Wooden connection structure for seismic resistance in pile foundations

Abstract

A wooden connection structure for seismic resistance in pile foundations includes a base, a supporting pile and four seismic isolation frames; the base is provided with a central groove and a rectangular groove; the supporting pile includes a connecting column, a supporting disc and a central square column; the seismic isolation frame includes a wooden frame and a guide circular tube, the wooden frame is a mortise-and-tenon joint structure; the four seismic isolation frames are respectively sleeved in four rectangular grooves; a lower part of the central square column is sleeved in the square groove, four side facades of the central square column are in contact with side facades of the four seismic isolation frames respectively; and lower parts of the four guide cylinders are respectively sleeved in four guide circular tubes. The wooden connection structure allows for the comprehensive absorption and dispersion of seismic wave energy.

Description

CROSS REFERENCE TO THE RELATED APPLICATIONS

[0001] This application is based upon and claims priority to Chinese Patent Application No. 202410127529.3, filed on Jan. 30, 2024, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present invention pertains to the field of seismic engineering for buildings, specifically focusing on a wooden connection structure for seismic resistance in pile foundations.BACKGROUND

[0003] The seismic design of buildings is an essential aspect of construction engineering, particularly in regions prone to frequent earthquakes. Conventional seismic technology primarily employs reinforced concrete and other rigid materials to improve the stability and seismic resilience of building structures. Vibration isolation systems typically include reinforced concrete columns, beams, and walls, which collectively absorb earthquake forces through rigid connections or enhance the building's inherent seismic capacity, thereby reducing the impact of seismic activity. Additionally, there are approaches that incorporate seismic isolation technology, such as the installation of seismic isolation bearings or specialized foundation treatment techniques, which function to isolate or mitigate the transmission of ground motion to the building structure during an earthquake.

[0004] The seismic designs in prior art generally offer reliable safety in most situations, with application scenarios encompassing residential structures, commercial buildings, and various critical infrastructure projects. Yet, the use of materials like reinforced concrete not only elevates construction costs but also increases the building's weight, which can limit both the aesthetics and design flexibility. Further, while conventional seismic technology generally ensures the structural safety of buildings during earthquakes, rigid materials such as reinforced concrete primarily depend on their inherent strength and rigidity. This can result in structural damage under intense seismic events, particularly when the vibration frequency aligns with the building's natural frequency. As such, the overall design and construction standards must be more rigorous to effectively mitigate the direct impact of seismic waves, leading to higher construction and associated costs.SUMMARY

[0005] In response to the limitations of prior art, the present invention introduces a wooden connection structure for seismic resistance in pile foundations. This design aims to address the complexities, excessive weight, and high design or construction costs

[0006] In order to achieve the objective of the present invention, a wooden connection structure for seismic resistance in pile foundations is provided. The innovation of this invention includes the following components: a base, a supporting pile, and four seismic isolation frames;

[0007] base includes an inner base and a peripheral plate, the peripheral plate is sleeved on an outer peripheral surface of the inner base, a cross groove is arranged in the middle of a top surface of the inner base, an axial direction of the cross groove is vertically arranged, the cross groove includes a central groove and four rectangular grooves, the four rectangular grooves are uniformly distributed in a circumferential direction, each rectangular groove is in communication with the central groove, a square groove is arranged in a the center of a bottom surface of the central groove, and the axial direction of the square groove is vertically arranged;

[0008] the supporting pile includes a connecting column, a supporting disc and a central square column that are successively connected from top to bottom, wherein the connecting column is arranged in the middle of an upper surface of the supporting disc, and the central square column is arranged in the middle of the lower surface of the supporting disc; four abutment bosses are further arranged on the lower surface of the supporting disc, the four abutment bosses are uniformly distributed in the circumferential direction of the supporting disc, the positions of the four abutment bosses correspond one-to-one with the positions of four rectangular grooves, and each abutment boss's size and shape are matched to those of its corresponding rectangular groove; a guide cylinder is provided on a lower surface of each of the abutment bosses, and an axial direction of the guide cylinder is vertically arranged;

[0009] the seismic isolation frame includes a wooden frame and a guide circular tube; the wooden frame is a mortise-and-tenon joint structure composed of multiple wood blocks, the middle of the wooden frame is provided with a central channel passing through, and the central channel is vertically arranged, an outer diameter of the guide circular tube is matched with an inner diameter of the central channel, and the guide circular tube is sleeved in the central channel; the inner diameter of the guide circular tube is matched with the outer diameter of the guide cylinder;

[0010] the four seismic isolation frames are respectively sleeved in four rectangular grooves, each side facade of a single rectangular groove is in contact with the seismic isolation frame, the top surface of the seismic isolation frame is lower than the top surface of the inner base, the bottom of the guide circular tube is fixedly connected to the bottom of the rectangular groove; the lower part of the central square column is sleeved in the square groove, four side facades of the central square column are in contact with side facades of the four seismic isolation frames respectively, an outer peripheral surface of the central square column is spaced with a side wall of the central groove; the four abutment bosses are respectively sleeved in four rectangular grooves, a lower side of the abutment bosses is in contact with the top surface of the wooden frame, and lower parts of the four guide cylinders are respectively sleeved in four guide circular tubes.

[0011] As an optimization, the wooden frame is configured as a multi-layer staggered laminated structure, each layer includes two wood blocks that are parallel to each other in the longitudinal direction, the wood blocks of adjacent two layers are perpendicular to each other in the longitudinal direction, and the wood blocks of the adjacent two layers are interconnected using a mortise-and-tenon joint method.

[0012] As an optimization, two wood blocks separated by only one layer and positioned relative to each other are defined as a support group; two cushion blocks are arranged between the two wood blocks controlled by one single support group, the two cushion blocks are arranged at both ends of the wood block, and upper and lower surfaces of the cushion block are in contact with upper and lower wood blocks respectively.

[0013] As an optimization, two press blocks are arranged at each end of the wood block on the top layer, and two press blocks at one end of the wood block are arranged on two side facades of the wood block.

[0014] As an optimization, an axis line of the connecting column, the supporting disc and the central square column is coaxially arranged.

[0015] As an optimization, the top surface of the peripheral plate is higher than the top surface of the inner base, a damping washer is arranged between the supporting disc and the peripheral plate, an inner peripheral surface of the damping washer is in contact with the outer peripheral surface of the supporting disc, the outer peripheral surface of the damping washer is in contact with the inner peripheral surface of the peripheral plate, and the damping washer is made of elastic material.

[0016] As an optimization, the outer peripheral surface of the peripheral plate is composed of multiple rectangular surfaces; the peripheral plate is made of stainless steel plate.

[0017] A principle of the present invention is as follows:

[0018] in the present invention, the base, supporting pile, and seismic isolation frame are designed with a rational structural configuration, the three parts of the structure are skillfully integrated into a unified pile foundation structure, which can effectively absorb and disperse the energy of seismic waves, thereby allowing a building to achieve the objective of damping and seismic resistance. Specifically:

[0019] the design of the cross groove cavity in the base not only reduces the weight of the structure, but also provides a necessary moving space for the supporting pile, when an earthquake occurs, the supporting pile is allowed to move along the X, Y, Z triaxial direction, allowing the supporting pile to have greater freedom of motion, thereby absorbing and dispersing the energy of seismic waves, reducing the impact on the building body, and effectively improving the seismic capacity of the entire building. This design also has significant advantages in reducing the weight of the structure and reducing the cost of materials. As an optimization, the peripheral plate further enhances the overall stability and durability of the base, the polygonal peripheral plate provides more edges and angles than a conventional circle, increases the friction and stability between the entire base and the ground through more contact with the ground, and also provides additional protection to make the base more resistant to corrosion and wear. The peripheral plate is closely adhered to the outer side of the inner base to form a strong protective layer. This layer effectively safeguards the base from corrosion and damage, particularly in harsh environmental conditions such as high humidity or salt fog environments. As a result, the seismic performance and long-term durability of buildings are significantly enhanced. In addition, the top surface of the peripheral plate is higher than the top surface of the inner base, so as to provide additional structural support for the base, and the resistance to transverse vibration is increased through an extension part of the peripheral plate. The top part of the inner base is provided with a damping washer abutting against the inner wall of the peripheral plate to form an effective vibration absorption and isolation system, the damping washer can effectively absorb and reduce the influence of vibration energy transmission to the supporting pile when a strong earthquake occurs in transverse waves (in the x and y directions), and the direct impact caused by the earthquake can be significantly reduced through the natural elasticity and damping property of the elastic material, thereby protecting the entire building structure from serious damage.

[0020] The seismic isolation frame is the core of the present invention; it employs a wooden frame with a mortise-and-tenon structure known for its excellent buffering and seismic characteristics. As an optimization, the wooden frame in this invention features a multi-layer staggered laminated structure, wherein adjacent layers of wood blocks are vertically clamped to one another to create an effective seismic wooden support structure. The laminated arrangement enhances the flexibility and elasticity of the wooden frame, enabling it to absorb and disperse seismic forces more efficiently during an earthquake. When seismic vibrations are transmitted to these supporting parts, the staggered laminated configuration ensures that the seismic forces are distributed across different layers of wood blocks. This design allows the wood blocks to move and swing relatively within a certain range, which aids in absorbing and dispersing the seismic energy more effectively, thereby reducing the impact and potential damage to the entire structure. Additionally, this structure is less prone to breakage or damage under seismic force, significantly improving the overall durability and reliability of the structure. Furthermore, a cushion block is arranged between the two blocks of each support group, which can absorb the vibration energy to a certain extent and act as a buffer to help reduce the direct impact of the seismic force on the whole wooden frame. Meanwhile, the cushion block can avoid the separation of each block and increase the self-centering effect of the whole wooden frame. Additionally, the press blocks are positioned at both ends of the wood blocks on the top layer; this arrangement ensures that the pressure from the upper building is uniformly and stably transmitted to the lower structure. This configuration guarantees that all wood blocks remain tightly clamped together during an earthquake, enhancing the combined strength and overall stability of the entire structure. When an earthquake occurs, this setup helps limit excessive movement between the wood blocks, reducing structural damage and facilitating the cooperative absorption and dispersion of vibration energy.

[0021] As a supporting pile connecting the upper and lower parts, the upper connecting column of the supporting pile is used to connect to the building, and the supporting disc is used to transfer the gravity of the building to the supporting pile and the base; the bottom of the central square column extends to the square groove of the central groove ground of the inner base, thus providing additional stable support in the center of the structure; each outer wall of the central square column abuts against the side of each seismic isolation frame, so that the central square column will not be displaced during the vibration process; meanwhile, this configuration simultaneously achieves the limiting function of the seismic isolation frame, enhancing the stability of the inner cavity structure of the entire inner base, while providing the necessary space for the supporting pile to move and adjust in various directions during an earthquake; in addition, the guide cylinder and the guide circular tube interact with the seismic isolation frame, which can further effectively disperse the seismic force; the guide circular tube is fixedly connected to the bottom of the rectangular groove, which provides a stable anchoring point for the whole isolation structure; the guide cylinder can be actively inserted into the guide circular tube and can abut against the inner wall of the wooden frame of the central channel, allowing it to move smoothly in the longitudinal wave direction during an earthquake, avoiding the undesirable situation where the guide cylinder may only contact a single wooden block due to slight deformation of the wooden frame during an earthquake; therefore, the arrangement of the guide circular tube enables the supporting pile to exhibit a smooth and flexible motion under strong longitudinal wave earthquakes, further enhancing the overall seismic performance of the building.

[0022] The present invention offers several beneficial effects: the integration of the base, supporting pile, and seismic isolation frame allows for the comprehensive absorption and dispersion of seismic wave energy, thereby enhancing the building's damping and seismic performance. Additionally, the use of a wooden mortise-and-tenon structure, due to its simplicity, not only significantly reduces the overall structural weight but also lowers design and construction costs.BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The illustrations of accompanying drawings of the present invention are as follows:

[0024] FIG. 1 is a schematic diagram of a structure of the present invention;

[0025] FIG. 2 is a cross-sectional diagram of FIG. 1;

[0026] FIG. 3 is a partially exploded diagram of the present invention.

[0027] FIG. 4 is a schematic diagram of a connection structure of a supporting pile and a connecting frame;

[0028] FIG. 5 is an enlarged diagram of part A of FIG. 4;

[0029] FIG. 6 is an exploded diagram of a supporting pile and a connecting frame;

[0030] FIG. 7 is an exploded diagram of a wooden frame;

[0031] FIG. 8 is a top cross-sectional diagram of FIG. 1.

[0032] Reference numerals in figures: 1, a base; 2, a supporting pile; 3, a seismic isolation frame; 4, a damping washer; 11, an inner base; 12, a peripheral plate; 21, a connecting column; 22, a supporting disc; 23, a central square column; 24, an abutment boss; 25, a guide cylinder; 31, a wooden frame; 32, a guide circular tube; 311, a wood block; 312, a cushion block; 313, a press block.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present invention is further described below in conjunction with embodiments.

[0034] As shown in FIG. 1 and FIG. 2, a wooden connection structure for seismic resistance in pile foundations includes a base 1, a supporting pile 2 and four seismic isolation frames 3;

[0035] as shown in FIG. 2 and FIG. 3, the base 1 includes an inner base 11 and a peripheral plate 12, the peripheral plate 12 is sleeved on an outer peripheral surface of the inner base 11, a cross groove is arranged in a middle of a top surface of the inner base 11, an axial direction of the cross groove is vertically arranged, the cross groove includes a central groove and four rectangular grooves, the four rectangular grooves are uniformly distributed in a circumferential direction, each rectangular groove is in communication with the central groove, a square groove is arranged in a centre of a bottom surface of the central groove, and an axial direction of the square groove is vertically arranged;

[0036] as shown in FIG. 6, the supporting pile 2 includes a connecting column 21, a supporting disc 22 and a central square column 23 that are successively connected from top to bottom, wherein the connecting column 21 is arranged in a middle of an upper surface of the supporting disc 22, and the central square column 23 is arranged in a middle of a lower surface of the supporting disc 22; four abutment bosses 24 are further arranged on a lower surface of the supporting disc 22, the four abutment bosses 24 are uniformly distributed in a circumferential direction of the supporting disc 22, positions of the four abutment bosses 24 correspond one-to-one with the positions of the four rectangular grooves, and each abutment boss 24's size and shape are matched to those of its corresponding rectangular groove; a guide cylinder 25 is provided on a lower surface of each of the abutment bosses 24, and an axial direction of the guide cylinder 25 is vertically arranged;

[0037] as shown in FIG. 4 and FIG. 7, the seismic isolation frame 3 includes a wooden frame 31 and a guide circular tube 32; the wooden frame 31 is a mortise-and-tenon joint structure composed of multiple wood blocks, a middle of the wooden frame 31 is provided with a central channel passing through, and the central channel is vertically arranged, an outer diameter of the guide circular tube 32 is matched with an inner diameter of the central channel, and the guide circular tube 32 is sleeved in the central channel; an inner diameter of the guide circular tube 32 is matched with an outer diameter of the guide cylinder 25;

[0038] as shown in FIG. 2, FIG. 3, FIG. 6 and FIG. 8, the four seismic isolation frames 3 are respectively sleeved in four rectangular grooves, each side facade of single rectangular groove is in contact with the seismic isolation frame 3, a top surface of the seismic isolation frame 3 is lower than a top surface of the inner base 11, a bottom of the guide circular tube 32 is fixedly connected to a bottom of the rectangular groove; a lower part of the central square column 23 is sleeved in the square groove, four side facades of the central square column 23 are in contact with side facades of the four seismic isolation frames 3 respectively, an outer peripheral surface of the central square column 23 is spaced with a side wall of the central groove; the four abutment bosses 24 are respectively sleeved in four rectangular grooves, a lower side of the abutment bosses 24 is in contact with a top surface of the wooden frame 31, and lower parts of the four guide cylinders 25 are respectively sleeved in four guide circular tubes 32.

[0039] As shown in FIG. 7, in order to improve the seismic capacity, the wooden frame 31 is a multi-layer staggered laminated structure, each layer includes two wood blocks 311 that are parallel to each other in a longitudinal direction, the wood blocks 311 of adjacent two layers are perpendicular to each other in the longitudinal direction, and the wood blocks 311 of the adjacent two layers are interconnected using a mortise-and-tenon joint method.

[0040] As shown in FIG. 7, in order to further improve the effect of seismic force, two wood blocks 311 separated by only one layer and positioned relative to each other are defined as a support group; two cushion blocks 312 are arranged between the two wood blocks 311 controlled by one single support group, the two cushion blocks 312 are arranged at both ends of the wood block 311, and upper and lower surfaces of the cushion block 312 are in contact with upper and lower wood blocks 311 respectively.

[0041] As shown in FIG. 5 and FIG. 6, in order to improve the stability of the structure, two press blocks 313 are arranged at each end of the wood block 311 on the top layer, and two press blocks 313 at one end of the wood block 311 are arranged on two side facades of the wood block 311.

[0042] As shown in FIG. 2, in order to improve the supporting stability, a axis line of the connecting column 21, the supporting disc 22 and the central square column 23 is coaxially arranged.

[0043] As shown in FIG. 3, in order to further improve the buffer damping effect, a top surface of the peripheral plate 12 is higher than a top surface of the inner base 11, a damping washer 4 is arranged between the supporting disc 22 and the peripheral plate 12, an inner peripheral surface of the damping washer 4 is in contact with an outer peripheral surface of the supporting disc 22, an outer peripheral surface of the damping washer 4 is in contact with an inner peripheral surface of the peripheral plate 12, and the damping washer 4 is made of elastic material.

[0044] As shown in FIG. 1, in order to improve the strength and corrosion resistance of the base, an outer peripheral surface of the peripheral plate 12 is composed of multiple rectangular surfaces; the peripheral plate 12 is made of stainless steel plate.

Claims

1. A wooden connection structure for seismic resistance in pile foundations, comprising a base, a supporting pile and four seismic isolation frames; whereinthe base comprises an inner base and a peripheral plate, the peripheral plate is sleeved on an outer peripheral surface of the inner base, a cross groove is arranged in a middle of a top surface of the inner base, an axial direction of the cross groove is vertically arranged, the cross groove comprises a central groove and four rectangular grooves, the four rectangular grooves are uniformly distributed in a circumferential direction, each of the four rectangular grooves is in communication with the central groove, a square groove is arranged in a centre of a bottom surface of the central groove, and an axial direction of the square groove is vertically arranged;the supporting pile comprises a connecting column, a supporting disc and a central square column, wherein the connecting column, the supporting disc and the central square column are successively connected from top to bottom, the connecting column is arranged in a middle of an upper surface of the supporting disc, and the central square column is arranged in a middle of a lower surface of the supporting disc; four abutment bosses are arranged on the lower surface of the supporting disc, the four abutment bosses are uniformly distributed in a circumferential direction of the supporting disc, positions of the four abutment bosses respectively correspond one-to-one with positions of the four rectangular grooves, and a size and a shape of each of the four abutment bosses are matched to a size and a shape of each of the four rectangular grooves in correspondence; a guide cylinder is provided on a lower surface of each of the four abutment bosses, and an axial direction of the guide cylinder is vertically arranged;each of the four seismic isolation frames comprises a wooden frame and a guide circular tube; the wooden frame is a mortise-and-tenon joint structure composed of multiple wood blocks, a middle of the wooden frame is provided with a central channel passing through, and the central channel is vertically arranged; an outer diameter of the guide circular tube is matched with an inner diameter of the central channel, and the guide circular tube is sleeved in the central channel; an inner diameter of the guide circular tube is matched with an outer diameter of the guide cylinder;the four seismic isolation frames are respectively sleeved in the four rectangular grooves, each side facade of each of the four rectangular grooves is in contact with each of the four seismic isolation frames, a top surface of each of the four seismic isolation frames is lower than a top surface of the inner base, a bottom of the guide circular tube is fixedly connected to a bottom of each of the four rectangular grooves; a lower part of the central square column is sleeved in the square groove, four side facades of the central square column are in contact with side facades of the four seismic isolation frames respectively, an outer peripheral surface of the central square column is spaced with a side wall of the central groove; the four abutment bosses are respectively sleeved in the four rectangular grooves, a lower side of each of the four abutment bosses is in contact with a top surface of the wooden frame, and lower parts of four guide cylinders are respectively sleeved in four guide circular tubes.

2. The wooden connection structure according to claim 1, wherein the wooden frame is configured as a multi-layer staggered laminated structure, each layer comprises two wood blocks parallel to each other in a longitudinal direction, wood blocks of adjacent two layers are perpendicular to each other in the longitudinal direction, and the wood blocks of the adjacent two layers are interconnected using a mortise-and-tenon joint method.

3. The wooden connection structure according to claim 2, wherein two wood blocks separated by only one layer and positioned relative to each other are defined as a support group; two cushion blocks are arranged between the two wood blocks controlled by a single support group, the two cushion blocks are arranged at both ends of the wood block, and upper and lower surfaces of each of the two cushion blocks are in contact with upper and lower wood blocks respectively.

4. The wooden connection structure according to claim 2, wherein two press blocks are arranged at each end of the wood block on a top layer, and two press blocks at one end of the wood block are arranged on two side facades of the wood block.

5. The wooden connection structure according to claim 1, wherein an axis line of the connecting column, an axis line of the supporting disc and an axis line of the central square column are coaxially arranged.

6. The wooden connection structure according to claim 1, wherein a top surface of the peripheral plate is higher than a top surface of the inner base, a damping washer is arranged between the supporting disc and the peripheral plate, an inner peripheral surface of the damping washer is in contact with an outer peripheral surface of the supporting disc, an outer peripheral surface of the damping washer is in contact with an inner peripheral surface of the peripheral plate, and the damping washer is made of elastic material.

7. The wooden connection structure according to claim 1, wherein an outer peripheral surface of the peripheral plate is composed of multiple rectangular surfaces; the peripheral plate is made of stainless-steel plate.

8. The wooden connection structure according to claim 3, wherein two press blocks are arranged at each end of the wood block on a top layer, and two press blocks at one end of the wood block are arranged on two side facades of the wood block.

9. The wooden connection structure according to claim 2, wherein an axis line of the connecting column, an axis line of the supporting disc and an axis line of the central square column are coaxially arranged.

10. The wooden connection structure according to claim 3, wherein an axis line of the connecting column, an axis line of the supporting disc and an axis line of the central square column are coaxially arranged.

11. The wooden connection structure according to claim 2, wherein a top surface of the peripheral plate is higher than a top surface of the inner base, a damping washer is arranged between the supporting disc and the peripheral plate, an inner peripheral surface of the damping washer is in contact with an outer peripheral surface of the supporting disc, an outer peripheral surface of the damping washer is in contact with an inner peripheral surface of the peripheral plate, and the damping washer is made of elastic material.

12. The wooden connection structure according to claim 3, wherein a top surface of the peripheral plate is higher than a top surface of the inner base, a damping washer is arranged between the supporting disc and the peripheral plate, an inner peripheral surface of the damping washer is in contact with an outer peripheral surface of the supporting disc, an outer peripheral surface of the damping washer is in contact with an inner peripheral surface of the peripheral plate, and the damping washer is made of elastic material.

13. The wooden connection structure according to claim 2, wherein an outer peripheral surface of the peripheral plate is composed of multiple rectangular surfaces; the peripheral plate is made of stainless-steel plate.

14. The wooden connection structure according to claim 3, wherein an outer peripheral surface of the peripheral plate is composed of multiple rectangular surfaces; the peripheral plate is made of stainless-steel plate.

Images