CN112376933A - Connecting device and method for connecting buckling restrained brace and existing concrete beam connecting node - Google Patents
Connecting device and method for connecting buckling restrained brace and existing concrete beam connecting node Download PDFInfo
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- CN112376933A CN112376933A CN202011213214.9A CN202011213214A CN112376933A CN 112376933 A CN112376933 A CN 112376933A CN 202011213214 A CN202011213214 A CN 202011213214A CN 112376933 A CN112376933 A CN 112376933A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims description 23
- 238000003466 welding Methods 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003351 stiffener Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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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Abstract
The invention discloses a connecting device and a connecting method for a connecting node of a buckling restrained brace and an existing concrete beam, wherein the connecting 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 U-shaped steel plate is fixed on the existing concrete beam through a split bolt; the sealing bottom plate is arranged on the lower surface of the existing concrete beam and welded with the U-shaped steel plate; the anchoring bolt anchors the sealing bottom plate on the existing concrete beam; and the gusset 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 project of reinforcing and transforming the upper structure of the existing building, the traditional method is to use the added supports between the common columns to consume energy and resist earthquake force by increasing the column section, the beam section or the common columns. The construction method has the disadvantages that when the area of the cross section of the beam or the column is increased greatly, the use function of the building is influenced, the construction cost is higher, the damage of the connecting node of the common support and the original concrete member to the original structure is larger, and the construction difficulty is large. In the prior art, the buckling restrained brace is connected to an 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 connection node, and when the yielding buckling restrained brace is vibrated by axial force, the buckling restrained brace is easily loosened and even separated 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 a buckling restrained brace and an existing concrete beam connecting node so as to improve the reliable connection between the buckling restrained brace and the buckling restrained brace.
In order to solve the technical problem, the invention provides a technical scheme that: a connecting device of buckling restrained brace and existing concrete beam connected node 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 which are 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 avoid the reinforcing steel bars of the existing floor slab from penetrating through the existing floor slab and extend downwards along the two sides of the existing concrete beam, 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 and welded with the vertical steel plates, the length of the sealing bottom plate is greater 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 greater than or equal to the width between two vertical steel plates in the U-shaped steel plates;
the anchoring bolt penetrates through the sealing bottom plate and is arranged on the existing concrete beam in an anchoring mode;
and the gusset 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 adapter 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 installed on the sealing bottom plate and the gusset plate through the adapter assembly.
Furthermore, the connecting device for the buckling restrained brace and the existing concrete beam connecting node provided by the invention comprises an adapter plate, wherein the adapter plate comprises a horizontal plane connected with the sealing bottom plate and a vertical plane connected with the node plate.
Furthermore, according to the connecting device of the buckling restrained brace and the existing concrete beam connecting node, each vertical steel plate is provided with a through hole for the split bolt to pass through.
Furthermore, the connecting device for the buckling restrained brace and the existing concrete beam connecting node is provided with a plurality of split bolts, and the split bolts are distributed along the longitudinal direction of the existing concrete beam.
Further, according to the connecting device of the buckling restrained brace and the existing concrete beam connecting node, the sealing bottom plate is formed by splicing a whole plate or a plurality of plates.
Furthermore, according to the connecting device of the buckling restrained brace and the existing concrete beam connecting node, the anchoring bolts are chemical anchor bolts, and the chemical anchor bolts are distributed in a matrix manner.
Furthermore, the invention provides a connecting device for connecting a buckling restrained brace and an existing concrete beam, wherein the node plate comprises a first plate and a second plate, the first plate is arranged in a crisscross mode and arranged along the length direction of the existing concrete beam, and the second plate is arranged in the width direction of the existing concrete beam.
In order to solve the above technical problems, another technical solution provided by the present invention is: a construction method of the connecting device of the buckling restrained brace and the existing concrete beam connecting node comprises the following steps:
opening holes on the existing floor slab by avoiding the steel bars of the existing floor slab on the connecting nodes of the existing concrete beam;
drilling a construction bolt hole on the existing concrete beam;
installing U-shaped steel plates through the openings so that the transverse steel plates of the U-shaped steel plates are arranged on the existing floor slab, and the two vertical steel plates extend downwards along the two sides of the existing concrete beam through the openings;
two vertical steel plates of the U-shaped steel plate are fixed on the existing concrete beam by a split bolt penetrating through a bolt hole;
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 sealing bottom plate on the existing concrete beam through an anchoring bolt;
and installing 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 above technical problem, another technical solution provided by the present invention is: a method for connecting a buckling restrained brace and a connecting node of an existing concrete beam,
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;
mounting a switching assembly on the buckling restrained brace;
and welding the switching assembly on a sealing bottom plate and a node plate of the connecting device.
