CN112227798A - Damping device for connecting joint of assembled concrete column and newly-added steel beam - Google Patents

Damping device for connecting joint of assembled concrete column and newly-added steel beam Download PDF

Info

Publication number
CN112227798A
CN112227798A CN202010980664.4A CN202010980664A CN112227798A CN 112227798 A CN112227798 A CN 112227798A CN 202010980664 A CN202010980664 A CN 202010980664A CN 112227798 A CN112227798 A CN 112227798A
Authority
CN
China
Prior art keywords
steel
steel beam
newly
damping device
shaped plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010980664.4A
Other languages
Chinese (zh)
Other versions
CN112227798B (en
Inventor
付亚男
闫磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Three Gorges University
Original Assignee
Chongqing Three Gorges University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Three Gorges University filed Critical Chongqing Three Gorges University
Priority to CN202010980664.4A priority Critical patent/CN112227798B/en
Publication of CN112227798A publication Critical patent/CN112227798A/en
Application granted granted Critical
Publication of CN112227798B publication Critical patent/CN112227798B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/027Preventive constructional measures against earthquake damage in existing buildings
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/185Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/025Structures with concrete columns

Abstract

The utility model provides an assembled concrete column and newly-increased girder steel connected node damping device, including steel-pipe column and girder steel, both sides all are equipped with the C template around the girder steel, the opening side of C template all deviates from the steel-pipe column, the opposite side of C template all with steel-pipe column fixed connection, all there are two L templates on every C template, the L template all is located the opposite face of two C templates, the girder steel is located between four L templates and passes through bolted connection with it respectively, both sides are equipped with two layering respectively around the girder steel, two layering of front side are passed through the scissors pole and are connected, two layering of rear side are connected through same scissors pole, equal fixed mounting one end open-ended sleeve in the C template, the sleeve slant sets up. This structure can strengthen the stability in the horizontal dimension, reduces because of the steel roof beam activity on a large scale and even the ground or the roof fracture problem that the damage caused, is favorable to further guaranteeing people's property, personal safety.

