Prestressed concrete beam with special cross section

Abstract

The application relates to a prestressed special-shaped section concrete beam and relates to the technical field of concrete beams, which comprises a beam body, wherein a U-shaped reinforcing plate is arranged at the bottom of the beam body. The U-shaped reinforcing plate can form a wrapping type support for the bottom of the beam body. When a first knob is rotated, a first bolt rotates in a first threaded cap and drives a first fastening plate to move close to the side surface of the beam body until the first fastening plate is tightly combined with the side wall of the beam body, so that the U-shaped reinforcing plate can be fixed on both sides of the beam body. Meanwhile, when a second knob is rotated, a second bolt moves axially along a second threaded cap, and a second fastening plate is urged to tightly press the bottom of the beam body upwards, so that the connection stability of the U-shaped reinforcing plate and the beam body is further improved. The double fastening structure can not only effectively disperse the load borne by the beam body, but also form an upward supporting force on the middle part of the beam body through the second fastening plate, so that the depression tendency of the beam body in the long-term use process is inhibited, and the durability of the reinforcing effect can be improved.

Description

Technical Field

[0001] This application relates to concrete beams, and more particularly to a prestressed concrete beam with an irregular cross-section. Background Technology

[0002] Concrete frame structures typically include supporting structures such as columns and beams. After long-term use or when subjected to heavy loads, beams may develop cracks at the beam end supports and at the bottom of the beam mid-span due to insufficient load-bearing capacity and excessive deformation. In order to ensure the safety of the building, the beams need to be reinforced.

[0003] When reinforcing concrete beams, concrete is usually applied around the beam to enhance its load-bearing capacity. However, the beam lacks an additional anti-dent structure in the middle, which can easily lead to denting over time, thus affecting the reinforcement effect. To address this issue, a prestressed irregular-section concrete beam is proposed. Utility Model Content

[0004] The purpose of this application is to provide a prestressed irregular section concrete beam with advantages such as reinforcement function, which solves the problem that traditional concrete beams lack anti-dent structure in the middle after reinforcement and are prone to denting after long-term use, thus affecting the reinforcement effect.

[0005] The technical solution for a prestressed irregular section concrete beam provided in this application is as follows: it includes a beam body, and a U-shaped reinforcing plate is installed and connected to the bottom of the beam body;

[0006] The U-shaped reinforcing plate is fixedly connected to multiple first threaded caps on both sides. The first threaded caps are threaded with first bolts inside. The first bolts are fixedly connected to a first knob and a first fastening plate at both ends. The bottom of the U-shaped reinforcing plate is fixedly connected to multiple second threaded caps. The second threaded caps are threaded with second bolts inside. The top and bottom ends of the second bolts are fixedly connected to a second fastening plate and a second knob, respectively.

[0007] By adopting the above technical solution and setting up a U-shaped reinforcing plate, a wrap-around support can be formed at the bottom of the beam. When the first knob is turned, the first bolt rotates inside the first threaded cap and drives the first fastening plate to move closer to the side of the beam until it is tightly fitted with the side wall of the beam. This can fix the U-shaped reinforcing plate on both sides of the beam. At the same time, turning the second knob can move the second bolt along the axial direction of the second threaded cap, causing the second fastening plate to press upward against the bottom of the beam, further enhancing the connection stability between the U-shaped reinforcing plate and the beam. This double fastening structure can not only effectively distribute the load on the beam, but also form an upward supporting force on the middle of the beam through the second fastening plate, thereby suppressing the tendency of the beam to sink during long-term use and improving the durability of the reinforcement effect.

[0008] Preferably, a first protective pad is fixedly connected to the contact surface of the first fastening plate;

[0009] By adopting the above technical solution and setting the first protective pad, a flexible buffer layer can be formed when the first fastening plate contacts the side wall of the beam, avoiding direct hard contact between the metal first fastening plate and the beam surface, which would cause wear. At the same time, the first protective pad can also adapt to the slight unevenness that may exist on the beam surface, ensuring a tighter and more uniform contact between the first fastening plate and the beam.

[0010] Preferably, a second protective pad is fixedly connected to the contact surface of the second fastening plate;

[0011] By adopting the above technical solution and setting a second protective pad, flexible protection can be provided when the second fastening plate contacts the bottom of the beam. This can prevent the second fastening plate from rigidly squeezing the bottom of the beam, which could cause cracks or damage to the concrete surface. At the same time, the elastic properties of the second protective pad can compensate for any minor unevenness that may exist at the bottom of the beam, making the pressure distribution between the second fastening plate and the bottom of the beam more uniform and ensuring that the upward pressing support force can be stably transmitted.

