Recombined bamboo-concrete composite beam structure applying angle steel and U-shaped steel

Abstract

The utility model provides a recombined bamboo-concrete composite beam structure applying angle steel and U-shaped steel, the structure comprises recombined bamboo 6, concrete 7 and a shear connector 8, the shear connector 8 comprises two semi-shear connectors 9 and two bolts 4, the two semi-shear connectors 9 are located on the two sides of the recombined bamboo 6 respectively, and the two bolts 4 are located on the two sides of the recombined bamboo 6 respectively. The two semi-shear connectors 9 are connected through the two bolts 4 and are fixed through the nuts 5; the thickness of the reconstituted bamboo is 50 mm, and the height of the two bolts 4 is 60 mm. According to the structure, the mechanical properties of the reconstituted bamboo wood and the concrete are fully exerted, and the problems that grooving construction of the bamboo-concrete composite beam is complex and the construction cost is high are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of civil engineering, in particular to the field of building of reconstituted bamboo-concrete composite beam structure using angle steel+U-shaped steel. BACKGROUND

[0002] With the rapid development of economy and the increase of construction demand, the demand for environmentally friendly building materials is also growing. Reconstituted bamboo is a kind of fiber reinforced composite material based on raw bamboo, which has almost no pollution to the environment during production process, and has the characteristics of uniform and dense structure, stable performance, strong durability, etc. Compared with traditional wood, it has better toughness and higher compressive and tensile strength, which can meet the performance requirements of different engineering materials. As a new type of building material, reconstituted bamboo is a renewable green material that helps reduce carbon emissions and has advantages in physical properties, environmental protection, prefabrication industrialization and material authenticity.

[0003] The combination of reconstituted bamboo and concrete beams improves the stiffness and flexibility of the overall structure. The introduction of reconstituted bamboo increases the elastic response of the structure to dynamic or cyclic loads, while concrete provides high compressive strength. This reconstituted bamboo-concrete composite beam structure using angle steel+U-shaped steel can fully utilize the advantages of both materials and solve the problem of insufficient stress performance of reconstituted bamboo beams.

[0004] However, there is a complex problem of slotting bamboo in the traditional reconstituted bamboo and concrete combination beam structure, which is a technical problem to be solved urgently. CONTENT OF THE INVENTION

[0005] In order to enhance the shear capacity of reconstituted bamboo-concrete composite beam, the present application designs a reconstituted bamboo-concrete composite beam structure using angle steel+U-shaped steel. The installation simplifies the complex problem of slotting bamboo in the traditional bamboo-concrete structure, making the construction more simple, not only reducing the construction difficulty, but also improving the overall economic benefit, prolonging the life cycle of the building. Such characteristics make it suitable for projects that pursue cost-effectiveness and structural lightweight.

[0006] The application provides a kind of reorganization bamboo-concrete composite beam structure of angle steel+U-shaped steel, the structure includes reorganization bamboo, concrete and shear connector, wherein, the shear connector includes two half shear connectors and 2 bolts, the two half shear connectors are located at the two sides of the reorganization bamboo respectively, the two half shear connectors are connected by the 2 bolts, and are fixed by nut;The thickness of the reorganization bamboo is 50mm, the height of the 2 bolts is 60mm;The half shear connector includes U-shaped steel, angle steel and bolt;The number of the U-shaped steel and the angle steel is 1, and the number of the bolt is 2;The U-shaped steel is integrally formed by one main rectangle and two side rectangle, the main rectangle of the U-shaped steel includes four holes, and the four holes are evenly distributed at the four corner positions of the main rectangle of the U-shaped steel;The angle steel is integrally formed by one main rectangle and one side rectangle, the main rectangle of the angle steel includes two holes, and the two holes are arranged in the direction of elongation with a spacing of 60mm;Two bolts pass through the two holes of the U-shaped steel and the two holes of the angle steel, so that the main rectangle of the U-shaped steel and the main rectangle of the angle steel are fixedly connected by two bolts, and the side rectangle of the U-shaped steel and the side rectangle of the angle steel are located on the same horizontal plane, and the height of the bolt is 20mm;The length of the concrete is greater than the thickness of the reorganization bamboo, and the long side direction of the concrete is perpendicular to the thickness direction of the reorganization bamboo, the side rectangle of the angle steel and the main rectangle of the angle steel are completely located in the concrete, the side rectangle of the U-shaped steel is completely located in the concrete, the upper half of the main rectangle of the U-shaped steel 1 is located in the concrete, and the bolt is completely located in the concrete.

