CN219952254U - Steel beam and concrete column connecting node - Google Patents

Steel beam and concrete column connecting node Download PDF

Info

Publication number
CN219952254U
CN219952254U CN202320974490.XU CN202320974490U CN219952254U CN 219952254 U CN219952254 U CN 219952254U CN 202320974490 U CN202320974490 U CN 202320974490U CN 219952254 U CN219952254 U CN 219952254U
Authority
CN
China
Prior art keywords
steel beam
concrete column
steel
adapter
fixedly connected
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.)
Active
Application number
CN202320974490.XU
Other languages
Chinese (zh)
Inventor
李军
刘波
徐风波
曹志贵
徐艳苗
杨志勇
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.)
China Construction Science And Industry Co ltd
Original Assignee
China Construction Science And Industry Co ltd
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 China Construction Science And Industry Co ltd filed Critical China Construction Science And Industry Co ltd
Priority to CN202320974490.XU priority Critical patent/CN219952254U/en
Priority to DE202023104530.8U priority patent/DE202023104530U1/en
Application granted granted Critical
Publication of CN219952254U publication Critical patent/CN219952254U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The utility model relates to the technical field of building structures, in particular to a connecting node of a steel beam and a concrete column. The girder steel and concrete column connected node includes: the steel beam is transversely arranged; the concrete column is longitudinally arranged, the bottom end of the concrete column in the longitudinal direction is contacted with the upper surface of the steel beam, and longitudinal ribs are arranged in the concrete column; the adaptor is provided with a main plane extending along the longitudinal direction, at least part of the main plane is overlapped with the projection of the longitudinal ribs and fixedly connected with the projection of the longitudinal ribs, and the adaptor is fixedly connected with the upper surface of the steel beam along the longitudinal bottom surface and the longitudinal ribs at the same time. According to the connecting node of the steel beam and the concrete column, the steel beam and the longitudinal ribs are fixedly connected through the adapter, so that the steel beam and the concrete column with the longitudinal ribs arranged inside form fixed connection, and the lower steel beam and the upper concrete column are reliably connected and reliably transmit axial force, shearing force and bending moment.

