CN219808584U

CN219808584U - Frame beam

Info

Publication number: CN219808584U
Application number: CN202320707475.9U
Authority: CN
Inventors: 傅银新
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-10-10
Anticipated expiration: 2033-04-03

Abstract

The utility model provides a frame beam, wherein a combined structure beam part is arranged at the section with the largest positive bending moment of the frame beam, and is provided with a zone I and a zone II along the bearing direction of the frame beam; the first area is a tensile area of a combined structure, and the tensile area of the combined structure adopts a steel structural member as a main stress member; the II area is a combined structure compression-resistant area, and the combined structure compression-resistant area adopts a concrete member as a main stress member. The frame beam provided by the utility model can fully exert the advantages of the beam part of the combined structure, and meanwhile, the disadvantages of complex stress, difficult construction and the like of the beam part of the combined structure at the joint of the beam and the column are avoided; the method has the advantages of stronger bending resistance, strong bearing capacity, resource conservation and remarkable economic benefit, and can improve the layer height utilization rate of the building.

Description

Frame beam

Technical Field

The utility model belongs to the technical field of concrete structures and steel and concrete combined structures, and particularly relates to a frame beam.

Background

The traditional steel and concrete combined structural beam has the characteristics of reasonable stress (the concrete is mainly stressed, and the steel beam is mainly pulled), obviously improved strength and rigidity compared with the traditional reinforced concrete beam, can save a large amount of steel and can reduce the self weight of the structure. However, in the field of house construction, the steel and concrete composite structure beam is rarely used except for individual scenes (such as a large-span area traditional reinforced concrete beam cannot be qualified), and the reason is that the traditional steel and concrete composite structure beam needs to be perforated according to actual conditions when a steel beam passes through a beam column node core area and collides with column vertical reinforced steel bars, meanwhile, the horizontal stirrup encryption in the beam column node core area collides with a steel beam web plate and cannot even be constructed, the existence of the steel beam influences the vibration of concrete, and the construction quality is difficult to guarantee.

The steel beam structure part of the traditional steel and concrete combined structure beam traverses the whole frame beam, the concrete is pressed in the positive bending moment section, and the steel beam is pulled, so that the stress is reasonable; in the hogging moment section, the concrete is pulled and the steel beam is pressed, so that the stress is unreasonable. The traditional steel and concrete combined structure has good economic value in the positive bending moment section of the frame beam as a whole, and the traditional steel and concrete combined structure has almost the same stress (the upper concrete is pulled and the bearing capacity is mainly provided by the steel bars arranged in the concrete) compared with the common reinforced concrete frame beam in the negative bending moment section, but the construction cost is higher, the construction is complex, and the construction quality is difficult to guarantee.

Based on the technical problems existing in the frame beams, no relevant solution exists yet; there is therefore an urgent need to seek an effective solution to the above problems.

Disclosure of Invention

The utility model aims to solve the problems of unreasonable structural design and inconvenient construction of the existing frame beam.

The utility model provides a frame beam, wherein a combined structure beam part is arranged at the maximum section of positive bending moment of the frame beam, and is provided with a zone I and a zone II from bottom to top along the bearing direction of the frame beam; the first area is a tensile area of a combined structure, and the tensile area of the combined structure adopts a steel structural member as a main stress member; the II area is a composite structure compression resistant area, and the composite structure compression resistant area adopts a concrete member as a main stress member.

Further alternatively, the tensile region of the composite structure is connected to the concrete member of the compressive region of the composite structure by means of a bond between the steel and the concrete and an auxiliary mechanical anchoring.

Further optionally, the concrete member of the compressive region of the composite structure is provided with stirrups for providing a partial shear load capacity of the beam portion of the composite structure; the steel structural members of the composite structural tensile region include webs to provide shear load bearing capacity to the remainder of the composite structural beam portion.

Further alternatively, the web of the steel structural member may be provided with a wire via on the premise that the shear capacity meets the requirements.

Still alternatively, the frame beam is further provided with iii regions at two ends of the beam portion of the combined structure, the iii regions are reinforced concrete regions, the reinforced concrete regions form a reinforced concrete beam portion, a beam column is arranged at the bottom of the reinforced concrete beam portion, and the reinforced concrete beam portion is used for providing a hogging moment and a shearing force of the root of the beam column.

Further alternatively, the steel structural member is provided with a tensile steel member, one end of which is anchored into the reinforced concrete region of the iii region and at the same time provided with a mechanical anchoring structure.

