Prestressed fiber cable system self-resetting composite door leaf structure

Abstract

The application discloses a prestressed fiber cable system self-resetting composite door leaf structure, and belongs to the technical field of anti-blast and anti-impact structures of civil air defense projects. The prestressed fiber cable system self-resetting composite door leaf structure comprises a door leaf frame, a composite door leaf panel, a prestressed fiber cable system and a cable support seat. The composite door leaf panel is fixed in the door leaf frame to form a blast-facing surface. The prestressed fiber cable system is arranged on the back-blast surface side of the composite door leaf panel and comprises a plurality of vertical prestressed fiber cables arranged along the height direction of the door leaf and a plurality of transverse connecting fiber cables arranged along the width direction of the door leaf. The cable support seat is arranged along the length direction of the vertical prestressed fiber cables and is fixed on the back-blast surface side of the composite door leaf panel. The transverse connecting fiber cables are connected with the plurality of vertical prestressed fiber cables at spatial intersection points through node connecting pieces. The prestressed fiber cable system self-resetting composite door leaf structure realizes the lightweight, low residual deformation and self-resetting functions of the protective door leaf, and simultaneously improves the corrosion resistance and the modular maintainability.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof and impact-resistant structural technology for civil defense engineering, specifically a prestressed fiber cable system self-resetting composite material protective door structure. Background Technology

[0002] Currently, protective door panels generally follow the traditional structural approach of "steel panel + steel stiffening ribs," resulting in a large overall size and weight. After a burst, residual deformation can easily occur, affecting opening and closing, and the doors are prone to corrosion in damp underground environments. Furthermore, their adaptability to different protection levels and installation spaces is insufficient. The door panel structure and maintenance methods need to be updated, requiring breakthroughs in both material and load-bearing systems. This is mainly reflected in the following points: 1) The door structure needs to be further lightweighted to reduce the burden of opening and closing and the costs of installation and transportation; 2) Door explosion-proof design needs to shift from "plastic energy dissipation" to controllable deformation and recoverability to reduce residual deformation and the risk of door jamming; 3) Key components need to be further made more corrosion-resistant and modularized to improve adaptability to underground environments and the ability to be quickly replaced; 4) The door system needs to be further standardized and made easier to maintain, so as to facilitate inspection, maintenance and rapid post-war repair.

[0003] While existing protective door structures can provide a certain degree of blast resistance, they also have many inherent defects: (1) Heavy weight and high inertia: The high density of steel results in a large overall weight of the door leaf, which places extremely high demands on the load-bearing capacity of the hinges, locking mechanisms and door frame, making opening and closing difficult and increasing transportation and installation costs.

[0004] (2) Large residual deformation: Under strong explosive impact load, the steel panel and stiffening ribs are prone to enter the plastic deformation stage, resulting in irreversible dents or warping. The residual deformation will change the fit clearance between the door leaf and the door frame, making it difficult to open the door leaf after the explosion or even jamming it, which seriously affects emergency evacuation and functional recovery.

[0005] (3) High risk of stress concentration and local failure: The structure relies on dense stiffening ribs and a large number of welded nodes to transmit force, which easily leads to stress concentration at welds and joints, and there is a risk of local failure such as tearing and cracking.

[0006] (4) Poor corrosion resistance and difficult maintenance: The damp underground environment and salt spray make steel components prone to corrosion and rapid performance degradation. Traditional door leaf structure is complex, and it is difficult to assess and repair damage after impact. It often requires complete replacement, resulting in high maintenance costs.

[0007] (5) Lack of self-resetting ability: The existing structure mainly relies on the plastic deformation of the material to dissipate energy, lacks an effective active recovery mechanism, cannot automatically rebound after impact, and has unstable repeated explosion resistance performance.