Description

Steel beam and concrete column connecting node
Technical Field
The utility model relates to the technical field of building structures, in particular to a connecting node of a steel beam and a concrete column.
Background
With rapid development of construction engineering, construction technology is rapidly improved, and common building structure systems can be divided into reinforced concrete structures, steel-concrete combined structures and steel structures. The steel-concrete combined structure is an integral structure formed by combining steel members and concrete or reinforced concrete members, has the characteristics and advantages of a steel structure and a reinforced concrete structure, and is gradually a building structure type widely adopted in the field of building engineering. The connection node under the general condition adopts reinforced concrete structure for the lower part main part, and upper portion adopts steel construction, and upper steel construction accessible built-in fitting is connected with lower part reinforced concrete beam slab component. However, this connection node cannot be applied to the case where the lower body is made of a steel structure and the upper body is made of a reinforced concrete structure, and thus a connection node capable of reliably connecting the lower steel structure and the upper reinforced concrete structure and transmitting an axial force, a shearing force, and a bending moment is required.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the defect that the joint of the upper steel structure and the lower reinforced concrete beam slab component through the embedded part in the prior art cannot be reversely applied to the situation that the lower part is the steel structure and the upper part is the reinforced concrete structure, so as to provide the joint of the steel beam and the concrete column, which can reliably connect the lower part is the steel structure and the upper part is the reinforced concrete structure and transmit axial force, shearing force and bending moment.
In order to solve the technical problems, the utility model provides a connecting node of a steel beam and a concrete column, which comprises the following components:
the steel beam is transversely arranged;
the concrete column is longitudinally arranged, the bottom end of the concrete column in the longitudinal direction is contacted with the upper surface of the steel beam, and longitudinal ribs are arranged in the concrete column;
the adaptor is provided with a main plane extending along the longitudinal direction, at least part of the main plane is overlapped with the projection of the longitudinal ribs and fixedly connected with the projection of the longitudinal ribs, and the adaptor is fixedly connected with the upper surface of the steel beam along the longitudinal bottom surface and the longitudinal ribs at the same time.
Optionally, the adapter comprises angle steel, two principal planes of angle steel simultaneously with indulge muscle fixed connection.
Optionally, the axis of the longitudinal rib is parallel to the ridge line of the angle steel, and the longitudinal rib is arranged on the inner side of the intersection of the two main planes of the angle steel, so that the longitudinal rib is fixedly connected with the two main planes of the angle steel at the same time.
Optionally, the quantity of angle steel is greater than one, every the angle steel all with one indulge muscle fixed connection, a plurality of the angle steel distributes in girder steel top flange plane.
Optionally, the adaptor is fixedly connected with the steel beam through the bottom surface perpendicular to the ridge line.
Optionally, the fixed connection form of the adaptor and the steel beam comprises welding or bolting; the connection mode of the longitudinal ribs and the adapter piece comprises welding or bolting.
Optionally, a stirrup is arranged on the outer side of the adapter, and the stirrup is fixedly connected with the adapter.
Optionally, the axis of the stirrup is perpendicular to the ridge line of the adapter.
Optionally, a vertical stiffening rib is arranged on the inner side of the steel beam.
Optionally, the vertical stiffening rib is perpendicular to the girder steel web, for the adaptor with the tie point of girder steel sets up in the girder steel is inboard.
The technical scheme of the utility model has the following advantages:
1. according to the connecting node of the steel beam and the concrete column, the steel beam and the longitudinal ribs are fixedly connected through the adapter, so that the steel beam and the concrete column with the longitudinal ribs arranged inside form fixed connection, and the lower steel beam and the upper concrete column are reliably connected and reliably transmit axial force, shearing force and bending moment.
2. The connecting node of the steel girder and the concrete column provided by the utility model has the advantages that the longitudinal ribs are arranged on the inner side of the intersection of the two main planes of the adapter and are fixedly connected with the two main planes of the adapter, so that the reliability of the connection of the adapter and the longitudinal ribs is improved, and the steel girder and the longitudinal ribs are reliably connected and transmit axial force, shearing force and bending moment.
3. According to the connecting joint of the steel beam and the concrete column, the stirrups are arranged on the outer side of the adapter, and the shearing resistance of the adapter is improved through the stirrups.
4. The connecting joint of the steel beam and the concrete column is provided with the vertical stiffening rib between the upper flange and the lower flange of the steel beam and corresponding to the position of the fixed connecting point of the upper surface of the upper flange and the adapter, so that the concentrated load at the connecting point of the steel beam and the adapter is avoided, the local instability of the steel beam is avoided, and the stability of the steel beam of the lower main body is enhanced
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a top view of a steel beam and concrete column connection node of the present utility model;
FIG. 2 is a schematic cross-sectional view at A-A of FIG. 1;
fig. 3 is a schematic cross-sectional view at B-B in fig. 2.
Reference numerals illustrate:
the steel beam comprises a steel beam body, a 2-adaptor, 3-longitudinal ribs, 4-concrete columns, 5-steel beam webs, 6-vertical stiffening ribs and 7-stirrups.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Example 1
1-3, the steel beam and concrete column connecting node provided in this embodiment includes:
the steel beam 1 is arranged along the transverse direction;
the concrete column 4 is arranged along the longitudinal direction, the bottom end of the concrete column 4 along the longitudinal direction is contacted with the upper surface of the steel beam 1, and longitudinal ribs 3 are arranged inside the concrete column 4;
the adaptor 2 is provided with a main plane extending along the longitudinal direction, at least part of the main plane is in projection overlapping and fixedly connected with the longitudinal ribs 3, and the adaptor 2 is fixedly connected with the upper surface of the steel beam 1 along the longitudinal bottom surface and the longitudinal ribs 3.
The girder steel 1 regard as the lower part main part, transversely set up in the below of concrete column 4, concrete column 4 vertically set up in the top of girder steel 1, concrete column 4 along fore-and-aft bottom with girder steel 1's top flange upper surface contact, just the axis direction of concrete column 4 with girder steel 1 top flange upper surface is perpendicular, by girder steel 1 lifts up concrete column 4. The adapter 2 is provided with a main plane extending along the longitudinal direction and a bottom surface and a top surface extending along the longitudinal direction, and the bottom surface extending along the longitudinal direction of the adapter 2 is fixedly connected with the upper surface of the upper flange of the steel beam 1. The longitudinal ribs 3 are arranged in the concrete column, and the longitudinal ribs 3 are suitable for bearing stress together with the concrete column 4. At least partial area of the main plane of the adapter piece 2 along the longitudinal direction is overlapped with the projection of the longitudinal rib 3 and is fixedly connected, and the bottom surface of the longitudinal rib 3 and the bottom surface of the adapter piece 2 along the longitudinal direction are fixedly connected with the upper surface of the upper flange of the steel beam 1 together. After the steel beam 1 and the longitudinal ribs 3 are fixedly connected through the adapter 2, concrete is poured into the steel beam to form a concrete column 4, so that the steel beam 1 is reliably connected with the concrete column 4 through the adapter 2, and torque is transmitted through the adapter 2.
