CN112376933B - Connecting device and method for buckling restrained brace and existing concrete beam connecting node - Google Patents
Connecting device and method for buckling restrained brace and existing concrete beam connecting node Download PDFInfo
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- CN112376933B CN112376933B CN202011213214.9A CN202011213214A CN112376933B CN 112376933 B CN112376933 B CN 112376933B CN 202011213214 A CN202011213214 A CN 202011213214A CN 112376933 B CN112376933 B CN 112376933B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 105
- 239000010959 steel Substances 0.000 claims abstract description 105
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 238000004873 anchoring Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a connecting device and a method for a buckling restrained brace and an existing concrete beam connecting node, wherein the device comprises a plurality of U-shaped steel plates which are arranged along the length direction of the existing concrete beam and an existing floor slab on the existing concrete beam; the split bolts fix the U-shaped steel plate on the existing concrete beam; the sealing bottom plate is arranged on the lower surface of the existing concrete beam and welded with the U-shaped steel plate; an anchor bolt for anchoring the bottom sealing plate on the existing concrete beam; and the node plate is vertically arranged on the lower surface of the sealing bottom plate. The invention can improve the reliable connection between the existing concrete beam and the buckling restrained brace.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a connecting device and a connecting method for a buckling restrained brace and an existing concrete beam connecting node.
Background
In the reinforcement and transformation engineering of the superstructure of the existing building, the conventional method is to increase the column section, the beam section or the support between the ordinary columns to consume energy, and resist the earthquake force. The method has the defects that when the cross section of the beam or the column is large in enlarged area, the use function of the building is affected, the construction cost is high, the connection node of the common support and the original concrete member has large damage to the original structure, and the construction difficulty is high. In the prior art, the buckling restrained brace is connected to the existing concrete beam to resist earthquake force, and the buckling restrained brace has the defects that the existing concrete beam is low in strength and easy to damage at a connecting node, and when the buckling restrained brace is subjected to axial force vibration, the buckling restrained brace is easy to loosen and even separate from the existing concrete beam, so that the buckling restrained brace is poor in reliable connection with the existing concrete beam.
Disclosure of Invention
The invention aims to solve the technical problem of providing a connecting device and a connecting method for connecting a buckling restrained brace with an existing concrete beam so as to improve the reliable connection between the buckling restrained brace and the buckling restrained brace.
In order to solve the technical problems, the invention provides a technical scheme that: a connection device for a buckling restrained brace and an existing concrete beam connection node, comprising:
The U-shaped steel plates are arranged along the length direction of the existing concrete beam and the existing floor slab on the existing concrete beam; each U-shaped steel plate comprises a transverse steel plate and two vertical steel plates vertically connected downwards along two ends of the transverse steel plate; the transverse steel plates are arranged on the existing floor slab, the two vertical steel plates extend downwards along the two sides of the existing concrete beam while avoiding the steel bars of the existing floor slab, and the lower ends of the vertical steel plates are flush with the lower surface of the existing concrete beam;
The split bolts penetrate through the existing concrete beam to fix the U-shaped steel plate on the existing concrete beam;
The sealing bottom plate is arranged on the lower surface of the existing concrete beam, the sealing bottom plate is welded with the vertical steel plates, the length of the sealing bottom plate is larger than or equal to the distance between the U-shaped steel plates at the beginning and the end, and the width of the sealing bottom plate is larger than or equal to the width between two vertical steel plates in the U-shaped steel plates;
the anchor bolts penetrate through the bottom sealing plate and are arranged on the existing concrete beam in an anchoring manner;
And the node plate is vertically arranged on the lower surface of the sealing bottom plate.
Further, the connecting device for the buckling restrained brace and the existing concrete beam connecting node provided by the invention further comprises:
The switching assembly comprises an end plate, an adapter plate vertically connected to the end plate and a stiffening plate arranged between the end plate and the adapter plate;
and the buckling restrained brace is arranged on the sealing bottom plate and the node plate through the switching assembly.
Furthermore, the buckling restrained brace and the connecting device of the existing concrete beam connecting node provided by the invention are characterized in that the adapter plate comprises a horizontal plane connected with the bottom sealing plate and a vertical plane connected with the node plate.
Furthermore, according to the connecting device for the buckling restrained brace and the existing concrete beam connecting node, through holes for the split bolts to pass through are formed in each vertical steel plate.
Furthermore, the buckling restrained brace and the connecting device of the existing concrete beam connecting node provided by the invention have a plurality of split bolts, and the split bolts are longitudinally distributed along the existing concrete beam.
Furthermore, the buckling restrained brace and the connecting device of the existing concrete beam connecting node are provided, and the sealing bottom plate is a whole plate or a plurality of plates are spliced.
Furthermore, the buckling restrained brace and the connecting device of the existing concrete beam connecting node are provided, the anchoring bolts are chemical anchor bolts, and the chemical anchor bolts are distributed in a plurality of matrixes.
Further, the connecting device for connecting the buckling restrained brace and the existing concrete beam comprises a first plate and a second plate, wherein the first plate is arranged in the length direction of the existing concrete beam in a crisscross mode, and the second plate is arranged in the width direction of the existing concrete beam.
In order to solve the technical problems, the invention provides another technical scheme as follows: the construction method of the connecting device for the buckling restrained brace and the existing concrete beam connecting node comprises the following steps:
Forming a hole on the existing floor slab by avoiding the steel bars of the existing floor slab on the connecting node of the existing concrete beam;
drilling construction bolt holes on the existing concrete beam;
installing a U-shaped steel plate through the hole, so that a transverse steel plate of the U-shaped steel plate is arranged on an existing floor slab, and two vertical steel plates extend downwards along two sides of an existing concrete beam through the hole;
two vertical steel plates of the U-shaped steel plate are fixed on the existing concrete beam through opposite-pull bolts penetrating through the bolt holes;
after all the U-shaped steel plates and the split bolts on the U-shaped steel plates are installed, installing a sealing bottom plate on the lower surface of the existing concrete beam, and welding the sealing bottom plate with the vertical steel plates;
Fixing the bottom sealing plate on the existing concrete beam through an anchor bolt;
and mounting a node plate on the lower surface of the back cover plate so that the node plate is welded on the back cover plate.
In order to solve the technical problem, the invention provides another technical scheme as follows: a method for connecting buckling restrained brace with existing concrete beam connection node,
Constructing a connecting device according to the construction method of the connecting device of the buckling restrained brace and the existing concrete beam connecting node;
Installing a switching assembly on the buckling restrained brace;
and welding the switching assembly on the bottom sealing plate and the node plate of the connecting device.
Compared with the prior art, the invention has the following beneficial effects:
according to the connecting device and method for the buckling restrained brace and the existing concrete beam connecting node, the existing concrete beam is wrapped by the U-shaped steel plate penetrating through the existing floor slab and the sealing bottom plate located on the lower surface of the existing concrete beam, the U-shaped steel plate is fixed on the existing concrete beam through the split bolts, the sealing bottom plate is reinforced and fixed on the existing concrete beam through the anchor bolts, so that a relatively firm integral structure is formed between the U-shaped steel plate and the sealing bottom plate and the existing concrete beam, and the axial force transmitted by the buckling restrained brace is resisted jointly. Because buckling restrained brace can be directly or through the switching subassembly connection on the back cover, then buckling restrained brace transmission's axial force is born by sealing bottom plate, U shaped steel board and existing concrete beam jointly, and not only born by existing concrete beam, then the junction can not cause the damage defect such as concrete fracture to existing concrete beam, also can not lead to buckling restrained brace and existing concrete beam's the connection to produce not hard up, the phenomenon that breaks away from mutually owing to axial force transmission, consequently can improve buckling restrained brace and existing concrete beam's reliability and be connected.
According to the connecting device and method for the buckling restrained brace and the existing concrete beam connecting node, when the U-shaped steel plate penetrates through the existing floor, the steel bars of the existing floor are prevented from being cut off, and the influence on the structural stability and structural strength of the existing floor is small. The influence of the split bolts and the anchoring bolts on the structural strength and the structural stability of the existing concrete beam is small, and the influence of safety performance on the existing floor slab and the existing concrete beam is avoided, so that the effect of controllable risk is achieved.