[0007] Preferably, the long side of the main rectangle of the U-shaped steel is 120mm, the width is 100mm, and the thickness is 5mm, the long side of the side rectangle of the U-shaped steel is 120mm, the width is 15mm, and the thickness is 5mm, the two long sides of the main rectangle of the U-shaped steel are connected to the long sides of the two side rectangles of the U-shaped steel 1, and the main rectangle of the U-shaped steel and the side rectangle of the U-shaped steel are perpendicular to each other, and the two side rectangles of the U-shaped steel are parallel to each other.

[0008] Preferably, the long side of the main rectangle of the angle steel is 120mm, the width is 40mm, and the thickness is 5mm, the long side of the side rectangle of the angle steel is 120mm, the width is 15mm, and the thickness is 5mm, one long side of the main rectangle of the angle steel is connected to one long side of the side rectangle of the angle steel 2, and the main rectangle of the angle steel is perpendicular to the side rectangle of the angle steel.

[0009] Compared with the prior art, the application has the following advantages:

[0010] 1. Enhanced shear capacity: The original reconstituted bamboo-concrete composite beam serves as the main flexural member in the structure, but its strength and shear capacity are not fully utilized. In addition, the local stress of the steel plate bending part is improved, thereby increasing the shear capacity. This allows the reconstituted bamboo-concrete composite beam to better resist shear forces, improving the stability and durability of the overall structure.

[0011] 2. Good plasticity of bolts: The shear connector of the present application uses bolts during assembly and installation, which have good plasticity and can bear part of the load when the composite beam is subjected to shear failure, helping to increase the flexibility and durability of the structure. This improves the reliability of the composite beam, making it perform better under dynamic loads.

[0012] 3. Optimization of installation method: The shear connector of the present application simplifies the complex slotting problem of bamboo in traditional bamboo-concrete structures, and through bolt tensioning, the construction is simpler and the construction cost is reduced, prolonging the life cycle of the building. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 A schematic diagram of the U-shaped steel structure formed after the hole is opened.

[0015] Figure 2 A schematic diagram of the angle steel structure formed after the hole is opened.

[0016] Figure 3 A schematic diagram of the shear connector part composed of U-shaped steel and angle steel.

[0017] Figure 4 A schematic diagram of the shear connector structure composed of U-shaped steel and angle steel.

[0018] Figure 5 A schematic diagram of the reconstituted bamboo structure for assembling the shear connector.

[0019] Figure 6 A schematic diagram of the reconstituted bamboo-concrete composite structure.

[0020] Figure 7 A schematic diagram of the reconstituted bamboo-concrete composite beam cross section. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in detail below with reference to the drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are exemplary only, and are merely intended to explain the present application, and are not to be interpreted as limiting the present application.

[0022] In order to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Moreover, the terms "comprise", "comprising", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles, or devices that comprise a list of elements not only include those elements, but also include other elements not expressly listed, or further include elements inherent in such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprises one" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0024] In the description of the embodiments of the present application, the words "example" or "for example" are used to mean example, illustration, or description. Any embodiment or design scheme described as "example" or "for example" in the embodiments of the present application is not interpreted as more preferred or having more advantages than another embodiment or design scheme. The words "example" or "for example" are intended to present a relative concept in a clear manner.

[0025] In addition, "a plurality of" in the embodiments of the present application means two or more, and therefore "a plurality of" in the embodiments of the present application can also be understood as "at least two". "At least one" can be understood as one or more, for example, as one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included, for example, including at least one of A, B and C, then the included can be A, B, C, A and B, A and C, B and C, or A and B and C.

[0026] The application provides a reorganized bamboo-concrete composite beam structure applying angle steel+U-shaped steel, which can connect reorganized bamboo and concrete together to form an integral stress system through the design of the shear connector.

[0027] The application provides a reorganized bamboo-concrete composite beam structure applying angle steel+U-shaped steel, which can connect reorganized bamboo and concrete together to form an integral stress system through the design of the shear connector. Figure 4 and 6 The reorganized bamboo-concrete composite beam structure applying angle steel+U-shaped steel comprises reorganized bamboo 6, concrete 7 and a shear connector 8, wherein the shear connector 8 comprises U-shaped steel 1, angle steel 2, bolt 3 and bolt 4; the number of the U-shaped steel 1, the angle steel 2 and the bolt 4 is 2, and the number of the bolt 3 is 4.