Description

Damping device for connecting joint of assembled concrete column and newly-added steel beam
Technical Field
The invention belongs to the field of building structural members, and particularly relates to a damping device for a connection node of an assembled concrete column and a newly-added steel beam.
Background
With the popularization and development of residential steel structures, the connection of the steel pipe concrete columns and horizontal members such as beams and plates forms an important structural system, and the steel pipe concrete columns have the characteristics of light dead weight, convenience in construction, large span and the like, have extremely good anti-seismic performance, and have high repairability even in Zhengzhou province. However, through research on analysis of node stress distribution rules, it is found that stress distribution at the joint of the steel beam and the concrete-filled steel tube column is concentrated, which easily causes yield strain of the steel beam flange and even causes sudden change at the web plate, and therefore, it is very necessary to further enhance the connection at the node.
Disclosure of Invention
The invention provides a damping device for a connection node of an assembled concrete column and a newly-added steel beam, which is used for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
a damping device for a connection node of an assembled concrete column and a newly-added steel beam comprises the steel pipe column and the steel beam, wherein C-shaped plates are arranged on the front side and the rear side of the steel beam, the opening sides of the C-shaped plates are deviated from the steel pipe column, the other sides of the C-shaped plates are fixedly connected with the steel pipe column, two L-shaped plates are arranged on each C-shaped plate, the L-shaped plates are arranged on the opposite surfaces of the two C-shaped plates, the steel beam is arranged between the four L-shaped plates and is respectively connected with the four L-shaped plates through bolts, two pressing strips are arranged on the front side and the rear side of the steel beam respectively, the two pressing strips on the front side are connected through a scissor rod, the two pressing strips on the rear side are connected through the same scissor rod, a sleeve with an opening at one end is fixedly arranged in each C-shaped plate, movable rods in sliding fit with the sleeve are respectively arranged in the sleeve, each sleeve is, the arc respectively with the periphery contact cooperation of the projection that corresponds, the communicating through groove in inside with it is all seted up to telescopic periphery, telescopic periphery all passes through wheel carrier installation gear, the tooth's socket with gear engagement is all seted up to the periphery of movable rod, the recess is seted up respectively to one of them terminal surface of gear, equal fixed mounting several wedge in the recess, telescopic periphery passes through the bearing frame installation pivot, the one end of pivot is located corresponding recess respectively and passes through the one end of torsional spring connection several shifting block, the other end of shifting block is corresponding wedge block respectively, the equal fixed connection one end of L type pole in periphery of pivot, L type pole and shifting block one-to-one, the other end of L type pole all with the contact cooperation of shifting block that corresponds, the equal fixed mounting line wheel of the other end of pivot, the equal fixed connection line rope's of periphery of line wheel one end, the other end of cotton rope all with the scissor pole fixed connection that corresponds.
According to the damping device for the connection node of the fabricated concrete column and the newly-added steel beam, the shear fork rod is formed by rotationally connecting two rods, a through hole is formed in one rod, and the other end of the thread rope penetrates through the corresponding through hole and then is fixedly connected with the other rod.
According to the damping device for the connection node of the assembled concrete column and the newly-added steel beam, the pressing strips are provided with the sliding grooves, the sliding blocks are movably mounted in the sliding grooves, and the end parts of the shearing fork rods are respectively and simultaneously hinged with the corresponding pressing strips and the corresponding sliding blocks.
According to the damping device for the connection node of the assembled concrete column and the newly-added steel beam, the plurality of rib plates are fixedly installed on the periphery of the convex column respectively and are fixedly connected with the steel beam.
According to the damping device for the connection node of the fabricated concrete column and the newly-added steel beam, the wire rope is a steel strand.
The invention has the advantages that: this device is when the girder steel atress especially follows its length direction's power, the girder steel has the motion trend, cooperation through arc and projection, absorb this motion and turn into the rotation of gear with it, when the movable rod removes to the sleeve, gear revolve can pass through the wedge, the shifting block drives the pivot and rotates, the pivot rotates and drives the line wheel rotation and draws in the cotton rope in, can enlarge the interval between two layering, layering and L template one-to-one, the layering can press from both sides the edge of a wing of tight girder steel with L template mutually supported, can promote its loaded ability, prevent that its atress from causing the bending etc. too greatly, and layering and L template have increased and the girder steel between the frictional force, thereby can greatly offset the power, can further restrain the removal of system girder steel, thereby can alleviate rocking of this node or adoption this node building. This structure can strengthen the stability in the horizontal dimension, reduces because of the steel roof beam activity on a large scale and even the ground or the roof fracture problem that the damage caused, is favorable to further guaranteeing people's property, personal safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of the view from the direction A of FIG. 1; FIG. 3 is an enlarged view of the view of FIG. 1 taken along line B; fig. 4 is an enlarged view of a sectional view taken along line C-C of fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A damping device for a connection node of an assembled concrete column and a newly-added steel beam