A concrete i-beam composite beam structure and construction method

Abstract

The application is suitable for the field of building construction, and provides a concrete I-shaped composite beam structure and a construction method. The concrete I-shaped composite beam structure comprises: a middle I-beam section; a vertical pipe support assembly in steel structure, a plurality of which are arranged on opposite sides of the web of the middle I-beam section and are arranged along the length direction of the middle I-beam section, and the upper and lower ends of the vertical pipe support assembly are connected to the upper flange and the lower flange of the middle I-beam section, respectively; and an end shear beam section in concrete rectangular structure, which is integrally formed at the two ends of the middle I-beam section. The concrete I-shaped composite beam structure provided by the application can reduce the self weight of the large-span beam when applied to the large-span beam, make the stress more reasonable, improve the material utilization rate, and is relatively simple to construct.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of building construction, and particularly relates to a concrete I-shaped combined beam structure and a construction method. BACKGROUND

[0002] In large-span structure buildings, such as exhibition halls, gymnasiums, theaters, concert halls, exhibition centers and the like, due to the large span of the beam structure, prestressed beams, steel reinforced concrete beams or pure concrete beams are commonly used. However, the construction of prestressed beams is relatively complex and has a large self-weight, resulting in increased construction difficulty; the steel reinforced concrete beams have steel bones, and the construction is complex, the construction period is long and the cost is high; the commonly used pure concrete beams include rectangular concrete beams and I-shaped concrete beams, but the construction method of the large-span pure concrete rectangular beam is simple, but it has a large self-weight, and it is difficult to control the corresponding deflection and cracks; and the I-shaped concrete beam has poor torsional resistance and low end shear capacity compared with the rectangular beam, so the existing large-span structure beams have the defects of complex construction, large self-weight leading to difficult control of the corresponding deflection and cracks, or poor torsional resistance. SUMMARY

[0003] The concrete I-shaped combined beam structure provided by the present application aims to solve the problems of the existing single large-span beam structure, such as complex construction, large self-weight leading to difficult control of the corresponding deflection and cracks, or poor torsional resistance.

[0004] The present application is implemented as follows: a concrete I-shaped combined beam structure, comprising:

[0005] a middle I-beam section;

[0006] a vertical pipe support assembly, which is made of steel structure, has a plurality of quantities, is arranged on opposite sides of the web of the middle I-beam section and is arranged along the length direction of the middle I-beam section, and the upper and lower ends of the vertical pipe support assembly are connected to the upper flange and the lower flange of the middle I-beam section, respectively;

[0007] an end shear beam section, which is a concrete rectangular structure and is integrally formed at both ends of the middle I-beam section.

[0008] Further, the vertical pipe support assembly comprises vertical pipes and steel plates connected to the vertical pipes, respectively, the vertical pipes are arranged along the length direction of the middle I-beam, and the steel plates are fixed to the upper flange and the lower flange, respectively.

[0009] Further, the vertical pipes are round pipes or square pipes.

[0010] Further, the thickness of the upper flange is greater than or equal to the thickness of the upper plate of the combined beam.

[0011] Further, the cross-sectional width of the end shear beam section is the same as the flange width of the middle I-beam section.

[0012] Further, the end shear beam section is internally embedded with prestressed pipes.

[0013] Further, the end of the end shear beam section is also provided with prestressed anchors.

[0014] The application also provides a construction method of a concrete I-shaped composite beam structure, comprising the following steps:

[0015] S1: binding the bottom steel bars and web steel bars of the composite beam, the web including the web of the middle I-beam section and the web of the end shear beam section;

[0016] S2: supporting the formwork outside the bottom steel bars and web steel bars of the composite beam, and reserving notches in the formwork at the upper flange and lower flange of the middle I-beam section to accommodate the insertion of the stand pipe support assembly;

[0017] S3: embedding the two ends of the stand pipe support assembly into the notches respectively and then closing the remaining part of the notches around the steel stand pipe;

[0018] S4: pouring concrete after completing the binding of the top upper flange steel bars.

[0019] The application also provides a construction method of a concrete I-shaped composite beam structure, characterized by comprising the following steps:

[0020] S1: binding the bottom steel bars and web steel bars of the composite beam, the web including the web of the middle I-beam section and the web of the end shear beam section;

[0021] S2: fixing the steel plate of the stand pipe support assembly on the formwork and supporting the formwork, the steel plate being arranged below the upper flange and above the lower flange of the middle I-beam section and being flush with the surface of the flange;

[0022] S3: pouring concrete after completing the binding of the top upper flange steel bars;

[0023] S4: welding and fixing the two ends of the stand pipe to the steel plates located at the upper flange and lower flange after the concrete is solidified and the formwork is removed.

[0024] The beneficial effects achieved by the present application are that the combined beam is adopted, that is, the middle part adopts the middle I-beam section to greatly reduce the self weight of the beam, and then several vertical pipe support assemblies are arranged on the opposite sides of the web of the middle I-beam section, so that the structural stability of the middle I-beam section can be greatly improved to improve the torsional performance, thereby improving the stability of the overall structure of the beam, and the vertical pipe support assembly adopts a steel structure, which can further improve the resistance performance of the overall middle I-beam section, so that the stress performance of the overall beam can be ensured when the self weight of the beam is reduced and the middle I-beam section is adopted, in addition, the end shear beam section of the concrete rectangular structure is adopted at both ends of the middle I-beam section, so that the shear performance of both ends of the combined beam can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the external structure of a concrete I-shaped combined beam structure provided by the present application

[0026] Figure 2 is a sectional view of the middle I-beam section of a concrete I-shaped combined beam structure provided by the present application

[0027] Figure 3 is a side view of a concrete I-shaped combined beam structure provided by the present application

[0028] Figure 4 is a schematic diagram of the formwork installation of the middle I-beam section of a concrete I-shaped combined beam structure provided by the present application

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, middle I-beam section; 1a, upper flange; 1b, lower flange; 1c, web; 2, vertical pipe support assembly; 21, vertical pipe; 22, steel plate; 3, end shear beam section; 4, stud; 5, prestressed pipe; 6, formwork; 10, plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0032] Reference Figure 1The embodiment of the present application provides a concrete I-shaped combined beam structure, which comprises a middle I-shaped beam section 1, a vertical pipe supporting assembly 2 and an end shear beam section 3. The vertical pipe supporting assembly 2 is made of a steel structure to improve the stress performance of the vertical pipe supporting assembly 2. The vertical pipe supporting assembly 2 is arranged on opposite sides of the web 1c of the middle I-shaped beam section 1 and is spaced along the length direction of the middle I-shaped beam section 1. The upper and lower ends of the vertical pipe supporting assembly 2 are connected to the upper flange 1a and the lower flange 1b of the middle I-shaped beam section 1 respectively. The end shear beam section 3 is a concrete rectangular structure, and the end shear beam section 3 is integrally formed at the two ends of the middle I-shaped beam section 1.

[0033] By adopting the combined beam mode, that is, the middle I-shaped beam section 1 is adopted to greatly reduce the self weight of the beam, and the vertical pipe supporting assemblies 2 are arranged on opposite sides of the web 1c of the middle I-shaped beam section 1, the structural stability of the middle I-shaped beam section 1 can be greatly improved to improve the torsional performance, so that the stability of the overall beam structure is improved. The vertical pipe supporting assembly 2 is made of a steel structure, so that the resistance performance of the overall middle I-shaped beam section 1 is further improved. When the middle I-shaped beam section 1 is adopted to reduce the self weight of the beam, the stress performance of the overall beam can be ensured. In addition, the end shear beam section 3 made of a concrete rectangular structure is arranged at the two ends of the middle I-shaped beam section 1, so that the shear performance of the two ends of the combined beam can be improved.

[0034] The concrete I-shaped combined beam structure provided by the present application can reduce the self weight of the large-span beam when applied to the large-span beam, make the stress more reasonable, improve the material utilization rate, and is relatively simple to construct.

[0035] Referring to Figure 2 Specifically, the vertical pipe supporting assembly 2 comprises vertical pipes 21 and steel plates 22 connected to the vertical pipes 21 respectively. The vertical pipes 21 are spaced along the length direction of the middle I-shaped beam. The steel plates 22 are fixed to the upper flange 1a and the lower flange 1b respectively. Specifically, the steel plates 22 can be anchored to the concrete of the upper flange 1a or the lower flange 1b by means of the bolts 4. The steel plates 22 can not only facilitate the connection between the vertical pipes 21 and the concrete, but also increase the area of the end of the vertical pipe 21 in contact with the concrete, so that the force on the vertical pipe 21 can be more smoothly transmitted to the concrete, and the connection stability of the vertical pipe 21 and the concrete is further improved.

[0036] Specifically, the steel plates 22 and the vertical pipes 21 can be connected by welding, so that the connection between the two is more stable.

[0037] In the embodiment, the vertical pipes 21 can be round pipes or square pipes. The round pipes and the square pipes are existing products and can be mass-produced. Only the appropriate diameter is selected according to the actual stress and the required height is cut to realize the installation. The vertical pipes 21 do not need to be formed by supporting and pouring, so that the supporting process is saved and the construction efficiency is improved.

[0038] Referring to Figure 2 , Figure 4 , further, the thickness of the upper flange 1a is greater than or equal to the thickness of the slab 10 above the composite beam. When the thickness of the upper flange 1a is equal to the thickness of the slab 10 above the composite beam (see Figure 2 ), thus satisfying the compression performance of the composite beam, the slab 10 on the beam can meet the formwork requirements of the upper flange 1a at the same time during the formwork process of the slab 10 on the beam, without the need for additional formwork for the upper flange 1a, improving the convenience of construction; when the thickness of the upper flange 1a is greater than the thickness of the slab 10 above the composite beam (see Figure 4 ), the cross section of the upper compression zone concrete of the middle I-beam section 1 can be increased, thereby further increasing the stress performance of the composite beam.

[0039] In the embodiment, the thicknesses of the upper flange 1a and the lower flange 1b of the middle I-beam section 1 can be set according to actual stress conditions.

[0040] Referring to Figure 1 , further, the cross-sectional width of the end shear beam section 3 is the same as the flange width of the middle I-beam section 1. Thus, the performance of the end shear beam section 3 is adapted to the performance of the middle I-beam section 1, so that the stress performance of the composite beam is optimized.

[0041] Referring to Figure 3 , further, the end shear beam section 3 is internally pre-buried with a prestressed pipe 5. Thus, an operable space for prestress application work can be reserved inside the composite beam after the construction of the composite beam is completed, and when actually needed, prestress application work can be performed on the composite beam, thereby balancing the negative bending moment generated in the end shear beam section 3, achieving the purpose of reducing cracking of the end shear beam section 3 and reducing the deflection of the entire composite beam.

[0042] Specifically, the prestressed pipe 5 can be pre-buried by a corrugated pipe.

[0043] Further, the end of the end shear beam section 3 is also provided with a prestressed anchor (not shown in the figure). Thus, favorable conditions can be provided for the subsequent tensioning of the steel strand during prestress application work.

[0044] Further, an anchor plate (not shown in the figure) can also be pre-buried in the end shear beam section 3 to facilitate the subsequent tensioning of the steel strand.

[0045] Referring to Figure 4 , the embodiment of the present application also provides a construction method of a concrete I-shaped composite beam structure, comprising the following steps:

[0046] S1: binding the bottom steel bars and web steel bars of the composite beam, the web including the web 1c of the middle I-beam section 1 and the web of the end shear beam section 3;

[0047] S2: Outside the bottom reinforcement and web reinforcement of the composite beam, the formwork 6 at the upper flange 1a and the lower flange 1b of the middle I-beam segment 1 is reserved with an opening (not shown in the figure) which can accommodate the penetration of the riser support assembly 2;

[0048] The opening is set to facilitate the penetration of the two ends of the riser support assembly 2 into the interior of the composite beam through the formwork 6 before pouring the concrete, so that the two ends of the riser support assembly 2 can be integrated with the concrete when pouring the concrete.

[0049] S3: After embedding the two ends of the riser support assembly 2 into the openings respectively, the remaining part of the steel structure riser 21 around the openings is closed;

[0050] Specifically, small pieces of formwork 6 can be used to close the space between the opening profile and the riser support assembly 2, so that the formwork 6 of the concrete composite beam forms a complete whole, and when the formwork 6 is removed, the small pieces of formwork 6 can be removed again, or the formwork 6 can be directly damaged to remove it.

[0051] S4: After binding the top upper flange 1a reinforcement, pouring the concrete.

[0052] In addition, the application also provides another construction method of a concrete I-shaped composite beam structure, comprising the following steps:

[0053] S1: Binding the bottom reinforcement and web reinforcement of the composite beam, the web includes the web of the middle I-beam segment and the web of the end shear beam segment;

[0054] S2: Fixing the steel plate of the riser support assembly on the formwork and supporting the formwork, the steel plate is located below the upper flange and above the lower flange of the middle I-beam segment and is arranged flush with the surface of the flange;

[0055] In this way, it is ensured that after pouring the concrete, the steel plate can be exposed outside the concrete to facilitate subsequent welding connection with the riser, so as to avoid damaging the surface of the concrete when the steel plate and the riser are connected, thereby affecting the structure and quality of the composite beam.

[0056] S3: After binding the top upper flange reinforcement, pouring the concrete;

[0057] S4: After the concrete is solidified and the formwork is removed, the two ends of the riser are welded and fixed with the steel plates located on the upper flange and the lower flange respectively.

[0058] The construction method of the concrete I-shaped composite beam structure provided by the application can improve the installation convenience of the riser support assembly and reduce the installation difficulty, thereby improving the overall construction convenience.

[0059] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A concrete I-beam composite beam structure, characterized in that, include: Central I-beam segment; The riser support assembly, made of steel, is arranged on both sides of the web of the middle I-beam segment and spaced apart along the length of the middle I-beam segment. The upper and lower ends of the riser support assembly are respectively connected to the upper flange and lower flange of the middle I-beam segment. The end shear beam segment is a rectangular concrete structure, integrally formed at both ends of the middle I-beam segment; The riser support assembly includes a riser and steel plates respectively connected to the riser. The risers are spaced apart along the length of the central I-beam, and the steel plates are respectively fixed to the upper flange and the lower flange. The cross-sectional width of the end shear beam segment is the same as the flange width of the middle I-beam segment; The end shear beam segment has pre-embedded prestressed ducts inside.

2. The concrete I-beam composite structure as described in claim 1, characterized in that, The riser is either a round or square tube.

3. The concrete I-beam composite structure as described in claim 1, characterized in that, The thickness of the upper flange is greater than or equal to the thickness of the upper plate of the composite beam.

4. The concrete I-beam composite structure as described in claim 1, characterized in that, The end of the shear-resistant beam segment is also provided with a prestressed anchor.

5. A construction method for a concrete I-beam composite structure, applied to the concrete I-beam composite structure as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: Tie the bottom reinforcement and web reinforcement of the composite beam. The web includes the web of the middle I-beam segment and the web of the end shear beam segment. S2: Formwork is erected outside the bottom reinforcement and web reinforcement of the composite beam, and openings are reserved in the formwork at the upper and lower flanges of the middle I-beam segment to accommodate the insertion of the riser support components. S3: After inserting both ends of the riser support component into the notch, seal the remaining notch around the steel structure riser. S4: After completing the binding of the top upper flange reinforcement, pour concrete.

6. A construction method for a concrete I-beam composite structure, applied to the concrete I-beam composite structure as described in any one of claims 1-4, characterized in that, Includes the following steps; S1: Tie the bottom reinforcement and web reinforcement of the composite beam. The web includes the web of the middle I-beam segment and the web of the end shear beam segment. S2: Fix the steel plate of the riser support assembly to the template and support the template. The steel plate is located below the upper flange and above the lower flange of the middle I-beam section and is flush with the surface of the flange. S3: After completing the binding of the top upper flange reinforcement, pour concrete; S4: After the concrete has solidified and the formwork is removed, the two ends of the riser are welded and fixed to the steel plates located on the upper and lower flanges, respectively.

Images