1233 and the steel web 121 are respectively connected to the upper and lower sides of the second steel upper flange plate 1232 and overlap in the vertical direction, so as to share the vertical load and improve the bearing capacity.

[0081] Optionally, the first steel upper flange plate 1231 and the second steel upper flange plate 1232 are both arranged in parallel with a distance between them.

[0082] Considering that in the process of building a floor slab on the hybrid main beam 100 in the future, it is necessary to pour concrete to connect the floor slab and the hybrid main beam 100 into one. Specifically, the steel end 120 can be surrounded by a template to form a pouring space, and concrete can be poured so that the concrete covers the steel end 120. Therefore, please refer to Figure 22 In some possible embodiments, the width of the first steel upper flange plate 1231 is smaller than the width of the steel lower flange member 124 .

[0083] In this embodiment, the width of the first upper steel flange plate 1231 is relatively narrow. During the subsequent concrete pouring process, a large space is left between the two sides of the first upper steel flange plate 1231 and the formwork, facilitating the concrete to fall to the bottom of the steel end portion 120, thereby enveloping the entire steel end portion 120. Furthermore, the relatively narrow width of the first upper steel flange plate 1231 results in a relatively light weight.

[0084] Optionally, the width of the second steel upper flange plate 1232 is smaller than the width of the steel lower flange member 124 .

[0085] Similarly, the width of the second upper steel flange plate 1232 is relatively narrow. During the subsequent concrete pouring process, there is a large space between the two sides of the second upper steel flange plate 1232 and the formwork, which facilitates the concrete to fall to the bottom of the steel end portion 120 and cover the entire steel end portion 120. Furthermore, the relatively narrow width of the second upper steel flange plate 1232 is relatively light.

[0086] It should be noted that the widths of the first steel upper flange plate 1231 and the second steel upper flange plate 1232 refer to their respective dimensions in a horizontal plane perpendicular to the extension direction of the main body 110. The extension direction of the main body 110 is the longitudinal direction of the main body 110.

[0087] For some possible embodiments, please refer to Figure 19 The lower surface of at least one end of the concrete portion 111 has a recessed area.

[0088] The steel lower flange member 124 is accommodated in the recessed area, and its lower surface is flush with the portion of the concrete portion 111 excluding the recessed area.

[0089] In this embodiment, the steel lower flange member 124 is embedded in the concrete portion 111, and the surfaces at the connection between the steel lower flange member 124 and the concrete portion 111 are flush, so that the overall shape of the main body 110 is relatively regular, which helps to maintain the rigidity of the overall structure and reduce the rigidity mismatch or imbalance caused by the irregular shape. The appearance is also more neat, which helps to facilitate connection with other structures.

[0090] Optionally, the steel lower flange member 124 is plate-shaped and is arranged parallel to the first steel upper flange plate 1231 and the second steel upper flange plate 1232 .

[0091] Considering that the hybrid main beam 100 is produced using a long-line pedestal, specifically, long third steel bars are simultaneously placed in multiple hybrid main beams 100 and cut later, therefore, in some possible embodiments, the main body 110 further includes: a plurality of third steel bars.

[0092] A plurality of third steel bars are disposed in the concrete portion 111 along the length direction of the concrete portion 111 .

[0093] The orthographic projection of the at least one third steel bar on the steel end plate 122 falls into the connection hole 1220 .

[0094] In this embodiment, the third steel bar that is pre-tensioned and has a certain prestress can pass through the connection hole 1220 of the steel end portion 120 and is set in multiple hybrid main beams 100 at the same time. When the hybrid main beam 100 is completed as a whole, the pre-tensioned third steel bar is relaxed and then cut. The embodiment of the present application does not require additional holes to be opened in the steel end portion 120 for the third steel bar to pass through, so that the hybrid main beam 100 with the steel end portion 120 can also be constructed using the existing long-line method pedestal, which has strong universality and ensures construction efficiency. Moreover, existing construction tools can be applied, which also reduces construction costs.

[0095] Optionally, the third steel bar may include at least one of prestressed steel bars, prestressed steel strands or prestressed steel wires, which can enhance the crack resistance and bearing capacity of the hybrid main beam 100 and reduce deflection.

[0096] In the related art, to improve the shear resistance of the ends of the main beam, solutions such as increasing the density of the first stirrups, increasing the diameter of the first stirrups, or configuring bent ribs to increase the shear reinforcement area are often adopted. In addition, separate connectors must be provided at both ends of the secondary beam 300, which requires more structures and a large amount of material. To this end, the present application also provides the following implementation method: In some possible embodiments, such as Figure 2 、 Figure 9 or Figure 19 As shown, the main body 110 further includes: a first stirrup 113 .

