Impact-resistant lightweight FRP parking apron structure

Abstract

The invention provides an anti-impact light-weight FRP parking apron structure which comprises structural columns arranged below a roof surface in a matrix mode, main beam connecting nodes corresponding to the structural columns are arranged on the roof surface, main beams are arranged between every two adjacent main beam connecting nodes in the front-back direction and the left-right direction, and the main beams and the main beam connecting nodes are spliced to form a panel supporting system. Platform panels are evenly laid on the top of the panel supporting system. The main beam connecting node is provided with a supporting short column which corresponds to the structural column and is fixedly arranged at the top of the roof surface, a high-damping rubber pad is arranged at the top of the supporting short column, a node short column is arranged at the top of the high-damping rubber pad, a component node is arranged at the top end of the node short column, and a connecting sleeve matched with the main beam is fixedly arranged on the side face of the component node; the end parts of the main beams are fixedly assembled in the corresponding connecting sleeves; the main beam and the platform panel are made of FRP materials. The self-weight is small, the influence on the original structure is reduced, the damage of accidental impact load is relieved, and the durability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aprons, and in particular relates to an impact-resistant lightweight FRP apron structure. Background Art

[0002] Existing overhead aprons mostly use steel structures or concrete structures as support structures, with corrugated aluminum plates laid on them as panels to form a platform specified by the specifications for helicopters or other vertical take-off and landing aircraft to take off and land. However, this structural solution still has the following problems that need to be solved urgently:

[0003] 1) Overhead helipads are mostly located on rooftops. Traditional steel structure components are heavy, difficult to hoist, and inconvenient to construct. Concrete structures require formwork, and the quality of on-site pouring is difficult to control, and it is easy to cause construction pollution. If an overhead helipad is added to an existing structure, the weight will increase significantly, which will have a greater impact on the original structure.

[0004] 2) The apron structure may encounter accidental impact loads caused by emergency landing of aircraft, threatening its structural safety. Currently, the apron structure has little consideration for such impact effects, and the structural safety needs to be further improved;

[0005] 3) Steel apron structures are susceptible to corrosion and require additional anti-corrosion coatings. Concrete apron structures also face a series of problems such as freeze-thaw cycles, rainwater infiltration, and environmental corrosion, which affect the long-term stability of the structural safety performance. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an impact-resistant lightweight FRP apron structure with a small dead weight, reduced impact on the original structure, reduced damage from accidental impact loads, and improved durability.

[0007] The technical solution of the present invention is: an impact-resistant lightweight FRP helipad structure, including structural columns arranged in a matrix below the roof surface, main beam connection nodes corresponding to the structural columns are arranged on the roof surface, and main beams are arranged between two adjacent main beam connection nodes in the front and rear and left and right directions. The main beams and the main beam connection nodes are spliced ​​to form a panel support system, and the top of the panel support system is evenly paved with platform panels; the main beam connection nodes have supporting short columns fixedly arranged on the top of the roof surface corresponding to the structural columns, and the top of the supporting short columns is provided with high-damping rubber pads, and the top of the high-damping rubber pads is provided with node short columns, and the top of the node short columns is provided with component nodes, and the side of the component node is fixedly provided with connecting sleeves matching the main beams; the ends of the main beams are fixedly assembled inside the corresponding connecting sleeves; the main beams and the platform panels are both made of FRP material.

[0008] A base plate is provided on the top of the supporting short column, an anchor bolt penetrating the base plate is fixedly provided on the upper end of the supporting short column, and the high-damping rubber pad is sleeved on the outside of the anchor bolt; a connecting plate is fixedly provided on the bottom of the node short column, the upper end of the anchor bolt penetrates the connecting plate, and a spring and a fixing nut are sequentially sleeved on the anchor bolt above the connecting plate.

[0009] An anchor bolt hole is opened inside the high damping rubber pad along its axis, and the inner diameter of the anchor bolt hole is larger than the diameter of the anchor bolt to prevent the anchor bolt from interfering with the horizontal deformation of the high damping rubber pad.

[0010] Horizontal limit baffles are evenly arranged on the top of the bottom plate surrounding the high damping rubber pad.

[0011] A panel connector matching the platform panel is arranged on the top of the component node, and the platform panel is assembled and connected with the panel connector.

[0012] Secondary beam connection nodes are arranged in the middle of the square area formed by the four adjacent main beam connection nodes and in the middle between the two adjacent main beam connection nodes in the front and rear and left and right directions; secondary beams are arranged between the two adjacent secondary beam connection nodes in the front and rear and left and right directions; the secondary beams are made of FRP material.

[0013] The main beam connection nodes and the secondary beam connection nodes are both made of steel, aluminum or FRP.

[0014] The cross-sections of the main beam and the secondary beam are box-shaped cross-sections or H-shaped cross-sections.

[0015] A grid plate is arranged at the top edge of the panel support system, and a mesh plate is arranged at the top center of the panel support system.

[0016] The back sides of the grille plate and the mesh plate are both provided with reinforcing ribs.

[0017] Beneficial effects of the present invention:

[0018] (1) In the present invention, in order to solve the problem of heavy weight of the apron in the prior art, the main beam and the platform panel are made of FRP material. The density of FRP material is only 1 / 4 to 1 / 5 of that of steel, and the strength is the same as that of steel. The strength of some materials, such as CFRP, can be 7.6 to 15 times that of steel. The material specific strength increases sharply, and the weight of components and the overall structure can be significantly reduced;

[0019] (2) In order to reduce the dynamic damage to the apron structure caused by aircraft take-off and landing or accidental collision, high damping rubber pads are added under the apron structure to provide viscoelastic support to the panel support system. The additional inertia force of the viscoelastic support can reduce the peak displacement of the structure and the vibration frequency of the main beam. High damping can accelerate the attenuation of dynamic loads.

[0020] (3) In order to solve the durability problem of the apron structure, FRP material is selected as the material of the main beam and the platform panel. The FRP material itself has excellent acid, alkali and salt corrosion resistance and moisture resistance, which fundamentally solves the structural durability problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the distribution of structural columns in the present invention.

[0022] Figure 2 It is a distribution diagram of the main beam connection nodes, secondary beam connection nodes, main beams, and secondary beams in the present invention.

[0023] Figure 3 It is a structural schematic diagram of the main beam connection node in the present invention.

[0024] Figure 4 It is a structural schematic diagram of the platform panel in the present invention.

[0025] Figure 5 It is a schematic diagram of the apron marking in the present invention. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limitations.

[0027] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 4 As shown, the impact-resistant lightweight FRP apron structure includes structural columns 1 arranged in a matrix below the roof surface 6. The roof surface 6 and the structural columns 1 are both the original structures of the building. The roof surface 6 is provided with main beam connection nodes 2 corresponding to the structural columns 1. Main beams 4 are arranged between the two main beam connection nodes 2 adjacent to each other in the front and rear and left and right. The main beams 4 and the main beam connection nodes 2 are spliced ​​to form a panel support system, and the top of the panel support system is evenly paved with platform panels 7; the main beam connection node 2 has a supporting short column 21 fixedly arranged on the top of the roof surface 6 corresponding to the structural column 1, and a high-damping rubber pad 23 is arranged on the top of the supporting short column 21. A node short column 27 is arranged on the top of the high-damping rubber pad 23, and a component node 29 is arranged on the top of the node short column 27. A connecting sleeve 291 matching the main beam 4 is fixedly arranged on the side of the component node 29; the end of the main beam 4 is fixedly assembled inside the corresponding connecting sleeve 291; the main beam 4 and the platform panel 7 are both made of FRP material In this embodiment, in order to solve the problem of heavy weight of the apron in the prior art, the main beam 4 and the platform panel 7 are made of FRP material. The density of FRP material is only 1 / 4 to 1 / 5 of that of steel, and the strength is the same as that of steel. Some materials, such as CFRP, can have a strength of 7.6 to 15 times that of steel. The material specific strength increases sharply, and the weight of components and the overall structure can be significantly reduced. In order to reduce the dynamic damage to the apron structure caused by aircraft takeoff and landing or accidental collision, a high-damping rubber pad 23 is added under the apron structure. The high-damping rubber pad 23 provides viscoelastic support to the panel support system. The additional inertial force of the viscoelastic support can reduce the peak displacement of the structure and reduce the vibration frequency of the main beam 4. The high damping can accelerate the attenuation of the dynamic load. In order to solve the durability problem of the apron structure, FRP material is preferably used as the material of the main beam 4 and the platform panel 7. The FRP material itself has excellent acid, alkali and salt corrosion resistance and moisture resistance, which fundamentally solves the problem of structural durability.

[0029] In some embodiments, a base plate 22 is provided on the top of the supporting short column 21, and an anchor bolt 25 penetrating the base plate is fixedly provided on the upper end of the supporting short column 21, and a high-damping rubber pad 23 is mounted on the outside of the anchor bolt 25. The supporting short column 21 is cast with concrete material, and the base plate 22 protects the top of the supporting short column 21 and provides stable support for the high-damping rubber pad 23; a connecting plate 24 is fixedly provided on the bottom of the node short column 27, and the upper end of the anchor bolt 25 penetrates the connecting plate 24, and a spring 26 and a fixing nut 261 are sequentially mounted on the anchor bolt 25 above the connecting plate 24, and the fixing nut 261 anchors the connecting plate 24 above the high-damping rubber pad 23, and the spring 26 applies an axial force to the fixing nut 261 to keep it in a locked state with the anchor bolt 25.

[0030] In some embodiments, an anchor hole 231 is opened inside the high damping rubber pad 23 along its axis, and the inner diameter of the anchor hole 231 is larger than the diameter of the anchor 25 to avoid the anchor 25 interfering with the horizontal deformation of the high damping rubber pad 23; specifically, the inner diameter of the anchor hole 231 is 1.2 to 2 times the diameter of the anchor 25.

[0031] In some embodiments, horizontal limit baffles 28 are evenly arranged on the top of the bottom plate 22 around the high damping rubber pad 23, and a gap is reserved between the horizontal limit baffle 28 and the high damping rubber pad 23 for the high damping rubber pad 23 to undergo horizontal deformation under normal load.

[0032] In some embodiments, a panel connector 291 matching the platform panel 7 is provided at the top of the component node 29, and the platform panel 7 and the panel connector 291 are assembled and connected; the back side of a single panel in the platform panel 7 has a mounting rib, and the panel connector 291 is "L"-shaped, and the mounting rib of the single panel and the panel connector 291 are assembled and fixed by bolts and nuts.

[0033] In some embodiments, a secondary beam connection node 3 is provided in the middle of a square area formed by four adjacent main beam connection nodes 2, and a secondary beam connection node 3 is also provided in the middle between two adjacent main beam connection nodes 2 in the front and rear and left and right directions; a secondary beam 5 is provided between two adjacent secondary beam connection nodes 3 in the front and rear and left and right directions. By adding a secondary beam 5 between the main beams 4, the support density of the platform panel 7 can be increased, and the support strength of the platform panel 7 can be increased; the secondary beam 5 is made of FRP material, which can reduce the weight while ensuring the strength, and can also improve its durability.

[0034] In some embodiments, the secondary beam connection node 3 has the same structure as the main beam connection node 2, except that the supporting short column 21 in the secondary beam connection node 3 is fixed on the roof surface 6 instead of corresponding to the structural column 1; the supporting short column 21, the high damping rubber pad 23 and the node short column 27 can also be eliminated, and the connection is only made through the component node 29.

[0035] In some embodiments, the main beam connection nodes and the secondary beam connection nodes are made of steel, aluminum or FRP.

[0036] In some embodiments, the cross-sections of the main beam 4 and the secondary beam 5 are box-shaped sections or H-shaped sections; specifically, the main beam 4 and the secondary beam 5 are inserted into the interior of the connecting sleeve, and are fixed with mounting bolts and nuts on the upper and lower sides.

[0037] In some embodiments, a grille plate 72 is provided at the top edge of the panel support system, and a mesh plate 71 is provided at the top center of the panel support system; the grille plate 72 and the mesh plate 71 can further reduce the weight of the platform panel 7 while ensuring the supporting strength; specifically, the mesh plate 71 is used in the approach and take-off areas, and the grille plate 72 is used in other areas.

[0038] In some embodiments, reinforcing ribs are provided on the back side of the grating plate 72 and the mesh plate 71, and the strength of the grating plate 72 and the mesh plate 71 can be improved by the reinforcing ribs; the back side of the grating plate 72 and the mesh plate 71 corresponding to the main beam connection node 2 and the secondary beam connection node 3 are treated with a lowering plate, that is, the height of the corresponding rib plate on the back is lowered, so that the platform panel 7 after laying forms a plane with a consistent elevation.

[0039] In some embodiments, Figure 5 As shown, the platform panel 7 at the top of the panel support system is provided with an apron logo 8, and the apron logo 8 is arranged on the top surface of the platform panel 7 in a matching manner.

[0040] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0041] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. An impact-resistant lightweight FRP apron structure, characterized by: It includes structural columns arranged in a matrix below the roof surface, main beam connection nodes corresponding to the structural columns are arranged on the roof surface, main beams are arranged between two adjacent main beam connection nodes in front and behind and in the left and right, the main beams and the main beam connection nodes are spliced ​​to form a panel support system, and the top of the panel support system is evenly laid with platform panels; The main beam connection node has a supporting short column fixedly arranged on the top of the roof surface corresponding to the structural column, the top of the supporting short column is provided with a high damping rubber pad, the top of the high damping rubber pad is provided with a node short column, the top of the node short column is provided with a component node, and the side of the component node is fixedly provided with a connecting sleeve matching the main beam; The ends of the main beams are fixedly assembled inside the corresponding connecting sleeves; The main beam and the platform panel are both made of FRP material.

2. The impact-resistant lightweight FRP apron structure according to claim 1, characterized in that: A bottom plate is arranged on the top of the supporting short column, an anchor bolt penetrating the bottom plate is fixedly arranged on the upper end of the supporting short column, and the high damping rubber pad is sleeved on the outside of the anchor bolt; A connecting plate is fixedly arranged at the bottom of the node short column, the upper end of the anchor bolt passes through the connecting plate, and a spring and a fixing nut are sequentially mounted on the anchor bolt above the connecting plate.

3. The impact-resistant lightweight FRP apron structure according to claim 2 is characterized in that: An anchor bolt hole is opened inside the high damping rubber pad along its axis, and the inner diameter of the anchor bolt hole is larger than the diameter of the anchor bolt to prevent the anchor bolt from interfering with the horizontal deformation of the high damping rubber pad.

4. The impact-resistant lightweight FRP apron structure according to claim 2, characterized in that: Horizontal limit baffles are evenly arranged on the top of the bottom plate surrounding the high damping rubber pad.

5. The impact-resistant lightweight FRP apron structure according to claim 1, characterized in that: A panel connector matching the platform panel is arranged on the top of the component node, and the platform panel is assembled and connected with the panel connector.

6. The impact-resistant lightweight FRP apron structure according to claim 1, characterized in that: Secondary beam connection nodes are provided in the middle of the square area formed by the four adjacent main beam connection nodes and in the middle between two adjacent main beam connection nodes in the front and rear and in the left and right directions; A secondary beam is provided between two adjacent secondary beam connection nodes in the front and rear and in the left and right directions; The secondary beam is made of FRP material.

7. The impact-resistant lightweight FRP apron structure according to claim 6, characterized in that: The main beam connection nodes and the secondary beam connection nodes are both made of steel, aluminum or FRP.

8. The impact-resistant lightweight FRP apron structure according to claim 6, characterized in that: The cross-sections of the main beam and the secondary beam are box-shaped cross-sections or H-shaped cross-sections.

9. The impact-resistant lightweight FRP apron structure according to claim 1, characterized in that: A grid plate is arranged at the top edge of the panel support system, and a mesh plate is arranged at the top center of the panel support system.

10. The impact-resistant lightweight FRP apron structure according to claim 9, characterized in that: The back sides of the grille plate and the mesh plate are both provided with reinforcing ribs.

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