Reinforced recombination bamboo-ultra-high performance concrete T-shaped combined continuous beam
By reorganizing bamboo beams with gluten and combined with ultra -high -performance concrete, the T -shaped combination continuous beam was formed, and the pressure resistance of the reorganized bamboo beam in the structural engineering failed to fully play, poor sound insulation and fire resistance, and small span, and span. The problem of multi -miniature has achieved high rigidity and security improvement of the structure.
Patent Information
- Application Number
- CN202421229758.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
In the application of existing recombinant bamboo beams in structural engineering, insufficient material strength in tension zone leads to brittle damage, insufficient compressive strength, poor sound insulation and fire resistance, low safety, and limited processing technology leads to small span , multiple simple-branch structures, uneven bending moment distribution, affecting the bearing capacity and usage function.
Adopt a reorganized bamboo-ultra-high-performance concrete T-shaped combination continuous beam. By pouring ultra-high-performance concrete wing plates on the reorganized bamboo abdomen plate, setting anti-shelter and built-in steel bars, extended steel bars welded Set up stirrup and ultra-high-performance concrete protective layers to form a mixed structure of bamboo-concrete.
Improve the overall stiffness and carrier performance of the structure, give full play to the excellent performance of reorganization bamboo materials, improve the state of stress state and bending momentum, enhance the sound insulation resistance performance of the structure, and improve the safety of use.
Smart Images
Figure CN222412598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge engineering, in particular to a reinforced reconstituted bamboo-ultra-high performance concrete T-shaped composite continuous beam. Background Art
[0002] Reconstructed bamboo is a new type of bamboo-based material that is made by thinning, drying, impregnating with glue, assembling and hot-pressing raw bamboo. It has the advantages of high strength and low carbon, reliable force and high degree of industrialization. In recent years, it has been widely used in the field of structural engineering.
[0003] Among them, reconstructed bamboo beam-type components are widely used in structural engineering. The failure of reconstructed bamboo beams is generally brittle failure caused by insufficient material strength in the tensile zone, and the compressive strength of reconstructed bamboo has not been fully utilized; the sound insulation and fire resistance of traditional bamboo and wood structures are poor, and the safety is low. At the same time, due to the limitations of the processing technology of reconstructed bamboo, the span of reconstructed bamboo components is generally small, and most of the bending components are simply supported structures; under the action of uniformly distributed loads, the bending moment value of reconstructed bamboo simply supported beams reaches the maximum at the mid-span control section, and gradually decreases along the span of the beam toward the support, resulting in uneven distribution of bending moments. Except for the mid-span control section, the material strength of other sections cannot be fully utilized. Compared with continuous beams, simply supported beams of the same span have larger deformations, and bamboo creep will further increase the deformation of reconstructed bamboo beams, thereby reducing the bearing capacity of the components and affecting the use function. Utility Model Content
[0004] The purpose of the present application is to provide a reinforced reconstructed bamboo-ultra-high performance concrete T-shaped composite continuous beam, aiming to solve the problems in the prior art.
[0005] The embodiment of the present application provides a reinforced reconstituted bamboo-ultra-high performance concrete T-shaped composite continuous beam, comprising a T-shaped beam body and a connecting member; the T-shaped beam body comprises a reconstituted bamboo web and an ultra-high performance concrete wing plate; the ultra-high performance concrete wing plate is cast and formed on the top of the reconstituted bamboo web; a plurality of slots are evenly arranged on the top of the reconstituted bamboo web along the span direction of the beam; shear pins are installed in the slots, and the two are bonded and anchored by two-component epoxy resin; two built-in steel bars are respectively arranged on the upper and lower parts of the reconstituted bamboo web and extend to the sides; the protruding part of the built-in steel bars is an extended steel bar; a fixing anchor is arranged on the surface of the extended steel bar; adjacent T-shaped beam bodies are connected by butt-welding extended steel bars; a connecting member is arranged on the outside of the extended steel bar; the connecting member comprises stirrups and an ultra-high performance concrete protective layer; the stirrups are vertically welded to the outside of the extended steel bar; the ultra-high performance concrete protective layer is cast and formed on the outside of the extended steel bar and the stirrups.
[0006] Furthermore, an orthogonal bidirectional steel mesh is laid inside the ultra-high performance concrete wing panel.
[0007] Furthermore, the built-in steel bars are ribbed steel bars, and the cross-section of the protruding portion is a smooth plane that is cut flat.
[0008] Furthermore, the shear-resistant pin is an M8.8 grade pin.
[0009] Furthermore, the stirrups are closed stirrups, a plurality of stirrups are provided, and are evenly arranged on the outside of the extended steel bars along the span direction of the bridge.
[0010] The beneficial effects of the utility model are as follows: the utility model utilizes shear connectors and built-in steel bar reconstructed bamboo beams to increase the overall rigidity of the structure, thereby improving the structural bearing capacity. The excellent performance of reconstructed bamboo materials is fully utilized; at the same time, the main beams are quickly connected by welding the extended steel bars, and rigid or semi-rigid node connection components are set at the connection points to solve the problems of small span and multiple simple supports caused by the processing technology of reconstructed bamboo beams, and improve the stress state of reconstructed bamboo beams. In addition, the bamboo-concrete hybrid structure system has better sound insulation and fire resistance, which can improve the safety performance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is the overall structure diagram of the utility model.
[0012] Figure 2 Schematic diagram of the top structure of the reconstructed bamboo web.
[0013] Figure 3 Schematic diagram of the internal structure of the reconstructed bamboo web.
