FRP profile frame beam for glass trestle and construction method of FRP profile frame beam

Abstract

The invention relates to an FRP profile frame beam for a glass trestle and a construction method of the FRP profile frame beam, and belongs to the technical field of bridge engineering. Each FRP profile comprises at least two groups of rectangular profiles and triangular profiles, the multiple groups of triangular profiles are sequentially arranged between the at least two groups of rectangular profiles, and the multiple groups of triangular profiles and the rectangular profiles on the two sides are fixed into a whole through epoxy resin glue; the split type sleeve connecting pieces are arranged on the transverse and longitudinal connecting joints of the FRP sectional materials; the split type sleeve connecting piece comprises a first sleeve and a second sleeve, the first sleeve and the second sleeve are oppositely combined to form an inner cavity, and a plurality of FRP section bars are respectively fixed in the inner cavity through epoxy resin glue. Through the synergistic effect of the split type sleeve connecting piece and the epoxy resin glue, the connecting reliability of the FRP profile frame beam is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and particularly relates to an FRP profile frame beam for a glass trestle bridge and a construction method thereof. Background Art

[0002] With the rapid development of glass trestle bridge construction, higher requirements are put forward for the lightweight, durability and construction efficiency of bridge structures. Traditional steel or reinforced concrete structures are difficult to meet the requirements due to problems such as large self-weight and easy corrosion. Fiber Reinforced Polymer (FRP), with its characteristics of light weight, high strength, corrosion resistance and similar thermal expansion characteristics to tempered glass decks, has gradually become an alternative. However, the node connection technology of FRP profiles is still the core problem restricting its large-scale application. Existing connection methods are difficult to have both stiffness and toughness, easily leading to local stress concentration or material damage, and affecting the reliability of the overall structure.

[0003] At present, bolt connection methods are mostly used for FRP profiles in glass trestle bridges. Bolt connection requires drilling holes in FRP profiles, which easily causes fiber breakage and a decrease in shear strength. Moreover, the bolt pre-tightening force may cause local stress concentration, affecting the durability of the structure. In addition, existing FRP bridge structures mostly focus on cables or local reinforcement, and mostly use a mixture of FRP profiles and heterogeneous materials, resulting in coordination problems at the interfaces of heterogeneous materials. Therefore, traditional connection nodes are prone to looseness or fatigue cracks under dynamic loads and are difficult to meet the long-term operation requirements of glass trestle bridges.

[0004] Therefore, there is an urgent need for an efficient and reliable connection scheme for FRP profile frame beams for glass trestle bridges. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an FRP profile frame beam for a glass trestle bridge and a construction method thereof. The technical problems to be solved by the present invention are realized through the following technical solutions:

[0006] The present invention provides an FRP profile frame beam for a glass trestle bridge, including: FRP profiles, with multiple FRP profiles connected horizontally and vertically; each FRP profile includes a rectangular profile and a triangular profile. At least two groups of rectangular profiles are provided, and multiple groups of triangular profiles are arranged in sequence between at least two groups of rectangular profiles. And multiple groups of triangular profiles are fixed into one body with the rectangular profiles on both sides through epoxy resin glue; split sleeve connectors, arranged at the horizontal and vertical connection nodes of multiple FRP profiles; the split sleeve connectors include a first sleeve and a second sleeve, the first sleeve and the second sleeve are combined to form an inner cavity, and multiple FRP profiles are respectively fixed in the inner cavity through epoxy resin glue.

[0007] In one embodiment of the present invention, two sets of the rectangular profiles are arranged on the outside, and two sets of the rectangular profiles are arranged on the inside. Multiple sets of triangular profiles are arranged in sequence between the rectangular profiles on the outside and the rectangular profiles on the inside.

[0008] In one embodiment of the present invention, between the two sets of rectangular profiles on the outside and the two sets of rectangular profiles on the inside are respectively fixed by epoxy resin glue.

[0009] In one embodiment of the present invention, the triangular profile is an isosceles triangle, and adjacent triangular profiles are fixedly connected by epoxy resin glue.

[0010] In one embodiment of the present invention, the first sleeve is provided with an extension portion extending downward, and the second sleeve is bolted to the extension portion.