[0097] The first stirrups 113 are perpendicular to the length direction of the concrete portion 111 ; at least a portion of the plurality of first stirrups 113 are arranged in the concrete portion 111 at intervals along the length direction of the concrete portion 111 .

[0098] The steel web 121 is at least partially embedded in the concrete portion 111 and passes through an area enclosed or partially enclosed by at least one first stirrup 113 .

[0099] In this embodiment, the steel web 121 is at least partially embedded in the concrete portion 111 and passes through an area enclosed or partially enclosed by at least one first stirrup 113. The steel web 121 and the passed first stirrup 113 are combined to form a shear reinforcement zone. There is no need to set up an additional shear reinforcement zone by increasing the density of the first stirrup 113. While providing sufficient shear resistance, it also takes into account the function of connecting with other structures, simplifies the structure of the hybrid main beam 100, and can improve the construction efficiency of the hybrid main beam 100.

[0100] In some possible embodiments, the main body 110 further includes: a plurality of fourth steel bars 112 .

[0101] At least one fourth steel bar 112 is arranged along the length direction of the concrete portion 111 in the area enclosed or partially enclosed by the multiple first stirrups 113 and is spaced apart from at least one of the second steel upper flange plate 1232 and the steel lower flange member 124 .

[0102] In some possible embodiments, the main body 110 further includes: a plurality of fourth steel bars.

[0103] The plurality of fourth steel bars are arranged along the length direction of the concrete portion 111 through the area enclosed or partially enclosed by the plurality of first stirrups; An end portion of at least one fourth steel bar is connected to a lower surface of the second steel upper flange plate 1232 of the steel end portion 120 .

[0104] In this embodiment, the fourth steel bar is fixedly connected to the lower surface of the first steel upper flange plate 1231 for force transmission, and can also enhance the connection stability between the steel end portion 120 and the main body 110, thereby improving the overall structural stability and bearing capacity of the hybrid main beam 100.

[0105] In some possible embodiments, an end portion of the at least one fourth reinforcement bar is connected to an upper surface of the steel lower flange 124 of the steel end portion 120 .

[0106] In this embodiment, the fourth steel bar is fixedly connected to the upper surface of the steel lower flange member 124 for force transmission, and can also enhance the connection stability between the steel end portion 120 and the main body portion 110, thereby improving the overall structural stability and bearing capacity of the hybrid main beam 100.

[0107] It can be understood that the difference between the fourth steel bar and the fourth steel bar 112 is that the fourth steel bar contacts the steel upper flange part 123 or the steel lower flange part 124 of the steel end part 120, while the fourth steel bar 112 does not contact the steel upper flange part 123 or the steel lower flange part 124 of the steel end part 120.

[0108] In some possible embodiments, such as Figure 1 As shown, the top end of the first stirrup includes a first hook portion 1131 and a second hook portion 1132 spaced apart in the horizontal direction.

[0109] The first hook portion 1131 and the second hook portion 1132 both extend from the concrete portion 111 .

[0110] In this embodiment, the first hook portion 1131 and the second hook portion 1132 extending from the top end of the first stirrup 113 can improve the anchoring ability of the first stirrup 113 .

[0111] Specifically, the first hook portion 1131 and the second hook portion 1132 are combined with the longitudinal steel bars corresponding to the post-cast composite beam and slab and another portion of the inverted steel bars to form a closed first stirrup 113 .

[0112] In some possible embodiments, such as Figure 3 As shown, the first steel bars 125 are arranged between the first hook portion 1131 and the second hook portion 1132 .

[0113] In this embodiment, the plurality of first steel bars 125 are arranged at intervals along the horizontal direction and are all located between the first hook portion 1131 and the second hook portion 1132 .

[0114] In some possible embodiments, such as Figure 40 As shown, at least one first steel bar 125 is passed through the hook of the first hook portion 1131 .

[0115] In this embodiment, a plurality of first steel bars 125 are arranged at intervals along the horizontal direction, and the first steel bars 125 at the edge are passed through the hooks of the first hook portions 1131 . In other words, the first hook portions 1131 are placed on the first steel bars 125 at the edge.

[0116] In some possible embodiments, such as Figure 27 As shown, at least one first steel bar 125 is passed through the hook of the second hook portion 1132 .

[0117] In this embodiment, a plurality of first steel bars 125 are arranged at intervals in the horizontal direction, and the first steel bars 125 at the edge are passed through the hooks of the second hook portions 1132 . In other words, the second hook portions 1132 are placed on the first steel bars 125 at the edge.

[0118] Alternatively, as Figure 4-Figure 7 、 Figure 12-15 or Figure 21-24 As shown, the cross section of the concrete portion 111 in the vertical direction perpendicular to the length direction of the concrete portion 111 is rectangular.

[0119] Optionally, the cross section of the concrete portion 111 in a vertical direction perpendicular to the length direction of the concrete portion 111 is H-shaped.

[0120] Alternatively, as Figure 16-17 As shown, the middle portion of the concrete portion 111 has an H-shaped cross-section in a vertical direction perpendicular to the length of the concrete portion 111, while the ends of the concrete portion 111 have rectangular cross-sections in a vertical direction perpendicular to the length of the concrete portion 111. Therefore, the web of the middle portion of the concrete portion 111 is thinner, while the webs at the ends are thicker, which can reduce the weight of the hybrid main beam 100 while ensuring its rigidity and hardness.

[0121] Alternatively, as Figure 17 As shown, second stirrups 115 are provided in the top and bottom ends of the concrete portion 111. The second stirrups 115 are closed stirrups. The shape of the closed area matches the shape of the top and bottom ends of the concrete portion 111, which can improve the strength of the top and bottom ends of the concrete portion 111.

[0122] Alternatively, as Figure 38a and Figure 38b As shown, at least one side of the web of the concrete portion 111 is connected with a connecting rib 126 for connecting with the secondary beam 300 .

[0123] Optionally, the top surface of the concrete portion 111 is connected with embedded parts for connection with the floor slab.

[0124] Optionally, a steel bar extends out from the top surface of the concrete portion 111 for connection with the steel bar or concrete in the later cast laminated layer.

[0125] In some possible embodiments, such as Figure 25-28 As shown, the cross section of the concrete portion 111 of the main body 110 is rectangular or I-shaped, or the cross sections of both ends of the concrete portion 111 of the main body 110 are rectangular and the cross section of the middle portion is I-shaped.

[0126] In the embodiments of this application, Figures 25-26 As shown, grooves are formed on both sides of the concrete portion 111, so that the cross-section of the concrete portion 111 of the main body 110 of the hybrid main beam 100 includes an I-shaped cross-section, thereby reducing the weight of the hybrid main beam 100. When the size of the hybrid main beam 100 is large, this structure can reduce the weight of the hybrid main beam 100 and facilitate the installation of the hybrid main beam 100.

[0127] In the embodiments of this application, Figures 27-28 As shown, the cross-sections of the two ends of the concrete portion 111 of the main body 110 are rectangular, and grooves are formed on both sides of the remaining portion of the concrete portion 111, so that the cross-section of the remaining portion of the concrete portion 111 is I-shaped, thereby saving raw materials for the hybrid main beam 100 and reducing the weight of the hybrid main beam 100. When the size of the hybrid main beam 100 is large, since this structure can reduce the weight of the hybrid main beam 100, it is convenient to install the hybrid main beam 100.

[0128] The specific structures of various hybrid main beams 100 are described below with reference to the accompanying drawings.

[0129] Optionally, Figure 1-Figure 7 A first hybrid main beam 100 according to an embodiment of the present application is shown. Figure 1 This is a structural diagram of the first hybrid main beam 100 provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the main perspective structure of the first hybrid main beam 100 provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the top view of the first hybrid main beam 100 provided in an embodiment of the present application. Figure 4 for Figure 2 The side view of the cross section at AA' is shown in the figure. Figure 5 for Figure 2 Schematic diagram of the cross section at BB', Figure 6 for Figure 2 Schematic diagram of the structure of the cross section at CC', Figure 7 for Figure 2 Schematic diagram of the structure of the cross section at DD'.

[0130] In the first hybrid main beam 100 of the embodiment of the present application, the hybrid main beam 100 includes: a main body 110 and a steel end portion 120. The main body 110 is strip-shaped and includes a concrete portion 111. The steel end portion 120 is provided at at least one end of the concrete portion 111 and includes a steel web 121 and a steel end plate 122. The steel web 121 extends along the length direction of the concrete portion 111 and is at least partially embedded in the concrete portion 111. The steel end plate 122 is vertically connected to the end of the steel web 121 and has at least one connection hole 1220 for allowing a connector to pass through and connect to the column 200.

[0131] In the first hybrid main beam 100 of the present embodiment, the steel end portion 120 further includes at least one steel upper flange 123 and a steel lower flange 124. The steel upper flange 123 is located above the concrete portion 111, and one end of the steel upper flange 123 is connected to the top of the steel end plate 122. The steel lower flange 124 is connected to the bottom of the concrete portion 111, the bottom end of the steel web 121, and the bottom end of the steel end plate 122, in a direction parallel to and away from the concrete portion 111.

[0132] In the first hybrid main beam 100 of the present embodiment, the steel upper flange member 123 includes a first steel upper flange plate 1231. One side of the top end of the steel web 121 protrudes from the concrete portion 111; the first steel upper flange plate 1231 is vertically connected to one side of the top end of the steel web 121 and is spaced apart from the top surface of the concrete portion 111.

[0133] In the first hybrid main beam 100 of the embodiment of the present application, the hybrid main beam 100 further includes a first steel bar 125. The first steel bar 125 is arranged parallel to and above the concrete portion 111, with one end connected to the first steel upper flange plate 1231 at one end of the concrete portion 111 and the other end facing the first steel upper flange plate 1231 at the other end of the concrete portion 111.

[0134] In the first hybrid main beam 100 of the present embodiment, the portion of the first steel upper flange plate 1231 facing the steel upper flange member 123 at the other end of the concrete portion 111 has at least one notch. One end of each first steel bar 125 is embedded in the notch and connected to the first steel upper flange plate 1231.

[0135] In the first hybrid main beam 100 of the present embodiment, the main body 110 further includes first stirrups. The first stirrups are perpendicular to the length of the concrete portion 111. At least portions of the first stirrups are spaced apart within the concrete portion 111 along the length of the concrete portion 111. The steel web 121 is at least partially embedded within the concrete portion 111 and extends through the area enclosed or partially enclosed by at least one first stirrup.

[0136] In the first hybrid main beam 100 of the present embodiment, the top end of the first stirrup includes a first hook portion 1131 and a second hook portion 1132 spaced apart horizontally. The first hook portion 1131 and the second hook portion 1132 both extend from the concrete portion 111. The first steel bar 125 is disposed between the first hook portion 1131 and the second hook portion 1132.

[0137] In the first hybrid main beam 100 of the embodiment of the present application, the cross-section of the concrete portion 111 is rectangular.

[0138] Optionally, Figures 8-15 The second hybrid main beam 100 of the embodiment of the present application is shown. Figure 8 This is a structural diagram of the second hybrid main beam 100 provided in an embodiment of the present application. Figure 9 This is a schematic diagram of the main perspective structure of the second hybrid main beam 100 provided in an embodiment of the present application. Figure 10 This is a partially enlarged schematic diagram of one end of the second hybrid main beam 100 provided in an embodiment of the present application. Figure 11 This is a top view of a second hybrid main beam 100 provided in an embodiment of the present application. Figure 12 for Figure 9 Schematic diagram of the cross section at AA', Figure 13 for Figure 9 Schematic diagram of the cross section at BB', Figure 14 for Figure 9 Schematic diagram of the structure of the cross section at CC', Figure 15 for Figure 9 The structural diagram of the cross section at DD' in the figure mainly describes the differences from the first hybrid main beam 100. In the second hybrid main beam 100 of the present embodiment, the steel upper flange member 123 includes a second steel upper flange plate 1232. The second steel upper flange plate 1232 is perpendicularly connected to one side of the top of the steel web 121 and overlaps the concrete portion 111.

[0139] In the second hybrid main beam 100 of the present embodiment, the upper surface of at least one end of the concrete portion 111 has a recessed area. The second steel upper flange plate 1232 is accommodated in the recessed area, and its upper surface is flush with the portion of the concrete portion 111 excluding the recessed area.

[0140] The other structures of the second hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the first hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0141] Optionally, Figure 16-17 The third hybrid main beam 100 of the embodiment of the present application is shown. Figure 16 This is a structural diagram of the third hybrid main beam 100 provided in an embodiment of the present application. Figure 17 for Figure 16The structural diagram of the cross section at CC' is shown here, and the differences from the first hybrid main beam 100 are mainly introduced.

[0142] In the third hybrid main beam 100 of the embodiment of the present application, the middle part of the concrete portion 111 has an H-shaped cross-section in the vertical direction perpendicular to the length direction of the concrete portion 111, and the two ends of the concrete portion 111 have a rectangular cross-section in the vertical direction perpendicular to the length direction of the concrete portion 111.

[0143] The other structures of the third hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the first hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0144] Optionally, Figures 18-24 The fourth hybrid main beam 100 of the embodiment of the present application is shown. Figure 18 This is a structural diagram of the fourth hybrid main beam 100 provided in an embodiment of the present application. Figure 19 This is a schematic diagram of the main perspective structure of the fourth hybrid main beam 100 provided in an embodiment of the present application. Figure 20 This is a schematic diagram of a top view of the structure of the fourth hybrid main beam 100 provided in an embodiment of the present application. Figure 21 for Figure 19 The side view of the cross section at AA' is shown in the figure. Figure 22 for Figure 19 Schematic diagram of the cross section at BB', Figure 23 for Figure 19 Structural diagram of the cross section at CC', Figure 24 for Figure 19 The structural diagram of the cross section at DD' is shown in FIG. 1 , and the differences from the first hybrid main beam 100 are mainly introduced here.

[0145] In the fourth hybrid main beam 100 of the present embodiment, the steel upper flange member 123 includes a first steel upper flange plate 1231 and a second steel upper flange plate 1232, which are arranged parallel to each other in a vertical direction near the concrete portion 111, and a connecting web 1233 perpendicularly connected therebetween. The second steel upper flange plate 1232 is perpendicularly connected to one side of the top end of the steel web 121 and overlaps the concrete portion 111, and is located between the connecting web 1233 and the steel web 121.

[0146] In the fourth hybrid main beam 100 of the embodiment of the present application, the connecting web 1233 and the steel web 121 overlap in the vertical direction.

[0147] In the fourth hybrid main beam 100 of the embodiment of the present application, the width of the first steel upper flange plate 1231 is smaller than the width of the steel lower flange member 124 .

[0148] The other structures of the fourth hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the first hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0149] Optionally, Figure 25-26 The fifth hybrid main beam 100 of the embodiment of the present application is shown. Figure 16 This is a structural diagram of the fifth hybrid main beam 100 provided in an embodiment of the present application. Figure 17 This is a schematic diagram of the main structure of the fifth hybrid main beam 100 provided in an embodiment of the present application, and mainly introduces the differences from the first hybrid main beam 100.

[0150] In the fifth hybrid main beam 100 of the embodiment of the present application, the cross-section of the concrete portion 111 in the vertical direction perpendicular to the length direction of the concrete portion 111 is I-shaped.

[0151] The other structures of the fifth hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the first hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0152] Optionally, Figure 27-28 The sixth hybrid main beam 100 of the embodiment of the present application is shown. Figure 27 This is a structural diagram of the sixth hybrid main beam 100 provided in an embodiment of the present application. Figure 28 This is a schematic diagram of the main structure of the sixth hybrid main beam 100 provided in an embodiment of the present application, which mainly introduces the differences from the first hybrid main beam 100.

[0153] In the sixth hybrid main beam 100 of the embodiment of the present application, the middle part of the concrete portion 111 has an I-shaped cross-section in the vertical direction perpendicular to the length direction of the concrete portion 111, and the two ends of the concrete portion 111 have a rectangular cross-section in the vertical direction perpendicular to the length direction of the concrete portion 111.

[0154] The other structures of the sixth hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the first hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0155] Optionally, Figures 29-31 The seventh hybrid main beam 100 of the embodiment of the present application is shown. Figure 29 This is a structural diagram of the seventh hybrid main beam 100 provided in an embodiment of the present application. Figure 30 This is a schematic diagram of the main structure of the seventh hybrid main beam 100 provided in an embodiment of the present application. Figure 31 This is a schematic diagram of the top structure of the seventh hybrid main beam 100 provided in an embodiment of the present application; the differences from the first hybrid main beam 100 are mainly introduced here.

[0156] In the seventh hybrid main beam 100 of the present embodiment, second steel bars 127 are arranged parallel to and above the concrete portion 111. One end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at one end of the concrete portion 111, and the other end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at the other end of the concrete portion 111. Closed stirrups 116 are provided above all second steel bars 127.

[0157] The other structures of the seventh hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the first hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0158] Optionally, Figures 32-33 The eighth hybrid main beam 100 of the embodiment of the present application is shown. Figure 32 This is a structural diagram of an eighth hybrid main beam 100 provided in an embodiment of the present application. Figure 33 This is a schematic diagram of the main structure of the eighth hybrid main beam 100 provided in an embodiment of the present application; the differences from the fourth hybrid main beam 100 are mainly introduced here.

[0159] In the eighth hybrid main beam 100 of the present embodiment, second steel bars 127 are arranged parallel to and above the concrete portion 111. One end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at one end of the concrete portion 111, and the other end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at the other end of the concrete portion 111. Closed stirrups 116 are provided above all second steel bars 127.

[0160] The other structures of the eighth hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the fourth hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0161] Optionally, Figures 34-35 The ninth hybrid main beam 100 of the embodiment of the present application is shown. Figure 34 This is a structural diagram of the ninth hybrid main beam 100 provided in an embodiment of the present application. Figure 35 This is a schematic diagram of the main structure of the ninth hybrid main beam 100 provided in an embodiment of the present application; the differences from the fifth hybrid main beam 100 are mainly introduced here.

[0162] In the ninth hybrid main beam 100 of the present embodiment, second steel bars 127 are arranged parallel to and above the concrete portion 111. One end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at one end of the concrete portion 111, and the other end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at the other end of the concrete portion 111. Closed stirrups 116 are provided above all second steel bars 127.

[0163] The other structures of the ninth hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the fifth hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0164] Optionally, Figures 36-37 The tenth hybrid main beam 100 of the embodiment of the present application is shown. Figure 36 This is a structural diagram of the tenth hybrid main beam 100 provided in an embodiment of the present application. Figure 37 This is a schematic diagram of the main structure of the tenth hybrid main beam 100 provided in an embodiment of the present application; the differences from the sixth hybrid main beam 100 are mainly introduced here.

[0165] In the tenth hybrid main beam 100 of the present embodiment, second steel bars 127 are arranged parallel to and above the concrete portion 111. One end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at one end of the concrete portion 111, and the other end of the second steel bar 127 is connected to the first steel upper flange plate 1231 at the other end of the concrete portion 111. Closed stirrups 116 are provided above all second steel bars 127.

[0166] The other structures of the tenth hybrid main beam 100 of the embodiment of the present application are consistent with or similar to the sixth hybrid main beam 100 of the embodiment of the present application, and will not be repeated here.

[0167] Based on the same inventive concept, an embodiment of the present application further provides a frame structure applied to the interior structure of a building, comprising: a column 200, and a plurality of any hybrid main beams 100 provided in the above embodiments.

[0168] A plurality of hybrid main beams 100 are arranged in at least two directions in a horizontal plane, and respective steel ends 120 are connected to vertically extending columns 200 .

[0169] Figure 26 A schematic diagram of the structure of a hybrid main beam 100 connected to a column 200 is shown. In this embodiment, multiple hybrid main beams 100 are connected to the column 200, and the steel end portion 120 serves as a connection to the column 200. The frame structure provided in this embodiment includes any of the hybrid main beams 100 provided in the above embodiments. The implementation principles are similar and will not be repeated here.

[0170] Alternatively, as Figure 27 、 Figure 29 and Figure 31 As shown, the frame structure further includes: a composite plate 400, which is composed of a prefabricated plate and post-cast concrete erected on the concrete portion 111 of the hybrid main beam 100, and the post-cast concrete covers at least a portion of the hybrid main beam 100.

[0171] Alternatively, as Figure 28 、 Figure 30 and Figure 32As shown, the frame structure also includes: a floor deck 500, steel bars and post-cast concrete. The post-cast concrete covers at least part of the hybrid main beam 100. The top surface of the beam is provided with embedded parts, and the bolts of the embedded parts are connected together with the post-cast composite layer.

[0172] In some possible embodiments, such as Figure 30 As shown, the frame structure further includes a positioning member 210 , a portion of which is fixed to the column 200 , and an upper surface of another portion of the positioning member 210 is connected to a lower surface of the steel end portion 120 where the hybrid main beam 100 is connected to the column 200 .

[0173] A portion of the positioning member is fixed to the column, and an upper surface of another portion of the positioning member is connected to a lower surface of the steel end portion where the hybrid main beam is connected to the column.

[0174] In the embodiment of the present application, a portion of the positioning member 210 is fixed in the column 200 along the length of the hybrid main beam 100, while the remaining portion of the positioning member 210 extends out of the column 200. The upper surface of the positioning member 210 extending out of the column 200 is connected to the lower surface of the steel end portion 120 of the hybrid main beam 100. During the installation of the hybrid main beam 100 and the column 200, the positioning member 210 is used to position the hybrid main beam 100, facilitate installation of the hybrid main beam 100, and increase the shear resistance at the connection between the hybrid main beam 100 and the column 200.

[0175] By applying the embodiments of the present application, at least the following beneficial effects can be achieved: 1. In some embodiments, a hybrid main beam 100 is used instead of a steel main beam. The hybrid main beam 100 includes a main body 110 having a concrete portion 111 and steel end portions 120 located at each end of the concrete portion 111. The concrete portion 111 is cast from concrete, which reduces steel usage. Furthermore, the concrete portion 111 has high durability, fire resistance, and corrosion resistance, eliminating the need for additional fireproofing or waterproofing materials, thereby reducing material and construction costs for fireproofing or waterproofing. Furthermore, the steel web 121 of the steel end portions 120 is at least partially embedded within the concrete portion 111, providing shear resistance and ensuring a highly reliable connection between the steel end portions 120 and the concrete portion 111. Therefore, the steel end portions 120 are directly connected to the column 200 via connectors, eliminating the need for a corbel connection. This reduces the number of parts and welding required to connect the hybrid main beam 100 to the column 200, reducing construction complexity and improving efficiency.

[0176] 2. In some embodiments, a steel upper flange 123, a steel web 121, and a steel lower flange 124 are vertically arranged in sequence between the steel end plate 122 of the steel end portion 120 and the concrete portion 111. The steel upper flange 123, the steel web 121, and the steel lower flange 124 are each vertically connected to the steel end portion 120, and the steel upper flange 123 and the steel lower flange 124 are also vertically connected to the steel web 121, thereby increasing the load-bearing capacity of the steel end portion 120 and reducing its deadweight.

[0177] 3. In some embodiments, one end of each first steel bar 125 is embedded in the notch in a one-to-one correspondence, so that the first steel upper flange plate 1231 can horizontally limit the position of the first steel bar 125. Furthermore, the connection area between the first steel bar 125 and the first steel upper flange plate 1231 can be increased, thereby improving the connection stability between the first steel bar 125 and the first steel upper flange plate 1231.

[0178] 4. In some embodiments, a second upper steel flange plate 1232 is perpendicularly connected to the top of the steel web 121 and overlaps the concrete portion 111. This allows it to be superimposed with the subsequent load-bearing floor slab, forming a single integrated structure after concrete pouring. Furthermore, the connection between the second upper steel flange plate 1232 and the concrete portion 111 enhances the structural stability of the integrated structure formed by the steel end portion 120 and the main body 110.

[0179] 5. In some embodiments, the steel upper flange member 123 includes an interconnected first steel upper flange plate 1231, a connecting web 1233, and a second steel upper flange plate 1232. The H-shaped structure is connected above the steel web 121. The second steel upper flange plate 1232 is closer to the concrete portion 111 and connected to the steel web 121. The connecting web 1233 and the steel web 121 are connected to the upper and lower sides of the second steel upper flange plate 1232, respectively, and overlap vertically. When the floor slab is subsequently supported and concrete is poured, the steel end portion 120 is simultaneously poured into the concrete, so that the concrete fills the area between the first and second steel upper flange plates 1231, 1232 of the steel end portion 120. This further strengthens the connection between the steel end portion 120 and the concrete, thereby improving the structural stability of the integrated structure formed by the steel end portion 120 and the concrete.

[0180] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0181] The above is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application also fall within the protection scope of the embodiments of the present application.

Claims

1. A hybrid main beam, characterized in that: include: The main body is strip-shaped and includes a concrete part; a steel end portion, provided at at least one end of the concrete portion, comprising a steel web and a steel end plate both perpendicular to a horizontal plane; The steel web extends along the length direction of the concrete portion and is at least partially embedded in the concrete portion; The steel end plate is vertically connected to the end of the steel web and has at least one connection hole for a connecting member to pass through and be connected to a column.

2. The hybrid main beam according to claim 1, characterized in that: The steel end also includes: At least one steel upper flange member is located above the concrete portion, and one end of the steel upper flange member is connected to the top end of the steel end plate; The steel lower flange piece is connected to the lower side of the concrete portion, the bottom end of the steel web plate, and the bottom end of the steel end plate in sequence along a direction parallel to the concrete portion and away from the concrete portion.

3. The hybrid main beam according to claim 2, characterized in that: The steel upper flange member includes a first steel upper flange plate; The top end of the steel web protrudes from the concrete portion; the first steel upper flange plate is vertically connected to one side of the top end of the steel web and has a distance from the top surface of the concrete portion.

4. The hybrid main beam according to claim 2, characterized in that: The steel upper flange member includes a second steel upper flange plate; The second steel upper flange plate is vertically connected to one side of the top end of the steel web plate and overlapped on the concrete portion.

5. The hybrid main beam according to claim 4, characterized in that: The upper surface of at least one end of the concrete portion has a recessed area; The second steel upper flange plate is accommodated in the recessed area, and the upper surface thereof is flush with the portion of the concrete portion excluding the recessed area.

6. The hybrid main beam according to claim 2, characterized in that: The steel upper flange member comprises: a first steel upper flange plate and a second steel upper flange plate which are arranged in parallel in a vertical direction close to the concrete portion, and a connecting web plate vertically connected therebetween; The second steel upper flange plate is vertically connected to the top end of the steel web and overlapped on the concrete portion, and is located between the connecting web and the steel web.

7. The hybrid main beam according to claim 6, characterized in that: Include at least one of the following: The orthographic projections of the connecting web and the steel web on the horizontal plane at least partially overlap; The width of the first steel upper flange plate is smaller than the width of the steel lower flange member.

8. The hybrid main beam according to claim 2, characterized in that: The lower surface of at least one end of the concrete portion has a recessed area; The steel lower flange member is accommodated in the recessed area, and the lower surface thereof is flush with the portion of the concrete portion excluding the recessed area.

9. The hybrid main beam according to claim 2, characterized in that: Also includes: The first steel bar is arranged parallel to the top of the concrete part, one end of the first steel upper flange plate is connected to one end of the concrete part, and the other end faces the first steel upper flange plate at the other end of the concrete part.

10. The hybrid main beam according to claim 9, characterized in that: The portion of the first steel upper flange plate facing the steel upper flange member at the other end of the concrete portion has at least one notch; One end of each of the first steel bars is embedded in the notch in a one-to-one correspondence and connected to the first steel upper flange plate.

11. The hybrid main beam according to claim 9, characterized in that: One end of the first steel bar is connected to the lower surface and / or upper surface of the first steel upper flange plate.

12. The hybrid main beam according to claim 2, characterized in that: Also includes: The second steel bar is arranged parallel to the top of the concrete part, one end of the second steel bar is connected to the first steel upper flange plate at one end of the concrete part, and the other end of the second steel bar is connected to the first steel upper flange plate at the other end of the concrete part.

13. The hybrid main beam according to claim 12, characterized in that: Closed stirrups are arranged on the second steel bars.

14. The hybrid main beam according to claim 1, characterized in that: The main body also includes: a plurality of third steel bars, passing through the concrete portion along the length direction of the concrete portion; An orthographic projection of at least one of the third steel bars on the steel end plate falls into the connection hole.

15. The hybrid main beam according to claim 1, characterized in that: The main body also includes: first stirrups, perpendicular to the length direction of the concrete portion; at least a portion of the plurality of first stirrups are arranged in the concrete portion at intervals along the length direction of the concrete portion; The steel web is at least partially embedded in the concrete portion and passes through at least one area enclosed or partially enclosed by the first stirrups.

16. The hybrid main beam according to claim 15, characterized in that: The main body also includes: a plurality of fourth steel bars, arranged along the length direction of the concrete portion and passing through the area enclosed or partially enclosed by the plurality of first stirrups; An end portion of at least one of the fourth reinforcement bars is connected to the lower surface of the second steel upper flange plate of the steel end portion, and / or an end portion of at least one of the fourth reinforcement bars is connected to the upper surface of the steel lower flange member of the steel end portion.

17. The hybrid main beam according to claim 15, characterized in that: The top end of the first stirrup comprises a first hook portion and a second hook portion spaced apart in a horizontal direction; The first hook portion and the second hook portion both extend out of the concrete portion; Also includes at least one of the following: The first steel bars are all arranged between the first hook portion and the second hook portion; At least one of the first steel bars is inserted into the hook of the first hook portion; At least one of the first steel bars is passed through the hook of the second hook portion.

18. The hybrid main beam according to claim 1, characterized in that: The cross section of the concrete part of the main body is rectangular or I-shaped, or the cross sections of both ends of the concrete part of the main body are rectangular and the cross section of the middle part is I-shaped.

19. A frame structure, characterized in that: A structure used inside a building, comprising: a column, and a plurality of hybrid main beams according to any one of claims 1 to 18; A plurality of hybrid main beams are arranged in at least two directions in a horizontal plane, and respective steel ends are connected to the vertically extending columns.

20. The frame structure according to claim 19, characterized in that It also includes a positioning piece, a part of which is fixed on the column, and the upper surface of the other part of the positioning piece is connected to the lower surface of the steel end portion where the hybrid main beam is connected to the column.

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