[0028] As shown in Figure 1 The U-shaped steel 1 is made of low-carbon alloy steel material, and is integrally formed by a main rectangular and two side rectangles; the long side of the main rectangular is 120 mm, the width side is 100 mm, and the thickness is 5 mm; the long side of the side rectangle is 120 mm, the width side is 15 mm, and the thickness is 5 mm; the two long sides of the main rectangular are connected with the long sides of the two side rectangles, and the main rectangular and the side rectangle are perpendicular to each other, and the two side rectangles are parallel to each other; the main rectangular comprises four holes which are uniformly distributed at the four corner positions of the main rectangular, and the four holes are respectively 30 mm away from the two width sides of the main rectangular and 20 mm away from the long side of the main rectangular; and the two holes arranged in the elongated direction are 60 mm apart.

[0029] As shown in Figure 2 The angle steel 2 is made of low-carbon alloy steel material, and is integrally formed by a main rectangular and a side rectangle; the long side of the main rectangular is 120 mm, the width side is 40 mm, and the thickness is 5 mm; the long side of the side rectangle is 120 mm, the width side is 15 mm, and the thickness is 5 mm; one long side of the main rectangular is connected with one long side of the side rectangle, and the main rectangular is perpendicular to the side rectangle; the main rectangular comprises two holes which are arranged in the elongated direction with a spacing of 60 mm, and the two holes are respectively 30 mm away from the two width sides of the main rectangular and 20 mm away from the long side of the main rectangular.

[0030] The U-shaped steel 1 and the angle steel 2 are designed by cold bending process.

[0031] As shown in Figure 3The shear connector part schematic diagram shown is a combination of U-shaped steel and angle steel, namely a half shear connector 9, which comprises a U-shaped steel 1, an angle steel 2 and a bolt 3; the number of the U-shaped steel 1 and the angle steel 2 is 1, and the number of the bolt 3 is 2. The two holes in the U-shaped steel 1 in the long side direction are aligned with the two holes of the angle steel 2, and the size of the holes is 10 mm. Two bolts 3 pass through the two holes of the U-shaped steel 1 and the two holes of the angle steel 2, i.e. four holes, and are fixed by two nuts, so that the U-shaped steel 1 and the angle steel 2 are fixedly connected. The main rectangle of the U-shaped steel 1 and the main rectangle of the angle steel 2 are fixedly connected by two bolts 3, and the side rectangle of the U-shaped steel 1 and the side rectangle of the angle steel 2 are located on the same horizontal plane to form a half shear connector 9.

[0032] In the present application, the width of the side rectangle of the U-shaped steel 1 and the side rectangle of the angle steel 2 is the same and located on the same horizontal plane, so that they form a symmetrical relationship in the cross section, which is beneficial to reduce the stress concentration of the reconstituted bamboo-concrete composite beam structure.

[0033] Continuing to refer to Figure 4 shown, Figure 4 is a shear connector structure schematic diagram composed of U-shaped steel and angle steel. The shear connector 8 comprises two half shear connectors 9, which are spaced apart by a certain distance, and the distance is determined by the thickness of the reconstituted bamboo 6. The two half shear connectors 9 are connected by two bolts 4 and fixed by nuts 5. This design can increase the contact surface of the shear connector and the concrete and increase the stress of the concrete.

[0034] Specifically, the shear connector 8 comprises two U-shaped steels 1, two angle steels 2, two bolts 4 and four bolts 3, the diameter of the bolt 3 is 10 mm and the height is 20 mm, wherein one bolt 3 is connected through the two holes of the U-shaped steel 1 and the two holes of the angle steel 2, so that one U-shaped steel 1 and one angle steel 2 are tightly connected and fixed, forming a half shear connector 9, and the other bolt 3 can tightly connect and fix the other U-shaped steel 1 and the other angle steel 2, forming the other half shear connector 9, and the two half shear connectors 9 are symmetrically arranged. The two U-shaped steels are oppositely arranged and have a certain distance, and the distance depends on the thickness of the reconstituted bamboo 6. The two angle steels 2 are respectively located on the outer side of the two U-shaped steels 1. The two holes arranged in the direction of the extended edge of the two U-shaped steels 1 are aligned. Two bolts 4 pass through the two holes of the two U-shaped steels 1, and are fixed by nuts 5 after being fixed, and then are welded to prevent falling off. The two half shear connectors 9 are fixedly connected to form a complete shear connector 8, and the length of the bolt 4 is greater than the distance between the two U-shaped steels 1.

[0035] The bolt 3 and the bolt 4 can be high-strength external hexagonal M10 bolts.

[0036] Please refer toFigure 5 , Figure 5 Figure 6 is a schematic diagram of the reconstituted bamboo structure after assembling the shear connector. Two half shear connectors 9 are located on both sides of the reconstituted bamboo 6, two bolts 4 pass through the two half shear connectors 9 and the reconstituted bamboo 6, and high-quality epoxy resin glue is injected into the hole slot of the reconstituted bamboo beam to ensure the firm bonding of the shear connector 8. Specifically, a hole is drilled on the reconstituted bamboo beam 6 using an electric drill, two bolts 4 pass through the two holes of the main body rectangle of the two U-shaped steels 1 and penetrate the reconstituted bamboo 6, and the side edge rectangle of the U-shaped steel 1 is located in the reconstituted bamboo 6, so that the shear connector 8 is fixedly connected on both sides of the reconstituted bamboo 6, making it more firm, wherein the thickness of the reconstituted bamboo 6 is 50 mm, the diameter of the bolt 4 is 10 mm and the height is 60 mm. The cross section forms a symmetrical relationship, which is beneficial to reduce stress concentration, and the design can make the mechanical properties of the reconstituted bamboo-concrete composite beam structure better.

[0037] The processing method of the reconstituted bamboo 6 includes cutting the original bamboo into segments of a certain length and then splitting the segments into bamboo pieces. The bamboo pieces undergo a series of complex processing: first, soaking in hot water, then roasting on a flame, followed by rolling and drying for the first time. Next, the bamboo pieces are soaked in glue and dried for the second time to obtain dry and glued bamboo fiber pieces. The bamboo fiber pieces are laid in the full-grain direction, and a layer of expanded perlite is laid between the two adjacent layers. Finally, hot pressing is performed to form standard reconstituted bamboo 6.

[0038] A plurality of shear connectors 8 are included in the present application, and the plurality of shear connectors 8 are arranged at intervals in the long edge direction of the reconstituted bamboo 6, and are arranged at intervals of 100 mm. Taking the length of the reconstituted bamboo as 1000 mm as an example, the first shear connector 8 is 110 mm away from the edge of the reconstituted bamboo 6, the distance between the second shear connector 8 and the third shear connector 8 is 100 mm, the distance between the third shear connector 8 and the fourth shear connector 8 is 100, and the fourth shear connector 8 is 110 mm away from the edge of the reconstituted bamboo 6. The distance design can make the stress effect of the reconstituted bamboo-concrete composite beam structure better.

[0039] Please refer to Figure 6 and Figure 7 shown in Figure 5The length of the concrete 7 is greater than the thickness of the reconstituted bamboo 6, for example, the length of the concrete 7 is 150mm, and the thickness of the reconstituted bamboo 6 is 50mm. The long side direction of the concrete 7 is perpendicular to the thickness direction of the reconstituted bamboo 6, so that the long sides of the concrete 7 protrude from the two sides of the thickness of the reconstituted bamboo 6. Generally, the two sides of the concrete 7 are prone to cracking, the angle steel 2 of the shear connector 7 is completely in the concrete 7, the upper half of the U-shaped steel 1 is located in the concrete 7, and the lower half is located outside the two sides of the reconstituted bamboo 6. The shear connector 8 provided by the application can reduce the cracking of the concrete 7, so that the reconstituted bamboo 6 and the concrete 7 are better connected, and the mechanical effect is better.

[0040] Specifically, the side rectangle and the main body rectangle of the angle steel 2 are completely located in the concrete 7, and the structure increases the support of the angle steel 2 on the concrete 7 due to the pressure from top to bottom. One side rectangle of the U-shaped steel 1 is completely located in the concrete 7, the upper half of the main body rectangle of the U-shaped steel 1 is located in the concrete 7, the bolt 3 is completely located in the concrete 7, and the two angle steels 2 are symmetrically arranged in the concrete 7, which can increase the contact surface of the shear connector 8 and the concrete 7, and increase the stress of the concrete 7; the other side rectangle of the U-shaped steel 1 is completely located in the reconstituted bamboo 6, the lower half of the main body rectangle of the U-shaped steel 1 is located outside the reconstituted bamboo 6, and the bolt 4 passes through the two sides of the reconstituted bamboo 6 to connect the lower halves of the main body rectangles of the two U-shaped steels 1. The structure improves the shear capacity of the shear connector 8, reduces the stress concentration, and also improves the crack resistance of the concrete 7.

[0041] The shear connector in the application is located in the concrete and the reconstituted bamboo respectively. The special design of the structure can improve the shear capacity of the shear connector and the crack resistance of the concrete. The shear connector is wrapped by the concrete, which can increase the stress of the concrete. Through the design of the bolt 4 passing through the reconstituted bamboo, the two half shear connectors are connected to form a whole, which improves the overall performance of the reconstituted bamboo-concrete composite beam structure.

[0042] The application provides a shear connector design, which adopts a combination of U-shaped steel and angle steel, aiming to improve the stability of the overall structure and broaden its application range in engineering. This shear connector design provides a more feasible solution for the application of sustainable building materials, and has advantages such as environmental protection, excellent mechanical properties, significant economic benefits, convenient construction, multifunctionality, good durability, and strong adaptability, which provides technical support for the building industry to move towards a more environmentally friendly and sustainable future.

[0043] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, can make some more changes or modifications to the equivalent embodiments of the above disclosed technical content, as long as it does not deviate from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A reorganized bamboo-concrete composite beam structure using angle steel + U-shaped steel, characterized in that, The structure comprises reconstituted bamboo 6, concrete 7 and shear connector 8, wherein the shear connector 8 comprises two half shear connectors 9 and two bolts 4, the two half shear connectors 9 are respectively located on the two sides of the reconstituted bamboo 6, the two half shear connectors 9 are connected through the two bolts 4 and are fixed through nuts 5, the thickness of the reconstituted bamboo is 50mm, and the height of the two bolts 4 is 60mm. The half shear connector 9 comprises U-shaped steel 1, angle steel 2 and bolt 3, the number of the U-shaped steel 1 and the angle steel 2 is one, and the number of the bolt 3 is two, the U-shaped steel 1 is integrally formed by one main rectangle and two side rectangles, the main rectangle of the U-shaped steel 1 comprises four holes which are evenly distributed at the four corner positions of the main rectangle of the U-shaped steel 1, the angle steel 2 is integrally formed by one main rectangle and one side rectangle, the main rectangle of the angle steel 2 comprises two holes which are arranged in the direction of the length of the two holes with a spacing of 60mm, and the two bolts 3 pass through the two holes of the U-shaped steel 1 and the two holes of the angle steel 2, so that the main rectangle of the U-shaped steel 1 and the main rectangle of the angle steel 2 are fixedly connected through the two bolts 3, and the side rectangle of the U-shaped steel 1 and the side rectangle of the angle steel 2 are located on the same horizontal plane, and the height of the bolt 3 is 20mm. The length of the concrete 7 is greater than the thickness of the reconstituted bamboo 6, and the long side direction of the concrete 7 is perpendicular to the thickness direction of the reconstituted bamboo 6, wherein the side rectangle of the angle steel 2 and the main rectangle of the angle steel 2 are completely located in the concrete 7, the side rectangle of the U-shaped steel 1 is completely located in the concrete 7, the upper half of the main rectangle of the U-shaped steel 1 is located in the concrete 7, and the bolt 3 is completely located in the concrete 7.

2. The reorganized bamboo-concrete composite beam structure using angle steel + U-shaped steel according to claim 1, characterized in that, The long side of the main rectangle of the U-shaped steel 1 is 120mm, the width is 100mm, and the thickness is 5mm, the long side of the side rectangle of the U-shaped steel 1 is 120mm, the width is 15mm, and the thickness is 5mm, the two long sides of the main rectangle of the U-shaped steel 1 are connected with the long sides of the two side rectangles of the U-shaped steel 1 respectively, and the main rectangle of the U-shaped steel 1 and the side rectangle of the U-shaped steel 1 are perpendicular to each other, and the two side rectangles of the U-shaped steel 1 are parallel to each other.

3. The reorganized bamboo-concrete composite beam structure using angle steel + U-shaped steel according to claim 1, characterized in that, The long side of the main rectangle of the angle steel 2 is 120mm, the width is 40mm, and the thickness is 5mm, the long side of the side rectangle of the angle steel 2 is 120mm, the width is 15mm, and the thickness is 5mm, one long side of the main rectangle of the angle steel 2 is connected with one long side of the side rectangle of the angle steel 2, and the main rectangle of the angle steel 2 is perpendicular to the side rectangle of the angle steel 2.

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