[0012] Preferably, the top of the U-shaped reinforcing plate is fixedly connected to connecting ear plates on both opposite sides, the top of the connecting ear plates overlaps the bottom of the beam, and multiple connecting bolts are provided inside the connecting ear plates. The U-shaped reinforcing plate is installed and connected to the bottom of the beam by multiple connecting bolts.

[0013] By adopting the above technical solution and setting the matching structure of connecting ear plate and connecting bolt, the U-shaped reinforcing plate can be stably fixed to the bottom of the beam, which can ensure the connection strength between the U-shaped reinforcing plate and the bottom of the beam and prevent the reinforcing plate from shifting or loosening during the stress process.

[0014] Preferably, main reinforcing bars are provided at all four corners inside the beam;

[0015] By adopting the above technical solution and setting the distribution pattern of the main reinforcing bars at the four corners inside the beam, the mechanical properties of the material can be fully utilized, and the overall bending and shear resistance of the beam can be improved.

[0016] Preferably, an auxiliary reinforcing bar is provided between the two main reinforcing bars;

[0017] By adopting the above technical solution and using the connection structure between the two main reinforcing bars, the stress distribution inside the beam can be further optimized. This allows the main and auxiliary reinforcing bars to form a synergistic stress system, which can improve the overall stiffness and load-bearing capacity of the beam and prevent cracks from forming due to local stress concentration when the beam is subjected to large loads.

[0018] Preferably, the main reinforcing bars and auxiliary reinforcing bars are provided with clamping reinforcing bars on their surfaces;

[0019] By adopting the above technical solution, the clamped steel bars can be used to fix the main steel bars and auxiliary steel bars by wrapping around them, thus forming a tight overall frame. This can limit the relative displacement of the main steel bars and auxiliary steel bars during the stress process, further optimize the integrity and collaborative performance of the steel bar skeleton, and enhance the beam's ability to resist deformation.

[0020] Preferably, the clamp reinforcement is provided with X-shaped connecting reinforcement inside;

[0021] By adopting the above technical solution and setting up a cross-support structure for X-shaped connecting steel bars inside the clamp steel bars, the area surrounded by the clamp steel bars can be divided into stable triangular units. This can improve the torsional performance and local stability of the steel frame, effectively transfer stress in different directions, prevent the clamp steel bars from deforming or loosening under stress, further strengthen the connection between the main steel bars, auxiliary steel bars and clamp steel bars, and make the entire steel skeleton form a more efficient load-bearing community, thereby improving the structural safety and durability of concrete beams under complex loads.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] This type of prestressed irregular-section concrete beam, by setting a U-shaped reinforcing plate, can form a wrap-around support for the bottom of the beam. When the first knob is turned, the first bolt rotates in the first threaded cap and drives the first fastening plate to move closer to the side of the beam until it is tightly fitted with the side wall of the beam, thus fixing the U-shaped reinforcing plate on both sides of the beam. At the same time, turning the second knob can make the second bolt move axially along the second threaded cap, causing the second fastening plate to press upward against the bottom of the beam, further enhancing the connection stability between the U-shaped reinforcing plate and the beam. This double fastening structure can not only effectively distribute the load on the beam, but also form an upward supporting force on the middle of the beam through the second fastening plate, thereby suppressing the tendency of the beam to sink during long-term use and improving the durability of the reinforcement effect. Attached Figure Description

[0024] Figure 1 This is a frontal three-dimensional structural diagram of this application;

[0025] Figure 2 This is a side-view perspective three-dimensional structural diagram of this application;

[0026] Figure 3 This is a schematic diagram of the structure in the side cross-section of this application;

[0027] Figure 4 This is a structural schematic diagram of the beam cross-section in this application;

[0028] Figure 5 This is a structural schematic diagram of the cross-section of the first threaded cap in this application.

[0029] In the diagram: 1. Beam; 101. Main reinforcement; 102. Auxiliary reinforcement; 103. Clamp reinforcement; 104. X-shaped connecting reinforcement; 2. U-shaped reinforcing plate; 201. Connecting bolt; 202. First threaded cap; 203. First bolt; 204. First knob; 205. First fastening plate; 206. First protective pad; 207. Second threaded cap; 208. Second bolt; 209. Second knob; 2010. Second fastening plate; 2011. Second protective pad; 2012. Connecting ear plate. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0031] Example 1: A prestressed irregular-section concrete beam, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 5 It includes beam 1, and a U-shaped reinforcing plate 2 is installed and connected to the bottom of beam 1;