[0014] Figure 4 A is a schematic diagram of the cross section.
[0015] Figure 5 This is a structural diagram of the main beam connection.
[0016] In the figure:
[0017] 1. Restructured bamboo web; 2. Internal steel bars; 20. External steel bars; 3. Stirrups; 4. Shear pins; 5. UHP concrete cover; 6. UHP concrete wing plate; 7. Slots. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] like Figures 1 to 5The reinforced reconstituted bamboo-ultra-high performance concrete T-shaped composite continuous beam shown in the figure comprises a T-shaped beam body and a connecting member; the T-shaped beam body comprises a reconstituted bamboo web 1 and an ultra-high performance concrete wing 6; the ultra-high performance concrete wing 6 is cast and formed on the top of the reconstituted bamboo web 1; a plurality of slots 7 are evenly arranged on the top of the reconstituted bamboo web 1 along the span direction of the beam; shear pins 4 are installed in the slots 7, and the two are bonded and anchored by two-component epoxy resin; two built-in steel bars 2 are respectively arranged on the upper and lower sides of the reconstituted bamboo web 1 and extend to the sides; the extended part of the built-in steel bar 2 is an extended steel bar 20; a fixed anchor is arranged on the surface of the extended steel bar 20 to ensure that the extended part does not deviate; adjacent T-shaped beam bodies are connected through The protruding steel bars 20 are connected by butt welding; the protruding steel bars 20 are provided with connecting components on the outside; the connecting components include stirrups 3 and ultra-high performance concrete protective layers 5; the stirrups 3 are vertically welded to the outside of the protruding steel bars 20; the ultra-high performance concrete protective layers 5 are cast on the outside of the protruding steel bars 20 and stirrups 3; under the same span, the ultra-high performance concrete is cast in situ at the junction of the concrete slab and the main beam, and the shear pins 4 are used to restructure the bamboo beam with built-in steel bars to form a continuous beam, which can improve the bending stiffness of the main beam section, improve the stress state of the main beam and the uneven distribution of bending moment, thereby improving the structural bearing performance; at the same time, the bamboo-concrete hybrid structure can effectively improve the fire resistance, sound insulation and vibration performance of the bamboo beam. Improve the safety of structural use.
[0020] The ultra-high performance concrete wing plate 6 is paved with an orthogonal bidirectional steel mesh, and coarse aggregate ultra-high performance concrete is used to reduce the plate thickness and self-weight; and orthogonal bidirectional steel bars are arranged inside the wing plate to meet the bending resistance requirements of the concrete plate.
[0021] The built-in steel bars 2 are ribbed steel bars, and the cross-section of the protruding part is a smooth plane that is cut flat; the higher the reinforcement ratio of the built-in steel bars 2, the more significant the bending resistance of the composite continuous beam; the built-in steel bars 2 need to be pressed together with the bamboo bundle to avoid weakening of the cross-sectional performance due to secondary grooving, and the surface of the protruding steel bars 20 is made flat and smooth, which can facilitate subsequent combination and assembly.
[0022] The shear pin 4 is an M8.8 grade pin, which can be selected as a pin with a length of 82.5 mm and a diameter of 12 mm. During installation, the groove 7 is first polished and cleaned, the shear pin 4 is wiped with alcohol, and then the shear pin 4 is bonded and anchored to the web using a two-component epoxy resin.
[0023] The stirrups 3 are closed stirrups, and are provided in multiple groups. They are evenly arranged outside the extended steel bars 20 along the span direction. Providing enough stirrups 3 can meet the shear resistance requirements of the welding points to the greatest extent.
[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A reinforced bamboo-ultra-high performance concrete T-shaped composite continuous beam, characterized in that: It comprises a T-beam body and a connecting member; the T-beam body comprises a reconstituted bamboo web and an ultra-high performance concrete wing plate; the ultra-high performance concrete wing plate is cast on the top of the reconstituted bamboo web; a plurality of slots are evenly arranged on the top of the reconstituted bamboo web along the span direction of the beam; shear pins are installed in the slots, and the two are bonded and anchored by two-component epoxy resin; two built-in steel bars are respectively arranged on the upper and lower parts of the reconstituted bamboo web and extend to the sides; the protruding part of the built-in steel bars is an extended steel bar; a fixing anchor is arranged on the surface of the extended steel bar; adjacent T-beam bodies are connected to each other by butt-welding extended steel bars; a connecting member is arranged on the outside of the extended steel bar; the connecting member comprises stirrups and an ultra-high performance concrete protective layer; the stirrups are vertically welded to the outside of the extended steel bar; the ultra-high performance concrete protective layer is cast on the outside of the extended steel bar and the stirrups.
2. The reinforced reconstructed bamboo-ultra-high performance concrete T-shaped composite continuous beam according to claim 1, characterized in that: An orthogonal bidirectional steel mesh is laid inside the ultra-high performance concrete wing plate.
3. The reinforced reconstructed bamboo-ultra-high performance concrete T-shaped composite continuous beam according to claim 1, characterized in that: The internal steel bars are ribbed steel bars, and the cross section of the extended portion is a smooth plane that is cut flat.
4. The reinforced reconstructed bamboo-ultra-high performance concrete T-shaped composite continuous beam according to claim 1, characterized in that: The shear-resistant pin is an M8.8 grade pin.
5. The reinforced reconstructed bamboo-ultra-high performance concrete T-shaped composite continuous beam according to claim 4, characterized in that: The stirrups are closed stirrups, a plurality of which are provided and are evenly welded and arranged on the outside of the extended steel bars along the direction of the bridge span.