Further optionally, a sealing plate is arranged at the interface between the reinforced concrete area and the combined structure beam part, and is used for strengthening the abrupt change part of the interface between the reinforced concrete area and the combined structure beam part, and simultaneously providing a beam inner template for the reinforced concrete area.

Further alternatively, the connection area between the reinforced concrete area and the beam part of the combined structure adopts a beam stirrup encryption structure.

Compared with the prior art, the utility model has the following main beneficial effects: the advantages of the beam part of the combined structure can be fully exerted, and the disadvantages of complex stress, difficult construction and the like of the beam part of the combined structure at the joint of the beam and the column are avoided; the beam part of the steel and concrete combined structure has stronger bending resistance, so that the bearing capacity of the frame beam can be improved after the concrete frame is partially replaced, and smaller beam height can be adopted under the same bearing capacity, thereby saving resources and having remarkable economic benefit; the floor height is saved, and the civil construction cost is reduced; the utility model can partially replace the common reinforced concrete frame beam structure according to the needs and has wide application scene.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.

Fig. 1 and fig. 2 are schematic structural views of an embodiment of a frame beam provided by the utility model;

FIG. 3a is a cross-sectional view taken at A-A of FIG. 2;

FIG. 3B is a cross-sectional view at B-B in FIG. 2;

fig. 4a is a schematic structural diagram of a side view embodiment of a frame beam provided by the present utility model;

fig. 4b is a schematic top view distribution diagram of an embodiment of a frame beam provided by the present utility model;

fig. 4c is a schematic distribution diagram of a bottom view of a frame beam according to an embodiment of the present utility model;

FIG. 5a is a schematic view of a shear force distribution of a frame beam according to an embodiment of the present utility model;

fig. 5b is a schematic diagram illustrating distribution of a bending moment of a frame beam according to an embodiment of the present utility model;

in the figure:

1-a composite structural beam portion; 11-I region; 111-web; 112-tensile steel member; 113-reinforcing plates; 12-II region; 121-stirrups; 13-mechanical anchors;

21-iii region; 22-closing plate; 23-beam stirrups; 3-beam columns.

Detailed Description

Other advantages and advantages of the present utility model will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

In the prior art, the steel beam structure part of the traditional steel and concrete combined structure beam part traverses the whole frame beam, the concrete is pressed in the positive bending moment section, and the steel beam is pulled, so that the stress is reasonable; the concrete is pulled in the hogging moment section, the steel beam is pressed, and the stress is unreasonable; the traditional steel and concrete combined structure has good economic value in the positive bending moment section of the frame beam as a whole, and the traditional steel and concrete combined structure in the negative bending moment section has almost the same stress as the common reinforced concrete frame beam, but has higher manufacturing cost, complex construction and difficult guarantee of construction quality;

the utility model designs the components according to the principle that the reinforced concrete part resists compression and the steel structure part resists tension. The design fully considers the bending moment characteristics and the shearing force characteristics of different areas of the frame beam, and determines the arrangement range of the combined structure beam part in the frame beam according to the arrangement principle that the combined structure beam part replaces the section with the frame beam with larger positive bending moment and smaller shearing force, so that each section of the combined structure beam has adaptive bending moment and shearing force bearing capacity.

The utility model creatively proposes that a combined structure beam part is arranged at the positive bending moment maximum section of the frame beam, the combined structure beam part is provided with a zone I and a zone II, and the zone I and the zone II are arranged from bottom to top along the bearing direction of the frame beam; the first area is a tensile area of a combined structure, and the tensile area of the combined structure adopts a steel structural member as a main stress member; the II area is a combined structure compression-resistant area, and the combined structure compression-resistant area adopts a concrete member as a main stress member; according to the stress characteristics of the frame beam, the section with the largest positive bending moment and relatively smaller shearing force of the frame beam is replaced by a combined structure beam part; the beam part of the steel structure and concrete combined structure can bear larger positive bending moment, and better economic benefit is obtained.

The present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 3a, 3b, 5a and 3b, the frame beam provided in this embodiment is provided with a section of a combined structural beam portion 1, the combined structural beam portion 1 is located at a positive bending moment maximum section of the frame beam, and the combined structural beam portion 1 is divided into two regions according to the stress characteristics of the combined structural beam portion 1, and the two regions are respectively made of different materials and respectively bear different forces; specifically, the composite structural beam portion 1 includes a first region 11 and a second region 12, the first region 11 and the second region 12 are arranged in order from bottom to top along the bearing direction of the frame beam, and the extending direction of the first region 11 and the extending direction of the second region 12 are both the same as the extending direction of the frame beam; the I area 11 is a tensile area of the combined structure, and the tensile area of the combined structure is designed to adopt a steel structural member as a main tension member by utilizing the characteristic that the steel structure can bear tension; the specific structure of the steel structural member is not limited, and an i-shaped structure is preferable; the II area 12 is a compressive area of the combined structure, and the compressive area of the combined structure is designed to adopt a concrete member as a main compressive member by utilizing the characteristic that concrete can bear pressure; the extension length of the zone I11 and the extension length of the zone II 12 can be designed according to the extension length of the actual positive bending moment maximum section; the bearing heights of the zone I11 and the zone II 12 are designed according to the stress characteristics of the frame beams; in this way, the stress distribution of the composite structural beam part 1 is optimized, and the bearing capacity strength of the composite structural beam part 1 is improved.

Aiming at the problem that the connection of the steel structural member and the concrete member can not reliably influence the bearing capacity of the combined structural beam part 1, the embodiment provides that the steel structural member and the concrete member are connected by the bonding force of steel and concrete and the fixing mode of the auxiliary mechanical anchor 13; specifically, one end of the mechanical anchor 13 is fixedly connected with the steel structural member, and the other end extends into the concrete member and is fixedly connected with the concrete member; according to actual needs, the number of the mechanical anchors 13 can be adjusted or the contact area between the mechanical anchors 13 and the concrete member can be adjusted; on one hand, the steel structural member and the concrete member can be reliably connected, and on the other hand, the force transmission is realized through the contact of the steel structural member and the concrete member and the mechanical anchor 13, so that the steel structural member is ensured to bear the tensile force and the concrete member is ensured to bear the pressure force; the connection strength between the steel structural member and the concrete member is improved, and the compressive strength and the tensile strength of the combined structural beam part 1 are ensured;

in manufacturing the frame beam of the present utility model, the steel structural members of the composite structural beam portion 1 are prefabricated in a factory, and the steel structural members are mounted at corresponding positions in the process of formwork bracing of the frame beam.

Aiming at the problems of small shearing bearing capacity and unreasonable shearing bearing capacity distribution of the combined structural beam part 1, the embodiment provides that the stirrups 121 are arranged on the concrete member of the compressive region of the combined structure, so that the partial shearing bearing capacity of the combined structural beam part 1 can be provided; the number and position distribution of the stirrups 121 can be adjusted according to actual needs; the steel structural members of the composite structural tensile region include webs 111 that provide shear load bearing capacity to the remainder of the composite structural beam portion 1; the thickness of the web 111 can be adjusted according to actual needs; in this way, by combining the functions of the stirrup 121 and the web 111, the shearing load bearing capacity is dispersed at the stirrup 121 and the web 111, and the shearing load bearing capacity of the combined structural beam part 1 is improved; in addition, the web 111 of the steel structural member may be provided with a wire passing hole on the premise that the shearing bearing capacity meets the requirement, and the wire passing hole may be used for penetrating and fixing a pipeline.

Aiming at the problem that the bending moment of the combined structural beam part 1 is large and the shearing force is small, the embodiment provides that the bottom of the web 111 of the steel structural member is provided with the reinforcing plate 113, so that the bending bearing capacity of the connecting part of the steel structural member and the concrete can be improved.

Further, as shown in fig. 2, fig. 4a, fig. 4b and fig. 4c, the frame beam is further provided with iii regions 21 on both sides of the composite structural beam portion 1, the iii regions 21 are reinforced concrete regions, and the reinforced concrete regions form a reinforced concrete beam portion; the bottom of the reinforced concrete beam part is provided with a beam column 3, and the reinforced concrete beam part is used for providing a hogging moment and a shearing force at the root of the beam column 3;

therefore, the reinforced concrete area is arranged in the section with the minimum positive bending moment of the frame beam, steel structural members are reduced, the manufacturing cost of the frame beam is reduced, the construction process is simplified, and the construction quality is improved.

Specifically, the present embodiment proposes that the steel structural member is provided with a tensile steel member 112 at the connection region of the reinforced concrete beam portion and the composite structural beam portion 1, and that one end of the tensile steel member 112 is anchored into the reinforced concrete region of the iii region 21 and is simultaneously provided with a mechanical anchoring structure; the combined structural beam part 1 is directly connected with the reinforced concrete area at the position with smaller bending moment, so that the connection strength of the steel structural member and the reinforced concrete area is improved, and the compressive strength of the connection position of the steel structural member and the reinforced concrete area is improved;

in addition, when the adhesion force of the steel structural member to the concrete and the auxiliary mechanical anchoring force are greater than the tensile force (extraction force) of the tension member of the composite structural beam portion 1, the composite structural beam portion 1 and the reinforced concrete beam region can be easily integrated.

Preferably, in combination with the above, as shown in fig. 3a and 3b, the present embodiment proposes that the interface of the reinforced concrete area and the composite structural beam portion 1 is provided with a closing plate 22; in this way, the sealing plate 22 can strengthen the abrupt change part of the interface between the reinforced concrete area and the beam part 1 of the combined structure, and simultaneously provide a beam inner template for the reinforced concrete area, thereby facilitating construction and pouring.

Aiming at the problems of high construction requirements and complex construction process of the frame beam, the embodiment provides that the construction measures of common reinforced concrete are adopted in the connection area of the reinforced concrete and the beam column 3, the construction is not different from that of the common reinforced concrete frame beam, no special requirements are imposed on construction teams, and the advantages of strong shearing capacity and simple construction of the traditional reinforced concrete member are fully exerted.

In addition, the embodiment also provides that the connection area of the reinforced concrete area and the beam part of the combined structure adopts a beam stirrup encryption structure so as to improve the strength of the connection area of the reinforced concrete area and the beam part 1 of the combined structure.

In conclusion, the frame beam provided by the utility model can fully exert the advantages of the beam part of the combined structure, and meanwhile, the disadvantages of complex stress, difficult construction and the like of the beam part of the combined structure during beam column connection are avoided; the beam part of the steel and concrete combined structure has stronger bending resistance, so that the bearing capacity of the frame beam can be improved after the concrete frame is partially replaced, and smaller beam height can be adopted under the same bearing capacity, thereby saving resources and having remarkable economic benefit; the floor height is saved, and the civil construction cost is reduced; the utility model can partially replace the common reinforced concrete frame beam structure according to the needs and has wide application scene.

Claims

1. A frame beam, characterized in that: the positive bending moment maximum section of the frame beam is provided with a combined structure beam part, and the combined structure beam part is provided with a zone I and a zone II from bottom to top along the bearing direction of the frame beam; the first area is a tensile area of a combined structure, and the tensile area of the combined structure adopts a steel structural member as a main stress member; the II area is a combined structure compression-resistant area, and the combined structure compression-resistant area adopts a concrete member as a main stress member;

the steel structural member is of an I-shaped structure and comprises a web plate and a reinforcing plate, wherein the web plate is used for providing partial shear bearing capacity of the combined structural beam part; the reinforcing plate is arranged at the bottom of the web plate and is used for providing partial bending resistance bearing capacity for connecting the steel structural member and the concrete member.

2. The frame beam of claim 1, wherein: the tensile area of the combined structure is connected with the concrete member of the compressive area of the combined structure through the bonding force of steel and concrete and an auxiliary mechanical anchoring mode.

3. The frame beam of claim 1, wherein: the concrete members of the composite structural compression resistant area are provided with stirrups for providing a partial shear load capacity of the composite structural beam portion.

4. The frame beam of claim 1, wherein: the web plate of the steel structural member can be provided with a wire passing hole on the premise that the shearing bearing capacity meets the requirement.

5. A frame beam according to any one of claims 1-4, characterized in that: the frame beam is in the both sides of integrated configuration beam part still are equipped with III district, III district is reinforced concrete region, reinforced concrete region constitutes reinforced concrete beam part, reinforced concrete beam part's bottom is provided with the beam column, just reinforced concrete beam part is used for providing the hogging moment and the shear force of beam column root.

6. The frame beam of claim 5, wherein: the steel structural member is provided with a tensile steel member, one end of which is anchored into the reinforced concrete area of the III region and is simultaneously provided with a mechanical anchoring structure.

7. The frame beam of claim 5, wherein: and the interface between the reinforced concrete area and the combined structure beam part is provided with a sealing plate, and the sealing plate is used for strengthening the abrupt change part of the interface between the reinforced concrete area and the combined structure beam part and simultaneously providing a beam inner template for the reinforced concrete area.

8. The frame beam of claim 5, wherein: and the connection area of the reinforced concrete area and the beam part of the combined structure adopts a beam stirrup encryption structure.