[0032] Multiple first threaded caps 202 are fixedly connected to both sides of the U-shaped reinforcing plate 2. First bolts 203 are threaded inside the first threaded caps 202. First knobs 204 and first fastening plates 205 are fixedly connected to both ends of the first bolts 203, respectively. Multiple second threaded caps 207 are fixedly connected to the bottom of the U-shaped reinforcing plate 2. Second bolts 208 are threaded inside the second threaded caps 207. Second fastening plates 2010 and second knobs 209 are fixedly connected to the top and bottom ends of the second bolts 208, respectively. By setting up the U-shaped reinforcing plate 2, a wrap-around support can be formed at the bottom of the beam 1. When the first knob 204 is rotated, the first bolts 203 are engaged with the first threaded caps 204 and 205. The first fastening plate 205 is rotated and moved closer to the side of the beam 1 until it is tightly fitted to the side wall of the beam 1. This fixes the U-shaped reinforcing plate 2 on both sides of the beam 1. At the same time, rotating the second knob 209 causes the second bolt 208 to move axially along the second threaded cap 207, causing the second fastening plate 2010 to press upward against the bottom of the beam 1, further enhancing the connection stability between the U-shaped reinforcing plate 2 and the beam 1. This double fastening structure can not only effectively distribute the load on the beam 1, but also form an upward supporting force on the middle of the beam 1 through the second fastening plate 2010, thereby suppressing the tendency of the beam 1 to dent during long-term use and improving the durability of the reinforcement effect.

[0033] Please see Figure 4 and Figure 5A first protective pad 206 is fixedly connected to the contact surface of the first fastening plate 205. By setting the first protective pad 206, a flexible buffer layer is formed when the first fastening plate 205 contacts the side wall of the beam 1, preventing the metal first fastening plate 205 from directly contacting the surface of the beam 1 and causing wear. Simultaneously, the first protective pad 206 can adapt to any minor unevenness on the surface of the beam 1, ensuring a tighter and more uniform contact between the first fastening plate 205 and the beam 1. A second protective pad 2011 is fixedly connected to the contact surface of the second fastening plate 2010. By setting the second protective pad 2011, flexible protection is provided when the second fastening plate 2010 contacts the bottom of the beam 1, preventing the second fastening plate 2010 from rigidly compressing the bottom of the beam 1 and causing cracks or damage to the concrete surface. The elastic properties of the second protective pad 2011 can compensate for any minor unevenness or concavity at the bottom of the beam 1, making the pressure distribution between the second fastening plate 2010 and the bottom of the beam 1 more uniform. This ensures that the upward-pressing support force can be stably transmitted. The top of the U-shaped reinforcing plate 2 is fixedly connected to connecting ear plates 2012 on both opposite sides. The top of the connecting ear plates 2012 overlaps at the bottom of the beam 1. Multiple connecting bolts 201 are provided inside the connecting ear plates 2012. The U-shaped reinforcing plate 2 is installed and connected to the bottom of the beam 1 by multiple connecting bolts 201. By setting the matching structure between the connecting ear plates 2012 and the connecting bolts 201, the U-shaped reinforcing plate 2 can be stably fixed to the bottom of the beam 1, ensuring the connection strength between the U-shaped reinforcing plate 2 and the bottom of the beam 1, and preventing the reinforcing plate from shifting or loosening during the stress process.

[0034] Please see Figure 4Main reinforcing bars 101 are provided at each of the four corners inside the beam 1. By designing the distribution of the main reinforcing bars 101 at the four corners inside the beam 1, the mechanical properties of the material can be fully utilized, thereby improving the overall bending and shear resistance of the beam 1. Auxiliary reinforcing bars 102 are provided between the two main reinforcing bars 101. The connection structure of the auxiliary reinforcing bars 102 between the two main reinforcing bars 101 can further optimize the stress distribution inside the beam 1. The main reinforcing bars 101 and auxiliary reinforcing bars 102 can form a synergistic stress system, thereby improving the overall stiffness and load-bearing capacity of the beam 1. This can prevent cracks caused by local stress concentration when the beam 1 is subjected to large loads. Clamping reinforcing bars 103 are provided on the surface of the main reinforcing bars 101 and auxiliary reinforcing bars 102. The surrounding fixing structure of the clamping reinforcing bars 103 on the surface of the main reinforcing bars 101 and auxiliary reinforcing bars 102 can form a tight overall frame for the dispersed reinforcing bars. It can limit the relative displacement of the main reinforcing bars 101 and auxiliary reinforcing bars 102 during the stress process, and can further optimize the integrity and collaborative performance of the reinforcing cage, thereby enhancing the beam 1's resistance to deformation. The clamping reinforcing bars 103 are equipped with X-shaped connecting reinforcing bars 104. By setting the cross support structure of the X-shaped connecting reinforcing bars 104 inside the clamping reinforcing bars 103, the area surrounded by the clamping reinforcing bars 103 can be divided into stable triangular units, which can improve the torsional performance and local stability of the reinforcing cage, effectively transfer stress in different directions, prevent the clamping reinforcing bars 103 from deforming or loosening under stress, further strengthen the connection between the main reinforcing bars 101, auxiliary reinforcing bars 102 and clamping reinforcing bars 103, and make the entire reinforcing cage form a more efficient stress-bearing community, thereby improving the structural safety and durability of the concrete beam under complex loads.