The connecting device and the method for the buckling restrained brace and the existing concrete beam connecting node have the advantages of simple structure and convenience in installation compared with the construction modes of increasing the beam section, increasing the inter-column support and the like.
According to the connecting device and method for the buckling restrained brace and the existing concrete beam connecting node, the U-shaped steel plate and the sealing bottom plate play a role in hoop reinforcement on the existing concrete beam, the split bolts play a role in firmly connecting the U-shaped steel plate and the anchoring bolts with the sealing bottom plate, and the connecting device and method have the effects of simple construction process and reliable construction quality.
The connecting device for the buckling restrained brace and the existing concrete beam connecting node provided by the invention consists of the U-shaped steel plate, the sealing bottom plate, the split bolts, the anchor bolts and the node plates, and can solve the problem of reliable connection between the buckling restrained brace and the existing concrete beam in the reinforcing and reforming engineering of the existing building, so that the purpose of shock absorption is achieved through the buckling restrained brace, earthquake force is resisted, and the engineering cost is lower.
Drawings
Fig. 1 is a schematic structural view of a connection device 200;
FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 1 taken along line B-B;
FIG. 4 is a schematic cross-sectional view of FIG. 1 taken along line C-C;
FIG. 5 is a schematic cross-sectional view of an existing concrete beam and an existing floor slab;
FIG. 6 is a schematic structural view of a U-shaped steel plate;
FIG. 7 is a schematic view of a buckling restrained brace and an existing concrete beam in an installed condition;
FIG. 8 is a schematic view of a buckling restrained brace in a disassembled condition from an existing concrete beam;
FIG. 9 is a schematic diagram of a front view of the adapter assembly;
FIG. 10 is a schematic view of the cross-sectional structure taken along the line D-D in FIG. 9;
the figure shows:
110. Existing floor slabs, 111, reinforcing steel bars, 112, holes, 120, existing concrete beams, 121 and bolt holes;
200. The connecting device comprises a connecting device 210, a U-shaped steel plate 211, a transverse steel plate 212, a vertical steel plate 213, a through hole 220, a sealing bottom plate 230, a split bolt 240, an anchor bolt 250 and a node plate;
300. Buckling restrained brace;
400. the adapter plate comprises adapter assemblies 410, end plates 420, adapter plates 430, stiffening plates 421, horizontal planes 422 and vertical planes.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
Example 1
Referring to fig. 1 to 6, a connecting device 200 for connecting a buckling restrained brace and an existing concrete beam is provided according to an embodiment of the present invention, and includes a U-shaped steel plate 210, a split bolt 230, a back cover plate 220, an anchor bolt 240 and a gusset plate 250.
Referring to fig. 1 to 3 and 5 to 6, a plurality of U-shaped steel plates 210 are arranged along the length L direction of the existing concrete beam 120 and the existing floor slab 110 thereon; each of the U-shaped steel plates 210 includes a transverse steel plate 211, and two vertical steel plates 212 vertically connected downward along both ends of the transverse steel plate 211; the transverse steel plates 211 are arranged on the existing floor slab 110, the two vertical steel plates 212 extend downwards along two sides of the existing concrete beam 120 while avoiding the steel bars 111 of the existing floor slab 110 and penetrating through the existing floor slab 110, and the lower ends of the vertical steel plates 212 are flush with the lower surface of the existing concrete beam 120; i.e., the width between the vertical steel plates 212 is equal to the width W of the existing concrete beam 120.
Referring to fig. 1 to 2, the U-shaped steel plate 210 is fixed to the existing concrete beam 120 by means of the split bolts 230 penetrating the existing concrete beam 120. In order to increase the connection stability, the split bolts 230 may be plural, and the split bolts 230 may be distributed longitudinally along the existing concrete beam 120. In order to facilitate the fixing of the U-shaped steel plates 210 to the existing concrete beam 120, a through hole 213 through which the split bolt 230 passes may be provided in the vertical steel plate 212 of each of the U-shaped steel plates 210.
