An earthquake-resistant replaceable assembled bone-type weakened connection joint and its assembly method

Abstract

The present invention discloses a post-earthquake replaceable prefabricated bone-type weakened connection joint and its assembly method, belonging to the technical field of prefabricated buildings. It includes a precast square concrete-filled steel tube column, an I-shaped short beam is connected to the side wall of the square concrete-filled steel tube column, an I-shaped steel beam is arranged at the end of the short beam, a weakened connection section of a bone structure is arranged between the short beam and the steel beam, fixed end plates are arranged at the opposite ends of the short beam and the steel beam, connection end plates are arranged at both ends of the weakened connection section of the bone structure, and the connection end plates and the fixed end plates are detachably connected by bolts; sleeves parallel to the weakened connection section are arranged on the opposite end faces of adjacent connection end plates, a sliding seat is coaxially and slidably connected in the sleeve, and an elastic energy dissipation member is arranged between the sliding seat and the sleeve, and a steel wire rope is detachably connected between adjacent sliding seats; the purpose is to solve the problem that when repairing existing connection joints after earthquake damage, it is necessary to replace components as a whole, the repair process is complex, and the repair difficulty is large.

Description

Technical Field

[0001] The invention belongs to the technical field of prefabricated buildings, and particularly relates to a replaceable prefabricated bone-type weakened connection node after earthquake and an assembly method thereof. Background Technique

[0002] To prevent the brittle failure of steel beam-column welded joints under earthquake action, two forms of joint strengthening and joint weakening are mostly adopted to improve the beam-column welded joints. The purpose of both is to move the plastic hinge outwards, so as to protect the relatively vulnerable beam-column welded area, and further achieve the purpose of ductility design.

[0003] At present, most improved connection joints require on-site welding operations, and the weld quality is difficult to guarantee. Moreover, the weakened or strengthened parts are all in the overall structure. When repairing after earthquake damage, the components need to be replaced as a whole, and the repair process is complex and the repair difficulty is large. Summary of the Invention

[0004] In view of this, the invention discloses a replaceable prefabricated bone-type weakened connection node after earthquake and an assembly method thereof, aiming to solve the problems that when repairing existing connection nodes after earthquake damage, the components need to be replaced as a whole, the repair process is complex, and the repair difficulty is large.

[0005] To achieve the above object, the invention provides the following technical solutions:

[0006] A replaceable prefabricated bone-type weakened connection node after earthquake includes a prefabricated square concrete-filled steel tube column. An I-shaped short beam is connected to the side wall of the square concrete-filled steel tube column. An I-shaped steel beam is arranged at the end of the short beam. A weakened connection section with a bone structure is arranged between the short beam and the steel beam. Fixed end plates are arranged at the opposite ends of the short beam and the steel beam. Connection end plates are arranged at both ends of the weakened connection section with a bone structure. The connection end plates and the fixed end plates are detachably connected by bolts. Sleeves parallel to the weakened connection section are arranged on the opposite end faces of adjacent connection end plates. A sliding seat is coaxially and slidably connected in the sleeve, and an elastic energy dissipation member is arranged between the sliding seat and the sleeve. A steel wire rope is detachably connected between adjacent sliding seats.

[0007] In this solution, the prefabrication work of each structure is completed in the factory, and only bolt installation work is required on site, which is convenient for construction. It can make the plastic hinge and damage concentrate at the weakened connection section, achieving the purpose of moving the plastic hinge outwards, with excellent mechanical properties. When repairing after earthquake, only the weakened connection section needs to be replaced to complete the node repair work. At the same time, after the weakened connection section breaks, an elastic connection is formed between the break and the steel beam through the steel wire rope, the sliding seat, the sleeve and the elastic energy dissipation member. While maintaining the connection relationship between the short beam and the steel beam, it can also dissipate energy elastically to prevent further damage to the connection node.

[0008] Furthermore, the fixed end plate includes an installation main body and a connection main body detachably connected to the connection end portion. One end of the installation main body is provided with a connection groove for accommodating the steel beam and the web of the short beam. The other end of the installation main body is fixedly connected to the connection main body. Horizontal moving grooves are provided on both sides of the webs of the steel beam and the short beam. A plurality of card slots are provided on the upper and lower end faces of the moving groove. Two straight plates are symmetrically arranged in the moving groove. A plurality of card blocks corresponding to the card slots are arranged on the opposite end faces of adjacent straight plates. The straight plates are vertically slidably connected to the side wall of the connection groove. A top plate is arranged between adjacent straight plates. An adjusting shaft rotatably connected to the side wall of the connection groove is fixed in the middle of the top plate, and the adjusting shaft penetrates through the installation main body. Horizontally arranged connecting plates are vertically slidably connected to the upper and lower ends on both sides of the installation main body. A plurality of limiting grooves perpendicular to the weakened connection section are provided on the opposite end faces of adjacent connecting plates on the same side. Limiting protrusions cooperating with the limiting grooves are provided on the flange plates of the steel beam and the short beam. A jacking structure is arranged between adjacent connecting plates on the same side.

[0009] When installing the weakened connection section, the connection end plate is fixed to the corresponding connection main body through bolts. Then, horizontally move the weakened connection section and the fixed end portion so that the limiting protrusions are aligned with the limiting grooves one by one. Rotate the main rod, and use the threaded connection between the main rod and the connection sleeve to drive the connecting plates to slide in opposite directions until the straight plates abut against the flange plates of the steel beam and the short beam. At this time, the limiting protrusions are engaged with the limiting grooves. Rotate the adjusting shaft through the disc body, thereby driving the top plate to rotate. Use the top plate to push the adjacent straight plates to move away from each other until the card blocks on the straight plates are engaged with the card slots, completing the installation of the weakened connection section. When performing maintenance after an earthquake, when only the weakened connection section is damaged, remove the bolts between the connection end plate and the connection main body and install a new weakened connection section. If both the fixed end plate and the weakened connection section are damaged, then rotate the main rod and the disc body in the reverse direction to simultaneously remove the fixed end plate and the weakened connection section for replacement, avoiding deformation at the connection between the steel beam, the short beam and the weakened connection section, which is not conducive to the removal and replacement of the weakened connection section.

[0010] Furthermore, the jacking structure includes a main rod, and connection sleeves are threadedly connected to both ends of the main rod. The connection sleeves are fixedly connected to the corresponding connecting plates.

[0011] Furthermore, reinforcing ribs fixedly connected to the connection main body are fixed on both sides of the installation main body.

[0012] Furthermore, a disc body is coaxially fixed to the end of the adjusting shaft extending out of the installation main body, and the disc body is locked with the installation main body through a pin.

[0013] An assembling method for a post-earthquake replaceable assembled bone-type weakened connection joint includes the following steps:

[0014] 1), Prefabrication: Prefabricate square concrete-filled steel tubular columns in the factory, and weld short beams to the square concrete-filled steel tubular columns; install structural components such as connecting end plates and steel wire ropes on the weakened connection section;

[0015] 2), Assembly: After installing the square concrete-filled steel tubular column and the steel beam, install the installation main body at the ends of the short beam and the steel beam respectively, ensuring that the straight plate slides into the corresponding moving groove; then install the weakened connection section, and fix the connecting end plate to the corresponding connecting main body through bolts; then horizontally move the weakened connection section and the fixed end, so that the limiting protrusions and the limiting grooves are aligned one by one; rotate the main rod, and use the threaded connection between the main rod and the connecting sleeve to drive the connecting plate to slide in the opposite direction until the straight plate abuts against the flange plates of the steel beam and the short beam. At this time, the limiting protrusions and the limiting grooves are engaged; rotate the adjusting shaft through the disc body, thereby driving the top plate to rotate, and use the top plate to push the adjacent straight plates to move away from each other until the clamping blocks on the straight plates are engaged with the card slots, and lock the disc body through a pin to complete the installation of the weakened connection section, and perform non-bonding treatment on the above structures;

[0016] 3), Post-earthquake maintenance; When performing maintenance after an earthquake, only when the weakened connection section is damaged, remove the bolts between the connecting end plate and the connecting main body, and install a new weakened connection section; if both the fixed end plate and the weakened connection section are damaged, then rotate the main rod and the disc body in the reverse direction, and remove the fixed end plate and the weakened connection section at the same time for replacement.

[0017] Other advantages, objectives and features of the present invention will be described in the subsequent specification, and to some extent will be obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the steel beam and the short beam in an embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the fixed end plate in an embodiment of the present invention;

[0022] Figure 4 It is a horizontal cross-sectional view of the fixed end plate in an embodiment of the present invention;

[0023] Figure 5 It is a longitudinal cross-sectional view of the weakened connection section in an embodiment of the present invention.

[0024] The reference signs in the drawings are as follows: concrete-filled square steel tube column 1, short beam 2, steel beam 3, weakened connection section 4, connection end plate 5, sleeve 6, sliding seat 7, elastic energy dissipation member 8, steel wire rope 9, installation main body 10, connection main body 11, moving groove 12, clamping groove 13, straight plate 14, clamping block 15, top plate 16, adjusting shaft 17, connecting plate 18, limiting projection 19, limiting groove 20, main rod 21, connecting sleeve 22, reinforcing rib 23, disc body 24. Detailed implementation manners

[0025] As Figures 1 to 5 shown:

[0026] An earthquake-replaceable prefabricated bone-type weakened connection joint includes a prefabricated concrete-filled square steel tube column 1. An I-shaped short beam 2 is connected to the side wall of the concrete-filled square steel tube column 1. An I-shaped steel beam 3 is arranged at the end of the short beam 2. A bone-type weakened connection section 4 is arranged between the short beam 2 and the steel beam 3. Fixed end plates are arranged at the opposite ends of the short beam 2 and the steel beam 3. Connection end plates 5 are arranged at both ends of the bone-type weakened connection section 4. The connection end plates 5 and the fixed end plates are detachably connected by bolts; Parallel to the weakened connection section 4, sleeves 6 are arranged on the opposite end faces of adjacent connection end plates 5. A sliding seat 7 is coaxially and slidably connected in the sleeve 6, and an elastic energy dissipation member 8 is arranged between the sliding seat 7 and the sleeve 6. A steel wire rope 9 is detachably connected between adjacent sliding seats 7.

[0027] In this solution, the prefabrication work of each structure is completed in the factory. Only bolt installation work is required on site, which is convenient for construction. It can make the plastic hinge and damage concentrate at the weakened connection section 4, achieving the purpose of moving the plastic hinge outwards, and has excellent mechanical properties. When repairing after an earthquake, only the weakened connection section 4 needs to be replaced to complete the joint repair work; At the same time, after the weakened connection section 4 breaks, an elastic connection is formed between the break and the steel beam 3 through the steel wire rope 9, the sliding seat 7, the sleeve 6 and the elastic energy dissipation member 8. While maintaining the connection relationship between the short beam 2 and the steel beam 3, elastic energy dissipation can also be carried out to prevent further damage to the connection joint.

[0028] In this embodiment, the fixed end plate includes an installation main body 10 and a connection main body 11 detachably connected to the connection end. One end of the installation main body 10 is provided with a connection groove for accommodating the webs of the steel beam 3 and the short beam 2. The other end of the installation main body 10 is fixedly connected to the connection main body 11. Horizontal moving grooves 12 are provided on both sides of the webs of the steel beam 3 and the short beam 2. A number of clamping grooves 13 are provided on the upper and lower end faces of the moving groove 12. Two straight plates 14 are symmetrically arranged in the moving groove 12. A number of clamping blocks 15 corresponding to the clamping grooves 13 are provided on the opposite end faces of adjacent straight plates 14. The straight plates 14 are vertically slidably connected to the side wall of the connection groove. A top plate 16 is arranged between adjacent straight plates 14. A regulating shaft 17 rotatably connected to the side wall of the connection groove is fixed in the middle of the top plate 16, and the regulating shaft 17 penetrates through the installation main body 10. On the upper and lower ends of both sides of the installation main body 10, horizontally arranged connecting plates 18 are vertically slidably connected. A number of limiting grooves 20 perpendicular to the weakened connection section 4 are provided on the opposite end faces of adjacent connecting plates 18 on the same side. Limiting protrusions 19 cooperating with the limiting grooves 20 are arranged on the flange plates of the steel beam 3 and the short beam 2. A jacking structure for pushing the connecting plates 18 to move is arranged between adjacent connecting plates 18 on the same side.

[0029] When installing the weakened connection section 4, the connection end plate 5 is fixed to the corresponding connection main body 11 by bolts; then the weakened connection section 4 and the fixed end are horizontally moved so that the limiting protrusions 19 are aligned with the limiting grooves 20 one by one; the main rod 21 is rotated, and the threaded connection between the main rod 21 and the connection sleeve 22 is used to drive the connecting plates 18 to slide in opposite directions until the straight plates 14 abut against the flange plates of the steel beam 3 and the short beam 2. At this time, the limiting protrusions 19 are engaged with the limiting grooves 20; the regulating shaft 17 is rotated by the disc body 24, thereby driving the top plate 16 to rotate. The top plate 16 is used to push the adjacent straight plates 14 to move away from each other until the clamping blocks 15 on the straight plates 14 are engaged with the clamping grooves 13, completing the installation of the weakened connection section 4; when performing maintenance after an earthquake, when only the weakened connection section 4 is damaged, the bolts between the connection end plate 5 and the connection main body 11 are removed, and a new weakened connection section 4 is installed; if both the fixed end plate and the weakened connection section 4 are damaged, the main rod 21 and the disc body 24 are rotated in the reverse direction, and the fixed end plate and the weakened connection section 4 are removed and replaced simultaneously; this avoids deformation at the connection between the steel beam 3, the short beam 2 and the weakened connection section 4, which is not conducive to the removal and replacement of the weakened connection section 4.

[0030] In this embodiment, the jacking structure includes a main rod 21. Connection sleeves 22 are threadedly connected to both ends of the main rod 21. The connection sleeves 22 are fixedly connected to the corresponding connecting plates 18. Only by rotating the main rod 21, the threaded connection between the main rod 21 and the connection sleeve 22 can be used to push the connecting plates 18 at both ends to move towards or away from each other.

[0031] In this embodiment, reinforcing ribs 23 fixedly connected to the connecting body 11 are fixed on both sides of the mounting body 10 to enhance the connection strength between the mounting body 10 and the connecting body 11.

[0032] In this embodiment, a disc body 24 is coaxially fixed to the end of the adjusting shaft 17 extending out of the mounting body 10, and the disc body 24 is locked with the mounting body 10 through a pin (not shown in the figure).

[0033] An assembly method for a post-earthquake replaceable prefabricated bone-type weakened connection joint includes the following steps:

[0034] 1). Prefabrication: Prefabricate the square concrete-filled steel tube column 1 in the factory, and weld the short beam 2 to the square concrete-filled steel tube column 1; install structures such as the connecting end plate 5 and the steel wire rope 9 on the weakened connection section 4;

[0035] 2). Assembly: After installing the square concrete-filled steel tube column 1 and the steel beam 3, install the mounting body 10 at the ends of the short beam 2 and the steel beam 3 respectively, ensuring that the straight plate 14 slides into the corresponding moving groove 12; then install the weakened connection section 4, and fix the connecting end plate 5 to the corresponding connecting body 11 through bolts; then horizontally move the weakened connection section 4 and the fixed end to make the limit protrusions 19 and the limit grooves 20 face each other one by one; rotate the main rod 21, and use the threaded connection between the main rod 21 and the connecting sleeve 22 to drive the connecting plate 18 to slide in the opposite direction until the straight plate 14 abuts against the flange plates of the steel beam 3 and the short beam 2. At this time, the limit protrusions 19 and the limit grooves 20 are engaged; rotate the adjusting shaft 17 through the disc body 24, thereby driving the top plate 16 to rotate, and use the top plate 16 to push the adjacent straight plates 14 to move away from each other until the locking blocks 15 on the straight plates 14 are engaged with the card slots 13, and lock the disc body 24 through a pin to complete the installation of the weakened connection section 4, and perform non-bonding treatment on the above structures;

[0036] 3). Post-earthquake maintenance; When performing maintenance after an earthquake, when only the weakened connection section 4 is damaged, remove the bolts between the connecting end plate 5 and the connecting body 11, and install a new weakened connection section 4; if both the fixed end plate and the weakened connection section 4 are damaged, reverse-rotate the main rod 21 and the disc body 24, and remove and replace the fixed end plate and the weakened connection section 4 at the same time.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An earthquake-resistant replaceable assembled bone-type weakened connection joint, characterized in that: It includes a prefabricated concrete-filled square steel tube column. An I-shaped short beam is connected to the side wall of the concrete-filled square steel tube column. An I-shaped steel beam is arranged at the end of the short beam. A weakened connection section with a bone structure is arranged between the short beam and the steel beam. Fixed end plates are arranged at the opposite ends of the short beam and the steel beam. Connection end plates are arranged at both ends of the weakened connection section with the bone structure. The connection end plates and the fixed end plates are detachably connected by bolts. Sleeves parallel to the weakened connection section are arranged on the opposite end faces of adjacent connection end plates. A sliding seat is coaxially and slidably connected in the sleeve, and an elastic energy dissipation member is arranged between the sliding seat and the sleeve. A steel wire rope is detachably connected between adjacent sliding seats. The fixed end plate includes an installation main body and a connection main body detachably connected to the connection end. A connection groove for accommodating the web of the steel beam and the short beam is arranged at one end of the installation main body. The other end of the installation main body is fixedly connected to the connection main body. Horizontal moving grooves are arranged on both sides of the webs of the steel beam and the short beam. A number of clamping grooves are arranged on the upper and lower end faces of the moving groove. Two straight plates are symmetrically arranged in the moving groove. A number of clamping blocks corresponding to the clamping grooves are arranged on the opposite end faces of adjacent straight plates. The straight plates are vertically and slidably connected to the side wall of the connection groove. A top plate is arranged between adjacent straight plates. An adjusting shaft rotatably connected to the side wall of the connection groove is fixed in the middle of the top plate, and the adjusting shaft penetrates through the installation main body. Horizontal connecting plates are vertically and slidably connected to the upper and lower ends on both sides of the installation main body. A number of limiting grooves perpendicular to the weakened connection section horizontally are arranged on the opposite end faces of adjacent connecting plates on the same side. Limiting protrusions cooperating with the limiting grooves are arranged on the flange plates of the steel beam and the short beam. A jacking structure is arranged between adjacent connecting plates on the same side.

2. The replaceable prefabricated bone-type weakened connection joint after earthquake according to claim 1, wherein: The jacking structure includes a main rod. Connecting sleeves are threadedly connected to both ends of the main rod. The connecting sleeves are fixedly connected to the corresponding connecting plates.

3. The post-earthquake replaceable prefabricated bone-type weakened connection joint according to claim 2, characterized in that: Reinforcing ribs fixedly connected to the connection main body are fixed on both sides of the installation main body.

4. The replaceable prefabricated bone-type weakened connection joint after earthquake according to claim 3, characterized in that: A disc is coaxially fixed to the end of the adjusting shaft extending out of the installation main body. The disc and the installation main body are locked by a pin.

5. The assembling method of an earthquake-resistant replaceable prefabricated bone-type weakened connection joint according to claim 4, characterized in that, It includes the following steps: 1). Prefabrication: Prefabricate the concrete-filled square steel tube column in the factory, and weld the short beam to the concrete-filled square steel tube column; install structures such as connection end plates and steel wire ropes on the weakened connection section; 2). Assembly: After installing the concrete-filled square steel tube column and the steel beam, install the installation main body at the ends of the short beam and the steel beam respectively, and ensure that the straight plates slide into the corresponding moving grooves; then install the weakened connection section, and fix the connection end plate to the corresponding connection main body by bolts; then horizontally move the weakened connection section and the fixed end, so that the limiting protrusions and the limiting grooves are aligned one by one; rotate the main rod, and use the threaded connection between the main rod and the connecting sleeve to drive the connecting plates to slide in opposite directions until the straight plates abut against the flange plates of the steel beam and the short beam. At this time, the limiting protrusions and the limiting grooves are engaged; rotate the adjusting shaft through the disc, so as to drive the top plate to rotate, and use the top plate to push the adjacent straight plates to move away from each other until the clamping blocks on the straight plates are engaged with the clamping grooves, and lock the disc with a pin to complete the installation of the weakened connection section, and perform a non-bonding treatment on the above structures; 3) Post-earthquake maintenance: When performing maintenance after an earthquake, only when the weakened connection section is damaged, remove the bolts between the connection end plate and the connection main body and install a new weakened connection section; if both the fixed end plate and the weakened connection section are damaged, reverse-rotate the main rod and the disc body, and remove and replace the fixed end plate and the weakened connection section simultaneously.

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