Through adaptor 2 simultaneous fixed connection girder steel 1 with indulge muscle 3 makes girder steel 1 with the inside is provided with indulge muscle 3 concrete column 4 forms fixed connection, thereby makes the lower part girder steel 1 with upper portion reliable connection between the concrete column 4 and reliable transmission axial force, shearing force and moment of flexure.
Specifically, the adaptor 2 comprises angle steel, and two main planes of the angle steel are fixedly connected with the longitudinal ribs 3 at the same time.
The two main planes of the angle steel extending longitudinally are fixedly connected with the longitudinal ribs 3, so that the adapter 2 is fixedly connected with the longitudinal ribs 3.
As an additional implementation form, the adapter 2 further comprises a cross-shaped steel, an i-shaped steel or a channel steel. The adapter 2 is fixedly connected with the longitudinal ribs 3 through the fixed connection of any two adjacent main planes of the cross-shaped steel, the I-shaped steel or the channel steel and the longitudinal ribs 3.
The angle steel and the longitudinal rib 3 are fixedly connected in a position relation comprising that the longitudinal rib 3 can be arranged on the outer side of the intersection of two principal planes of the angle steel or on the outer side of the intersection of two principal planes of the angle steel.
Specifically, the axis of the longitudinal rib 3 is parallel to the ridge line of the angle steel, and the longitudinal rib 3 is arranged on the inner side of the intersection of the two main planes of the angle steel, so that the longitudinal rib is fixedly connected with the two main planes of the angle steel at the same time.
Preferably, the longitudinal ribs 3 are disposed on the inner side of the intersection of the two principal planes of the angle steel, and the axis of the longitudinal ribs 3 is parallel to the ridge line of the angle steel, so that the longitudinal ribs 3 are suitable for being fixedly connected with the two principal planes of the angle steel at the same time, and the longitudinal ribs 3 are reliably connected with the angle steel.
The longitudinal ribs 3 are arranged on the inner side of the intersection of the two main planes of the adapter 2 and are fixedly connected with the two main planes of the adapter 2, so that the reliability of connection of the adapter 2 and the longitudinal ribs 3 is improved, and the steel beam 1 and the longitudinal ribs 3 are reliably connected and transmit axial force, shearing force and bending moment.
Specifically, the quantity of angle steel is greater than one, every the angle steel all with one indulge muscle 3 fixed connection, a plurality of the angle steel distributes in girder steel 1 top flange plane.
The number of the angle steel is greater than one, the number of the longitudinal ribs 3 is the same as that of the angle steel, and each angle steel is fixedly connected with one longitudinal rib 3. The angle steel is distributed on the upper surface of the upper flange of the steel beam 1, the joint of the angle steel and the longitudinal ribs 3 is in the projection of the upper surface of the steel beam 1, the angle steel is uniformly distributed on a rectangular outer contour, the projections of two main planes of the angle steel on the upper surface of the steel beam 1 are respectively parallel to two sides of the rectangle which are mutually perpendicular, and the opening direction of the angle steel does not exceed the projection range of the concrete column 4 on the upper surface of the upper flange of the steel beam 1.
Specifically, the adaptor 2 is fixedly connected with the steel beam 1 through the bottom surface perpendicular to the ridge line.
The adaptor 2 is provided with a main plane extending longitudinally and a bottom surface and a top surface which are perpendicular to the ridge line, the main plane of the adaptor 2 is fixedly connected with the longitudinal rib 3, and the adaptor 2 is perpendicular to the bottom surface of the ridge line and fixedly connected with the steel beam 1, so that the adaptor 2 is suitable for being simultaneously fixedly connected with the longitudinal rib 3 and the steel beam 1, and the longitudinal rib 3 and the steel beam 1 are reliably connected.
Specifically, the fixed connection form of the adaptor 2 and the steel beam 1 comprises welding or bolting; the connection of the longitudinal ribs 3 to the adapter 2 comprises welding or bolting.
Preferably, the adaptor 2 and the steel beam 1 are fixedly connected through welding; the longitudinal ribs 3 and the adapter 2 are fixedly connected through welding. The steel beam 1 is fixedly connected with the longitudinal ribs 3 through the adapter 2, so that the steel beam 1 is reliably connected with the longitudinal ribs 3, and axial force, shearing force and bending moment are reliably transmitted.
Specifically, a stirrup 7 is arranged on the outer side of the adapter 2, and the stirrup 7 is fixedly connected with the adapter 2.
The stirrup 7 set up in the outside of adaptor 2, and with adaptor 2 fixed connection, stirrup 7 with adaptor 2 fixed connection's form includes welding, ligature connection.
Specifically, the axis of the stirrup 7 is perpendicular to the ridge line of the adaptor 2.
The plane where the stirrup 7 is located is perpendicular to the stupefied line of the adaptor 2, through being in the outside of the adaptor 2 sets up the stirrup 7, thereby through the stirrup 7 improves the shear capacity of the adaptor 2, reinforcing girder 1 with indulge muscle 3 passes through the reliability of adaptor 2 fixed connection, and then reinforcing girder 1 with the reliable connection of concrete column 4 and reliable transmission axial force, shearing force and moment of flexure.
Specifically, a vertical stiffening rib 6 is arranged on the inner side of the steel beam 1.
The number of the vertical stiffening ribs 6 is greater than one, the number of the vertical stiffening ribs 6 is the same as the number of the adapters 2, and each vertical stiffening rib 6 corresponds to one adapter 2.
Specifically, the vertical stiffening rib 6 is perpendicular to the steel beam web 5, and is disposed inside the steel beam 1 with respect to the connection point of the adapter 2 and the steel beam 1.
The plane of the vertical stiffening rib 6 is perpendicular to the plane of the steel beam web 5, and the height of the vertical stiffening rib 6 is matched with the interval between the lower surface of the upper flange of the steel beam 1 and the upper surface of the lower flange of the steel beam 1; the width of the vertical stiffening rib 6 is matched with the distance between the flange boundary of the steel beam 1 and the end face of the corresponding side of the steel beam web 5. The projection of the vertical stiffening rib 6 on the lower flange of the steel beam 1 is overlapped with the projection of the adapter 2 on the lower flange of the steel beam 1 at least in part. The connecting point of the adapter 2 and the upper flange of the steel beam 1 is provided with concentrated load, and a vertical stiffening rib 6 is arranged between the upper flange and the lower flange of the steel beam 1 and corresponds to the position of the connecting point of the adapter 2 and the upper flange of the steel beam 1, so that the stability of the connecting point of the adapter 2 and the upper flange of the steel beam 1 is improved.
The vertical stiffening ribs 6 are arranged between the upper flange and the lower flange of the steel beam 1 and correspond to the positions of the fixed connection points of the upper surface of the upper flange and the adapter 2, so that concentrated loads at the connection points of the steel beam 1 and the adapter 2 are avoided, the steel beam 1 is locally unstable, and the stability of the lower main body of the steel beam 1 is enhanced.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (10)

