Dry-type connecting assembled concrete beam-column joint
Patent Information
- Application Number
- CN202522308632.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-10-31
AI Technical Summary
虽然该种方法的现场施工工作量小、质量可控、方便改造及环境影响小，但是目前还没有公认的具有高施工效率且良好抗震性能的干式连接方法
1.预制混凝土柱和预制混凝土梁实现了全预制且预制构件水平向无外伸钢筋；
Smart Images
Figure CN224813266U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of prefabricated building technology, and in particular to a dry-connection prefabricated concrete beam-column joint. Background Technology
[0002] The construction of traditional cast-in-place concrete buildings requires setting up formwork, tying reinforcing bars, and pouring concrete on-site, resulting in high labor intensity, significant environmental impact, and long construction periods. To address this issue, prefabricated buildings have emerged.
[0003] Prefabricated buildings offer significant advantages such as environmental friendliness, high industrialization, and strong adaptability. Prefabricated concrete structures mainly include prefabricated concrete shear wall structures and prefabricated concrete frame structures. Prefabricated concrete frame structures are widely used in public buildings due to their flexible spatial layout, simple component fabrication, and ease of standardized production. Beam-column joints are crucial force-transfer points in prefabricated concrete frame structures, and their connection performance directly affects the overall seismic performance of the structure.
[0004] Currently, prefabricated beam-column joint connections are mainly wet connections, but wet connections generally require post-pouring of concrete in the connection area and tying of reinforcing bars on the construction site. Therefore, some have proposed dry connection methods. Although this method involves less on-site construction work, offers controllable quality, facilitates modification, and has minimal environmental impact, there is currently no universally accepted dry connection method that offers both high construction efficiency and good seismic performance. Utility Model Content
[0005] In order to overcome the technical problems described in the prior art, this application provides a dry-connected precast concrete beam-column joint.
[0006] This application provides a dry-connection precast concrete beam-column joint using the following technical solution: A dry-connection precast concrete beam-column joint includes a precast concrete column, a precast concrete beam, and a steel connection joint located between the precast concrete column and the precast concrete beam. The steel connection joint includes two H-beams spliced at both ends, connecting plates inserted into the webs of the two H-beams at their respective close ends, and upper, middle, and lower side friction plates located between the two H-beams. The opposite ends of the two H-beams are connected to the precast concrete column and the precast concrete beam, respectively. The connecting plates on the two H-beams are stacked. The middle friction plate is attached to one side of one of the connecting plates. The upper and lower side friction plates are located on both sides of the middle friction plate and are attached to the web. Multiple bolt holes are drilled through the upper, middle, and lower side friction plates and the connecting plate away from the middle friction plate. Waist holes are drilled through the webs of the two H-beams and the other connecting plate at the positions corresponding to the bolt holes. Locking bolts for fastening are provided between the bolt holes and the waist holes.
[0007] Furthermore, the web of the H-beam is L-shaped, so that one end of the H-beam is a flat end and the other end is a raised end. One H-beam is inverted and spliced onto another upright H-beam. Two connecting plates are stacked between the two raised ends. One end of the connecting plate is provided with an insertion groove that is adapted to the insertion of the web of the flat end of the H-beam. When the connecting plate is tightly inserted into the web of the flat end of the H-beam, the end of the connecting plate away from the insertion groove is flush with the end of the raised end.
[0008] Furthermore, multiple waist holes on the connecting plate are evenly distributed on both sides of the insertion slot, and two friction plates are provided in the middle, located on both sides of the web plate respectively.
[0009] Furthermore, a cover plate is fitted to each of the opposite flanges of the H-beam, with both ends of the cover plate extending to the two H-beams respectively. Connecting bolts for locking the cover plate to the flange are provided on the H-beams.
[0010] Furthermore, the cover plate is made of shape memory alloy.
[0011] Furthermore, the width of the cover plate is the same as the width of the flange.
[0012] Furthermore, a cantilever beam is provided on the precast concrete column, the precast concrete beam and the cantilever beam are aligned, and the flat ends of the two H-beams are embedded for the same length in the precast concrete beam and the cantilever beam, respectively.
[0013] Furthermore, the length of the protruding end of the H-beam is 200-300 mm, and the length of the insertion groove on the connecting plate is 200 mm.
[0014] Furthermore, the length of the waist hole on the web plate is 2.5-4 times the diameter of the locking bolt thread.
[0015] Furthermore, the length of the waist hole on the connecting plate is 2-3 times the diameter of the locking bolt thread.
[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. The precast concrete columns and beams are fully precast and the precast components have no horizontally protruding reinforcing bars; 2. All precast beams and columns are connected by bolts, eliminating the need for on-site reinforcement binding, formwork erection, and post-concrete pouring, thus achieving a completely dry connection and significantly improving construction efficiency at the assembly site. 3. The use of upper side friction plates, middle friction plates, lower side friction plates, and shape memory alloy plates significantly enhances the energy dissipation capacity and recoverability of beam-column joints under seismic loading. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a front view of the overall structure in the embodiments of this application.
[0019] Figure 2 This is a top view of the overall structure in the embodiment of this application.
[0020] Figure 3 This is a structural schematic diagram of the steel connection joint in the embodiment of this application.
[0021] Figure 4 This is a structural schematic diagram of the H-beam and connecting plate in the embodiments of this application.
[0022] Figure 5 This is a schematic diagram of the web structure in an embodiment of this application.
[0023] Figure 6 This is a schematic diagram of the connecting plate with bolt holes in an embodiment of this application.
[0024] Figure 7 This is a schematic diagram of the connecting plate with waist holes in an embodiment of this application.
[0025] Figure 8 This is a schematic diagram of the cover plate in an embodiment of this application.
[0026] Figure 9 This is a schematic diagram of the upper side friction plate in an embodiment of this application.
[0027] Reference numerals: 1. Precast concrete column; 2. Cantilever beam; 3. Precast concrete beam; 4. H-beam; 5. Web; 6. Flange; 7. Connecting plate; 8. Upper side friction plate; 9. Middle friction plate; 10. Lower side friction plate; 11. Bolt hole; 12. Waist hole; 13. Locking bolt; 14. Flat end; 15. Protruding end; 16. Insertion groove; 17. Cover plate; 18. Connecting bolt; 19. First connecting hole; 20. Second connecting hole. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0029] This application discloses a dry-connection precast concrete beam-column joint. (Refer to...) Figure 1 and Figure 2 A dry-connection precast concrete beam-column joint includes a precast concrete column 1, a precast concrete beam 3, and a steel connector located between the precast concrete column 1 and the precast concrete beam 3. A cantilever beam 2 is provided on the precast concrete column 1, and the precast concrete beam 3 is aligned with the cantilever beam 2. The length of the cantilever beam 2 is 1-1.5 times the thickness of the precast concrete beam 3 in the vertical direction. The steel connector is located between the cantilever beam 2 and the precast concrete beam 3, and its two ends are welded to the main reinforcement bars in the cantilever beam 2 and the precast concrete beam 3, respectively.
[0030] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The steel section connection joint includes two H-beams 4, two connecting plates 7 respectively inserted into the webs 5 of the two H-beams 4, and an upper side friction plate 8, a middle friction plate 9, and a lower side friction plate 10 located between the two H-beams 4. By cutting the corner of one end of the H-beam 4, the web 5 of the H-beam 4 is made to be L-shaped. At this time, the cut end of the H-beam 4 forms a protruding end 15, while the other end forms a flat end 14. The length of the protruding end 15 is 200-300 mm, and the width of the protruding end 15 is less than half the width of the web 5. Two H-beams 4 are coplanar and their protruding ends 15 are close to each other. One H-beam 4 is inverted and spliced onto the other upright H-beam 4. At this time, the flanges 6 of the two H-beams 4 are coplanar, and a gap is left between the two protruding ends 15. The width of this gap is the same as the thickness of the two connecting plates 7 after they are stacked. The two connecting plates 7 are stacked in the gap between the two protruding ends 15. One end of the connecting plate 7 is provided with an insertion groove 16 that is adapted to the web plate 5 of the flat end 14 of the H-beam 4. The length of the insertion groove 16 is 200 mm. When the connecting plate 7 is tightly inserted into the web plate 5 of the flat end 14 of the H-beam 4, the end of the connecting plate 7 away from the insertion groove 16 is flush with the end of the protruding end 15. The flat ends 14 of the two H-beams 4 extend to the cantilever beam 2 and the precast concrete beam 3 of the same length, with the length of the flat ends 14 extending into the cantilever beam 2 and the precast concrete beam 3 being 150-200 mm. During the fabrication process, the flat ends 14 of the two H-beams 4 are first welded to the main reinforcement bars in the cantilever beam 2 and the precast concrete beam 3, respectively, with a weld length of 100-200 mm. Then, the two H-beams 4 are connected to the cantilever beam 2 and the precast concrete beam 3 respectively by precast casting.
[0031] Reference Figure 3 , Figure 4 , Figure 5 and Figure 9The middle friction plate 9 is attached to one side of one of the connecting plates 7. The upper side friction plate 8 and the lower side friction plate 10 are located on both sides of the middle friction plate 9 and are attached to the web plate 5. The upper side friction plate 8 has four bolt holes 11 that pass through it. The four bolt holes 11 are spaced apart along the length of the upper side friction plate 8, and the four bolt holes 11 are arranged in pairs at both ends of the upper side friction plate 8. The lower side friction plate 10 and the upper side friction plate 8 have the same structural dimensions, and the length of each is 400-600 mm. Two waist holes 12 are provided through the web plates 5 of the flat ends 14 and the web plates 5 of the raised ends 15 of the two H-beams 4. When the two ends of the upper side friction plate 8 are respectively attached to the web plates 5 of the two H-beams 4, the four bolt holes 11 on the upper side friction plate 8 are aligned with the four waist holes 12. When the two ends of the lower side friction plate 10 are respectively attached to the web plates 5 of the two H-beams 4, the four bolt holes 11 on the lower side friction plate 10 are also aligned with the four waist holes 12. To ensure the upper side friction plate 8 and lower side friction plate 10 are stably mounted on the web plate 5, a locking bolt 13 is provided between a pair of bolt holes 11 and a waist hole 12 for fastening. The threaded part of the locking bolt 13 passes through the bolt holes 11 and the waist hole 12 in sequence, and the nut of the locking bolt 13 is threaded onto the threaded part. By tightening the nut, the large end of the nut and the threaded part abuts against the web plate 5 and the upper side friction plate 8 / lower side friction plate 10 respectively, thereby quickly and stably mounting the upper side friction plate 8 / lower side friction plate 10 onto the web plate 5. Considering the ease of installation of the locking bolt 13, the length of the waist hole 12 on the web plate 5 is 2.5-4 times the diameter of the locking bolt 13 threaded part, and the width of the waist hole 12 on the web plate 5 is 0.5-2 mm larger than the diameter of the locking bolt 13 threaded part.
[0032] Reference Figure 3 , Figure 4 , Figure 6 and Figure 7Two central friction plates 9 are provided, located on both sides of the web plate 5. The length of the central friction plate 9 is 200-300 mm. Two bolt holes 11 are provided through the central friction plate 9, and the two bolt holes 11 are spaced apart along the length of the central friction plate 9. Two sets of waist holes 12 are provided through a connecting plate 7 that is attached to the central friction plate 9. The two sets of waist holes 12 are located at the end of the connecting plate 7 away from the insertion groove 16, and the two sets of waist holes 12 are located on both sides of the insertion groove 16. There are two sets of waist holes 12 in each set. Two sets of bolt holes 11 are provided through a connecting plate 7 away from the central friction plate 9. The two sets of bolt holes 11 are located at the end of the connecting plate 7 away from the insertion groove 16, and the two sets of bolt holes 11 are located on both sides of the insertion groove 16. There are two sets of bolt holes 11 in each set. When the middle friction plate 9 and the two connecting plates 7 are fitted together, the two bolt holes 11 on the middle friction plate 9 are aligned one-to-one with the two waist holes 12 in the same group on one connecting plate 7, and the two bolt holes 11 in the same group on one connecting plate 7 are aligned one-to-one with the two waist holes 12 in the same group on the other connecting plate 7. In order to ensure that the middle friction plate 9 can be stably connected to the two connecting plates 7, a locking bolt 13 is provided in each of the two bolt holes 11 of the middle friction plate 9. The screw of the locking bolt 13 passes through the bolt hole 11 on the middle friction plate 9, the waist hole 12 on one connecting plate 7 and the bolt hole 11 on the other connecting plate 7 in sequence. The nut of the locking bolt 13 is threaded on the screw. By tightening the nut, the large end of the nut and the screw abuts against the middle friction plate 9 and the connecting plate 7 respectively, thereby stably connecting the middle friction plate 9 and the two connecting plates 7. Considering the ease of installation of the locking bolt 13, the length of the slot 12 on the connecting plate 7 is 2-3 times the diameter of the locking bolt 13, and the width of the slot 12 on the connecting plate 7 is 0.5-2 mm larger than the diameter of the locking bolt 13.
[0033] The bolt holes 11 on the upper side friction plate 8 and the lower side friction plate 10 are connected to the waist holes 12 on the web plate 5 by locking bolts 13, so that the upper side friction plate 8 and the lower side friction plate 10 are pressed against the web plates 5 of the two H-beams 4, and a large friction is formed between the upper side friction plate 8, the lower side friction plate 10 and the web plate 5; the bolt holes 11 on the middle friction plate 9, the bolt holes 11 on one connecting plate 7 and the waist holes 12 on another connecting plate 7 are also connected by locking bolts 13, so that the middle friction plate 9 is pressed against the two connecting plates 7, and a large friction is also formed between the middle friction plate 9 and the two connecting plates 7. The formation of this friction gives the concrete beam-column joint good seismic resistance. During an earthquake, the precast concrete column 1 and the precast concrete beam 3 can easily cause the two H-beams 4 to move relative to each other in a direction that is closer to or further away from each other. Since the length of the waist hole 12 is greater than the diameter of the bolt hole 11, a certain amount of space is reserved between the two H-beams 4, which reduces the risk of the bolt 13 being broken.
[0034] Reference Figure 3 , Figure 4 and Figure 8 Two sets of first connecting holes 19 are provided on both sides of the flanges 6 of the H-beam 4. The two sets of first connecting holes 19 are located on both sides of the web 5. There are three first connecting holes 19 in each set, which are spaced apart along the length of the flange 6. The first connecting holes 19 are located on the end of the H-beam 4 away from the precast concrete column 1 / precast concrete beam 3. A cover plate 17 is attached to the side of the flange 6 away from the web 5. The length of the cover plate 17 is the same as the length of the upper side friction plate 8, and the width of the cover plate 17 is the same as the width of the flange 6. The cover plate 17 is made of shape memory alloy. The two ends of the cover plate 17 extend to the two H-beams 4 respectively. Multiple second connecting holes 20 are provided on the cover plate 17, corresponding one-to-one with the multiple first connecting holes 19. A connecting bolt 18 is provided between a pair of first connecting holes 19 and second connecting holes 20. The cover plate 17 can be stably locked onto the flange 6 by means of the connecting bolt 18. During an earthquake, the precast concrete column 1 and precast concrete beam 3 can easily cause the two H-beams 4 to bend. Since the cover plates 17 fixed on both sides of the connection between the two H-beams 4 are made of shape memory alloy, the connection between the two H-beams 4 has good seismic performance.
[0035] The implementation principle of a dry-connected precast concrete beam-column joint according to an embodiment of this application is as follows: First, a precast concrete column 1 and a precast concrete beam 3 are fabricated. During the fabrication of the precast concrete column 1, the flat end 14 of an H-beam 4 is welded to the main reinforcement of the cantilever beam 2, and then cast in a mold, resulting in a precast concrete column 1 in which part of the H-beam 4 is embedded in the cantilever beam 2. Similarly, during the fabrication of the precast concrete beam 3, another H-beam 4 is partially embedded in the precast concrete beam 3, and the protruding ends 15 of the H-beam 4 embedded in the precast concrete beam 3 and the H-beam 4 in the cantilever beam 2 are in opposite directions. Afterward, the precast concrete column 1 is hoisted to the designated position and installed. Then, the precast concrete beam 3 is hoisted, and the position of the precast concrete beam 3 is adjusted to align its height with that of the cantilever beam 2 on the precast concrete column 1. Then, the two connecting plates 7 are respectively clamped onto the two H-beams 4, and the precast concrete beam 3 is hoisted close to the precast concrete column 1, so that the two H-beams 4 are aligned at their ends. At this time, the two connecting plates 7 are stacked between the two protruding ends 15. Then, the cover plate 17 is placed on the flange 6, and the position of the precast concrete beam 3 is finely adjusted to ensure that the multiple second connecting holes 20 on the cover plate 17 are aligned with the multiple first connecting holes 19 on the flange 6, and the multiple bolt holes 11 and multiple waist holes 12 on the two connecting plates 7 are aligned. Finally, the upper side friction plate 8 and the lower side friction plate 10 are locked onto the web plate 5 by locking bolts 13, the middle friction plate 9 is locked onto the connecting plate 7, and the cover plate 17 is locked onto the flange 6 by connecting bolts 18, thus completing the dry connection of the concrete beam-column joint.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A dry-connection precast concrete beam-column joint, comprising a precast concrete column, a precast concrete beam, and a steel connection joint located between the precast concrete column and the precast concrete beam, characterized in that, The steel section connection joint includes two H-beams spliced at both ends, connecting plates inserted into the webs of the two H-beams at their respective ends close to each other, and upper, middle, and lower side friction plates located between the two H-beams. The opposite ends of the two H-beams are connected to a precast concrete column and a precast concrete beam, respectively. The connecting plates on the two H-beams are stacked, with the middle friction plate attached to one side of one of the connecting plates. The upper and lower side friction plates are located on both sides of the middle friction plate and are attached to the web. Multiple bolt holes are drilled through the upper, middle, and lower side friction plates and the connecting plate away from the middle friction plate. Waist holes are drilled through the webs of the two H-beams and the other connecting plate at the positions corresponding to the bolt holes. Locking bolts for fastening are provided between the bolt holes and the waist holes.
2. The dry-connection precast concrete beam-column joint according to claim 1, characterized in that, The web of the H-beam is L-shaped, with one end being a flat end and the other end being a raised end. One H-beam is inverted and spliced onto another upright H-beam. Two connecting plates are stacked between the two raised ends. One end of the connecting plate has an insertion groove that is compatible with the web of the flat end of the H-beam. When the connecting plate is tightly inserted into the web of the flat end of the H-beam, the end of the connecting plate away from the insertion groove is flush with the end of the raised end.
3. The dry-connection prefabricated concrete beam-column joint according to claim 2, characterized in that, Multiple waist holes on the connecting plate are evenly distributed on both sides of the insertion slot, and two friction plates are provided in the middle, located on both sides of the web plate respectively.
4. The dry-connection precast concrete beam-column joint according to claim 3, characterized in that, Both sides of the H-beam are fitted with cover plates on opposite sides of the flanges. The two ends of the cover plates extend to the two H-beams respectively. The H-beams are provided with connecting bolts for locking the cover plates to the flanges.
5. A dry-connection precast concrete beam-column joint according to claim 4, characterized in that, The cover plate is made of shape memory alloy.
6. A dry-connection precast concrete beam-column joint according to claim 5, characterized in that, The width of the cover plate is the same as the width of the flange.
7. A dry-connection precast concrete beam-column joint according to claim 2, characterized in that, The precast concrete column is equipped with a cantilever beam, which is aligned with the cantilever beam. The flat ends of the two H-beams are embedded in the precast concrete beam and the cantilever beam for the same length.
8. A dry-connection precast concrete beam-column joint according to claim 2, characterized in that, The length of the protruding end of the H-beam is 200-300 mm, and the length of the insertion groove on the connecting plate is 200 mm.
9. A dry-connection precast concrete beam-column joint according to claim 1, characterized in that, The length of the waist hole on the web plate is 2.5-4 times the diameter of the locking bolt thread.
10. A dry-connection precast concrete beam-column joint according to claim 1, characterized in that, The length of the waist hole on the connecting plate is 2-3 times the diameter of the locking bolt.