[0008] Therefore, the most pressing issue to be addressed in current protective door technology is to significantly reduce the door's weight, minimize residual deformation after impact, and avoid the risk of jamming, while ensuring explosion-proof load-bearing capacity, and simultaneously improve the structure's corrosion resistance and maintainability. Summary of the Invention

[0009] To address the technical problems existing in the prior art, this invention provides a prestressed fiber cable system self-resetting composite material protective door structure. Through the synergistic work of the composite material panel and the prestressed fiber cable system, it achieves lightweight, high explosion resistance, low residual deformation, and self-resetting function.

[0010] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows: A self-resetting composite material protective door structure with a prestressed fiber cable system includes a door frame, a composite material door panel, a prestressed fiber cable system, and cable support seats. The composite material door panel is fixed within the door frame to form the blast-facing surface. The prestressed fiber cable system is arranged on the blast-resistant side of the composite material door panel and includes multiple vertical prestressed fiber cables arranged along the height direction of the door panel and horizontal connecting fiber cables arranged along the width direction of the door panel. The cable support seats are arranged along the length direction of the vertical prestressed fiber cables and fixed to the blast-resistant side of the composite material door panel to limit and guide the vertical prestressed fiber cables. The horizontal connecting fiber cables are connected to the multiple vertical prestressed fiber cables at spatial intersections via node connectors.

[0011] Furthermore, the protective door structure also includes a tensioning end anchoring component and a fixed end anchoring component. The tensioning end anchoring component and the fixed end anchoring component are respectively connected to the two ends of the vertical prestressed fiber cable and the transverse connecting fiber cable and anchored to the door frame to apply and lock the prestress.

[0012] Furthermore, the node connector is a cable support base.

[0013] Furthermore, the cable support includes an upper clamping plate, a wear-resistant pad, and a clamping connector; the wear-resistant pad is disposed at the contact interface between the vertical prestressed fiber cable / transverse connecting fiber cable and the upper clamping plate; the vertical prestressed fiber cable / transverse connecting fiber cable is confined within the guide channel formed by the upper clamping plate and the wear-resistant pad.

[0014] Furthermore, the fixed end anchoring assembly includes an outer casing and an upper wedge-shaped clamp and a lower wedge-shaped clamp disposed therein; the end of the vertical prestressed fiber cable / transverse connecting fiber cable passes through the conical hole of the outer casing and is wedge-locked and anchored within the conical hole by the upper wedge-shaped clamp and the lower wedge-shaped clamp.

[0015] Furthermore, the tensioning end anchoring assembly includes an anchoring shell, a hollow anchoring stud, a tensioning locking nut, a front conical clamping sleeve, and a rear wedge-shaped clamping block; the front conical clamping sleeve and the rear wedge-shaped clamping block are located at both ends of the hollow anchoring stud; the ends of the vertical prestressed fiber cable / lateral connecting fiber cable pass through the through holes of the hollow anchoring stud and the anchoring shell; tightening the tensioning locking nut can drive the front conical clamping sleeve to radially contract to clamp the vertical prestressed fiber cable / lateral connecting fiber cable, and work with the rear wedge-shaped clamping block to achieve double self-locking.

[0016] Furthermore, at the connection hole location for installing the cable support seat on the composite material door panel, a metal flange nut seat is pre-embedded. The metal flange nut seat includes a cylindrical body with internal threads and a flange for distributing load.

[0017] Furthermore, the composite material door panel is a fiber-reinforced composite laminate or sandwich panel, and the layup structure of the composite material door panel includes: 0° layup, oriented along the height of the door panel, accounting for 40% to 60% of the total layup; ±45° layup, accounting for 20% to 40% of the total layup; and 90° layup, accounting for 10% to 20% of the total layup.

[0018] Furthermore, the main body of the door frame and cable support is made of lightweight metal material; a low-friction wear-resistant bushing is provided at the contact interface between the cable support and the vertical prestressed fiber cable / transverse connecting fiber cable.

