A vertical connecting structure for repairing, newly building and regenerating a wood column

Abstract

The utility model discloses a kind of vertical connecting structure for repair, new building and regenerative wood column, belong to wood column connecting technical field;Including upper column, lower column, steel pin and hoop;The top of lower column and the bottom of upper column is separately provided with tenon and mortise, the upper column and lower column are connected and fixed by the clamping of mortise and tenon, the top surface of lower column is uniformly provided with at least four axial holes, and the axial center line of the axial hole is on the same circumference, the lower part of steel pin is fixedly embedded in corresponding axial hole;The lower bottom surface of upper column is provided with bolt hole corresponding axial hole, the upper part of steel pin is fixedly embedded in bolt hole;The hoop is coaxially sleeved in the splicing of lower column and upper column, and is fastened and connected on the outside of the splicing of lower column and upper column by bolt.The utility model realizes old wood column regenerative utilization, energy saving and carbon reduction, construction is convenient, adapts to multi-section wood column, strong aseismaticity and durability, and is suitable for wood building repair and new building.

Description

Technical Field

[0001] This utility model relates to the field of wooden pillar repair technology, and in particular to a vertical connection structure for repairing, constructing and regenerating wooden pillars. Background Technology

[0002] Traditional timber structure is the core structural form of ancient Chinese architecture. Among them, multi-story pavilion-style timber buildings are characterized by "vertical stacking". The whole building is formed by vertically stacking several single-layer timber structures. Therefore, the vertical connection technology of the upper and lower timber columns directly determines the structural stability and safety of this type of building, which is a key technology direction in the field of timber structure architecture.

[0003] In the course of historical technological development, multi-story wooden buildings have developed three typical methods of vertical connection of wooden columns, but all of them have significant limitations: the first is the "forked column construction," which requires the upper column base to be inserted into the lower bracket to achieve connection; the second is the "entwined column construction," which relies on the lower column base beam to support the upper column; both require complex bracket and beam conversion structures, with cumbersome construction techniques and extremely high requirements for component compatibility, making it difficult to adapt to the convenient construction needs of modern buildings; the third is the "through column construction," which is the mainstream in the Qing Dynasty, using a whole tall log as a vertical load-bearing component. Although this avoids the problem of inter-layer conversion, it has strict requirements for timber specifications and relies on scarce tall log resources; with the advancement of national forest resource protection policies, the ban on logging of natural forests has made tall logs that meet the requirements increasingly scarce, and the application scenarios of "through column construction" have been greatly limited.

[0004] With the strengthening of national efforts to protect forest resources, the policy of prohibiting logging in natural forests has made tall timber that meets construction needs increasingly scarce. On the other hand, a considerable number of usable wooden pillars are generated during the demolition of many ancient buildings or old brick-and-wood mixed buildings (most of which cannot be directly reused due to their limited length). Currently, these demolished wooden pillars are mostly processed into shavings or fibers by crushers, and then made into particleboard or fiberboard. This not only has extremely low resource utilization but also wastes timber resources. In fact, demolished wooden pillars that have been confirmed to meet performance standards through non-destructive testing have the potential to be recycled in new buildings, but due to the lack of suitable vertical connection technology, efficient reuse is difficult to achieve.

[0005] For modern multi-story timber buildings, reliable vertical splicing technology for timber columns is urgently needed to replace scarce tall logs in order to meet structural height requirements. However, existing technical solutions have obvious limitations: either they continue the complex conversion structure of traditional "forked column construction" and "wrapped column construction," which has high construction costs and poor adaptability; or they adopt simple splicing methods, which cannot effectively withstand the combined forces such as tension, compression, shear, bending moment and torque faced by timber columns during service, making the splice points weak links in the structure, prone to cracking, deformation and even overall instability, seriously affecting the safety of the building. At the same time, existing solutions do not fully consider the need for timber column recycling, which is not conducive to reducing the consumption of virgin timber and also contradicts the national development goals of energy conservation and carbon reduction. Therefore, developing a vertical connection technology for timber columns that takes into account structural safety, resource recyclability and construction convenience has become an urgent need in the current timber structure building field. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a vertical connection structure for repairing, building and regenerating wooden columns, which solves the problems of traditional multi-story wooden building column connections requiring complex beam and rafter conversion, relying on scarce tall logs, and having low utilization rate of old wooden columns and easy weak links at splicing points.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A vertical connection structure for repairing, constructing, and regenerating wooden pillars is provided, comprising: an upper pillar, a lower pillar, a steel pin, and a clamp; the top of the lower pillar and the bottom of the upper pillar are respectively provided with a tenon and a mortise, the upper pillar and the lower pillar are connected and fixed by the interlocking fit of the mortise and tenon, at least four axial holes are evenly distributed on the top surface of the lower pillar, and the axis of the axial holes is located on the same circumference, the lower part of the steel pin is fixedly embedded in the corresponding axial hole; the lower bottom surface of the upper pillar is provided with a pin hole corresponding to the axial hole, the upper part of the steel pin is fixedly embedded in the pin hole; the clamp is coaxially sleeved at the joint of the lower pillar and the upper pillar, and is fastened to the outside of the joint of the lower pillar and the upper pillar by bolts.

[0009] It should be noted that the tenon at the top of the lower column and the mortise at the bottom of the upper column, which precisely match the tenon, constitute the basic mortise and tenon connection. This not only achieves the initial positioning and fitting of the upper and lower columns, but also effectively transmits the torque and lateral shear force at the column end through the tight contact between the tenon and the side of the mortise. To further enhance the bending and tensile resistance of the joint, at least four vertical steel pins are evenly distributed around the circumference of the top surface of the lower column. The lower ends of these steel pins are fixed in the axial holes of the lower column, and the upper ends are inserted into the corresponding pin holes on the bottom surface of the upper column, thus rigidly connecting the upper and lower columns into one, jointly resisting bending moment and tensile force. Furthermore, a metal clamp is installed on the outside of the mortise and tenon and steel pin connection. The clamp is coaxially fitted on the outside of the splice and secured with bolts, forming a strong circumferential constraint on the wooden column. This not only further enhances the joint's ability to resist various complex loads, but also integrates the entire connection area into a solid whole, ensuring the smooth transmission of loads and the safety and reliability of the joint.

[0010] Preferably, the outer surface of the tenon fits tightly against the inner surface of the mortise to transmit the column end torque and lateral shear force.

[0011] It should be noted that the tight fit between the outer surface of the tenon and the inner surface of the mortise effectively transmits torque between the upper and lower columns, preventing relative rotation between them under stress and greatly enhancing the torsional stiffness of the joint. At the same time, this contact surface can also directly bear and transmit lateral shear force, thus forming a multi-dimensional force system together with the vertical steel pin and external clamp, significantly improving the integrity and reliability of the connection joint under real load conditions.

[0012] Preferably, the inner walls of the axial hole and the pin hole are both provided with rough surfaces, and both the axial hole and the pin hole are filled with anchoring adhesive; the outer wall of the steel pin is tightly bonded to the rough surfaces by anchoring adhesive, and the two ends of the steel pin abut against the bottom of the axial hole and the bottom of the pin hole, respectively.

[0013] It should be noted that by creating rough surfaces on the inner walls of the axial hole and the pin hole, the contact area and mechanical interlocking force between the hole wall and the filler are significantly increased. Reinforcing adhesive is injected into the hole to fully fill the gap between the steel pin and the rough hole wall. After curing, the excellent bonding properties firmly bond the steel pin to the wooden post, effectively resisting the pull-out force and shear force of the pin. Furthermore, the two ends of the steel pin abut against the bottom of the axial hole and the pin hole respectively, achieving direct mechanical bearing. This allows the load to be transmitted through both adhesive force and mechanical bearing, ensuring the rigidity and reliability of the steel pin connection and enabling it to effectively transmit bending moment, tension, and shear force.

[0014] Preferably, the clamp includes two symmetrically arranged semi-circular ring bodies, each with an integrally formed flange connection at both ends; the two ring bodies are engaged with each other at the joint of the lower column and the upper column, and their flange connections are fitted together, the flange connections are fastened by bolts and nuts, so that the clamp is tightly fitted with the outer surface of the upper column and the lower column.

[0015] It should be noted that the clamp consists of two symmetrically arranged semi-circular rings, each with an integrally formed flange connection at both ends. During installation, the two rings are fastened to the joint of the upper and lower columns from the left and right or top and bottom directions, so that their respective flange connections fit together, and then they are tightened with bolts and nuts. The split flange connection design not only allows the clamp to be assembled on site without moving the column, greatly improving the convenience of construction, but more importantly, the strong pre-tightening force generated by tightening the bolts can tightly bind the entire clamp to the outside of the wooden column, forming a uniform and reliable circumferential constraint force, thereby effectively enhancing the overall integrity of the joint and resisting the radial deformation and longitudinal slippage of the column.

[0016] Preferably, the upper and lower ends of the hoop are provided with through holes corresponding to the positions of the upper and lower columns, and the upper and lower columns are provided with threaded holes corresponding to the positions of the through holes. The axis of the threaded holes does not intersect with the axis of the steel pin. Both ends of the hoop are fixed to the upper and lower columns by the cooperation of bolts, through holes and threaded holes.

[0017] It should be noted that by passing bolts through the through holes of the hoop and screwing them into the threaded holes of the wooden column, the upper and lower ends of the hoop are independently and firmly anchored to the upper and lower columns respectively. In addition to the circumferential constraint provided by the flange bolts, the longitudinal mechanical locking is added, which can effectively prevent the relative slippage between the hoop and the wooden column that may occur under long-term load or vibration, and further enhance the stability and durability of the node connection.

[0018] Preferably, two beam-bearing connecting plates are provided at intervals along the circumferential direction on the outer side wall of the clamp, and the beam-bearing connecting plates are perpendicular to the axial direction of the clamp and are integrally formed with the clamp.

[0019] It should be noted that the beam load-bearing connecting plates are spaced along the circumference to accommodate the symmetrical or asymmetrical arrangement of wooden beams on both sides of the column; the connecting plates and the clamps are integrally molded, rather than welded or bolted later, which avoids structural weak points caused by secondary connections, ensures that the connecting plates and the clamps have consistent structural strength and stiffness, and effectively transfers loads without local breakage or deformation.

[0020] Preferably, the horizontal cross-section of the tenon is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base; the horizontal cross-section shape of the mortise is adapted to the horizontal cross-section shape of the tenon, and the tenon is fitted into the mortise to form a gapless interlock; the two waist surfaces of the trapezoid form guide slopes for positioning during splicing and can decompose the transverse shear force into axial pressure.

[0021] It should be noted that the horizontal cross-section of the tenon is trapezoidal, and its two waist surfaces naturally form guide slopes, which can play a role in automatic guidance and precise positioning during the splicing of upper and lower columns, greatly facilitating on-site installation. Furthermore, when the inclined interlocking structure is subjected to lateral shear force, it can use the mechanical effect of the inclined surface to decompose part of the lateral force into axial pressure on the wooden column, thereby enhancing the joint's ability to resist horizontal loads. It also uses the wedge effect to generate a certain self-locking force, effectively preventing the tenon from coming out of the mortise and improving the tightness and reliability of the connection.

[0022] Preferably, the mortise is a rectangular groove that runs radially through the wooden post, and the tenon is a rectangular tenon that fits the rectangular groove. The horizontal cross-sectional dimensions of the rectangular tenon are the same as the horizontal cross-sectional dimensions of the rectangular groove, and the height of the rectangular tenon is equal to the depth of the rectangular groove.

[0023] It should be noted that the precise dimensional fit between the rectangular groove and the rectangular tenon ensures that the tenon can achieve a large-area planar contact after being embedded in the mortise, thus providing a stable and reliable bearing surface for transmitting pressure and shear force. Furthermore, the rectangular structure is easier to process and manufacture than other irregular mortise and tenon joints, which is conducive to improving production efficiency and ensuring processing accuracy. It is particularly suitable for application scenarios that have primary requirements for the compressive and shear resistance of the joint and pursue economy and construction convenience.

[0024] Preferably, the mortise is a fan-shaped groove evenly distributed around the axis of the wooden column, and the number of the fan-shaped grooves is 2-4. The tenon is a fan-shaped tenon that matches the fan-shaped grooves, and the central angle and arc length of the fan-shaped tenon are completely matched with the central angle and arc length of the fan-shaped grooves.

[0025] It should be noted that the fan-shaped grooves are evenly arranged around the axis of the wooden column, which ensures that the interlocking force is evenly transmitted along the circumference of the wooden column after the upper and lower columns are spliced. This avoids local stress concentration caused by groove misalignment, and thus prevents the wooden column from cracking or deforming due to uneven stress. Furthermore, the arc surface of the tenon and the arc surface of the groove, as well as the radial end face of the tenon and the radial end face of the groove, form a double contact surface. Compared with the mortise and tenon structure with a single plane contact, it can form a stronger constraint in the circumferential direction, significantly improving the torsional resistance of the joint and effectively preventing relative rotation when the upper and lower columns are under stress. This structure, together with the vertical pull-out resistance and bending moment transmission function of the steel pin and the circumferential constraint function of the clamp, further enhances the load-bearing stability of the spliced ​​joint under combined forces.

[0026] Preferably, there are two fan-shaped grooves, which are symmetrically arranged around the axis of the wooden column and divide the circular end face where the groove is located into equal parts.

[0027] It should be noted that the number of fan-shaped grooves is clearly two and they are symmetrically arranged around the axis of the wooden column. This can form a two-way constraint in the circumferential direction through two independent fan-shaped interlocking surfaces, effectively transmitting the torque and lateral shear force at the column end, avoiding the loosening of the node due to insufficient load-bearing capacity of a single interlocking surface. It can also reduce the number of slots to preserve the integrity of the wooden column section to the greatest extent and prevent excessive slotting from reducing the load-bearing capacity of the wooden column itself.

[0028] The beneficial effects of this utility model are:

[0029] This utility model provides a vertical connection structure for repairing, constructing, and recycling wooden columns. It achieves tight interlocking of upper and lower columns through mortise and tenon joints, efficiently transmitting pressure, shear force, and torque. Evenly distributed steel pins are bonded with anchoring adhesive and mechanically connected, reliably bearing bending moment and tension. Split-type clamps provide strong circumferential restraint and longitudinal anchoring, forming a seismic-resistant system of "strong nodes and weak components." This not only allows the load-bearing capacity at the joint to exceed that of the wooden column itself, effectively solving the problems of traditional connections relying on tall logs, complex structures, and weak nodes, but also greatly promotes the recycling of waste wooden columns, significantly reducing resource consumption and carbon emissions. It combines structural safety, ease of construction, and green sustainability. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a vertical connection structure for repairing, constructing, and regenerating wooden pillars, according to Embodiment 1 of this utility model.

[0031] Figure 2 This is an exploded structural diagram of a vertical connection structure for repairing, constructing, and regenerating wooden pillars, according to Embodiment 1 of this utility model.

[0032] Figure 3 This is a schematic diagram of the lower column structure of Embodiment 1 of this utility model.

[0033] Figure 4 This is a schematic diagram of the upper column structure of Embodiment 1 of this utility model.

[0034] Figure 5 This is a schematic diagram of the clamp structure of Embodiment 1 of this utility model.

[0035] Figure 6 This is a schematic diagram of the overall structure of a vertical connection structure for repairing, constructing, and regenerating wooden pillars, according to Embodiment 2 of this utility model.

[0036] Figure 7 This is a schematic diagram of the lower column structure in Embodiment 2 of this utility model.

[0037] Figure 8 This is a schematic diagram of the upper column structure in Embodiment 2 of this utility model.

[0038] In the diagram: 1. Upper column; 2. Lower column; 3. Steel pin; 4. Clamp; 5. Tenon; 6. Mortise; 7. Axial hole; 8. Pin hole; 9. Through hole; 10. Beam load-bearing connection plate.

[0039] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Example 1

[0042] like Figures 1-5 As shown, a vertical connection structure for repairing, constructing, and regenerating wooden pillars includes: an upper pillar 1, a lower pillar 2, a steel pin 3, and a clamp 4; the top of the lower pillar 2 and the bottom of the upper pillar 1 are respectively provided with a tenon 5 and a mortise 6, the upper pillar 1 and the lower pillar 2 are connected and fixed by the snap-fit ​​of the mortise 6 and the tenon 5, at least four axial holes 7 are evenly distributed on the top surface of the lower pillar 2, and the axis of the axial holes 7 is located on the same circumference, the lower part of the steel pin 3 is fixedly embedded in the corresponding axial hole 7; the lower bottom surface of the upper pillar 1 is provided with a pin hole 8 corresponding to the axial hole 7, the upper part of the steel pin 3 is fixedly embedded in the pin hole 8; the clamp 4 is coaxially sleeved at the joint of the lower pillar 2 and the upper pillar 1, and is fastened to the outside of the joint of the lower pillar 2 and the upper pillar 1 by bolts.

[0043] The outer surface of the tenon 5 fits tightly against the inner surface of the mortise 6 to transmit the column end torque and lateral shear force.

[0044] The inner walls of the axial hole 7 and the pin hole 8 are both provided with rough surfaces, and both the axial hole 7 and the pin hole 8 are filled with anchoring adhesive; the outer wall of the steel pin 3 is tightly bonded to the rough surfaces by anchoring adhesive, and the two ends of the steel pin 3 abut against the bottom of the axial hole 7 and the bottom of the pin hole 8, respectively.

[0045] The clamp 4 includes two symmetrically arranged semi-circular ring bodies, and both ends of the clamp body are integrally formed with flange connection parts; the two clamp bodies are engaged with each other at the splice of the lower column 2 and the upper column 1, and their flange connection parts are closely fitted to each other. The flange connection parts are fastened by bolts and nuts, so that the clamp 4 is tightly fitted to the outer surface of the upper column 1 and the lower column 2.

[0046] The upper and lower ends of the hoop are provided with through holes 9 corresponding to the positions of the upper column 1 and the lower column 2. The upper column 1 and the lower column 2 are provided with threaded holes corresponding to the positions of the through holes 9. The axis of the threaded holes does not intersect with the axis of the steel pin 3. Both ends of the hoop are fixed to the upper column 1 and the lower column 2 by the cooperation of bolts, through holes 9 and threaded holes.

[0047] Two beam-bearing connecting plates 10 are spaced apart along the circumferential direction on the outer side wall of the clamp 4. The beam-bearing connecting plates 10 are perpendicular to the axial direction of the clamp 4 and are integrally formed with the clamp 4.

[0048] The horizontal cross-section of the tenon 5 is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base; the horizontal cross-section shape of the mortise 6 is adapted to the horizontal cross-section shape of the tenon 5, and the tenon 5 is fitted into the mortise 6 to form a gapless interlocking; the two waist surfaces of the trapezoid form guide slopes for positioning during splicing and can decompose the transverse shear force into axial pressure.

[0049] The working principle and usage method of a vertical connection structure for repairing, constructing, and regenerating wooden pillars in this embodiment:

[0050] This embodiment provides a vertical connection structure for repairing, constructing, and regenerating wooden columns. The outer surface of the tenon 5 and the inner surface of the mortise 6 are tightly fitted together, forming a ring-shaped contact interface. When the wooden column is torsioned, the static friction between the contact surfaces and the interlocking force of the wood work together to resist relative rotation, preventing torsional misalignment of the upper and lower columns 2 and significantly improving the torsional stiffness of the joint. Under lateral shear force, the fitted sides directly bear the shear force and transmit it to the entire column, rather than concentrating it in a localized area. At the same time, the waist surface (guide slope) of the trapezoidal section utilizes the mechanical decomposition effect to convert part of the lateral shear force into axial pressure along the slope. This pressure further enhances the tightness of the tenon and mortise engagement, forming a "self-locking effect" that effectively prevents the tenon 5 from coming out of the mortise 6. The trapezoidal structure with a narrow upper base and a wide lower base allows the mortise 6 of the upper column 1 to automatically align along the waist surface of the tenon 5, eliminating the need for repeated adjustments during splicing and greatly improving on-site positioning accuracy and efficiency. The anchoring adhesive fills the holes. The gap between the wall and the steel pin 3, after curing, forms a high-strength adhesive layer. When the column is bent, the bending moment is converted into the tension and pressure of the steel pin 3, and the anchoring adhesive transfers the force of the steel pin 3 to the wooden column. When subjected to vertical tension, the anchoring adhesive directly resists the pull-out force of the steel pin 3, preventing the upper and lower columns 2 from separating. After the two semi-circular hoops are fastened, the bolts of the flange connection generate a pre-tightening force, making the clamp 4 fit tightly against the outer surface of the wooden column, forming a uniform circumferential pressure. This pressure can constrain the radial deformation at the splice of the wooden column (such as the bulging when the wooden column is bent), and at the same time enhance the synergistic force-bearing effect of the tenon and the steel pin 3, preventing the local structure from deviating from the force-bearing system due to deformation. The beam bearing connection plate 10 is a transitional structure to realize "beam-column synergistic force-bearing". The two connection plates are spaced apart along the circumference of the hoop, which can be adapted to the symmetrical or asymmetrical arrangement of wooden beams on both sides of the column (such as right-angle beams and parallel beams), without the need for additional welding or drilling, thus improving the structural adaptability.

[0051] When using this product, select wooden pillars that have passed non-destructive testing (either recycled or new wood pillars). Cut the upper pillar 1 and lower pillar 2 according to the designed length, ensuring a clean cut. Machin a trapezoidal tenon 5 at the top of the lower pillar 2 (controlling the width of the upper and lower bases and the angle of the waist surface according to the design dimensions). Machin a trapezoidal mortise 6 at the bottom of the upper pillar 1 to fit the tenon 5. After machining, check the fit between the outer surface of the tenon 5 and the inner surface of the mortise 6 to ensure the gap is within the error range. Drill at least four axial holes 7 evenly distributed in the area of ​​the tenon 5 in the lower pillar 2. The axis of the axial holes 7 should be located on the same circumference, with a diameter of [missing information]. Drill pin holes 8 at corresponding positions at the bottom of the upper column 1, with the depth of the pin hole 8 and the depth of the axial hole 7 not less than the length of the steel pin 3, and the depth of the axial hole 7 not less than 1 / 2 the length of the steel pin 3, and the depth of the pin hole 8 not less than 1 / 3 the length of the steel pin 3. Use sandblasting or a milling cutter to roughen the inner walls of the axial hole 7 and pin holes 8, and clean the wood chips and impurities from the holes. Inject anchoring adhesive into the axial hole 7 of the lower column 2, and insert the steel pin 3 (selected according to the design diameter) into the axial hole 7, ensuring that the lower end of the steel pin 3 is flush with the shaft. The bottom of the hole should be aligned, and any overflowing anchoring adhesive should be cleaned up promptly. The anchoring adhesive should be allowed to set until it initially hardens, during which time the steel pin 3 should be protected from external disturbance. After initial hardening, anchoring adhesive should be injected into the pin hole 8 of the upper column 1. Then, the upper column 1 should be lifted so that the mortise 6 of the upper column 1 aligns with the trapezoidal tenon 5 of the lower column 2. The column 1 should be slowly lowered along the waist surface of the tenon 5, using the guiding effect of the trapezoidal structure to ensure the tenon 5 is fully engaged in the mortise 6. During the lowering process, ensure that the pin hole 8 of the upper column 1 is precisely fitted into the upper part of the steel pin 3 until the upper end of the steel pin 3 abuts against the bottom of the pin hole 8. At this point, the splicing surfaces of the upper and lower columns 2 should be completely fitted. The two semi-circular rings should then be... Fasten the clamps from both sides of the wooden column, ensuring the clamps cover the joint between the upper column 1 and the lower column 2, while ensuring the flange connection is fully fitted, with the beam load-bearing connecting plate 10 facing the installation direction of the wooden beam; insert bolts into the flange connection and tighten the nuts in a diagonal sequence (to avoid unilateral force causing clamp displacement) until the clamp 4 is tightly fitted to the outer surface of the wooden column; allow it to stand for 24 hours (to ensure the anchoring adhesive is fully cured), and check for gaps at the joint, loose steel pins 3, and tight bolts on the clamp 4; confirm the integrity of the joint through non-destructive testing (such as tapping method), and complete the construction after acceptance.

[0052] Example 2

[0053] like Figures 6-8As shown in the figure, a vertical connection structure for repairing, constructing, and regenerating wooden pillars according to this embodiment includes: an upper pillar 1, a lower pillar 2, a steel pin 3, and a clamp 4; the top of the lower pillar 2 and the bottom of the upper pillar 1 are respectively provided with a tenon 5 and a mortise 6, the upper pillar 1 and the lower pillar 2 are connected and fixed by the snap-fit ​​of the mortise 6 and the tenon 5, at least four axial holes 7 are evenly distributed on the top surface of the lower pillar 2, and the axis of the axial holes 7 is located on the same circumference, the lower part of the steel pin 3 is fixedly embedded in the corresponding axial hole 7; the lower bottom surface of the upper pillar 1 is provided with a pin hole 8 corresponding to the axial hole 7, the upper part of the steel pin 3 is fixedly embedded in the pin hole 8; the clamp 4 is coaxially sleeved at the joint of the lower pillar 2 and the upper pillar 1, and is fastened to the outside of the joint of the lower pillar 2 and the upper pillar 1 by bolts.

[0054] The outer surface of the tenon 5 fits tightly against the inner surface of the mortise 6 to transmit the column end torque and lateral shear force.

[0055] The inner walls of the axial hole 7 and the pin hole 8 are both provided with rough surfaces, and both the axial hole 7 and the pin hole 8 are filled with anchoring adhesive; the outer wall of the steel pin 3 is tightly bonded to the rough surfaces by anchoring adhesive, and the two ends of the steel pin 3 abut against the bottom of the axial hole 7 and the bottom of the pin hole 8, respectively.

[0056] Two beam-bearing connecting plates 10 are provided at intervals along the circumferential direction on the outer side wall of the clamp 4. The beam-bearing connecting plates 10 are perpendicular to the axis of the clamp body and are integrally formed with the clamp 4.

[0057] The mortise 6 is a fan-shaped groove evenly distributed around the axis of the wooden column. There are two fan-shaped grooves, which are symmetrically arranged around the axis of the wooden column and divide the circular end face where the mortise 6 is located. The tenon 5 is a fan-shaped tenon 5 adapted to the fan-shaped groove. The central angle and arc length of the fan-shaped tenon 5 are completely matched with the central angle and arc length of the fan-shaped groove.

[0058] Compared with Example 1:

[0059] This embodiment provides a vertical connection structure for repairing, constructing, and regenerating wooden columns. Two fan-shaped tenons 5 are symmetrically distributed around the column's axis and form a perfectly fitted "arc-arc" contact surface with the fan-shaped groove. When the circular wooden column is subjected to torsion, the torque is transmitted synchronously through the two symmetrical interlocking surfaces, forming a "bidirectional torsional fulcrum." Compared to the unidirectional planar constraint of the trapezoidal tenon and mortise in Embodiment 1, the symmetrical fan-shaped structure avoids torque concentration on a single contact surface, allowing torsional stress to be evenly distributed along the circumference, increasing torsional stiffness, and effectively preventing torsional slippage of the circular wooden column due to localized overload. Furthermore, the arc-shaped groove... The mating surface can distribute shear force along the arc path to the entire circumference of the wooden column, rather than concentrating it on a local plane. At the same time, the contact area of ​​the arc-shaped contact surface is increased compared to the first embodiment, and the shear stress per unit area is significantly reduced, reducing the splitting of wood due to excessive local shear stress. The clamp 4 is coaxially fitted at the joint of the circular wooden column and fixed by anchoring adhesive. The anchoring adhesive can not only fill the tiny gaps, but also form a high-strength adhesive layer between the steel clamp 4 and the wooden column after curing. In addition, the sealing properties of the anchoring adhesive can isolate air and moisture, prevent the joint of the wooden column from decaying due to moisture, and extend the durability of the joint.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is used only to illustrate the technical solution of this utility model, and is not intended to limit the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

[0061] In the description of this utility model, it should be understood that the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A vertical connection structure for repairing, new construction, and regeneration of a timber column, characterized by, include: The structure comprises an upper column (1), a lower column (2), a steel pin (3), and a clamp (4). The top of the lower column (2) and the bottom of the upper column (1) are respectively provided with a tenon (5) and a mortise (6). The upper column (1) and the lower column (2) are connected and fixed by the snap-fit ​​of the mortise (6) and the tenon (5). At least four axial holes (7) are evenly distributed on the top surface of the lower column (2), and the axis of the axial holes (7) is located on the same circumference. The lower part of the steel pin (3) is fixedly embedded in the corresponding axial hole (7). The bottom surface of the upper column (1) is provided with a pin hole (8) corresponding to the axial hole (7). The upper part of the steel pin (3) is fixedly embedded in the pin hole (8). The clamp (4) is coaxially sleeved at the joint of the lower column (2) and the upper column (1), and is fastened to the outside of the joint of the lower column (2) and the upper column (1) by bolts.

2. A vertical connection structure for repairing, new construction and regeneration of a timber column according to claim 1, characterized in that: The outer side of the tenon (5) fits tightly against the inner side of the mortise (6) to transmit the column end torque and lateral shear force.

3. A vertical connection structure for repairing, new construction and regeneration of a timber column according to claim 1, characterized in that: The inner wall of the axial hole (7) and the inner wall of the pin hole (8) are both provided with rough surfaces, and the axial hole (7) and the pin hole (8) are both filled with anchoring adhesive; the outer wall of the steel pin (3) is tightly bonded to the rough surface by anchoring adhesive, and the two ends of the steel pin (3) abut against the bottom of the axial hole (7) and the bottom of the pin hole (8) respectively.

4. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 1, characterized in that: The clamp (4) includes two symmetrically arranged semi-circular ring bodies, both ends of which are integrally formed with flange connection parts; the two clamp bodies are engaged with each other at the splice of the lower column (2) and the upper column (1), and their flange connection parts are closely fitted to each other. The flange connection parts are fastened by bolts and nuts, so that the clamp (4) is closely fitted with the outer surfaces of the upper column (1) and the lower column (2).

5. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 4, characterized in that: The upper and lower ends of the hoop are provided with through holes (9) corresponding to the positions of the upper column (1) and the lower column (2). The upper column (1) and the lower column (2) are provided with threaded holes corresponding to the positions of the through holes (9). The axis of the threaded holes does not intersect with the axis of the steel pin (3). Both ends of the hoop are fixed to the upper column (1) and the lower column (2) respectively by the cooperation of bolts, through holes (9) and threaded holes.

6. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 1 or 4, characterized in that: Two beam-bearing connecting plates (10) are spaced apart along the circumferential direction on the outer side wall of the clamp (4). The beam-bearing connecting plates (10) are perpendicular to the axial direction of the clamp (4) and are integrally formed with the clamp (4).

7. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 1, characterized in that: The horizontal cross section of the tenon (5) is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base; the horizontal cross section shape of the mortise (6) is adapted to the horizontal cross section shape of the tenon (5), and the tenon (5) is fitted into the mortise (6) to form a gapless interlock; the two waist surfaces of the trapezoid form guide slopes, which are used for positioning during splicing and can decompose the transverse shear force into axial pressure.

8. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 1, characterized in that: The mortise (6) is a rectangular groove that runs radially through the wooden column. The tenon (5) is a rectangular tenon (5) that fits the rectangular groove. The horizontal cross-sectional dimensions of the rectangular tenon (5) are the same as the horizontal cross-sectional dimensions of the rectangular groove, and the height of the rectangular tenon (5) is equal to the depth of the rectangular groove.

9. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 1, characterized in that: The mortise (6) is a fan-shaped groove evenly distributed around the axis of the wooden column. There are 2-4 fan-shaped grooves. The tenon (5) is a fan-shaped tenon (5) that is adapted to the fan-shaped groove. The central angle and arc length of the fan-shaped tenon (5) are completely matched with the central angle and arc length of the fan-shaped groove.

10. A vertical connection structure for repairing, constructing, and regenerating wooden pillars as described in claim 9, characterized in that: The number of fan-shaped grooves is two, and they are symmetrically arranged around the axis of the wooden column, and the circular end face where the mortise (6) is located is evenly divided.

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