[0035] The implementation principle of this application embodiment is as follows:

[0036] In practical applications, when beam 1 is subjected to external loads, the main reinforcing bars 101 and auxiliary reinforcing bars 102 inside beam 1 first work together to bear the main tensile and compressive forces. The clamping reinforcing bars 103 form an integral frame with the main reinforcing bars 101 and auxiliary reinforcing bars 102 through the surrounding fixing effect, which can limit their relative displacement. Among them, the X-shaped connecting reinforcing bars 104 can further divide the area surrounded by the clamping reinforcing bars 103 into triangular units, which can improve the torsional performance and local stability of the reinforcing bar skeleton and ensure that the stress is uniformly transmitted within the reinforcing bar system.

[0037] Meanwhile, the U-shaped reinforcing plate 2 at the bottom of beam 1 can be initially fixed by connecting ear plate 2012 and connecting bolt 201. When the bending moment generated by the load causes the bottom of beam 1 to tend to be tensile, the first fastening plate 205 is tightly attached to the side wall of beam 1 under the action of the first bolt 203, which can provide lateral restraint force. The second fastening plate 2010, under the tightening action of the second bolt 208, can form an upward supporting force on the bottom of beam 1, and together with the steel reinforcement cage, resist the bending deformation of beam 1. It can effectively disperse the load on beam 1 and suppress the tendency of depression. Through the combination of the internal strengthening of the steel reinforcement cage and the external support of the U-shaped reinforcing plate 2, the stability and load-bearing capacity of the prestressed irregular section concrete beam structure can be comprehensively improved.

Claims

1. A prestressed irregular-section concrete beam, comprising a beam body (1), characterized in that: A U-shaped reinforcing plate (2) is installed and connected to the bottom of the beam (1); The U-shaped reinforcing plate (2) is fixedly connected to multiple first threaded caps (202) on both sides. The first threaded caps (202) are internally threaded with first bolts (203). The first bolts (203) are fixedly connected to both ends with first knobs (204) and first fastening plates (205). The bottom of the U-shaped reinforcing plate (2) is fixedly connected to multiple second threaded caps (207). The second threaded caps (207) are internally threaded with second bolts (208). The top and bottom ends of the second bolts (208) are fixedly connected to second fastening plates (2010) and second knobs (209).

2. The prestressed irregular-section concrete beam according to claim 1, characterized in that: The first fastening plate (205) has a first protective pad (206) fixedly connected to its contact surface.

3. A prestressed irregular-section concrete beam according to claim 1, characterized in that: The second fastening plate (2010) has a second protective pad (2011) fixedly connected to its contact surface.

4. A prestressed irregular-section concrete beam according to claim 1, characterized in that: The top of the U-shaped reinforcing plate (2) is fixedly connected to the connecting ear plates (2012) on both sides. The top of the connecting ear plates (2012) overlaps at the bottom of the beam (1). Multiple connecting bolts (201) are provided inside the connecting ear plates (2012). The U-shaped reinforcing plate (2) is installed and connected to the bottom of the beam (1) by multiple connecting bolts (201).

5. A prestressed irregular-section concrete beam according to claim 1, characterized in that: The beam (1) has main steel bars (101) at each of its four corners.

6. A prestressed irregular-section concrete beam according to claim 5, characterized in that: An auxiliary steel bar (102) is provided between the two main steel bars (101).

7. A prestressed irregular-section concrete beam according to claim 6, characterized in that: The main reinforcing bars (101) and auxiliary reinforcing bars (102) are provided with clamping reinforcing bars (103) on their surfaces.

8. A prestressed irregular-section concrete beam according to claim 7, characterized in that: The clamp reinforcement (103) is provided with an X-shaped connecting reinforcement (104) inside.

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