Referring to fig. 1 to 2 and 4, a bottom sealing plate 220 is disposed on the lower surface of the existing concrete beam 120, the bottom sealing plate 220 is welded with the vertical steel plates 212, the length of the bottom sealing plate 220 is greater than or equal to the distance between the first and the last U-shaped steel plates 210, and the width of the bottom sealing plate 220 is greater than or equal to the width W between two vertical steel plates 221 in each U-shaped steel plate 210. I.e., the back cover 220 may be a rectangular steel plate. Wherein the board 220 may be a single piece board or a splice of boards. To provide structural strength, and to enhance reliable connection to the buckling-restrained brace, the back plate 220 is preferably a one-piece plate. Of course, for example, two-block splicing can be used, and the smaller the number of splicing, the better.
Referring to fig. 2 and 4, an anchor bolt 240 is provided through the back cover plate 220 on the existing concrete beam 120 for reinforcing and fixing the back cover plate 220. The sole plate 220 may be provided with anchor holes for the anchor bolts 240 to pass through. The anchor bolts 240 may be chemical anchors, which are a plurality of chemical anchors distributed in a matrix. For example, the chemical anchors may be in the form of a rectangular array of 2 rows and more columns. When the chemical anchor bolts are anchored on the existing concrete beam 120, the chemical anchor bolts have little influence on the structural stability of the existing concrete beam 120 because of no expansion stress.
Referring to fig. 1-2 and 4, a gusset 250 is vertically disposed on the lower surface of the base plate 220. The gusset 250 may be disposed along the center of the back cover 220. To improve the connection strength, the node plates 250 may have a cross structure including a first plate disposed along the length direction of the existing concrete beam 120 and a second plate disposed along the width direction of the existing concrete beam 120, which are disposed in a cross. Of course, the node plate 250 may also have a straight structure and be vertically disposed at the vertical center of the back cover plate 220.
Referring to fig. 7 to 10, the connection device 200 for connecting a buckling restrained brace and an existing concrete beam 120 according to the present invention may further include a transfer assembly 400 and a buckling restrained brace 300.
Referring to fig. 7 to 10, the adapter assembly 400 includes an end plate 410, an adapter plate 420 vertically connected to the end plate 410, and a stiffening plate 430 disposed between the end plate 410 and the adapter plate 420. The stiffener plate 430 can provide stability to the placement of the interposer 420 on the endplate 410. The adapter plate 420 is a shaped plate, for example, the adapter plate 420 is a pentagonal plate, and at least includes a horizontal plane 421 connected to the bottom sealing plate 220 and a vertical plane 422 connected to the node plate 250. The end plate 410 may be reserved with a notch for welding the stiffening plate 430, the stiffening plate 430 is inserted into the notch for welding, and at this time, a groove may be reserved on the welding end surfaces of the stiffening plate 430 and the end plate 410, and the groove direction is upward, so as to avoid overhead welding.
Referring to fig. 7 and 8, buckling restrained brace 300 is mounted to the back plate 220 and gusset plate 250 by the adaptor assembly 400. Wherein buckling-restrained brace 300 may be a second-order yield buckling-restrained brace 300. Other buckling restrained braces known in the art are also possible. In the first embodiment of the present invention, the buckling restrained brace 300 is disposed obliquely, so that the adaptor assembly 400 is required to be connected with the bottom sealing plate 220 and the node plate 250.
Example two
An embodiment II of the present invention provides a construction method of a connection device 200 for a buckling restrained brace and an existing concrete beam connection node according to the above embodiment I, including:
In step 501, referring to fig. 3 and 5, the existing floor slab 110 is provided with the hole 112 by avoiding the reinforcing steel bar 111 of the existing floor slab 110 at the connection node of the existing concrete beam 120. Of course, prior to opening the opening 112, it may include measuring loft, locating the position of the existing floor slab 110 and the existing concrete beam 120 plane. Including measuring the location of the rebar 111 of the existing floor 110.
In step 502, referring to fig. 5, the existing concrete beam 120 is drilled with the construction bolt hole 121.
In step 503, referring to fig. 2, the U-shaped steel plate 210 is installed through the hole 112, so that the transverse steel plate 211 of the U-shaped steel plate 210 is placed on the existing floor slab 110, and the two vertical steel plates 212 extend downward along two sides of the existing concrete beam 120 through the hole 112. Wherein the U-shaped steel plate 210 may be a factory-customized standard component.
In step 504, referring to fig. 1to 2, the two vertical steel plates 212 of the U-shaped steel plate 210 are fixed to the existing concrete beam 120 by passing the split bolts 230 through the bolt holes 121.
In step 505, referring to fig. 1,2 and 4, after all the U-shaped steel plates 210 and the split bolts 230 thereon are installed, the bottom sealing plate 220 is installed on the lower surface of the existing concrete beam 120, and the bottom sealing plate 220 is welded with the vertical steel plates 212.
Referring to fig. 2 and 4, the floor 220 is secured to the existing concrete beam 120 by anchor bolts 240, step 506.
In step 507, referring to fig. 2 and 4, the node board 250 is mounted on the lower surface of the back cover 220, so that the node board 250 is welded on the back cover 220.
Example III
The third embodiment of the invention provides a method for connecting a buckling restrained brace with an existing concrete beam connection node, which comprises the following steps:
Referring to fig. 7 to 8, in step 601, the connection device 200 is constructed by the construction method of the connection device of the buckling restrained brace and the existing concrete beam connection node according to the second embodiment.
In step 602, please refer to fig. 7 and 8, the adaptor assembly 400 is mounted on the buckling-restrained brace 300.
In step 603, referring to fig. 7 and 8, the adaptor assembly 400 is welded to the bottom sealing plate 220 and the node plate 250 of the connection device 200.
Step 604 may perform a fire-proof and corrosion-proof process on the connection device 200 and the adapter assembly 400.
The connecting device 200 for connecting a buckling restrained brace and an existing concrete beam, the construction method thereof and the connecting method for connecting a buckling restrained brace and an existing concrete beam provided by the embodiment of the invention are characterized in that the existing concrete beam 120 is wrapped around by a U-shaped steel plate 210 penetrating through an existing floor slab 110 and a sealing bottom plate 220 positioned on the lower surface of the existing concrete beam 120, the U-shaped steel plate 210 is fixed on the existing concrete beam 120 by a split bolt 230, the sealing bottom plate 220 is reinforced and fixed on the existing concrete beam 120 by an anchor bolt 240, so that a relatively firm integral structure is formed between the U-shaped steel plate 210 and the sealing bottom plate 220 and the existing concrete beam 120, namely, the U-shaped steel plate 210 and the sealing bottom plate 220 form an annular hoop with the existing concrete beam 120, so as to jointly resist the axial force transmitted by the buckling restrained brace 300. Because buckling restrained brace 300 can be directly or through the switching subassembly 400 connection on back cover 220, then the axial force that buckling restrained brace 300 transmitted is born by back cover 220, U shaped steel board 210 and existing concrete beam 120 jointly, but not only born by existing concrete beam 120, then the joint point department can not cause the damage defect such as concrete fracture to existing concrete beam 120, can not lead to buckling restrained brace and existing concrete beam's connection to produce the phenomenon of becoming flexible, breaking away from mutually owing to the axial force transmission yet, consequently can improve buckling restrained brace and existing concrete beam's reliable connection.
According to the connecting device 200 for the buckling restrained brace and the existing concrete beam connecting node, the construction method of the connecting device and the connecting method for the buckling restrained brace and the existing concrete beam connecting node, provided by the embodiment of the invention, when the U-shaped steel plate 210 penetrates through the existing floor slab 110, the steel bars 111 of the existing floor slab 110 are prevented from being cut off, and the influence on the structural stability and the structural strength of the existing floor slab 110 is small. The split bolts 230 and the anchor bolts 240 have little influence on the structural strength and structural stability of the existing concrete beam 120, and cannot influence the safety performance of the existing floor slab 110 and the existing concrete beam 120, so that the effect of risk controllability is achieved.
The connecting device 200 of the buckling restrained brace and the existing concrete beam connecting node, the construction method of the connecting device and the connecting method of the buckling restrained brace and the existing concrete beam connecting node provided by the embodiment of the invention have the advantages of simple structure and convenience in installation compared with the construction modes of increasing the beam section, increasing the inter-column support and the like.
The connecting device 200 for the connection node between the buckling restrained brace and the existing concrete beam, the construction method thereof and the connecting method for the connection node between the buckling restrained brace and the existing concrete beam provided by the embodiment of the invention have the effects of hoop reinforcement on the existing concrete beam 120 by the U-shaped steel plate 210 and the back cover plate 220, stable connection on the U-shaped steel plate 210 and the back cover plate 220 by the split bolt 230 and the anchor bolt 240, simple construction process and reliable construction quality.
The connecting device 200 of the buckling restrained brace and the existing concrete beam connecting node and the construction method thereof and the connecting method of the buckling restrained brace and the existing concrete beam connecting node provided by the embodiment of the invention, the connecting device 200 is composed of the U-shaped steel plate 210, the back cover plate 220, the split bolt 230, the anchor bolt 240 and the node plate 250, in the reinforcing and reforming engineering of the existing building, the buckling restrained brace 300 consumes energy through self restrained buckling, and the earthquake force of the connecting node is reduced, so that the problem of reliable connection of the buckling restrained brace and the existing concrete beam can be solved on the premise of not increasing the cross section area of the existing concrete beam column, the purpose of shock absorption is achieved through the buckling restrained brace 300, and the earthquake force is resisted, so that the engineering cost is low.
The connecting device 200 of the buckling restrained brace and the existing concrete beam connecting node and the construction method thereof and the connecting method of the buckling restrained brace and the existing concrete beam connecting node provided by the embodiment of the invention are provided with more than two fingers; the plurality of matrix distribution means more than four; the number is more than three.
The present invention is not limited to the above-described embodiments, and various changes and modifications can be made within the scope of the present invention.
Claims (6)
1. The utility model provides a connecting device of buckling restrained brace and existing concrete beam connected node which characterized in that includes:
The U-shaped steel plates are arranged along the length direction of the existing concrete beam and the existing floor slab on the existing concrete beam; each U-shaped steel plate comprises a transverse steel plate and two vertical steel plates vertically connected downwards along two ends of the transverse steel plate; the transverse steel plates are arranged on the existing floor slab, the two vertical steel plates extend downwards along the two sides of the existing concrete beam while avoiding the steel bars of the existing floor slab, and the lower ends of the vertical steel plates are flush with the lower surface of the existing concrete beam;
The split bolts penetrate through the existing concrete beam to fix the U-shaped steel plate on the existing concrete beam;
The sealing bottom plate is arranged on the lower surface of the existing concrete beam, the sealing bottom plate is welded with the vertical steel plates, the length of the sealing bottom plate is larger than or equal to the distance between the U-shaped steel plates at the beginning and the end, and the width of the sealing bottom plate is larger than or equal to the width between two vertical steel plates in the U-shaped steel plates;
the anchor bolts penetrate through the bottom sealing plate and are arranged on the existing concrete beam in an anchoring manner;
The node plate is vertically arranged on the lower surface of the sealing bottom plate; the node plates comprise first plates which are arranged in a crisscross manner and are arranged along the length direction of the existing concrete beam, and second plates which are arranged along the width direction of the existing concrete beam;
The switching assembly comprises an end plate, an adapter plate vertically connected to the end plate and a stiffening plate arranged between the end plate and the adapter plate; the adapter plate comprises a horizontal plane connected with the bottom sealing plate and a vertical plane connected with the node plate;
and the buckling restrained brace is arranged on the sealing bottom plate and the node plate through the switching assembly.
2. The connection device of the buckling restrained brace and the existing concrete beam connection node according to claim 1, wherein a through hole for the split bolt to pass through is arranged on each vertical steel plate.
3. The connection device of the buckling restrained brace and the existing concrete beam connection node according to claim 1, wherein the split bolts are plural, and the split bolts are distributed longitudinally along the existing concrete beam.
4. The connection device of the buckling restrained brace and the existing concrete beam connection node according to claim 1, wherein the sealing bottom plate is a whole plate or a plurality of plates are spliced.
5. The connection device of the buckling restrained brace and the existing concrete beam connection node according to claim 1, wherein the anchor bolts are chemical anchor bolts, and the chemical anchor bolts are a plurality of chemical anchor bolts distributed in a matrix.
6. A method of constructing a connection arrangement for a buckling restrained brace as claimed in any of claims 1 to 5 to an existing concrete beam connection node, comprising:
Forming a hole on the existing floor slab by avoiding the steel bars of the existing floor slab on the connecting node of the existing concrete beam;
drilling construction bolt holes on the existing concrete beam;
installing a U-shaped steel plate through the hole, so that a transverse steel plate of the U-shaped steel plate is arranged on an existing floor slab, and two vertical steel plates extend downwards along two sides of an existing concrete beam through the hole;
two vertical steel plates of the U-shaped steel plate are fixed on the existing concrete beam through opposite-pull bolts penetrating through the bolt holes;
after all the U-shaped steel plates and the split bolts on the U-shaped steel plates are installed, installing a sealing bottom plate on the lower surface of the existing concrete beam, and welding the sealing bottom plate with the vertical steel plates;
Fixing the bottom sealing plate on the existing concrete beam through an anchor bolt;
mounting a node plate on the lower surface of the bottom sealing plate so that the node plate is welded on the bottom sealing plate;
Installing a switching assembly on the buckling restrained brace;
and welding the switching assembly on the bottom sealing plate and the node plate of the connecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213214.9A CN112376933B (en) | 2020-11-04 | 2020-11-04 | Connecting device and method for buckling restrained brace and existing concrete beam connecting node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213214.9A CN112376933B (en) | 2020-11-04 | 2020-11-04 | Connecting device and method for buckling restrained brace and existing concrete beam connecting node |
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| Publication Number | Publication Date |
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| CN112376933A CN112376933A (en) | 2021-02-19 |
| CN112376933B true CN112376933B (en) | 2024-08-23 |
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| CN202011213214.9A Active CN112376933B (en) | 2020-11-04 | 2020-11-04 | Connecting device and method for buckling restrained brace and existing concrete beam connecting node |
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| US6826874B2 (en) * | 1999-06-30 | 2004-12-07 | Nippon Steel Corporation | Buckling restrained braces and damping steel structures |
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| CN104563303A (en) * | 2015-01-13 | 2015-04-29 | 沈阳建筑大学 | Connecting joint for buckling-restrained brace and concrete frame beam |
| CN207160308U (en) * | 2017-04-19 | 2018-03-30 | 江苏建筑职业技术学院 | A kind of prefabrication structure with shock-absorbing function |
| CN208137145U (en) * | 2018-01-11 | 2018-11-23 | 山东大学 | The buckling-restrained unilateral connecting node of formula beam column built from concrete |
| CN209891757U (en) * | 2019-04-11 | 2020-01-03 | 北京城乡建设集团有限责任公司 | BRB buckling restrained brace antidetonation reinforced structure |
| CN210529993U (en) * | 2019-05-31 | 2020-05-15 | 中国建筑东北设计研究院有限公司 | A connected node that is used for bucking restraint of antidetonation reinforced (rfd) to support and concrete beam |
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2020
- 2020-11-04 CN CN202011213214.9A patent/CN112376933B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056234A (en) * | 2019-03-19 | 2019-07-26 | 上海大学 | A kind of buckling-restrained steel plate wall reinforces the connecting node of existing frame structure |
| CN214302987U (en) * | 2020-11-04 | 2021-09-28 | 上海市建工设计研究总院有限公司 | Connecting device for connecting joint of buckling restrained brace and existing concrete beam |
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