1. A steel beam to concrete column connection node, comprising:
the steel beam (1) is transversely arranged;
the concrete column (4) is longitudinally arranged, the bottom end of the concrete column (4) longitudinally contacts with the upper surface of the steel beam (1), and longitudinal ribs (3) are arranged in the concrete column (4);
the adaptor (2) is provided with a main plane extending longitudinally, at least part of the main plane is in projection overlapping and fixedly connected with the longitudinal ribs (3), and the adaptor (2) is fixedly connected with the upper surface of the steel beam (1) along the longitudinal bottom surface and the longitudinal ribs (3) at the same time.
2. The steel beam and concrete column connecting node according to claim 1, characterized in that the adapter (2) comprises angle steel, the two main planes of which are fixedly connected with the longitudinal bars (3) at the same time.
3. The steel beam and concrete column connecting node according to claim 2, characterized in that the axis of the longitudinal rib (3) is parallel to the ridge line of the angle steel, and the longitudinal rib (3) is arranged on the inner side of the intersection of the two main planes of the angle steel, so as to be fixedly connected with the two main planes of the angle steel at the same time.
4. A steel beam and concrete column connecting node according to claim 3, wherein the number of angle steel is greater than one, each angle steel is fixedly connected with one longitudinal rib (3), and a plurality of angle steel are distributed on the upper flange plane of the steel beam (1).
5. The steel beam and concrete column connecting node according to claim 1, characterized in that the adapter (2) is fixedly connected with the steel beam (1) through its bottom surface perpendicular to the ridge line.
6. The steel beam and concrete column connection node according to claim 5, characterized in that the fixed connection form of the adapter (2) to the steel beam (1) comprises a welded or bolted connection; the connection form of the longitudinal ribs (3) and the adapter (2) comprises welding or bolt connection.
7. The steel beam and concrete column connecting node according to claim 1, characterized in that a stirrup (7) is arranged outside the adapter piece (2), the stirrup (7) being fixedly connected with the adapter piece (2).
8. A steel girder and concrete column connecting node according to claim 7, characterized in that the axis of the stirrup (7) is perpendicular to the ridge line of the adapter (2).
9. The steel girder and concrete column connection node according to claim 1, characterized in that a vertical stiffening rib (6) is provided inside the steel girder (1).
10. The steel beam and concrete column connection node according to claim 9, characterized in that the vertical stiffening rib (6) is perpendicular to the steel beam web (5), arranged inside the steel beam (1) with respect to the connection point of the adapter (2) with the steel beam (1).
CN202320974490.XU 2023-04-23 2023-04-23 Steel beam and concrete column connecting node Active CN219952254U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202320974490.XU CN219952254U (en) 2023-04-23 2023-04-23 Steel beam and concrete column connecting node
DE202023104530.8U DE202023104530U1 (en) 2023-04-23 2023-08-10 Connection node between steel beam and concrete column