comprises a steel pipe column 1 and a steel beam 2, wherein the steel beam 2 is H-shaped steel and is perpendicular to the steel pipe column 1, C-shaped plates 3 are arranged on the front side and the rear side of the steel beam 2, the opening sides of the C-shaped plates 3 are far away from the steel pipe column 1, the other sides of the C-shaped plates 3 are fixedly connected with the steel pipe column 1, two L-shaped plates 4 are arranged on each C-shaped plate 3, the two L-shaped plates 4 are distributed above and below, the L-shaped plates 4 are positioned on the opposite surfaces of the two C-shaped plates 3, the steel beam 2 is positioned between the four L-shaped plates 4 and is respectively connected with the L-shaped plates 4 through bolts, holes are respectively formed in the L-shaped plates 4 and the steel beam 2 and are connected through bolts, the beam flanges of the steel beam 2 are respectively contacted and matched with the C, the two pressing strips 5 on the front side are connected through a scissor rod 6, the two pressing strips 5 on the rear side are connected through the same scissor rod 6, a sleeve 7 with an opening at one end is fixedly installed in each C-shaped plate 3, the sleeve 7 is obliquely arranged, the other end of each sleeve 7 is fixedly connected with the corner of the inner wall of the corresponding C-shaped plate 3, a movable rod 8 in sliding fit with the sleeve 7 is arranged in each sleeve 7, each sleeve 7 is connected with the corresponding movable rod 8 through a spring 9, the two ends of each sleeve 7 are fixedly connected in a welding mode and the like, an arc-shaped plate 10 is fixedly installed at the outer end of each movable rod 8, the front surface and the rear surface of each steel beam 2 are fixedly connected with one end of a convex column 11, the two convex columns 11 are coaxially and longitudinally arranged, the arc-shaped plates 10 are respectively in contact fit with the peripheries of the corresponding convex columns 11, through grooves 12 communicated with the interiors of the peripheries of the sleeves 7 are formed in the peripheries of the sleeves, gears 13 are installed on, when the movable rod 8 inwards moves along the sleeve 7, the gear 13 can be driven to rotate, a groove 14 is respectively formed in one end face of the gear 13, the groove 14 is of a circular structure and shares the same central line with the gear 13, a plurality of wedge blocks 15 are fixedly installed in the groove 14, the wedge blocks 15 are uniformly distributed in the groove 14, a rotating shaft 16 is installed on the periphery of the sleeve 7 through a bearing seat, the rotating shaft 14 is longitudinally arranged, one end of the rotating shaft 16 is located in the corresponding groove 14 and connected with one end of a plurality of shifting blocks 17 through torsion springs, the other end of each shifting block 17 is clamped with the corresponding wedge block 15, one end of an L-shaped rod 18 is fixedly connected with the periphery of the rotating shaft 16, the L-shaped rods 18 correspond to the shifting blocks 17 one to one, the other end of the L-shaped rod 18 is in contact fit with the corresponding shifting blocks 17, a wire wheel 19 is fixedly installed at the other end of the rotating shaft 16, one end of a wire rope 20 is fixedly connected with. When the steel beam 2 is stressed, particularly the force in the length direction of the steel beam 2 is conformed, the steel beam 2 has the movement tendency, the motion mode is absorbed and converted into the rotation of the gear 13 through the matching of the arc-shaped plate 10 and the convex column 11, when the movable rod 8 moves towards the sleeve 7, the gear 13 rotates to drive the rotating shaft 16 to rotate through the wedge-shaped block 15 and the shifting block 17, the rotating shaft 16 rotates to drive the wire wheel 19 to rotate to draw in the wire rope 20, the space between the two pressing strips 5 can be enlarged, the pressing strips 5 correspond to the L-shaped plates 4 one by one, the pressing strips 5 and the L-shaped plates 4 are matched with each other to clamp the flange of the steel beam 2, the loading capacity of the steel beam can be improved, the steel beam is prevented from being bent due to overlarge stress, and the friction between the pressing strips 5 and the L-shaped plates 4 and the steel, thereby can greatly offset the vibration power, can further gram the removal of system girder steel 2 to can alleviate rocking of this node or adopting this node building. This structure can strengthen the stability in the horizontal dimension, reduces because of the ground or the roof fracture problem that girder steel 2 activity on a large scale even damage caused, is favorable to further guaranteeing people's property, personal safety.
Specifically, as shown in fig. 1, the scissors rod 6 of this embodiment is formed by two rods that are rotatably connected, the rotation connection mode is an articulated shaft, one end of the articulated shaft is fixedly connected to the corresponding C-shaped plate 3, the two rods can rotate around the articulated shaft, one of the rods is provided with a through hole, and the other end of the cord 20 is fixedly connected to the other rod after passing through the corresponding through hole. The through hole is not shown in the figure, when the wire wheel 19 rotates to draw the wire rope 20, the two rods can be close to each other, so that the distance between the two corresponding pressing strips 5 is enlarged.
Specifically, as shown in fig. 1, the pressing strips 5 according to this embodiment are provided with sliding grooves 21, sliding blocks 22 are movably mounted in the sliding grooves 21, and the ends of the scissor levers 6 are respectively and simultaneously hinged to the corresponding pressing strips 5 and the corresponding sliding blocks 22. This configuration can accommodate the horizontal displacement produced by the rotation of the two component bars of the scissors assembly 6.
Further, as shown in fig. 1 or 4, a plurality of rib plates 23 are respectively and fixedly installed on the outer periphery of the convex column 11, and the rib plates 23 are all fixedly connected with the steel beam 2. The structure can further strengthen the structural strength of the beam plate 2 and improve the load limit of the beam plate.
Further, the wire rope 20 according to the present embodiment is a steel strand. The diameter of the cable is 5-8 mm, the tensile property is good, the service life is long, and the cable is not easy to break.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (5)

1. The utility model provides an assembled concrete column and newly-increased girder steel connected node damping device, includes steel-pipe column (1) and girder steel (2), its characterized in that: the front side and the rear side of the steel beam (2) are respectively provided with a C-shaped plate (3), the opening side of each C-shaped plate (3) deviates from the steel pipe column (1), the other side of each C-shaped plate (3) is fixedly connected with the steel pipe column (1), each C-shaped plate (3) is provided with two L-shaped plates (4), each L-shaped plate (4) is positioned on the opposite surface of each C-shaped plate (3), the steel beam (2) is positioned between the four L-shaped plates (4) and is respectively connected with the four L-shaped plates through bolts, the front side and the rear side of the steel beam (2) are respectively provided with two pressing strips (5), the two pressing strips (5) on the front side are connected through a scissor rod (6), the two pressing strips (5) on the rear side are connected through the same scissor rod (6), a sleeve (7) with an opening at one end is fixedly arranged in each C-shaped plate (3), the sleeve (7), each sleeve (7) is connected with a corresponding movable rod (8) through a spring (9), an arc-shaped plate (10) is fixedly installed at the outer end of each movable rod (8), the front surface and the rear surface of each steel beam (2) are fixedly connected with one end of each convex column (11), the arc-shaped plates (10) are respectively in contact fit with the peripheries of the corresponding convex columns (11), through grooves (12) communicated with the inner parts of the sleeves (7) are formed in the peripheries of the sleeves (7), gears (13) are installed on the peripheries of the sleeves (7) through wheel carriers, tooth grooves meshed with the gears (13) are formed in the peripheries of the movable rods (8), grooves (14) are formed in one end face of each gear (13), a plurality of wedge blocks (15) are fixedly installed in the grooves (14), rotating shafts (16) are installed on the peripheries of the sleeves (7) through bearing seats, one ends of the rotating shafts (16) are respectively located in the corresponding grooves (14) and are connected with one ends of a plurality of, the other end of shifting block (17) is respectively corresponding to wedge (15) block, the one end of the equal fixed connection L type pole (18) of periphery of pivot (16), L type pole (18) and shifting block (17) one-to-one, the other end of L type pole (18) all with the shifting block (17) contact cooperation that corresponds, the equal fixed mounting line wheel (19) of the other end of pivot (16), the equal fixed connection line rope (20) of periphery of line wheel (19) one end, the other end of cotton rope (20) all with the scissors pole (6) fixed connection that corresponds.
2. The damping device for the connection joint of the fabricated concrete column and the newly-added steel beam according to claim 1, wherein: the scissors rod (6) is formed by rotationally connecting two rods, wherein one rod is provided with a through hole, and the other end of the thread rope (20) penetrates through the corresponding through hole and then is fixedly connected with the other rod.
3. The damping device for the connection node of the fabricated concrete column and the newly-added steel beam as claimed in claim 1 or 2, wherein: the pressing strip (5) is provided with a sliding groove (21), a sliding block (22) is movably mounted in the sliding groove (21), and the end part of the shearing fork rod (6) is hinged with the corresponding pressing strip (5) and the corresponding sliding block (22) respectively.
4. The damping device for the connection joint of the fabricated concrete column and the newly-added steel beam according to claim 1, wherein: the periphery of the convex column (11) is respectively and fixedly provided with a plurality of ribbed plates (23), and the ribbed plates (23) are fixedly connected with the steel beam (2).
5. The damping device for the connection joint of the fabricated concrete column and the newly-added steel beam according to claim 1, wherein: the wire rope (20) is a steel strand.
CN202010980664.4A 2020-09-17 2020-09-17 Damping device for connecting joint of assembled concrete column and newly-added steel beam Active CN112227798B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010980664.4A CN112227798B (en) 2020-09-17 2020-09-17 Damping device for connecting joint of assembled concrete column and newly-added steel beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010980664.4A CN112227798B (en) 2020-09-17 2020-09-17 Damping device for connecting joint of assembled concrete column and newly-added steel beam

Publications (2)

Publication Number Publication Date
CN112227798A true CN112227798A (en) 2021-01-15
CN112227798B CN112227798B (en) 2021-11-02

Family

ID=74107903

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010980664.4A Active CN112227798B (en) 2020-09-17 2020-09-17 Damping device for connecting joint of assembled concrete column and newly-added steel beam

Country Status (1)

Country Link
CN (1) CN112227798B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115288474A (en) * 2022-08-23 2022-11-04 江苏科技大学 Detachable beam column connection reinforcing and energy consumption device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1793587A (en) * 2005-12-28 2006-06-28 北京工业大学 Square section concrete short pillar hiden with 'slant strength nucleocenter beam' and mfg. method thereof
KR20140141834A (en) * 2013-05-31 2014-12-11 한양대학교 산학협력단 Vibration control damper device having three point support of toggle type
CN106836487A (en) * 2017-04-13 2017-06-13 北京市第三建筑工程有限公司 Full prefabricated PC concrete frame structure shock-resistant node
CN207582690U (en) * 2017-10-31 2018-07-06 中冶华天工程技术有限公司 connecting node
CN210887559U (en) * 2019-09-04 2020-06-30 中南大学 Low multi-storey steel structure residential system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1793587A (en) * 2005-12-28 2006-06-28 北京工业大学 Square section concrete short pillar hiden with 'slant strength nucleocenter beam' and mfg. method thereof
KR20140141834A (en) * 2013-05-31 2014-12-11 한양대학교 산학협력단 Vibration control damper device having three point support of toggle type
CN106836487A (en) * 2017-04-13 2017-06-13 北京市第三建筑工程有限公司 Full prefabricated PC concrete frame structure shock-resistant node
CN207582690U (en) * 2017-10-31 2018-07-06 中冶华天工程技术有限公司 connecting node
CN210887559U (en) * 2019-09-04 2020-06-30 中南大学 Low multi-storey steel structure residential system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115288474A (en) * 2022-08-23 2022-11-04 江苏科技大学 Detachable beam column connection reinforcing and energy consumption device
CN115288474B (en) * 2022-08-23 2023-11-21 江苏科技大学 Detachable beam column connection reinforcing and energy consumption device

Also Published As

Publication number Publication date
CN112227798B (en) 2021-11-02

Similar Documents

Publication Publication Date Title
CN112227798B (en) Damping device for connecting joint of assembled concrete column and newly-added steel beam
CN109837833B (en) Bridge vibration damper
CN111472262B (en) Steel structure bridge truss with buffering characteristic
CN108181935B (en) Single-shaft solar tracker
EP3450748B1 (en) Connecting structure for steel tube truss and tower barrel of lattice wind power generation tower
CN113202186B (en) Steel construction antidetonation frame construction and steel construction assembled earthquake-resistant building
CN115162526B (en) Main body structure of assembled steel structure building
CN215104639U (en) Large-displacement assembled composite noise reduction modular expansion device for highway bridge
CN210659456U (en) Special hoisting device of stereo garage
CN214834036U (en) Novel truss string structure of short vaulting pole formula based on steel construction
CN102191930A (en) Composite balanced flexible oil pumping unit with long service life
CN212656538U (en) Assembly type building template framework system
CN210855029U (en) Steel box girder component construction vehicle for high-altitude transportation and hoisting operation
CN211873349U (en) Steel structure connecting structure
CN210976786U (en) Avoidance-free stereo garage
CN112502278A (en) A assembled connected node for large-span
CN106586858B (en) A kind of maritime platform large-sized steel drag chain system performance test traction device
CN202953655U (en) Guide rail support
CN215759594U (en) Steel house assembling connecting part
CN216615512U (en) Movable construction platform for installing water falling pipe of viaduct
CN215802671U (en) Steel structure combination beam for increasing bearing capacity of existing steel beam
CN216973086U (en) Bridge reinforcing connecting piece
CN220787679U (en) Bridge pulley block
CN220156461U (en) Flexible cable photovoltaic tracking bracket
CN213508088U (en) Variable cross-section steel box girder die carrier

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant