Round wooden column-steel spherical crown piece-graphite-doped steel ball layer-along-column foundation stone seismic isolation system
The circular wooden column-steel spherical crown-graphite-coated steel bead layer-concave spherical band limiting seismic isolation system along the column base stone solves the problem of traditional circular wooden columns being difficult to reset after an earthquake, achieving self-resetting and seismic isolation effects in wooden structures, improving seismic toughness, and is suitable for both new and existing wooden structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional wooden circular columns connected to column bases in sliding seismic isolation structures are difficult to reset after an earthquake, resulting in poor seismic toughness and a lack of effective low-cost seismic isolation technology, especially in newly constructed cultural and tourism buildings.
The design incorporates a circular wooden column, a steel spherical crown, a layer of graphite-doped steel beads, and a concave spherical base stone for seismic isolation. By combining the steel spherical crown with the concave spherical base stone and utilizing the graphite-doped steel beads to reduce friction, the wooden column achieves self-resetting and positioning functions. Combined with a ring-shaped tempered glass sealing plate, this forms a sliding and self-resetting seismic isolation system.
This system achieves seismic isolation at the base of circular wooden columns to reduce the seismic load on the superstructure and self-resets after an earthquake, significantly improving the seismic toughness and structural toughness of wooden structures. It is suitable for existing and newly built wooden houses.
Smart Images
Figure CN121738320A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a seismic isolation system consisting of a circular wooden column, a steel spherical crown, a layer of graphite-doped steel beads, and a concave spherical surface with limiting features along the column base stone, belonging to the field of seismic isolation technology in civil engineering. Background Technology
[0002] Currently, traditional timber structures pose significant seismic safety risks, necessitating improvements in their seismic resilience. Resilience, also known as recoverability, describes a system's ability to maintain and restore its original function after being subjected to disturbances. Building seismic resilience refers to a building's ability to maintain and restore its original function after encountering a specific level of earthquake. Improving the seismic resilience of traditional timber structures can be achieved through seismic-resistant technologies, vibration reduction and isolation technologies, or a combination of both. The circular wooden column of the traditional wooden structure is its vertical load-bearing component. The bottom of the circular wooden column is placed on the column base stone. There are two structural forms for the connection between the bottom of the circular wooden column and the column base stone: (1) The upper surface of the column base stone is flat, and the bottom of the circular wooden column is placed directly on the column base stone. Under the action of earthquake, the bottom of the wooden column and the column base stone form a sliding isolation structure. This structure has the advantage of reducing the earthquake action transmitted to the upper structure by the isolation effect of the bottom of the circular wooden column under the action of earthquake. However, it has the defect that the circular wooden column cannot be reset after sliding after the earthquake. This has been confirmed by a large number of earthquake damages. The inability of the circular wooden column to be reset after the earthquake makes the structure unable to maintain and restore its original function, and the seismic toughness is poor. (2) A groove is set in the center of the upper surface of the column base stone. The bottom of the circular wooden column or the wooden column protruding the wooden tenon is embedded in the groove on the upper part of the column base stone. Under the action of earthquake, the bottom of the wooden column and the column base stone form a non-slip isolation structure. The bottom of the circular wooden column cannot reduce the horizontal earthquake action transmitted to the upper structure like the sliding isolation. Although the bottom of the circular wooden column does not slide after the earthquake and remains in the original position, the seismic isolation performance is poor. The key technical bottleneck in improving the seismic toughness of traditional round wooden columns lies in how to update the structure between the bottom of the round wooden column and the column base stone to a sliding self-resetting seismic isolation structure. There is an urgent need to develop a seismic isolation system between the bottom of the round wooden column and the column base stone that can both slide for seismic isolation and self-reset after an earthquake. This system has the advantages of reducing the transmission of seismic motion from the bottom of the round wooden column to the upper structure and self-resetting after an earthquake, thus improving the structural toughness and seismic resistance.
[0003] Modern timber structures combine earthquake resistance and thermal insulation with short construction cycles. In recent years, timber-framed houses have seen a gradual increase in their proportion of new construction in China due to their advantages such as environmental friendliness, energy conservation, and high construction efficiency. Currently, low-cost seismic isolation technology is severely lacking in newly constructed cultural and tourism timber structures. New cultural and tourism timber structures come in various shapes, employing round, square, L-shaped, T-shaped, and cross-shaped timber columns depending on different building and load-bearing requirements. Therefore, using a seismic isolation system with concave spherical base stones as a key technical feature for timber columns of different cross-sectional shapes is not only necessary to ensure the earthquake safety of the timber structure but also to ensure the safety of interior decoration systems and water and electricity facilities under strong earthquakes. This can effectively reduce post-earthquake repair costs and significantly improve the building's earthquake resilience.
[0004] When using timber frame structures or timber frame-timber wall panel structures for mountain and grassland cultural tourism buildings, the floor system at the bottom typically employs an elevated platform structure covered with bamboo or composite flooring. This is to prevent corrosion and moisture, adapt to the terrain, and protect the ecology, while also strengthening the connection between the frame columns. A seismic isolation system consisting of circular timber columns, steel ball caps, graphite-doped steel ball layers, and concave spherical bands with limiting elements along the column base is used between the elevated platform structure and the ground. Short timber columns with circular cross-sections need to be installed within the elevated height. The length of the short timber columns is related to the slope of the site. This system enables timber structures to maintain or restore their original functions under major earthquakes, significantly improving their seismic resilience. Summary of the Invention
[0005] The technical objective of this invention is to design a seismic isolation system consisting of a circular wooden column, a steel spherical crown, a layer of graphite-doped steel beads, and a concave spherical base stone with limiting edge, primarily used for seismic isolation and self-resetting of the bottom of a circular wooden column in a timber structure. This system comprises a circular wooden column, a steel spherical crown, a concave spherical base stone with limiting edge, a layer of graphite-doped steel beads, and an annular tempered glass sealing plate. The steel spherical crown is welded from a steel spherical crown, an annular steel cover plate, a circular steel plate hoop, and a circular steel pipe. A rigid round piece of wood is embedded inside the circular steel pipe and inserted into a circular hole at the bottom of the wooden column, while the circular steel plate hoop is fitted onto the bottom of the wooden column for connection. The layer of graphite-doped steel beads reduces the friction between the steel spherical crown and the concave spherical surface of the base stone. The concave spherical surface of the base stone allows the circular wooden column to self-reset after an earthquake, and the limiting edge of the base stone restricts excessive displacement of the bottom of the circular wooden column during vibration. The annular tempered glass sealing plate provides a waterproof seal. This seismic isolation system has the advantages of reducing the seismic force on the superstructure by isolating the bottom of the circular wooden column and achieving structural toughness and seismic resistance through self-resetting after the earthquake.
[0006] The technical solution adopted in this invention is a circular wooden column-steel spherical crown-graphite-coated steel bead layer-concave spherical base stone seismic isolation system: comprising: a circular wooden column, a hollow steel spherical crown, and a concave spherical base stone with a limiting edge; the circular wooden column and the hollow steel spherical crown are connected by an embedded connection; the upper part of the concave spherical base stone has a groove, and the groove is vertically processed into a concave spherical surface, with the circumference of the concave spherical surface being a circular limiting edge; the circular wooden column and the circular limiting edge are sealed and connected by a ring-shaped tempered glass sealing plate; the surface of the concave spherical surface is filled with a graphite-coated steel bead layer; Furthermore, a cylindrical hole is machined in the center of the bottom of the circular wooden column; the hollow steel spherical crown is formed by welding a steel spherical crown and a circular steel plate hoop together; the surface of the steel spherical crown is a convex spherical structure corresponding to the concave spherical surface, and the curvature of the convex spherical surface is equal to that of the concave spherical surface; the circular steel plate hoop covers and embeds the outer surface of the circular wooden column; a horizontally arranged annular steel cover plate is provided between the bottom of the circular wooden column and the steel spherical crown, and a circular steel pipe is vertically welded in the center of the annular steel cover plate, the bottom of the circular steel pipe being welded to the surface of the steel spherical crown; the inside of the circular steel pipe is filled with embedded hard round wood; the circular steel pipe is embedded and connected to the cylindrical hole.
[0007] The circular wooden column is a circular cross-section wooden column made from logs such as pine. The bottom center of the circular wooden column has a hole with a diameter of not less than 1 / 2 the diameter of the circular wooden column and a depth of not less than 1.5 times the diameter.
[0008] The steel spherical crown component is constructed by welding a steel spherical crown, an annular steel cover plate, a steel plate hoop, and a round steel tube passing through a hole in the center of the annular steel cover plate. Hardwood, such as oak or ebony, is embedded inside the round steel tube. The outer diameter of the round steel tube matches the diameter of the hole in the annular steel cover plate and the diameter of the hole at the bottom of the round wooden column. The height of the round steel tube above the annular steel cover plate is equal to the depth of the hole at the bottom of the round wooden column. The curvature of the steel spherical crown is equal to the curvature of the concave spherical surface of the column base. All steel materials used are 304 stainless steel. The forming process involves first placing the round steel tubes symmetrically at the bottom of the steel spherical crown and welding them together. Then, the annular steel cover plate is fitted onto the round steel tube and welded to both the round steel tube and the periphery of the steel spherical crown. Next, the steel plate hoop is symmetrically placed on the upper part of the annular steel cover plate and welded along its periphery. Finally, the hardwood is coated with structural adhesive and embedded in the steel tube, flush with the round steel tube.
[0009] The connection between the steel ball crown component and the bottom of the circular wooden column is achieved by applying structural adhesive to the surface of the steel pipe of the embedded hard round wood that protrudes from the annular steel cover plate, the upper surface of the annular steel cover plate, and the inner surface of the steel plate hoop, and then embedding it into the bottom of the circular wooden column. After the connection, the circular steel plate hoop of the steel ball crown component constrains the bottom of the circular wooden column to prevent cracking.
[0010] The concave spherical column base stone is a round, drum-shaped, or square column base stone with a cylindrical groove on the upper part, which is processed from granite such as bluestone and the groove is processed downward into a concave spherical surface.
[0011] The graphite-doped steel ball layer is a mixture of graphite and 304 stainless steel balls with a diameter of 2mm-3mm. The graphite acts as a lubricant, and the rolling of the steel balls reduces friction.
[0012] The aforementioned annular tempered glass cover plate is an 8mm thick annular tempered glass cover plate. A 10mm x 10mm square sponge strip is adhered around the perimeter of the annular tempered glass cover plate. The sponge strip is recessed 10mm from the outer edge to create space for sealant. The square sponge strip prevents the annular tempered glass from colliding with the column base's limiting edge during the sliding of the wooden column. During construction, the annular tempered glass cover plate is first inserted approximately 300mm from the bottom of the column. Four symmetrically arranged self-tapping screws and small wooden blocks are used to connect the cover plate to the wooden column below, supporting the cover plate. After the seismic isolation system is installed, the self-tapping screws and small wooden blocks are removed, and the annular tempered glass cover plate is lowered into place. Finally, the joint between the annular tempered glass cover plate and the wooden column, as well as the area where the square sponge strip contacts the column base with the concave spherical limiting edge, is sealed with silicone sealant.
[0013] Compared with the prior art, the present invention relates to a circular wooden column-steel spherical crown-graphite-doped steel bead layer-concave spherical band limiting seismic isolation system along the column base stone, which has the following advantages: 1. The steel spherical crown and concave spherical base stone of the circular wooden column-steel spherical crown-graphite-doped steel bead layer-concave spherical limiting column base stone seismic isolation system of the present invention can be standardized in design and industrialized in production, with low cost, convenient assembly and construction, and easy to promote and apply.
[0014] 2. The steel ball crown of this seismic isolation system is made of 304 stainless steel, the concave spherical limit column base stone is made of granite such as bluestone, and the graphite mixed with 304 stainless steel beads has stable physical and chemical properties and good durability.
[0015] 3. The graphite-doped steel ball layer of this seismic isolation system can reduce the friction between the steel ball cap and the concave spherical surface of the column base stone. The concave spherical surface of the column base stone plays a role in the self-resetting of the circular wooden column under its own weight after the earthquake. The limiting edge of the column base stone plays a role in restricting excessive displacement of the bottom of the circular wooden column during the vibration. This seismic isolation system has the functions of seismic isolation at the bottom of the circular wooden column, reducing the seismic effect on the superstructure, and self-resetting after the earthquake, thus achieving structural toughness and seismic resistance.
[0016] 4. This seismic isolation system can be used for the seismic isolation and renovation of the base of circular wooden columns in existing wooden structures, as well as for the seismic isolation of circular wooden columns in newly built wooden structures. The renovated circular wooden columns have the functions of slip isolation, limiting excessive slippage and self-resetting after an earthquake, significantly improving the seismic toughness of existing wooden columns. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a seismic isolation system consisting of a circular wooden column, a steel spherical crown, a layer of graphite-doped steel beads, a concave spherical base stone with limiting function, and an annular tempered glass sealing plate.
[0018] Figure 2 This is a schematic diagram of a steel ball crown component.
[0019] Figure 3 This is a schematic diagram of a concave spherical surface with a limiting feature along the column base stone. Detailed Implementation
[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0021] To achieve the above objectives, the present invention adopts the following technical solution: Circular wooden column - steel spherical crown component - graphite-doped steel bead layer - concave spherical surface with limiting edge seismic isolation system along the column base stone Figure 1 Steel ball crown component Figure 2 Concave spherical surface with limiting along the column base stone Figure 3 1. Circular wooden column; 2. Circular wooden column bottom cylindrical hole; 3. Steel ball crown; 4. Steel ball crown; 5. Circular steel cover plate; 6. Steel plate hoop; 7. Circular steel pipe; 8. Hard round wood; 9. Graphite-doped steel bead layer; 10. Concave spherical surface with limiting edge column base stone; 11. Circular limiting edge; 12. Concave spherical surface; 13. Circular tempered glass sealing plate.
[0022] The circular wooden post 1 is a circular cross-section wooden post made from pine or other logs. A cylindrical hole 2 is machined at the bottom of the circular wooden post. The diameter of the cylindrical hole 2 at the bottom of the circular wooden post is not less than 1 / 2 of the diameter of the circular wooden post, and the depth of the hole is not less than 1.5 times the diameter of the circular hole.
[0023] The hollow steel spherical crown component 3 is constructed by welding a steel spherical crown 4, an annular steel cover plate 5, a steel plate hoop 6, and a round steel pipe 7 passing through a hole in the center of the annular steel cover plate. A hardened round piece of wood 8 is embedded inside the round steel pipe 7. All steel materials used are 304 stainless steel. The forming process of the hollow steel spherical crown component 3 involves first symmetrically placing the round steel pipes 7 at the bottom of the steel spherical crown 4 and welding them together. Then, the annular steel cover plate 5 is fitted onto the round steel pipe 7 and welded to both the round steel pipe 7 and the periphery of the steel spherical crown 4. Next, the steel plate hoop 6 is symmetrically placed on top of the annular steel cover plate 5 and welded along its periphery. Finally, the hardened round piece of wood 8 is coated with structural adhesive and embedded in the steel pipe, flush with the round steel pipe.
[0024] The steel spherical crown 4 is a hollow spherical stainless steel part, and the curvature of the steel spherical crown 4 is equal to the curvature of the concave spherical surface of the column base stone.
[0025] The annular steel cover plate 5 is an annular stainless steel part. The inner diameter of the annular steel cover plate 5 is the same as the outer diameter of the round steel pipe 7. The annular steel cover plate 5 is welded to the steel ball crown 4 and the steel plate hoop 6 respectively.
[0026] The steel plate hoop 6 is welded to the annular steel cover plate 5 and its function is to restrain the cracking of the end of the round wooden column.
[0027] The round steel pipe 7 is welded to the steel ball crown 4 and the annular cover plate 5 respectively, and after being embedded with hard round wood, it is connected to the round hole at the bottom of the round wooden column.
[0028] The hard round wood 8 is a round wood embedded in the round steel pipe 7. The hard round wood is made of hardwood such as oak and mulberry. After the hard round wood 8 is coated with structural adhesive, it is embedded in the round steel pipe 7 and is flush with the round steel pipe 7.
[0029] The graphite-doped steel ball layer 9 is a mixture of graphite and 304 stainless steel balls with a diameter of 2mm-3mm. It is laid between the concave spherical surface 12 of the concave spherical base stone 10 and the steel ball crown 4. The graphite plays a lubricating role, and the rolling of the steel balls reduces the friction.
[0030] The concave spherical limiting edge column base stone 10 is a round pier-shaped column base stone, drum-shaped column base stone, or square pier-shaped column base stone with a cylindrical groove on the upper part and a concave spherical surface 12 facing downwards, and a circular limiting edge 11 formed by the upper cylindrical groove. It is made of granite such as bluestone.
[0031] The aforementioned annular tempered glass sealing plate 13 is made by cutting ordinary annealed glass into an annular shape according to the required dimensions, heating it to near its softening point, and then rapidly and uniformly cooling it.
[0032] like Figure 1-3 As shown, the circular wooden column-steel spherical crown-graphite-coated steel bead layer-base stone seismic isolation system includes: a circular wooden column 1, a hollow steel spherical crown 3, and a concave spherical base stone 10 with a limiting edge; the circular wooden column 1 and the hollow steel spherical crown 3 are connected by an upper and lower embedded connection; the upper part of the concave spherical base stone 10 has a groove, and the groove is vertically processed into a concave spherical surface 12, the circumference of the concave spherical surface 12 is a circular limiting edge 11, and the circular wooden column 1 and the circular limiting edge 11 are sealed and connected by a ring-shaped tempered glass sealing plate 13; the surface of the concave spherical surface 12 is filled with a graphite-coated steel bead layer 9; Furthermore, a cylindrical hole 2 is machined in the middle of the bottom of the circular wooden column 1; the hollow steel spherical crown 3 is formed by welding a steel spherical crown 4 and a circular steel plate hoop 6 together; the surface of the steel spherical crown 4 is a convex spherical structure corresponding to the concave spherical surface 12, and the curvature of the convex spherical surface is equal to the curvature of the concave spherical surface 12; the circular steel plate hoop 6 covers the outer surface of the embedded circular wooden column 1; a horizontally arranged annular steel cover plate 5 is provided between the bottom of the circular wooden column 1 and the steel spherical crown 4, and a circular steel pipe 7 is vertically welded in the middle of the annular steel cover plate 5, and the bottom of the circular steel pipe 7 is welded to the surface of the steel spherical crown 4; the inside of the circular steel pipe 7 is filled with embedded hard round wood 8; the circular steel pipe 7 is embedded and connected to the cylindrical hole 2.
[0033] Furthermore, structural adhesive is applied to the inner surface of the circular steel plate hoop 6 and the upper surface of the annular steel cover plate 5. The circular wooden column 1 is embedded in the circular steel plate hoop 6 for connection. The annular steel cover plate 5 forms a constraint on the bottom of the hollow steel spherical crown 3 to prevent cracking.
[0034] Furthermore, the hardwood log 8 is made of hardwoods such as oak and ebony; Furthermore, the diameter of the round steel pipe 7 is the same as the diameter of the round hole at the bottom of the round wooden column, and the height of the round steel pipe 7 above the annular steel cover plate 5 is equal to the depth of the round hole 2; the hollow steel spherical crown 3 is made of 304 stainless steel.
[0035] Furthermore, the circular wooden column 1 is a circular cross-section wooden column processed from logs such as pine, the diameter of the cylindrical hole 2 is not less than 1 / 2 the diameter of the circular wooden column 1, and the depth of the cylindrical hole 2 is not less than 1.5 times the diameter of the circular hole.
[0036] Furthermore, the round steel pipe 7 is placed at the bottom of the steel ball crown 4 and welded, the annular steel cover plate 5 is inserted into the round steel pipe 7 and welded to the periphery of the round steel pipe 7 and the steel ball crown 4, the round steel plate hoop 6 is placed on the upper part of the annular steel cover plate 5 and welded along the periphery, and the hard round wood 8 is coated with structural adhesive and embedded in the round steel pipe 7 and flush with the round steel pipe 7.
[0037] Furthermore, the concave spherical limiting column base stone 10 is made of granite such as bluestone; the lower part of the concave spherical limiting column base stone 10 is a round pier-shaped column base stone, a drum-shaped column base stone, or a square pier-shaped column base stone.
[0038] Furthermore, the graphite-doped steel ball layer 9 is a mixture of graphite and 304 stainless steel balls with a diameter of 2mm-3mm; the graphite acts as a lubricant, and the rolling of the 304 stainless steel balls reduces friction.
[0039] Furthermore, the thickness of the annular tempered glass sealing plate 13 is 4-18mm, and a 10mm×10mm square sponge strip is pasted around the perimeter of the annular tempered glass sealing plate 13. The square sponge strip is pasted 10mm inward from the outer edge to provide space for glass glue sealing. The square sponge strip ensures that the annular tempered glass 13 does not collide with the annular limiting edge 11 during the sliding of the circular wooden column 1 at the bottom of the column.
[0040] During construction, first insert the annular tempered glass sealing plate 13 into the circular wooden column 1 at a height of not less than 300mm from the bottom of the column. Then, use four symmetrically arranged self-tapping screws on the circular wooden column 1 below the annular tempered glass sealing plate 13 to connect it to the circular wooden column 1, thus supporting the annular tempered glass sealing plate 13. After the seismic isolation system is installed, remove the self-tapping screws and wooden blocks, and then lower the annular tempered glass sealing plate 13 into place. After that, seal the joint between the annular tempered glass sealing plate 13 and the circular wooden column 1, as well as the position of the square sponge strip that contacts the concave spherical limiter along the column base stone 10 with glass glue.
[0041] When updating the seismic isolation system at the base of the circular wooden columns of an existing wooden structure, the dimensions of the circular wooden columns and the column base stones are first measured. The stress requirements are calculated based on the seismic fortification intensity. The dimensions of each component of the steel ball crown and the thickness of the steel plate are determined based on the dimensions of the existing circular wooden columns and the stress requirements. The dimensions of the concave spherical band limiter at each part of the column base stone and the diameter of the steel balls with graphite-doped steel ball layers are also determined. The stress calculation of the seismic isolation system is then performed, and the components are prepared, transported, and assembled on-site. Construction process: First, fix the existing circular wooden column with a rigid frame. Then, drill a hole in the middle of the bottom section of the circular wooden column and install a steel ball crown. Next, replace the original column base stone with a concave spherical column base stone with a limiting edge. First, lay a small amount of graphite-mixed steel balls between the steel ball crown and the concave spherical surface of the column base stone. After all are in place, fill the space between the steel ball crown and the limiting edge of the column base stone with graphite-mixed steel balls with a thickness of not less than 20mm. Finally, after the annular tempered glass sealing plate is in place, seal it with glass glue to the circular wooden column and the upper edge of the column base stone.
[0042] For newly constructed timber structures, the dimensions of the circular timber columns, the dimensions of each component of the steel ball crown and the thickness of the steel plate, the dimensions of the concave spherical limiter along each part of the column base stone, and the diameter of the steel balls mixed with graphite steel balls are first determined according to the structural design and stress requirements. Then, the stress calculation of the seismic isolation system is performed, and the components are prepared, transported and assembled on site.
[0043] Compared with the prior art, the system structure of the present invention has the following characteristics: 1. The core force transmission and isolation path (vertical direction and minor earthquakes) is the most important force transmission path of the system, from top to bottom:
[0044] 1. Circular wooden column, 3. Hollow steel spherical crown, 10. Concave spherical base stone with limiting edge.
[0045] The lower hemisphere of the steel spherical crown 4 rests on the concave spherical surface 12 at the top of the concave spherical base stone 10 with a limiting feature.
[0046] A layer 9 of graphite-doped steel balls is laid at the bottom or around the concave spherical surface 12. The graphite acts as a lubricant, while the steel balls allow for minor rolling and deformation, together dissipating seismic energy. Under normal conditions or during minor earthquakes, the load is smoothly transferred to the foundation through this spherical contact path, while allowing for minor rotation and sliding to release internal forces within the structure.
[0047] 2. Lateral restraint and limiting system (moderate to major earthquakes); This system prevents excessive displacement of the isolation layer. The concave spherical band extends upward from the edge of the column base stone 10, forming a circular limiting edge 11.
[0048] In the event of a large horizontal earthquake, the hollow steel spherical crown 3 or its connected components will come into contact with the limiting edge 11. Through collision and friction, the maximum amount of slippage at the bottom of the wooden column is limited, preventing beam collapse or instability.
[0049] The annular tempered glass sealing plate 13 forms a sealed cover. Its primary function is not load-bearing, but rather: Protection: Prevents dust, rainwater, insects and ants from entering the precision spherical crown and steel ball layer.
[0050] Observation: Facilitates the inspection of the condition of internal components.
[0051] Provide a secondary limit: as a last line of flexible barrier. 3. The wooden column reinforcement and steel ball cap locking system ensure a reliable connection between the upper circular wooden column and the seismic isolation device:
[0052] A circular steel plate hoop 6 is placed around the bottom of the circular wooden column 1 to prevent the wooden column from splitting.
[0053] Hardwood logs 8 may be used as filler, tightly embedded inside the hollow steel ball crown 3, and then wooden posts 1 are inserted into them to form a tight rebar connection.
[0054] An annular steel cover plate 5 covers the top of the hollow steel spherical crown 3 and is connected to the round steel pipe 7 by bolts or welding.
[0055] The lower end of the round steel pipe 7 may be welded to the steel plate hoop 6 or the hollow steel spherical crown 3. The annular steel cover plate 5, the round steel pipe 7, and the circular steel plate hoop 6 form a sleeve that firmly locks the bottom of the round wooden column 1 to the hollow steel spherical crown 3, ensuring that the two work together.
[0056] In daily life and minor earthquakes: the load dissipates energy through friction via the sliding of the steel spherical crown 4 and the concave spherical surface 12, as well as the rolling of the graphite-doped steel ball layer 9, thereby reducing the seismic force transmitted to the wooden column.
[0057] Moderate and major earthquakes: When the displacement reaches the design value, the hollow steel spherical crown 3 collides with the annular limiting edge 11, changing from a flexible isolation state to a rigid limiting state, thus preventing structural collapse.
[0058] The reinforcement system uses steel plate hoops 6 and round steel pipes 7 to ensure the connection does not fail; the enclosed system uses annular steel cover plates 5 to protect the internal precision components.
[0059] This design ingeniously integrates three concepts: sliding isolation, ball bearing isolation, and limiting energy dissipation. It is an innovative combination of the wisdom of traditional Chinese building column bases and modern seismic isolation technology.
[0060] The above is a typical embodiment of the present invention, and the implementation of the present invention is not limited thereto.
Claims
1. A circular wooden column-steel spherical crown-graphite-doped steel bead layer-seismic isolation system along the column base stone, characterized in that: include: A circular wooden column (1), a hollow steel spherical crown (3), and a concave spherical base stone with a limiting edge (10); the circular wooden column (1) and the hollow steel spherical crown (3) are connected in an embedded manner; the upper part of the concave spherical base stone (10) has a groove and the groove is processed into a concave spherical surface (12) in the vertical direction, and the circumference of the concave spherical surface (12) is a circular ring limiting edge (11), and the circular wooden column (1) and the circular ring limiting edge (11) are sealed and connected by a ring tempered glass sealing plate (13); the surface of the concave spherical surface (12) is filled with a layer of graphite-doped steel beads (9).
2. The circular wooden column-steel spherical crown-graphite-doped steel bead layer-seismic isolation system along the column base stone according to claim 1, characterized in that: A cylindrical hole (2) is machined in the middle of the bottom of the circular wooden column (1); the hollow steel spherical crown (3) is formed by welding a steel spherical crown (4) and a circular steel plate hoop (6) together; the surface of the steel spherical crown (4) is a convex spherical structure corresponding to the concave spherical surface (12), and the curvature of the convex spherical surface is equal to the curvature of the concave spherical surface (12); the circular steel plate hoop (6) covers the outer surface of the circular wooden column (1) that is embedded and connected; a horizontally arranged annular steel cover plate (5) is provided between the bottom of the circular wooden column (1) and the steel spherical crown (4), and a circular steel pipe (7) is vertically welded in the middle of the annular steel cover plate (5), and the bottom of the circular steel pipe (7) is welded to the surface of the steel spherical crown (4); the inside of the circular steel pipe (7) is filled with embedded hard round wood (8); the circular steel pipe (7) is embedded and connected to the cylindrical hole (2).
3. The circular wooden column-steel spherical crown-graphite-doped steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The inner surface of the circular steel plate hoop (6) and the upper surface of the annular steel cover plate (5) are coated with structural adhesive. The circular wooden column (1) is embedded in the circular steel plate hoop (6) for connection. The annular steel cover plate (5) forms a constraint on the bottom of the hollow steel spherical crown (3) to prevent cracking.
4. The circular wooden column-steel spherical crown-graphite-doped steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The hardwood log (8) is made of oak or pea wood.
5. The circular wooden column-steel spherical crown-graphite-coated steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The diameter of the round steel pipe (7) is the same as the diameter of the round hole at the bottom of the round wooden column. The height of the round steel pipe (7) above the annular steel cover plate (5) is equal to the depth of the round hole (2). The hollow steel spherical crown (3) is made of 304 stainless steel.
6. The circular wooden column-steel spherical crown-graphite-coated steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The circular wooden column (1) is a circular cross-section wooden column made from pine logs, and the diameter of the cylindrical hole (2) is not less than 1 / 2 the diameter of the circular wooden column (1).
7. The circular wooden column-steel spherical crown-graphite-coated steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The round steel pipe (7) is placed at the bottom of the steel ball crown (4) and welded. The annular steel cover plate (5) is inserted into the round steel pipe (7) and welded to the periphery of the round steel pipe (7) and the steel ball crown (4). The circular steel plate hoop (6) is placed on the upper part of the annular steel cover plate (5) and welded along the periphery. The hard round wood (8) is coated with structural adhesive and then embedded in the round steel pipe (7) and flush with the round steel pipe (7).
8. The circular wooden column-steel spherical crown-graphite-doped steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The concave spherical base stone (10) with limiting edge is made of bluestone; the lower part of the concave spherical base stone (10) with limiting edge is a round pier-shaped base stone, a drum-shaped base stone, or a square pier-shaped base stone.
9. The circular wooden column-steel spherical crown-graphite-coated steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The graphite-doped steel ball layer (9) is a mixture of graphite and 304 stainless steel balls with a diameter of 2mm-3mm; the graphite acts as a lubricant, and the rolling of the 304 stainless steel balls reduces friction.
10. The circular wooden column-steel spherical crown-graphite-doped steel bead layer-seismic isolation system along the column base stone according to claim 2, characterized in that: The thickness of the annular tempered glass sealing plate (13) is 4-18mm. A 10mm×10mm square sponge strip is pasted around the annular tempered glass sealing plate (13). The square sponge strip is pasted 10mm inward from the outer edge to provide space for glass glue sealing. The square sponge strip ensures that the annular tempered glass (13) does not collide with the annular limiting edge (11) during the sliding of the circular wooden column (1) at the bottom of the column. During construction, the annular tempered glass sealing plate (13) is first inserted into the bottom of the circular wooden column (1) at a height of not less than 300mm. Four symmetrically arranged self-tapping screw small wooden blocks are used to connect the annular tempered glass sealing plate (13) to the circular wooden column (1) below the circular tempered glass sealing plate (13) to support the circular tempered glass sealing plate (13). After the seismic isolation system is installed, the self-tapping screw small wooden blocks are removed and the annular tempered glass sealing plate (13) is lowered into place. Then, the joint between the annular tempered glass sealing plate (13) and the circular wooden column (1) and the position of the square sponge strip that contacts the concave spherical belt along the column base stone (10) are sealed with glass glue.