[0019] The prestressed fiber cable system self-resetting composite material protective door structure provided by this invention has the following advantages compared with the prior art: (1) The prestressed fiber cable system self-resetting composite material protective door structure of the present invention uses a composite material panel instead of a steel panel and combines it with a lightweight metal frame, which significantly reduces the weight of the door panel, reduces the load on the hinges, locks and door frame, and reduces opening and closing inertia and transportation and installation costs. The composite material and fiber cable itself have excellent corrosion resistance and are suitable for underground humid environments. Wear-resistant bushings and embedded metal parts are used in key connection parts to further improve durability and reliability.

[0020] (2) The prestressed fiber cable system self-resetting composite material protective door structure of the present invention stores energy through elastic elongation during impact and recovers elastically after unloading, providing active restoring force for the door panel. This effectively reduces or even eliminates residual deformation, fundamentally reducing the risk of door jamming after an explosion, and improving emergency passage recovery capability and structural reusability. The cable system efficiently converts the out-of-plane deformation of the panel into the axial tension of the cable through the support base, achieving efficient load-bearing by utilizing the high strength of the fiber material. The prestress of the cable provides initial stiffness, improving the dynamic response of the door panel.

[0021] (3) The prestressed fiber cable system self-resetting composite material protective door structure of the present invention consists of cables, support seats, anchoring components, etc. forming relatively independent modules. After a single cable or vulnerable part (such as wear-resistant bushing) is damaged, it can be quickly disassembled and replaced without disassembling the entire door, which greatly reduces maintenance costs and repair time. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the prestressed fiber cable system on the back surface of the protective door leaf of the present invention.

[0023] Figure 2 This is a schematic diagram of the single prestressed fiber cable module structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the tensioning end anchoring component of the present invention.

[0025] Figure 4 This is a schematic diagram of the fixed-end anchoring assembly of the present invention.

[0026] Figure 5 This is a schematic diagram of the cable support base of the present invention.

[0027] Figure 6 This is a schematic diagram of the protective door leaf of the present invention in the initial prestress state.

[0028] Figure 7 This is a schematic diagram of the protective door leaf of the present invention under explosion conditions.

[0029] Figure 8 This is a schematic diagram of the protective door leaf of the present invention in the unloaded and reset state.

[0030] Figure 9 This is a schematic diagram showing the layup angle and thickness of the composite material door panel of the present invention.

[0031] Figure 10 This is a schematic diagram of the bushing in the hole area of ​​the composite material door panel and the flange pre-embedded nut seat of the present invention.

[0032] Explanation of markings in the diagram: 1. Door leaf frame; 2. Composite material door leaf panel; 21. Bushing; 22. Flange; 3. Vertical prestressed fiber cable; 4. Cable support seat; 41. Upper clamping plate; 42. Wear-resistant pad; 43. Clamping connector; 5. Tensioning end anchoring assembly; 51. Upper preload spring; 52. Lower preload spring; 53. Anchoring shell; 54. Front conical compression sleeve; 55. Rear wedge clamp; 56. Rear and front conical compression sleeve; 57. Tensioning end mounting seat; 58. Tensioning lock nut; 59. Hollow anchoring stud; 6. Fixed end anchoring assembly; 61. Upper wedge clamp; 62. Lower wedge clamp; 63. Spring; 64. Outer shell; 65. Mounting seat; 66. Mounting base; 7. Lateral connecting fiber cable. Detailed Implementation

[0033] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0034] Figures 1 to 10 This invention illustrates one embodiment of a self-resetting composite material protective door structure based on a prestressed fiber cable system. The protective door structure mainly includes a door body structure and a prestressed fiber cable system.

[0035] The main structure of the door leaf includes a rectangular door leaf frame 1 and a composite material door leaf panel 2 fixedly embedded in the door leaf frame. The door leaf frame 1 is usually made of welded or bolted profiles, providing boundary support and installation foundation for the entire door leaf. The composite material door leaf panel 2 serves as the explosion-proof surface and is fixed to the frame 1 by peripheral bolts.