Compared with the prior art, the invention has the following beneficial effects:
according to the connecting device and the method for the connecting node of the buckling restrained brace and the existing concrete beam, the existing concrete beam is wrapped in a surrounding mode through 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 fixed on the existing concrete beam in a reinforcing mode through the anchoring bolts, and therefore the U-shaped steel plate, the sealing bottom plate and the existing concrete beam form a relatively firm integral structure to jointly resist axial force transmitted by the buckling restrained brace. Because the buckling restrained brace can be directly connected to the sealing bottom plate or connected to the sealing bottom plate through the adapter assembly, the axial force transmitted by the buckling restrained brace is jointly borne by the sealing bottom plate, the U-shaped steel plate and the existing concrete beam instead of only the existing concrete beam, so that the existing concrete beam is not damaged due to concrete fracture and the like at the connecting node, and the buckling restrained brace is not loosened and separated from the existing concrete beam due to the transmission of the axial force, so that the reliable connection between the buckling restrained brace and the existing concrete beam can be improved.
According to the connecting device and the connecting method for the buckling restrained brace and the existing concrete beam connecting node, when the U-shaped steel plate penetrates through the existing floor slab, the reinforcing steel bars of the existing floor slab are avoided, the reinforcing steel bars are not cut off, and the influence on the structural stability and the structural strength of the existing floor slab is small. The influence of the tension bolts and the anchor bolts on the structural strength and the structural stability of the existing concrete beam is small, the influence on the safety performance of the existing floor slab and the existing concrete beam is avoided, and therefore the effect that the risk is controllable is achieved.
Compared with construction modes such as enlarging the beam section, increasing the inter-column support and the like, the connecting device and the connecting method for the buckling restrained brace and the existing concrete beam connecting node have the advantages of simple structure and convenience in installation.
According to the connecting device and the connecting 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 hoop reinforcement role in the existing concrete beam, the U-shaped steel plate and the sealing bottom plate are firmly connected through the pull bolt, and the connecting device and the connecting method have the effects of being simple in construction process and reliable in construction quality.
The connecting device for the buckling restrained brace and the existing concrete beam connecting node comprises a U-shaped steel plate, a sealing bottom plate, a split bolt, an anchoring bolt and a node plate, and can solve the problem of reliable connection of the buckling restrained brace and the existing concrete beam in the existing building reinforcing and reforming project, so that the purpose of shock absorption is achieved through the buckling restrained brace to resist earthquake force, and the project cost is low.
Drawings
FIG. 1 is a schematic diagram of a connection device 200;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 1;
fig. 5 is a schematic 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 structural view of a buckling restrained brace in an installed state on an existing concrete beam;
FIG. 8 is a schematic structural view of the buckling restrained brace in a disassembled state from an existing concrete beam;
FIG. 9 is a front view of the adapter assembly;
FIG. 10 is a schematic cross-sectional view taken along line D-D of FIG. 9;
shown in the figure:
110. the method comprises the following steps of (1) forming an existing floor slab, 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 anchoring bolt 250 and a gusset plate;
300. buckling restrained brace;
400. adapter assembly, 410, end plate, 420, adapter plate, 430, stiffener, 421, horizontal plane, 422, vertical plane.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
example one
Referring to fig. 1 to 6, an embodiment of the present invention provides a connecting device 200 for a buckling restrained brace and an existing concrete beam connecting node, including a U-shaped steel plate 210, a split bolt 230, a back cover plate 220, an anchor bolt 240, and a node plate 250.
Referring to fig. 1 to 3 and 5 to 6, a plurality of U-shaped steel plates 210 are disposed along a length L direction of an existing concrete beam 120 and an 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 slabs 110, the two vertical steel plates 212 avoid the reinforcing steel bars 111 of the existing floor slabs 110 to penetrate through the existing floor slabs 110 and extend downwards along the two sides of the existing concrete beams 120, and the lower ends of the vertical steel plates 212 are flush with the lower surfaces of the existing concrete beams 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 the counter bolts 230 penetrating the existing concrete beam 120. In order to increase the stability of the connection, the tie bolt 230 may be provided in plurality, and a plurality of the tie bolts 230 are longitudinally distributed along the existing concrete beam 120. In order to fix the U-shaped steel plates 210 to the existing concrete beam 120, a through hole 213 through which the counter bolt 230 passes may be formed in the vertical steel plate 212 of each of the U-shaped steel plates 210.
Referring to fig. 1 to 2 and 4, a back cover plate 220 is disposed on a lower surface of an existing concrete beam 120, the back cover plate 220 is welded to the vertical steel plates 212, a length of the back cover plate 220 is greater than or equal to a distance between the U-shaped steel plates 210 at the beginning and end, and a width of the back cover plate 220 is greater than or equal to a width W between two vertical steel plates 221 in each U-shaped steel plate 210. That is, the back cover plate 220 may be a rectangular steel plate. Wherein the back cover plate 220 can be a single plate or a plurality of plates. To provide structural strength and to improve a reliable connection with the buckling restrained brace, the back cover plate 220 is preferably a unitary plate. It is of course also possible to use, for example, two-piece splices, the fewer the number of splices the better.
Referring to fig. 2 and 4, anchor bolts 240 are provided through the back cover plate 220 on the existing concrete beam 120 for reinforcing and fixing the back cover plate 220. The bottom sealing plate 220 may be provided with an anchor hole through which the anchor bolt 240 passes. The anchor bolt 240 may be a chemical anchor which is 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 columns. When the chemical anchor bolt anchors the existing concrete beam 120, since it has no expansive stress, it has less influence on the structural stability of the existing concrete beam 120.
Referring to fig. 1 to 2 and 4, a node plate 250 is vertically disposed on a lower surface of the bottom sealing plate 220. The gusset plate 250 may be disposed along the center of the back cover plate 220. In order to improve the coupling strength, the node plate 250 may have a crisscross structure including a first plate arranged in a crisscross manner along the length direction of the existing concrete beam 120 and a second plate arranged in a width direction of the existing concrete beam 120. Of course, the gusset plate 250 may also be a straight structure, vertically disposed at the vertical center of the back cover plate 220.
Referring to fig. 7 to 10, the connecting device 200 for connecting a buckling-restrained brace to an existing concrete beam 120 according to the present invention may further include a transit assembly 400 and a buckling-restrained brace 300.
Referring to fig. 7 to 10, the adaptor assembly 400 includes an end plate 410, an adaptor plate 420 vertically connected to the end plate 410, and a stiffener plate 430 disposed between the end plate 410 and the adaptor plate 420. The stiffener plate 430 can provide stability for the interposer 420 to be placed on the end plate 410. The adaptor plate 420 is a shaped plate, for example, the adaptor plate 420 is a pentagonal plate, and at least includes a horizontal surface 421 connected to the sealing bottom plate 220 and a vertical surface 422 connected to the node plate 250. A notch for welding the stiffening plate 430 may be reserved on the end plate 410, the stiffening plate 430 is inserted into the notch for welding, and a groove may be reserved on the welding end surface of the stiffening plate 430 and the end plate 410, and the groove is upward, so as to avoid overhead welding.
Referring to fig. 7 and 8, a buckling-restrained brace 300 is mounted on the back cover plate 220 and the gusset plate 250 via the adapter assembly 400. Wherein buckling-restrained brace 300 may be a second-order yield buckling-restrained brace 300. Other buckling restrained braces of the known art are also possible. In the first embodiment of the present invention, the buckling-restrained brace 300 is disposed in an inclined manner, so that the adapter assembly 400 is required to be connected to the back cover plate 220 and the node plate 250.
Example two
The second embodiment of the present invention provides a construction method for a connection device 200 for a connection node between a buckling-restrained brace and an existing concrete beam according to the first embodiment, including:
step 501, please refer to fig. 3 and 5, opening a hole 112 in the existing floor slab 110 on the connecting node of the existing concrete beam 120, avoiding the steel bar 111 of the existing floor slab 110. Of course, before opening the opening 112, the steps of setting out a sample, and positioning the plane of the existing floor slab 110 and the existing concrete beam 120 may be included. And includes measuring the location of the existing floor 110 rebar 111.
In step 502, referring to fig. 5, a construction bolt hole 121 is drilled in the existing concrete beam 120.
Referring to fig. 2, in step 503, the U-shaped steel plate 210 is installed through the opening 112, such that the horizontal steel plate 211 of the U-shaped steel plate 210 is placed on the existing floor 110, and the two vertical steel plates 212 extend downward along two sides of the existing concrete beam 120 through the opening 112. Wherein the U-shaped steel plate 210 may be a standard component customized for factory use.
In step 504, referring to fig. 1 to 2, the two vertical steel plates 212 of the U-shaped steel plate 210 are fixed to the existing concrete beam 120 by the tie bolts 230 passing through the bolt holes 121.
Step 505, referring to fig. 1, fig. 2 and fig. 4, after all the U-shaped steel plates 210 and the tie bolts 230 thereon are installed, installing the bottom sealing plate 220 on the lower surface of the existing concrete beam 120, and welding the bottom sealing plate 220 and the vertical steel plates 212.
Referring to fig. 2 and 4, the back cover plate 220 is fixed to the existing concrete beam 120 by the anchor bolts 240, step 506.
In step 507, referring to fig. 2 and 4, a node plate 250 is mounted on the lower surface of the bottom sealing plate 220, so that the node plate 250 is welded to the bottom sealing plate 220.
EXAMPLE III
The third embodiment of the invention provides a connection method of a buckling restrained brace and an existing concrete beam connection node, which comprises the following steps:
step 601, please refer to fig. 7 to 8, in which the connecting device 200 is constructed according to the construction method of the connecting device of the buckling restrained brace and the existing concrete beam connecting node of the second embodiment.
In step 602, please refer to fig. 7 and 8, the adaptor assembly 400 is installed on the buckling-restrained brace 300.
Referring to fig. 7 and 8, in step 603, the adapter module 400 is welded to the bottom sealing plate 220 and the node plate 250 of the connecting device 200.
At step 604, the connector 200 and the adapter module 400 may be subjected to a fire-resistant and corrosion-resistant treatment.
The connection device 200 for the buckling restrained brace and the existing concrete beam connection node, the construction method thereof and the connection method for the buckling restrained brace and the existing concrete beam connection node provided by the above embodiments of the present invention surround and wrap the existing concrete beam 120 through the U-shaped steel plate 210 penetrating through the existing floor 110 and the back cover plate 220 located on the lower surface of the existing concrete beam 120, fix the U-shaped steel plate 210 on the existing concrete beam 120 through the tension bolts 230, and reinforce and fix the back cover plate 220 on the existing concrete beam 120 through the anchor bolts 240, so that the U-shaped steel plate 210, the back cover plate 220 and the existing concrete beam 120 form a relatively firm integral structure, that is, the U-shaped steel plate 210, the back cover plate 220 and the existing concrete beam 120 form an annular hoop to commonly resist the axial force transmitted by the buckling restrained brace 300. Because the buckling restrained brace 300 can be connected to the sealing bottom plate 220 directly or through the adapter assembly 400, the axial force transmitted by the buckling restrained brace 300 is jointly borne by the sealing bottom plate 220, the U-shaped steel plate 210 and the existing concrete beam 120, but not only by the existing concrete beam 120, so that the defects of concrete breakage and the like at the connecting node can be avoided for the existing concrete beam 120, and the phenomena of looseness and separation of the connection between the buckling restrained brace and the existing concrete beam caused by the transmission of the axial force can be avoided, so that the reliable connection between the buckling restrained brace and the existing concrete beam can be improved.
According to the connecting device 200 for the connecting node of the buckling restrained brace and the existing concrete beam, the construction method thereof and the connecting method for the connecting node of the buckling restrained brace and the existing concrete beam provided by the embodiment of the invention, when the U-shaped steel plate 210 penetrates through the existing floor slab 110, the reinforcing steel bars 111 of the existing floor slab 110 are avoided, the reinforcing steel bars 111 are not cut off, and the influence on the structural stability and the structural strength of the existing floor slab 110 is small. The tension bolts 230 and the anchor bolts 240 have a small influence on the structural strength and the structural stability of the existing concrete beam 120, and do not have an influence on the safety performance of the existing floor slab 110 and the existing concrete beam 120, thereby having an effect of controlling the risk.
The connecting device 200 for the buckling restrained brace and the existing concrete beam connecting node, the construction method thereof and the connecting method for 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 construction modes such as increasing the beam section and increasing the inter-column bracing.
According to the connecting device 200 for the connecting node of the buckling restrained brace and the existing concrete beam and the construction method thereof as well as the connecting method for the connecting node of the buckling restrained brace and the existing concrete beam, which are provided by the embodiment of the invention, the U-shaped steel plate 210 and the sealing bottom plate 220 play a hoop reinforcement role in the existing concrete beam 120, and the pull bolt 230 plays a role in stably connecting the U-shaped steel plate 210 and the anchor bolt 240 to the sealing bottom plate 220, so that the connecting device has the effects of simple construction process and reliable construction quality.
The connection device 200 of the buckling restrained brace and the existing concrete beam connection node and the construction method thereof and the connection method of the buckling restrained brace and the existing concrete beam connection node provided by the embodiment of the invention are characterized in that the connection device 200 consists 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, and in the existing building reinforcing and reforming engineering, the buckling restrained brace 300 consumes energy through self-restrained buckling and reduces the seismic force of the connection node, 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-sectional area of the existing concrete beam column, the purpose of shock absorption is achieved through the buckling restrained brace 300, the seismic force is resisted, and the engineering cost is low.
The connecting device 200 for the buckling restrained brace and the existing concrete beam connecting node and the construction method thereof and the connecting method for the buckling restrained brace and the existing concrete beam connecting node provided by the embodiment of the invention have more than two fingers; the plurality of matrix distribution means more than four; several means more than three.
The present invention is not limited to the above-described embodiments, and various changes and modifications within the scope of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a buckling restrained brace and existing concrete beam connected node's connecting device 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 which are 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 avoid the reinforcing steel bars of the existing floor slab from penetrating through the existing floor slab and extend downwards along the two sides of the existing concrete beam, 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 and welded with the vertical steel plates, the length of the sealing bottom plate is greater 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 greater than or equal to the width between two vertical steel plates in the U-shaped steel plates;
the anchoring bolt penetrates through the sealing bottom plate and is arranged on the existing concrete beam in an anchoring mode;
and the gusset plate is vertically arranged on the lower surface of the sealing bottom plate.
2. The connection of a buckling-restrained brace to an existing concrete beam connection node as claimed in claim 1, further comprising:
the adapter 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 installed on the sealing bottom plate and the gusset plate through the adapter assembly.
3. The buckling-restrained brace and existing concrete beam connection node connection arrangement of claim 2, wherein the adapter plate includes a horizontal surface connected with the back cover plate and a vertical surface connected with the node plate.
4. The buckling-restrained brace and existing concrete beam connection node connection device of claim 1, wherein each vertical steel plate is provided with a through hole for the split bolt to pass through.
5. The buckling-restrained brace and existing concrete beam connection node connection device of claim 1, wherein the tie bolt is a plurality of, and a plurality of the tie bolts are distributed along the existing concrete beam in a longitudinal direction.
6. The buckling-restrained brace and existing concrete beam connection node connection arrangement of claim 1, wherein the back cover plate is a one-piece plate or a multi-piece plate.
7. The connection device of a buckling-restrained brace to an existing concrete beam connection node according to claim 1, wherein the anchor bolt is a chemical anchor bolt which is a plurality of chemical anchor bolts distributed in a matrix.
8. A buckling restrained brace connection node to an existing concrete beam as claimed in claim 1, said node plates including a first plate disposed in a criss-cross arrangement along the length of the existing concrete beam and a second plate disposed along the width of the existing concrete beam.
9. A method of constructing a connection of a buckling restrained brace to an existing concrete beam connection node according to any one of claims 1 to 8, comprising:
opening holes on the existing floor slab by avoiding the steel bars of the existing floor slab on the connecting nodes of the existing concrete beam;
drilling a construction bolt hole on the existing concrete beam;
installing U-shaped steel plates through the openings so that the transverse steel plates of the U-shaped steel plates are arranged on the existing floor slab, and the two vertical steel plates extend downwards along the two sides of the existing concrete beam through the openings;
two vertical steel plates of the U-shaped steel plate are fixed on the existing concrete beam by a split bolt penetrating through a bolt hole;
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 sealing bottom plate on the existing concrete beam through an anchoring bolt;
and installing a node plate on the lower surface of the back cover plate so that the node plate is welded on the back cover plate.
10. A method for connecting a buckling restrained brace and an existing concrete beam connecting node is characterized in that,
a construction method of a connection device of a buckling restrained brace and an existing concrete beam connection node according to claim 9, constructing the connection device;
mounting a switching assembly on the buckling restrained brace;
and welding the switching assembly on a sealing bottom plate and a node plate of the connecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213214.9A CN112376933A (en) | 2020-11-04 | 2020-11-04 | Connecting device and method for connecting buckling restrained brace and existing concrete beam connecting node |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011213214.9A CN112376933A (en) | 2020-11-04 | 2020-11-04 | Connecting device and method for connecting buckling restrained brace and existing concrete beam connecting node |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010000840A1 (en) * | 1999-06-30 | 2001-05-10 | Toru Takeuchi | Buckling restrained braces and damping steel structures |
| 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 |
| 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 |
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| 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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