[0011] In one embodiment of the present invention, through connection holes are provided on both the first sleeve and the second sleeve for connecting the guardrail or sling of the glass trestle.

[0012] In one embodiment of the present invention, the split sleeve connector is in a cross shape, and the horizontally arranged FRP profiles and the vertically arranged FRP profiles are respectively fixed in the inner cavity of the split sleeve connector by epoxy resin glue to form a three-dimensional stress node.

[0013] The present invention also provides a construction method for an FRP profile frame beam of a glass trestle, for the above-mentioned FRP profile frame beam of a glass trestle. The method includes:

[0014] Inject epoxy resin glue between adjacent rectangular profiles, between adjacent triangular profiles, and between triangular profiles and adjacent rectangular profiles, and prefabricate to obtain FRP profiles;

[0015] Locate the second sleeve, insert the horizontally arranged FRP profile into the second sleeve, place the first sleeve on the second sleeve and temporarily fix it to form an inner cavity;

[0016] Pressurize and inject epoxy resin glue into the inner cavity. After curing at normal temperature for at least 24 hours, insert the vertically arranged FRP profile into the inner cavity and synchronously inject epoxy resin glue;

[0017] After the epoxy resin glue cures, bolt the first sleeve to the second sleeve to obtain an FRP profile frame beam;

[0018] Install a toughened glass bridge deck and guardrail on the FRP profile frame beam to complete the construction of the FRP profile frame beam of the glass trestle.

[0019] In one embodiment of the present invention, the longitudinally arranged FRP profile is inserted into the inner cavity, and epoxy resin adhesive is injected synchronously, including: inserting the longitudinally arranged FRP profile into the inner cavity, and injecting epoxy resin adhesive under synchronous pressure until it overflows, and then applying a contact pressure of at least 0.3 MPa and maintaining it for 30 minutes.

[0020] In one embodiment of the present invention, after the epoxy resin adhesive is cured, the first sleeve and the second sleeve are connected by bolts, including: after the curing hardness of the epoxy resin adhesive ≥ 80 HD, the bolts are tightened three times to connect the first sleeve and the second sleeve, wherein the torques of the three tightenings are 20%, 50% and 100% of the designed torque of the bolts in sequence.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The FRP profile frame beam for the glass trestle of the present invention significantly improves the connection reliability of the FRP profile frame beam through the synergistic effect of the split sleeve connector and the epoxy resin adhesive. The split sleeve design avoids mechanical damage to the FRP profile. The epoxy resin adhesive layer evenly fills the inner cavity of the sleeve, forming a three-dimensional stress-bearing node, effectively dispersing local stress and reducing the risk of stress concentration. This structure takes into account both rigidity and toughness, remains stable under dynamic loads, and extends the service life. At the same time, based on the assembly of FRP profiles, the thermal expansion coefficients of FRP profiles and tempered glass match, reducing the interfacial stress caused by temperature changes and further enhancing the structural durability.

[0023] The FRP profile of the present invention adopts a design of splicing rectangular profiles and triangular profiles, significantly improving the overall performance of the structure. The rectangular profile provides a stable load-bearing base surface to ensure uniform load distribution; the triangular profile enhances the compressive and bending resistance through geometric advantages, effectively dispersing local stress and reducing the risk of stress concentration. The combination of the two forms a continuous force transmission path, optimizing the interfacial shear strength and making up for the deficiency of the shear resistance of a single cross-section.

[0024] The split sleeve connector of the present invention significantly improves the interfacial strength and durability of the connection node through the synergistic effect of bolts and epoxy resin adhesive. Bolts provide stable mechanical constraints, and the epoxy resin adhesive evenly fills the inner cavity and the gaps between profiles, forming a continuous bonding interface, effectively dispersing local stress. The inner wall of the sleeve is roughened, combined with the chemical bonding effect of the epoxy resin adhesive, to achieve a dual force transmission mechanism of mechanical interlocking and chemical bonding, greatly enhancing the shear and tensile load-bearing capacities.

[0025] The construction method of the FRP profile frame beam for the glass trestle of the present invention adopts prefabrication and assembly and step-by-step glue injection, greatly simplifies the on-site operation process, significantly shortens the construction period, and reduces the labor cost. Through prefabricated split sleeve connectors and modular FRP profiles, rapid and precise docking is achieved. The step-by-step glue injection process with pressure is adopted to ensure continuous and uniform glue layers, reduce defects such as bubbles and voids. After curing, the bolt torque is applied in stages to optimize the stress state and improve the anti-fatigue performance of the joints.

[0026] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented in accordance with the content of the description. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, is described in detail as follows. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of an FRP profile frame beam for a glass trestle provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a horizontally arranged FRP profile frame beam provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of a longitudinally arranged FRP profile frame beam provided by an embodiment of the present invention;

[0030] Figure 4 is provided by an embodiment of the present invention Figure 1 partial sectional view of;

[0031] Figure 5 is a schematic sectional structure diagram of an FRP profile provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic exploded structure diagram of an FRP profile provided by an embodiment of the present invention;

[0033] Figure 7 is a schematic structural diagram of a split sleeve connector provided by an embodiment of the present invention;

[0034] Figure 8 is a schematic structural diagram of a first sleeve provided by an embodiment of the present invention;

[0035] Figure 9 is a schematic structural diagram of a second sleeve provided by an embodiment of the present invention;

[0036] Figure 10 is a schematic exploded structure diagram of an FRP profile frame beam for a glass trestle provided by an embodiment of the present invention;

[0037] Figure 11 It is a schematic cross-sectional structure diagram of a glass trestle provided by an embodiment of the present invention;

[0038] Figure 12 It is a schematic plan and elevation structure diagram of a glass trestle provided by an embodiment of the present invention;

[0039] Figure 13 It is a flowchart of a construction method of an FRP profile frame beam for a glass trestle provided by an embodiment of the present invention.

[0040] Reference numerals: 100 - FRP profile; 110 - rectangular profile; 120 - triangular profile; 200 - split sleeve connector; 210 - first sleeve; 220 - second sleeve; 230 - bolt; 300 - connection hole. Detailed implementation manners

[0041] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the accompanying drawings and specific implementation manners, details an FRP profile frame beam for a glass trestle and its construction method proposed according to the present invention.

[0042] The foregoing and other technical contents, features, and effects of the present invention can be clearly presented in the following detailed description of the specific implementation manners in conjunction with the accompanying drawings. Through the description of the specific implementation manners, a more in-depth and specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and explanation, and are not used to limit the technical solution of the present invention.

[0043] Embodiment 1

[0044] As Figures 1 to 12 shown, Figure 1 It is a schematic structure diagram of an FRP profile frame beam for a glass trestle provided by an embodiment of the present invention; Figure 2 It is a schematic structure diagram of a horizontally arranged FRP profile frame beam provided by an embodiment of the present invention; Figure 3 It is a schematic structure diagram of a longitudinally arranged FRP profile frame beam provided by an embodiment of the present invention; Figure 4 It is provided by an embodiment of the present invention Figure 1 partial sectional view;

[0045] Figure 5 It is a schematic sectional structure diagram of an FRP profile provided by an embodiment of the present invention; Figure 6 It is a schematic exploded structure diagram of an FRP profile provided by an embodiment of the present invention; Figure 7 It is a schematic structure diagram of a split sleeve connector provided by an embodiment of the present invention; Figure 8 It is a schematic structure diagram of a first sleeve provided by an embodiment of the present invention; Figure 9It is a schematic structural diagram of the second sleeve provided by an embodiment of the present invention; Figure 10 It is a schematic exploded structural diagram of an FRP profile frame beam for a glass trestle provided by an embodiment of the present invention; Figure 11 It is a schematic cross-sectional structural diagram of a glass trestle provided by an embodiment of the present invention; Figure 12 It is a schematic plan and elevation structural diagram of a glass trestle provided by an embodiment of the present invention.

[0046] In this embodiment, an FRP profile frame beam for a glass trestle includes: FRP profiles 100, with multiple FRP profiles 100 connected horizontally and vertically; each FRP profile 100 includes a rectangular profile 110 and a triangular profile 120. There are at least two groups of rectangular profiles 110. Multiple groups of triangular profiles 120 are arranged in sequence between at least two groups of rectangular profiles 110, and multiple groups of triangular profiles 120 are fixed to the rectangular profiles 110 on both sides as a whole through epoxy resin glue; a split sleeve connector 200, which is arranged at the horizontal and vertical connection nodes of multiple FRP profiles 100; the split sleeve connector 200 includes a first sleeve 210 and a second sleeve 220. The first sleeve 210 and the second sleeve 220 are combined to form an inner cavity, and multiple FRP profiles 100 are respectively fixed in the inner cavity through epoxy resin glue.

[0047] In an alternative embodiment, two groups of rectangular profiles 110 are arranged on the outside, and another two groups of rectangular profiles 110 are arranged on the inside. Multiple groups of triangular profiles 120 are arranged in sequence between the rectangular profiles 110 on the outside and the rectangular profiles 110 on the inside, and the two groups of rectangular profiles 110 on the outside and the two groups of rectangular profiles 110 on the inside are respectively fixed through epoxy resin glue. Through the synergistic effect of mechanical fitting and chemical bonding, the interface strength is improved. Verified by finite element analysis, this design can increase the interface shear strength by 42%, making up for the shortcoming of the insufficient shear resistance of FRP materials.

[0048] Exemplarily, the triangular profile 120 is an isosceles triangle. Each isosceles triangle is arranged and spliced in sequence to fill the space between the rectangular profile 110 on the outside and the rectangular profile 110 on the inside, and then the adjacent triangular profiles 120 are fixedly connected through epoxy resin glue to be fixed as an integral FRP profile 100.

[0049] It should be noted that the present invention adopts the design of splicing a rectangular profile 110 and a triangular profile 120, which significantly improves the overall performance of the structure. The rectangular profile 110 provides a stable bearing base surface to ensure uniform load distribution; the triangular profile 120 enhances the compressive and bending resistance through geometric advantages, effectively disperses local stress, and reduces the risk of stress concentration. The combination of the two forms a continuous force transmission path, optimizes the interface shear strength, and makes up for the deficiency of the shear resistance of a single section. In addition, due to the high cost of FRP finished beams, the present invention adopts a profile splicing beam with a new cross-section form, which not only greatly improves the strength but also reduces the cost. Moreover, due to the low coefficient of thermal expansion of FRP materials, the deformation under temperature changes is small, making it suitable for environments with large temperature changes.

[0050] In an alternative embodiment, the first sleeve 210 is provided with an extension portion extending downward, and the second sleeve 220 is connected to the extension portion by a bolt 230. Setting the bolt holes at the lower part ensures the downward viewing rate of the glass trestle.

[0051] Exemplarily, bolt holes are spacedly arranged at the lower part of the extension portion of the first sleeve 210, and the second sleeve 220 is connected to the first sleeve 210 by a bolt 230 passing through the bolt holes.

[0052] In an alternative embodiment, through connection holes 300 are provided on both the first sleeve 210 and the second sleeve 220 for connecting the guardrail or sling of the glass trestle. Similarly, connection holes 300 are also provided at one end or both ends of the horizontally arranged FRP profile 100.

[0053] In an alternative embodiment, the split sleeve connector 200 is in a cross shape. The horizontally arranged FRP profile 100 and the vertically arranged FRP profile 100 are respectively fixed in the inner cavity of the split sleeve connector 200 by epoxy resin glue. The FRP profiles 100 are connected by socket insertion through the split sleeve connector 200, and then circumferential bonding is achieved through epoxy resin glue, forming a three-dimensional stress-bearing node. This hybrid connection method takes into account both structural stiffness and material compatibility, and the shear strength of the node is increased by more than 30%.

[0054] Exemplarily, a full-bonding connection is adopted between the FRP profile 100 and the split sleeve connector 200 to avoid mechanical connection damage. At the same time, the inner wall of the split sleeve connector 200 in contact with the FRP profile 100 is roughened to ensure the bonding strength.

[0055] It should be noted that through the synergistic effect of the bolt 230 and the epoxy resin adhesive, the present invention significantly improves the interfacial strength and durability of the connection node. The bolt 230 provides stable mechanical restraint, and the epoxy resin adhesive evenly fills the inner cavity and the profile gap to form a continuous bonding interface, effectively dispersing local stress. The inner wall of the sleeve is roughened, and combined with the chemical bonding effect of the epoxy resin adhesive, a dual force transmission mechanism of mechanical interlocking and chemical bonding is realized, greatly enhancing the shear and tensile bearing capacities. In addition, the epoxy resin adhesive layer also isolates the direct contact between the split sleeve connector 200 made of steel and the FRP profile 100.

[0056] In other words, the present invention forms a composite force transmission structure in which the epoxy resin adhesive bears the main load and the bolt provides limit restraint. The epoxy resin adhesive layer bears 70% of the static load, and the bolt bears 30% of the dynamic load and failure protection. By controlling the pre-tightening force and the way of grading torque, the epoxy resin adhesive layer is in a compressed state, improving the fatigue life.

[0057] The FRP profile frame beam for a glass trestle of the present invention significantly improves the connection reliability of the FRP profile frame beam through the synergistic effect of the split sleeve connector and the epoxy resin adhesive. The split sleeve design avoids mechanical damage to the FRP profile. The epoxy resin adhesive layer evenly fills the inner cavity of the sleeve to form a three-dimensional force-bearing node, effectively dispersing local stress and reducing the risk of stress concentration. This structure takes into account both rigidity and toughness, remains stable under dynamic loads, and extends the service life. At the same time, based on the assembly of FRP profiles, the thermal expansion coefficients of the FRP profiles and the tempered glass match, reducing the interfacial stress caused by temperature changes and further enhancing the structural durability.

[0058] Embodiment 2

[0059] Traditional steel or reinforced concrete glass trestles need to set up temporary supports or cast-in-place brackets, especially in deep water or rapid flow environments, the construction is difficult and time-consuming, and the existing interface designs between steel components and FRP profiles do not match, resulting in high requirements for on-site splicing accuracy and low construction error tolerance. In view of this, the present invention provides a construction method for an FRP profile frame beam for a glass trestle, as Figures 11 to 13 shown Figure 13 is a flow chart of a construction method for an FRP profile frame beam for a glass trestle provided by an embodiment of the present invention.

[0060] In this embodiment, the construction method for an FRP profile frame beam for a glass trestle includes:

[0061] Step 1: Inject epoxy resin adhesive between adjacent rectangular profiles, between adjacent triangular profiles, and between triangular profiles and adjacent rectangular profiles, and prefabricate to obtain FRP profiles;

[0062] Step 2: Position the second sleeve, insert the transversely arranged FRP profile into the second sleeve, place the first sleeve on the second sleeve and temporarily fix it to form an inner cavity.

[0063] Exemplarily, after positioning the second sleeve on both sides of the working platform of the lower bridge, the transversely arranged FRP profile is hoisted and inserted into the second sleeve, and a 30 mm assembly gap is reserved at the end, and then the first sleeve is installed.

[0064] Exemplarily, the inner wall contact surfaces of the first sleeve and the second sleeve are both roughened to ensure bonding strength.

[0065] Step 3: Inject epoxy resin glue into the inner cavity under pressure. After curing at room temperature for at least 24 hours, insert the longitudinally arranged FRP profile into the inner cavity and inject epoxy resin glue simultaneously.

[0066] In an optional embodiment, the first sleeve and the second sleeve are temporarily fixed with a carbon fiber binding belt, epoxy resin glue (epoxy value 0.45-0.55Eq / 100g) is pressure-injected, and cured at room temperature for 24 hours.

[0067] In an optional embodiment, a longitudinally arranged FRP profile is inserted into the inner cavity and epoxy resin glue is injected simultaneously, including: inserting the longitudinally arranged FRP profile into the inner cavity, simultaneously applying a pressure of 0.2 to 0.4 MPa to inject epoxy resin glue until it overflows, and then applying a contact pressure of at least 0.3 MPa for 30 minutes.

[0068] Specifically, after the maintenance is completed, the FRP profiles on both sides are installed by double lifting machines, and the axis and elevation are calibrated by the total station. The positioning accuracy is ≤5mm. When the longitudinally set FRP profiles are docked in the air, the three-dimensional position is adjusted and the split sleeve connector is inserted. Epoxy resin glue is injected simultaneously until the glue overflows, and a contact pressure of 0.3MPa is applied and maintained for 30 minutes.

[0069] For example, during the process of injecting epoxy resin glue, the curing temperature (20-30°C, if the internal curing temperature of the glue is ℃) and humidity (≤60% RH) of the epoxy resin glue are monitored throughout the process to ensure the bonding quality. At the same time, an ultrasonic flaw detector is used to spot-check the continuity of the glue layer to ensure that the hollow area accounts for ≤5%, taking into account both installation adjustability and later maintainability. The shear force is transmitted through the dual effects of chemical bonding and mechanical bite to form a wrapping constraint on the FRP profile and allow construction fine-tuning.

[0070] In addition, the design redundancy of the connection nodes of FRP profiles is high, the installation precision requirements are strict, and the construction efficiency is low. The epoxy resin glue bonding process relies on manual operation, the uniformity of the glue layer is difficult to guarantee, and problems such as bubbles or uneven thickness frequently occur, affecting the integrity of the structure. Therefore, the present invention adopts a circumferential glue injection process, which simplifies the construction process while ensuring the injection quality of the epoxy resin glue.

[0071] Step 4: After the epoxy resin glue is cured, the first sleeve and the second sleeve are connected by bolts to obtain the FRP profile frame beam.

[0072] In an optional embodiment, after the epoxy resin glue is cured, the first sleeve and the second sleeve are connected by bolts, including: after the epoxy resin glue is cured to a hardness of ≥80HD, tightening the bolts three times to connect the first sleeve and the second sleeve, wherein the three tightening torques are 20%, 50% and 100% of the design torque of the bolts, respectively. Specifically, the interval between two adjacent tightenings must be at least minutes to ensure that the stress of the glue layer is released.

[0073] Step 5: Install the tempered glass bridge deck and guardrail on the FRP profile frame beam to complete the construction of the FRP profile frame beam for the glass plank bridge.

[0074] Exemplarily, a resin expansion joint is provided between the tempered glass bridge deck and the FRP frame beam to release stress, prevent cracking, and ensure structural safety.

[0075] Specifically, after the FRP profile frame beam is installed on the support of the lower bridge, the tempered glass and the paving layer are installed in sequence, the resin expansion joints between the tempered glass are installed, and the guardrails are installed. Finally, the bridge is completed, completing the construction of the FRP profile frame beam for the glass plank bridge and the glass plank bridge.

[0076] It is understandable that, during the specific construction, the FRP profile can be first inserted into the first sleeve and the second sleeve and temporarily fixed to form a transverse frame beam, and then installed on the support at the lower part of the bridge, and then the longitudinally arranged FRP profile can be connected by hoisting the transverse frame beam. The transversely arranged FRP profile and the longitudinally arranged FRP profile can also be connected as a whole and then installed on the support at the lower part of the bridge.

[0077] It is worth noting that the components required by the present invention are prefabricated, which is quick to install on site, reducing construction time and cost. Through the collaborative innovation of materials, structures, and construction methods, the industry problems of heavy weight of traditional steel-concrete structures and low reliability of bolted connections of FRP components are solved, and it is suitable for the rapid assembly and construction of large-span glass planks.

[0078] The construction method of the FRP profile frame beam for the glass trestle of the present invention adopts prefabrication and assembly and step-by-step glue injection, greatly simplifies the on-site operation process, significantly shortens the construction period, and reduces the labor cost. Through the prefabricated split sleeve connectors and modular FRP profiles, rapid and accurate docking is achieved. The step-by-step glue injection process with pressure is adopted to ensure that the glue layer is continuous and uniform, reducing the defects of bubbles and air pockets. After curing, the bolt torque is applied in stages to optimize the stress state and improve the anti-fatigue performance of the joints.

[0079] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "including", "comprising" or any other variant are intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the article or device including the said element. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The orientation or positional relationship indicated by "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0080] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An FRP profile frame beam for a glass trestle, characterized in that, Comprising: FRP profiles, with multiple said FRP profiles connected horizontally and vertically; Each said FRP profile includes a rectangular profile and a triangular profile. There are at least two groups of the rectangular profiles, and multiple groups of triangular profiles are arranged in sequence between at least two groups of the rectangular profiles, and multiple groups of triangular profiles are fixed integrally with the rectangular profiles on both sides through epoxy resin glue; Split sleeve connectors, arranged at the horizontal and vertical connection nodes of multiple said FRP profiles; the split sleeve connectors include a first sleeve and a second sleeve, the first sleeve and the second sleeve are combined to form an inner cavity, and multiple said FRP profiles are respectively fixed in the inner cavity through epoxy resin glue.

2. The FRP profile frame beam for a glass trestle according to claim 1, characterized in that, Two groups of the rectangular profiles are arranged on the outside, two groups of the rectangular profiles are arranged on the inside, and multiple groups of triangular profiles are arranged in sequence between the rectangular profiles on the outside and the rectangular profiles on the inside.

3. The FRP profile frame beam for a glass trestle according to claim 2, wherein, The two groups of rectangular profiles on the outside and the two groups of rectangular profiles on the inside are respectively fixed through epoxy resin glue.

4. The FRP profile frame beam for a glass trestle according to claim 1, characterized in that, The triangular profiles are isosceles triangles, and adjacent triangular profiles are fixedly connected through epoxy resin glue.

5. The FRP profile frame beam for a glass trestle according to claim 1, characterized in that, The first sleeve is provided with an extension part extending downward, and the second sleeve is connected to the extension part through bolts.

6. The FRP profile frame beam for a glass trestle according to claim 1, characterized in that, Both the first sleeve and the second sleeve are provided with through connection holes for connecting the guardrail or sling of the glass trestle.

7. The FRP profile frame beam for a glass trestle according to claim 1, wherein The split sleeve connector is in a cross shape, and the horizontally arranged FRP profile and the vertically arranged FRP profile are respectively fixed in the inner cavity of the split sleeve connector through epoxy resin glue to form a three-dimensional stress node.

8. A construction method for an FRP profile frame beam of a glass trestle, characterized in that, For the FRP profile frame beam for a glass trestle according to any one of claims 1 to 7, the method includes: Inject epoxy resin glue between adjacent rectangular profiles, between adjacent triangular profiles, and between triangular profiles and adjacent rectangular profiles, and prefabricate to obtain FRP profiles; Locate the second sleeve, insert the horizontally arranged said FRP profile into the second sleeve, place the first sleeve on the second sleeve and temporarily fix it to form an inner cavity; Pressurize and inject epoxy resin glue into the inner cavity. After curing at normal temperature for at least 24 hours, insert the vertically arranged said FRP profile into the inner cavity and synchronously inject epoxy resin glue; After the epoxy resin glue is cured, connect the first sleeve and the second sleeve through bolts to obtain an FRP profile frame beam; Install a toughened glass bridge deck and guardrail on the FRP profile frame beam to complete the construction of the FRP profile frame beam for a glass trestle.

9. The construction method of the FRP profile frame beam for the glass trestle according to claim 8, characterized in that, Insert the vertically arranged said FRP profile into the inner cavity and synchronously inject epoxy resin glue, including: Insert the vertically arranged said FRP profile into the inner cavity, synchronously pressurize and inject epoxy resin glue until it overflows, and apply a contact pressure of at least 0.3 MPa and maintain it for 30 min.

10. The construction method of the FRP profile frame beam for the glass trestle according to claim 8, characterized in that, After the epoxy resin glue is cured, connect the first sleeve and the second sleeve through bolts, including: After the curing hardness of the epoxy resin adhesive ≥ 80 HD, tighten the bolts three times to connect the first sleeve and the second sleeve, wherein the torques of the three tightenings are 20%, 50% and 100% of the design torque of the bolts in sequence.

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