[0036] In this embodiment, the composite door panel 2 is made of fiber reinforced polymer (FRP), which can be a laminate or sandwich panel, preferably with a multi-directional layup structure, and its layup design is optimized for explosion load resistance. The 0° layup direction is arranged along the height of the door panel, accounting for 40%–60% of the total layup, providing the main bending stiffness; the ±45° layup accounts for 20%–40% of the total layup, providing shear and torsional resistance; the 90° layup accounts for 10%–20% of the total layup, providing lateral stability; the total thickness of the panel is T. total The thickness of a single layer is T ply .

[0037] The composite door panel 2 has connection holes for installing the cable support base 4. Preferably, a metal flange nut seat is pre-embedded. The metal flange nut seat has a cylindrical body with internal threads and a flange 22 located at one end of the cylindrical body. The flange 22 is embedded in the interlayer of the composite door panel 2 or attached to the surface of the panel to distribute the local compressive load transmitted by the fastening connection and prevent the composite material hole wall from being crushed. A metal bushing 21 can be installed at the hole wall to further improve the wear resistance and crush resistance of the hole area.

[0038] In this embodiment, the prestressed fiber cable system is arranged on the side of the composite material door panel 2, which is the side facing away from the blast (i.e., the side not facing the blast). The prestressed fiber cable system includes multiple parallel vertical prestressed fiber cables 3 and transverse connecting fiber cables 7.

[0039] In this embodiment, the vertical prestressed fiber cable 3 is arranged along the height direction of the door leaf, with its upper end connected to the tensioning end anchoring component 5 and its lower end connected to the fixed end anchoring component 6. These two anchoring components are fixedly installed on the upper and lower edges of the door leaf frame 1. The tensioning end anchoring component 5 is connected to the door leaf frame 1 to apply and lock the prestress, and the fixed end anchoring component 6 is connected to the door leaf frame 1 to provide reaction force and form the end anchoring boundary.

[0040] In this embodiment, one or more cable support seats 4 are provided along the length of the vertical prestressed fiber cable 3, and the multiple cable support seats 4 are installed at intervals. The cable support seats 4 are fixed to the back surface of the composite material door panel 2, that is, fixed to the door frame 1 and attached to the composite material door panel 2. The function of the cable support seats 4 is to move with the panel when the composite material door panel 2 undergoes out-of-plane deformation and force the vertical prestressed fiber cable 3 to deflect at the support seat.

[0041] Specifically, the cable support base 4 includes an upper pressure plate 41, a wear-resistant pad 42, and a clamping connector 43. The clamping connector 43 connects the upper pressure plate 41 to the composite material door panel 2, forming a "guide channel" that allows the vertical prestressed fiber cable 3 to slide but restricts its disengagement. The wear-resistant pad 42 is disposed at the contact interface between the vertical prestressed fiber cable 3 and the upper pressure plate 41 to reduce friction and wear and protect the outer surface of the fiber cable. The vertical prestressed fiber cable 3 is located within the guide channel formed between the upper pressure plate 41 and the wear-resistant pad 42.

[0042] In some embodiments, depending on the arrangement of the cable support 4, some cable support 4 are installed at the intersection of the vertical prestressed fiber cable 3 and the transverse connecting fiber cable 7. The transverse connecting fiber cables 7 are arranged along the width of the door leaf and intersect with multiple vertical prestressed fiber cables 3 in space, forming a spatial grid-like constraint. At the intersection nodes, the transverse connecting fiber cables 7 and the vertical prestressed fiber cables 3 are connected by cable support seats 4 to restrict the lateral displacement of the vertical prestressed fiber cables 3. In other embodiments, the cable support seats 4 can be replaced with interlaced braided nodes or collar-type limiting connection structures.

[0043] One end of the transverse connecting fiber cable 7 is connected to the tension end anchoring component 5, and the other end is connected to the fixed end anchoring component 6. These two anchoring components are fixedly installed on the left and right sides of the door frame 1.

[0044] like Figure 4 As shown, in this embodiment, the fixed-end anchoring assembly 6 includes an upper wedge-shaped clamp 61, a lower wedge-shaped clamp 62, an outer sleeve 64, a mounting base 65, and a mounting base 66. The outer sleeve 64 has a tapered hole and an opening at one end. The upper wedge-shaped clamp 61, the lower wedge-shaped clamp 62, the spring 63, and the mounting base 65 are disposed inside the outer sleeve 64, and the mounting base 66 is disposed at the opening of the outer sleeve 64, with the mounting base 65 fixed to the mounting base 66. The upper wedge-shaped clamp 61 and the lower wedge-shaped clamp 62 are a pair of clamps with an outer conical surface, which are sleeved on the ends of the vertical prestressed fiber cable 3 / transverse connecting fiber cable 7 and fixed to the mounting base 65. One end of the transverse connecting fiber cable 7 passes through the central hole of the mounting base 65 and the mounting base 66 and extends into the outer sleeve 64. One end of the spring 63 is fixed to the outer sleeve 64, and the other end is fixedly connected to the vertical prestressed fiber cable 3 / transverse connecting fiber cable 7.

[0045] During assembly, the ends of the vertical prestressed fiber cable 3 and the transverse connecting fiber cable 7, which are fitted with the upper wedge-shaped clip 61 and the lower wedge-shaped clip 62, are pushed into the conical holes of the outer casing 64. The further they are pushed, the tighter they become, achieving wedge-shaped self-locking anchoring. The spring 63 is used to maintain the initial position of the clips. The outer casing is finally fixed to the door frame 1 via the mounting seat 65 and the mounting base 66.

[0046] like Figure 3As shown, in this embodiment, the tensioning end anchoring assembly 5 includes an upper preload spring 51, a lower preload spring 52, an anchoring housing 53, a front conical clamping sleeve 54, a rear wedge-shaped clamping block 55, a rear front conical clamping sleeve 56, a tensioning end mounting seat 57, a tensioning locking nut 58, and a hollow anchoring stud 59. The upper preload spring 51, lower preload spring 52, front conical clamping sleeve 54, and rear front conical clamping sleeve 56 are located inside the anchoring housing 53, and the tensioning end mounting seat 57 is located at the opening of the anchoring housing 53. The front conical clamping sleeve 54 is conical, and the rear front conical clamping sleeve 56 has a conical groove that matches the front conical clamping sleeve 54. The conical section of the front conical clamping sleeve 54 is located inside the conical groove of the front conical clamping sleeve 54, and there is a cavity gap between the conical section of the front conical clamping sleeve 54 and the groove of the rear front conical clamping sleeve 56. The upper preload spring 51 and the lower preload spring 52 are respectively installed at the ends of the front conical clamping sleeve 54, and the other ends of the upper preload spring 51 and the lower preload spring 52 are fixed to the anchoring housing 53. The front conical clamping sleeve 54 is fixedly installed on one side of the tensioning end mounting seat 57, and the rear wedge-shaped clamp 55, the tension locking nut 58, and the hollow anchoring stud 59 are located on the other side of the tensioning end mounting seat 57. The rear wedge-shaped clamp 55 is conical and passes through the vertical prestressed fiber cable 3 / transverse connecting fiber cable 7, with the conical section set in the inner cavity of the hollow anchoring stud 59. The hollow anchoring stud 59 is sleeved on the vertical prestressed fiber cable 3 / transverse connecting fiber cable 7, and the tension locking nut 58 is tightened on the hollow anchoring stud 59. The vertical prestressed fiber cable 3 and the horizontal connecting fiber cable 7 pass through the center of the anchoring shell 53, the upper pre-tightening spring 51 and the lower pre-tightening spring 52, the front conical compression sleeve 54 and the rear front conical compression sleeve 56 in sequence, and finally pass through the through hole of the hollow anchoring stud 59.

[0047] Specifically, in the tensioning end anchoring assembly 5, tightening the tension locking nut 58 pushes the front conical clamping sleeve 56 forward, forcing the front conical clamping sleeve 54 to radially contract within the conical groove, thereby tightly clamping the cable. Simultaneously, the cable's backward movement is blocked by the rear wedge-shaped clamping block 55 at the rear end, providing auxiliary clamping. This forms a dual self-locking mechanism of "front conical clamping and rear wedge stopping," achieving a "tightening as it tightens" anti-loosening effect. The entire tensioning end anchoring assembly 5 is fixed to the door frame 1 via the tensioning end mounting base 57.

[0048] Combination Figures 6 to 8 The working principle of the protective door structure of the present invention to achieve explosion resistance and self-reset function is as follows: (1) Initial state: such as Figure 6 As shown, after installation, the initial prestress P0 is applied and locked to each vertical prestressed fiber cable 3 through the tensioning end anchoring assembly 5. At this time, the cable is straightened, the cable support seat 4 only serves as a guide for the cable, and the composite material door panel 2 is in a flat state.

[0049] (2) Explosion-bearing condition: such as Figure 7 As shown, when the blast shock wave acts on the blast-facing side of the composite door panel 2, the composite door panel 2 undergoes flexural deformation (maximum deflection Wmax) in the direction away from the blast. The cable support 4 fixed to the back of the panel displaces along with the panel. Due to the displacement of the cable support 4, the vertical prestressed fiber cables 3 passing through it are forced to deflect at the support, increasing the actual path length of the cables and causing them to elongate elastically. According to Hooke's Law, the tension in the cables increases from the initial P0 to P0+ΔP. This increased tension ΔP acts in the opposite direction on the composite door panel 2 through the cable support 4, forming a restoring moment that resists further deformation, thereby significantly improving the overall bending stiffness and load-bearing capacity of the door panel. At the same time, the transverse connecting fiber cables 7 ensure the coordinated work of each vertical prestressed fiber cable 3.

[0050] (3) Unload and reset status: such as Figure 8 As shown, after the explosive impact load disappears, the external load that forced the composite door panel 2 to deform is released. At this time, the stretched vertical prestressed fiber cable 3 is in a high-tension state (P0+ΔP), storing a large amount of elastic potential energy. Driven by the elastic restoring force, the vertical prestressed fiber cable 3 attempts to shorten back to its original length. This retraction motion is converted into a tensile force (restoring force Fr) on the back surface of the composite door panel 2 through the cable support seat 4. Under the combined action of the restoring force Fr and the elastic recovery of the panel material itself, the panel is driven to rebound, eventually returning to a state close to its original flatness with minimal residual deformation. Since the self-locking anchoring structure at the tensioning end can stably maintain the initial prestress P0, this self-resetting function is repeatable.

[0051] The prestressed design method for the protective door leaf structure of the present invention is as follows: To ensure that the door leaf has self-resetting capability after unloading and does not exceed the allowable load of the cable, the prestress P0 can be determined within the range jointly defined by the "resetting requirement constraint" and the "strength constraint".

[0052] Axial stiffness of a single cable k for: Where E is the elastic modulus of a single cable, A is the effective cross-sectional area, and L is the effective stress-bearing length.

[0053] Under the design conditions, the maximum out-of-plane deflection at the support is , The equivalent constraint length of the support in the direction of the cable axis can be taken as the distance from the support to the nearest anchor point or the distance between adjacent supports, preferably the smaller of the two. Then the maximum tension increment of the cable is estimated as follows: Let n be the number of vertical prestressed fiber cables, and the minimum total restoring force required to achieve repositioning is: Then the prestress must satisfy: At the same time, the cable strength constraint must be met; the total tension of the cable cannot exceed its allowable load. Finally, within the range determined by the lower and upper limits, a reasonable prestress P0 value is selected by comprehensively considering factors such as anchorage reliability and support friction. The allowable stress is determined based on the principle that the anchorage does not slip, the support does not slip, and the hole area connection does not exceed the allowable stress.

[0054] The above embodiments are merely preferred examples of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A prestressed fiber cable system self-resetting composite material protective door structure, characterized in that, The device includes a door frame, a composite material door panel, a prestressed fiber cable system, and cable support seats. The composite material door panel is fixed within the door frame to form the blast-facing surface. The prestressed fiber cable system is arranged on the blast-resistant side of the composite material door panel and includes multiple vertical prestressed fiber cables arranged along the height of the door panel and horizontal connecting fiber cables arranged along the width of the door panel. The cable support seats are set along the length of the vertical prestressed fiber cables and fixed on the blast-resistant side of the composite material door panel to limit and guide the vertical prestressed fiber cables. The horizontal connecting fiber cables are connected to the multiple vertical prestressed fiber cables at spatial intersections via node connectors.

2. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 1, characterized in that, The protective door structure also includes a tensioning end anchoring component and a fixed end anchoring component. The tensioning end anchoring component and the fixed end anchoring component are respectively connected to the two ends of the vertical prestressed fiber cable and the horizontal connecting fiber cable and anchored to the door frame to apply and lock the prestress.

3. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 2, characterized in that, The node connector is a cable support base.

4. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 3, characterized in that, The cable support includes an upper clamping plate, a wear-resistant pad, and a clamping connector; the wear-resistant pad is disposed at the contact interface between the vertical prestressed fiber cable / transverse connecting fiber cable and the upper clamping plate; the vertical prestressed fiber cable / transverse connecting fiber cable is confined within the guide channel formed by the upper clamping plate and the wear-resistant pad.

5. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 3, characterized in that, The fixed-end anchoring assembly includes an outer shell and an upper wedge-shaped clamp and a lower wedge-shaped clamp disposed therein; the end of the vertical prestressed fiber cable / transverse connecting fiber cable passes through the conical hole of the outer shell and is wedge-tightly anchored by the upper wedge-shaped clamp and the lower wedge-shaped clamp within the conical hole.

6. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 3, characterized in that, The tensioning end anchoring assembly includes an anchoring shell, a hollow anchoring stud, a tensioning locking nut, a front conical clamping sleeve, and a rear wedge-shaped clamping block; the front conical clamping sleeve and the rear wedge-shaped clamping block are located at both ends of the hollow anchoring stud; the ends of the vertical prestressed fiber cable / lateral connecting fiber cable pass through the through holes of the hollow anchoring stud and the anchoring shell; tightening the tensioning locking nut can drive the front conical clamping sleeve to radially contract to clamp the vertical prestressed fiber cable / lateral connecting fiber cable, and work with the rear wedge-shaped clamping block to achieve double self-locking.

7. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 1, characterized in that, At the connection hole location for installing the cable support seat on the composite material door panel, a metal flange nut seat is pre-embedded. The metal flange nut seat includes a cylindrical body with internal threads and a flange for distributing load.

8. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 1, characterized in that, The composite material door panel is a fiber-reinforced composite laminate or sandwich panel. The layup structure of the composite material door panel includes: 0° layup, oriented along the height of the door panel, accounting for 40% to 60% of the total layup; ±45° layup, accounting for 20% to 40% of the total layup; and 90° layup, accounting for 10% to 20% of the total layup.

9. The prestressed fiber cable system self-resetting composite material protective door structure according to claim 3, characterized in that, The main body of the door frame and cable support is made of lightweight metal material; a low-friction wear-resistant bushing is provided at the contact interface between the cable support and the vertical prestressed fiber cable / transverse connecting fiber cable.

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