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320974490.XU CN219952254U (en) 2023-04-23 2023-04-23 Steel beam and concrete column connecting node

Publications (1)

Publication Number Publication Date
CN219952254U true CN219952254U (en) 2023-11-03

Family

ID=88094445

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320974490.XU Active CN219952254U (en) 2023-04-23 2023-04-23 Steel beam and concrete column connecting node

Country Status (2)

Country Link
CN (1) CN219952254U (en)
DE (1) DE202023104530U1 (en)

Also Published As

Publication number Publication date
DE202023104530U1 (en) 2023-09-04

Similar Documents

Publication Publication Date Title
CN211037273U (en) Steel joint is connected to assembled concrete structure primary and secondary roof beam
CN210947142U (en) Assembled concrete structure post roof beam connecting steel node
CN113737980B (en) Connection node of reinforced concrete floor and reinforced concrete shear wall
CN219952254U (en) Steel beam and concrete column connecting node
CN215166489U (en) Prefabricated column and prefabricated beam connected assembled node structure
CN113737981B (en) Connection node of reinforced concrete floor and steel plate concrete shear wall
CN214833419U (en) Beam joint and steel structure
CN112282442B (en) Cooling tower
CN211312838U (en) Connecting assembly of square steel and steel beam
CN110241975B (en) Section steel concrete column with multiple section steel
CN221052380U (en) Connection structure of girder steel and concrete bridge deck
CN219909358U (en) Connection structure of box post and steel reinforcement cage
CN115787852B (en) Rigid connection node connection structure of cross support column and system thereof
CN220565410U (en) Column base conversion node
CN221118228U (en) Pier top cap and pier
CN217399923U (en) Steel beam connecting structure
CN220100191U (en) Core tube
CN219137989U (en) Steel construction secondary beam is with concrete structure girder connection structure
CN220868462U (en) Connection structure of cushion cap and steel pipe column
CN220565412U (en) Central reinforced space steel structure
CN219450406U (en) Steel structure composite beam and composite bridge
CN219637951U (en) Tower crane foundation suitable for narrow and small construction sites
CN219508823U (en) Mixed rigid connection node of steel module building structure
CN219708839U (en) Bridge assembled lifting appliance applicable to different beam lengths
CN214939272U (en) Railway steel truss girder combined bridge deck structure and system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant