CN112854596A - Combined beam with perforated steel plate connecting piece and split stud connecting piece and construction method - Google Patents
Combined beam with perforated steel plate connecting piece and split stud connecting piece and construction method Download PDFInfo
- Publication number
- CN112854596A CN112854596A CN202110246663.1A CN202110246663A CN112854596A CN 112854596 A CN112854596 A CN 112854596A CN 202110246663 A CN202110246663 A CN 202110246663A CN 112854596 A CN112854596 A CN 112854596A
- Authority
- CN
- China
- Prior art keywords
- steel
- section steel
- connecting piece
- split
- cast
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0636—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts
- E04C5/064—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts the reinforcing elements in each plane being formed by, or forming a, mat of longitunal and transverse bars
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Rod-Shaped Construction Members (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The utility model provides a combination beam of area trompil steel sheet connecting piece and components of a whole that can function independently stud connecting piece, includes: section steel; the split-type stud connecting pieces are arranged in the middle of the upper flange of the section steel along the length direction; the two perforated steel plate connecting pieces are arranged on the upper flange of the section steel along the length direction and are respectively positioned on two sides of the split stud connecting piece; the cast-in-place concrete structure comprises a top transverse rib and a top longitudinal rib which are arranged in the cast-in-place flange plate at the top of the section steel and cast-in-place concrete filled in the cast-in-place flange plate at the top of the section steel. The present invention may further comprise: a plurality of transverse penetrating steel bars which are arranged on the two perforated steel plate connecting pieces in a penetrating way; the invention relates to a bottom longitudinal bar arranged in a cast-in-place flange plate at the bottom of section steel, which is based on the thought that a rigid and flexible shear connector bears the force in two stages in a composite beam, can improve the longitudinal shear resistance between the section steel and cast-in-place concrete, enables the composite beam to have the characteristic of bearing the force in two stages, and has the advantages of high bearing capacity, good integrity, good fatigue resistance, improved cracking resistance and durability, convenient construction and the like.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a combined beam with a perforated steel plate connecting piece and a split stud connecting piece and a construction method.
Background
In the conventional composite beam structure, since a longitudinal shear force transmitted from a concrete wing plate exists between section steel and concrete, a shear connector needs to be arranged, and the common shear connectors are classified into a rigid connector and a flexible connector. If the rigid connecting piece is arranged on the section steel, the combined beam is easy to be subjected to brittle failure when the shear-resistant bearing capacity limit is reached, and if the flexible connecting piece is arranged on the section steel, the interface can be greatly slipped.
The stud connecting piece is the most widely applied flexible connecting piece, but the stud connecting piece with larger height is easier to be subjected to bending deformation, so that the stud connecting piece has better ductility; shorter peg elements are less prone to bending deformation and are therefore more brittle and less ductile. The length-diameter ratio of the split-type stud is only about 2 to 2.5, the upper part of the stud is split, the lower part of the stud is connected, the length-diameter ratio requirement is met by utilizing a variable cross section structure, so that the ductility requirement is met, but the split-type stud has a large reduction effect on the bearing capacity of the stud, and the bearing capacity requirement is met by increasing the diameter of the stud.
The perforated steel plate connecting piece is one of rigid connecting pieces, has high rigidity, strength and fatigue resistance, is more suitable for being applied to bridge structures with relatively large load and high fatigue requirements, and is usually shear failure of in-hole concrete and brittle failure during failure.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the composite beam with the perforated steel plate connecting piece and the split stud connecting piece and the construction method, which keep the advantages of the rigid connecting piece and the flexible connecting piece, simultaneously overcome the respective defects of the two connecting pieces and have the characteristics of simple and convenient construction, flexible design and excellent performance.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a combination beam of area trompil steel sheet connecting piece and components of a whole that can function independently stud connecting piece, includes:
1, section steel;
the split-type stud connecting pieces 2 are arranged in the middle of the upper wing edge of the section steel 1 along the length direction;
the two perforated steel plate connecting pieces 3 are arranged on the upper flange of the section steel 1 along the length direction and are respectively positioned on two sides of the split stud connecting piece 2, a plurality of round holes are formed in each perforated steel plate connecting piece 3 along the length direction, and the round holes in the two perforated steel plate connecting pieces 3 are in one-to-one correspondence;
the top transverse rib 6 is arranged in the cast-in-place flange plate at the top of the section steel;
the top longitudinal rib 7 is arranged in the cast-in-place flange plate at the top of the section steel;
and the number of the first and second groups,
and the cast-in-place concrete 8 is filled in the cast-in-place flange plate at the top of the section steel.
The components of a whole that can function independently peg 2 welds in the middle of 1 last flange of shaped steel, trompil steel sheet connecting piece 3 welds in 1 last flange of shaped steel along the fillet weld for the steel sheet two sides to along 1 last flange longitudinal arrangement of shaped steel, trompil steel sheet connecting piece 3 is located 2 both sides of components of a whole that can function independently peg and symmetrical arrangement, the horizontal muscle 6 in top and the 7 laps of the muscle are indulged in top constitute the reinforcing bar net in the cast-in-place flange of shaped steel top board jointly.
The structural steel 1 is H-shaped steel or I-shaped steel, the perforated steel plate connecting piece 3 is made by uniformly arranging round holes on Q235 or Q345 steel plates, the thickness of the perforated steel plate connecting piece 3 is 16mm, 22mm or 25mm, the height of the perforated steel plate connecting piece is 100mm, 150mm or 200mm, the diameter of each opening is 50mm, 60mm or 75mm, the distance between every two adjacent holes is 100mm or 150mm, the distance between every two adjacent holes is 150mm or 200mm, the diameters of the top transverse rib 6 and the top longitudinal rib 7 are 16mm, 22mm or 25mm, the perforated steel plate connecting piece is uniformly arranged in a cast-in-place flange plate at the top of the composite beam structural steel according to the structure, and the strength grade of concrete adopted by the cast-in-place flange plate 8 is common concrete or ultrahigh-.
The split-type stud connecting piece 2 is split at the upper part and connected at the lower part.
The diameter of the split-type stud connecting piece 2 is 32mm or 40mm, the length-diameter ratio is 2 or 2.5, the slotting height is 10mm to 13mm, the slotting width is 2mm, the split-type stud connecting pieces 2 are uniformly arranged in the middle of the upper wing edge of the section steel 1, and the arrangement distance between every two adjacent split-type stud connecting pieces 2 is 150mm, 200mm or 250 mm.
Preferably, the present invention may further comprise:
a plurality of transverse through reinforcing steel bars 4 which are arranged in the corresponding round holes of the two perforated steel plate connecting pieces 3 in a penetrating way;
the bottom longitudinal bar 5 is arranged in the cast-in-place flange plate at the bottom of the section steel, and the bottom longitudinal bar 5 and the transverse through reinforcing steel bar 4 are in lap joint to jointly form a reinforcing steel bar mesh in the cast-in-place flange plate at the bottom of the section steel.
At least one split bolt connecting piece 2 is arranged between the adjacent transverse penetrating reinforcing steel bars 4.
The diameters of the transverse through reinforcing steel bars 4 and the bottom longitudinal bars 5 are 16mm, 22mm or 25mm, and the transverse through reinforcing steel bars and the bottom longitudinal bars are arranged in the cast-in-situ flange plate at the bottom of the combined beam section steel according to the structure.
The invention also provides a construction method of the prefabricated steel reinforced concrete beam with the transverse steel partition plate, which comprises the following steps:
1. in a factory, the split-type studs 2 are uniformly welded on the upper flange of the section steel 1, and the perforated steel plate connecting pieces 3 are longitudinally arranged along the upper flange of the section steel 1 and are connected through fillet welds.
2. On site, top transverse ribs 6 and top longitudinal ribs 7 are uniformly arranged at the top of the section steel, and a cast-in-place concrete flange plate 8 is poured above the section steel 1 to complete the construction of the beam.
When indulging muscle 5 including above-mentioned horizontal through reinforcement 4 and bottom, in step 2, earlier transversely run through reinforcement 4 and pass 3 round holes of trompil steel sheet connecting piece and arrange, indulge muscle 5 ligature to the horizontal through reinforcement with the bottom on, then evenly arrange the horizontal muscle 6 in top and the muscle 7 is indulged at the top of shaped steel.
Compared with the prior art, the invention has the beneficial effects that:
1) and the function is improved.
The rigid perforated steel plate connecting piece and the flexible stud connecting piece are arranged on the section steel of the combined beam, so that the combined beam has the characteristic of two-stage stress, the first stage is that the rigid perforated steel plate connecting piece resists the shearing force between the section steel and concrete firstly, and when the shearing force between the section steel and the perforated steel plate connecting piece rises to a certain degree, the flexible split stud connecting piece is stressed, so that the combined beam cannot be directly subjected to brittle failure, and the combined beam has the characteristics of high bearing capacity and good ductility.
2) The construction is simple.
The perforated steel plate and the stud welding of the composite beam are all prefabricated and produced in a factory, and then the prefabricated section steel is directly connected with the composite column or the steel column (or is in transition connection with the concrete column) in a construction site, and after the upper reinforcing steel bars are arranged, the concrete slab is poured to complete the construction and installation of the composite beam. Compared with the traditional composite beam construction and installation, the stud welding is not needed on site. Through reasonable design, the construction and installation of the composite beam are more convenient and quicker, and the construction performance is greatly improved.
3) The design is flexible.
Each part of the composite beam can be selected according to the actual requirements on site, and various types of composite beams can be optimally combined by mutually combining prefabricated section steel with different strengths, different materials and cast-in-situ flange plates with different strengths, have performance characteristics and advantages and are suitable for different engineering condition requirements.
Drawings
FIG. 1 is a schematic cross-sectional view of a composite beam of the present invention.
Fig. 2 is a perspective view of the composite girder according to the present invention.
Fig. 3 is a side view of the composite beam of the present invention.
Fig. 4 is a plan view of the composite girder of the present invention.
Fig. 5 is a schematic view of another composite beam provided by the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The invention relates to a combination beam with an open-pore steel plate connecting piece and a split toggle pin connecting piece, which can improve the longitudinal shear resistance between profile steel and cast-in-place concrete based on the idea that rigid and flexible shear-resistant connecting pieces bear force in two stages in the combination beam.
As shown in fig. 1, 2, 3 and 4, the invention mainly comprises section steel 1, a plurality of split stud connectors 2, two perforated steel plate connectors 3, a plurality of transverse through reinforcing steel bars 4, bottom longitudinal bars 5, top transverse bars 6, top longitudinal bars 7 and cast-in-place concrete 8. After the cast-in-place, the upper part of the section steel 1, the split stud connecting piece 2, the perforated steel plate connecting piece 3, the transverse through reinforcing steel bar 4, the bottom longitudinal bar 5, the top transverse bar 6 and the top longitudinal bar 7 are all positioned in the cast-in-place part.
Specifically, the method comprises the following steps:
the section steel 1 can be H-shaped steel or I-shaped steel.
The split-type stud connecting pieces 2 are arranged in the middle of the upper flange of the section steel 1 in a welding mode and the like along the length direction, and the upper parts of the split-type stud connecting pieces 2 are split and the lower parts of the split-type stud connecting pieces are connected. The diameter of the slots can be 32mm or 40mm, the length-diameter ratio is generally 2 or 2.5, the height of the slots can be 10mm to 13mm, and the width of the slots can be 2 mm. The split-type stud connecting pieces 2 are preferably uniformly arranged right in the middle of the upper flange of the section steel 1, and the adjacent distance is 150mm, 200mm or 250mm according to requirements.
Two trompil steel sheet connecting pieces 3 set up in 1 top flange of shaped steel and symmetrical arrangement in components of a whole that can function independently stud connecting piece 2 both sides along length direction, specifically can weld in 1 top flange of shaped steel with the fillet weld on its steel sheet both sides to along 1 top flange longitudinal arrangement of shaped steel, be provided with a plurality of round holes along length direction on every trompil steel sheet connecting piece 3, the round hole one-to-one on two trompil steel sheet connecting pieces 3. The perforated steel plate connecting piece 3 can be made by uniformly arranging round holes on Q235 or Q345 steel plates, the thickness of the perforated steel plate connecting piece can be 16mm, 22mm or 25mm, the height of the perforated steel plate connecting piece can be 100mm, 150mm or 200mm, the diameter of each perforated steel plate can be 50mm, 60mm or 75mm, the distance between every two adjacent holes can be 100mm or 150mm, and the distance between every two adjacent holes can be 150mm or 200 mm.
A plurality of transverse through reinforcing steel bars 4 are respectively arranged in the corresponding round holes of the two perforated steel plate connecting pieces 3 in a penetrating way, and at least one split bolt connecting piece 2 is generally arranged between every two adjacent transverse through reinforcing steel bars 4.
The bottom longitudinal bar 5 is arranged in the cast-in-situ flange plate at the bottom of the section steel, the diameter of the transverse through reinforcing steel bar 4 and the diameter of the bottom longitudinal bar 5 are 16mm, 22mm or 25mm, the bottom longitudinal bar 5 and the transverse through reinforcing steel bar 4 are overlapped to form a reinforcing mesh in the cast-in-situ flange plate at the bottom of the section steel together according to the structure arrangement in the cast-in-situ flange plate at the bottom of the combination beam section steel.
The top transverse rib 6 is arranged in the cast-in-situ flange plate at the top of the section steel.
The top longitudinal bar 7 is arranged in the cast-in-situ flange plate at the top of the section steel, the diameters of the top transverse bar 6 and the top longitudinal bar 7 are 16mm, 22mm or 25mm, the top transverse bar 6 and the top longitudinal bar 7 are uniformly arranged in the cast-in-situ flange plate at the top of the combined beam section steel according to the structure, and the top transverse bar 6 and the top longitudinal bar 7 are in lap joint to jointly form a reinforcing mesh in the cast-in-situ flange plate at the top of the section.
The cast-in-place concrete 8 is filled in the cast-in-place flange plate at the top of the section steel, and the strength grade of the adopted concrete is common concrete or ultra-high performance concrete.
Wherein:
1) the flexible connecting piece adopts a split bolt connecting piece, so that the crack resistance and the ductility of the composite beam can be improved.
2) The strength, thickness, width, spacing and other design parameters of the perforated steel plate connecting piece can be optimally designed according to a corresponding design calculation method.
3) The section steel 1 can be H-shaped steel or I-shaped steel, and the size is adjusted to meet the actual use requirement.
The invention also provides a construction method of the prefabricated steel reinforced concrete beam with the transverse steel partition plate, which comprises the following steps:
1. in a factory, the split-type studs 2 are uniformly welded on the upper flange of the section steel 1, and the perforated steel plate connecting pieces 3 are longitudinally arranged along the upper flange of the section steel 1 and are connected through fillet welds.
2. On the scene, will transversely run through reinforcing bar 4 and pass 3 round holes of trompil steel sheet connecting piece and arrange, indulge the muscle 5 ligature to transversely run through on the reinforcing bar with the bottom, evenly arrange the horizontal muscle 6 in top and the muscle 7 is indulged at the top at the shaped steel back, pour the construction that this roof beam is accomplished to cast in situ concrete flange board 8 to 1 top of shaped steel.
Fig. 5 is a schematic view of another composite girder according to the present invention, except that there are no transverse through-reinforcements 4 and bottom longitudinal reinforcements 5, so that construction is more convenient, and ductility is provided by means of the UHPC shear in the hole and the studs. In this scheme, during the construction save transversely run through reinforcing bar 4 and the link of bottom longitudinal bar 5 can.
The invention can optimize and combine various types of combination beams by combining the section steels in different forms and the cast-in-place flange plates in different forms, has various performance characteristics and advantages, and is suitable for different engineering requirements.
Claims (10)
1. The utility model provides a combination beam of area trompil steel sheet connecting piece and components of a whole that can function independently stud connecting piece which characterized in that includes:
a section steel (1);
a plurality of split stud connecting pieces (2) which are arranged in the middle of the upper wing edge of the section steel (1) along the length direction;
the two perforated steel plate connecting pieces (3) are arranged on the upper flange of the section steel (1) along the length direction and are respectively positioned on two sides of the split stud connecting piece (2), a plurality of round holes are formed in each perforated steel plate connecting piece (3) along the length direction, and the round holes in the two perforated steel plate connecting pieces (3) correspond to one another;
a top transverse rib (6) arranged in the cast-in-place flange plate at the top of the section steel;
the top longitudinal rib (7) is arranged in the cast-in-place flange plate at the top of the section steel;
and the number of the first and second groups,
and cast-in-place concrete (8) filled in the cast-in-place flange plate at the top of the section steel.
2. The composite beam with the perforated steel plate connectors and the split pin connectors as claimed in claim 1, wherein the split pin (2) is welded in the middle of the top flange of the section steel (1), the perforated steel plate connectors (3) are welded to the top flange of the section steel (1) along two sides of the steel plate by fillet welding and are arranged along the top flange of the section steel (1) longitudinally, the perforated steel plate connectors (3) are positioned on two sides of the split pin (2) and are arranged symmetrically, and the top transverse ribs (6) and the top longitudinal ribs (7) are overlapped to form a reinforcing mesh in the cast-in-place top flange plate of the section steel.
3. The combination beam with the perforated steel plate connecting piece and the split-type stud connecting piece according to claim 1, wherein the section steel (1) is H-shaped steel or I-shaped steel, the perforated steel plate connecting piece (3) is made of Q235 or Q345 steel plates uniformly provided with round holes, the perforated steel plate connecting piece (3) is 16mm, 22mm or 25mm in thickness, 100mm, 150mm or 200mm in height, 50mm, 60mm or 75mm in diameter of a perforated hole, 100mm or 150mm in distance between two adjacent holes, 150mm or 200mm in distance between the two plates, the top transverse rib (6) and the top longitudinal rib (7) are 16mm, 22mm or 25mm in diameter, the combination beam is uniformly arranged in the cast-in-situ flange plate at the top of the section steel according to the structure, and the strength grade of concrete adopted by the cast-in-situ flange plate (8) is ordinary concrete or ultrahigh-performance concrete.
4. The composite beam with the perforated steel plate connecting piece and the split-type stud connecting piece according to claim 1, wherein the split-type stud connecting piece (2) is a split upper part and is connected with a split lower part.
5. The combination beam with the perforated steel plate connecting piece and the split bolt connecting pieces according to claim 4, characterized in that the diameter of the split bolt connecting pieces (2) is 32mm or 40mm, the length-diameter ratio is 2 or 2.5, the height of the slot is 10mm to 13mm, the width of the slot is 2mm, the split bolt connecting pieces (2) are uniformly arranged in the middle of the upper flange of the section steel (1), and the arrangement distance between the adjacent split bolt connecting pieces (2) is 150mm, 200mm or 250 mm.
6. The composite girder according to any one of claims 1 to 5, which comprises the perforated steel plate connectors and the split-pin connectors, further comprising:
a plurality of transverse penetrating steel bars (4) which penetrate through corresponding round holes of the two perforated steel plate connecting pieces (3);
the bottom longitudinal bar (5) is arranged in the cast-in-place flange plate at the bottom of the section steel, and the bottom longitudinal bar (5) and the transverse through reinforcing steel bar (4) are overlapped to jointly form a reinforcing steel bar mesh in the cast-in-place flange plate at the bottom of the section steel.
7. The composite girder according to claim 6, wherein at least one split pin connector (2) is provided between adjacent transversal penetration bars (4).
8. The composite beam with the perforated steel plate connecting member and the split-pin connecting member as claimed in claim 6, wherein the transverse through-reinforcing steel bars (4) and the bottom longitudinal bars (5) have a diameter of 16mm, 22mm or 25mm and are constructed in the cast-in-place flange plate at the bottom of the section steel of the composite beam.
9. The construction method of a composite girder having perforated steel plate connectors and split-type stud connectors according to claim 1, comprising the steps of:
1) and in a factory, the split-type studs (2) are uniformly welded on the upper flange of the section steel (1), and the perforated steel plate connecting pieces (3) are longitudinally arranged along the upper flange of the section steel (1) and are connected through fillet welds.
2) And on site, uniformly arranging a top transverse rib (6) and a top longitudinal rib (7) at the top of the section steel, and pouring a cast-in-place concrete flange plate (8) above the section steel (1) to complete the construction of the beam.
10. The construction method according to claim 9, wherein in the step 2), the transverse through bars (4) are firstly arranged through the round holes of the perforated steel plate connecting pieces (3), the bottom longitudinal bars (5) are bound to the transverse through bars, and then the top transverse bars (6) and the top longitudinal bars (7) are uniformly arranged on the top of the section steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246663.1A CN112854596A (en) | 2021-03-05 | 2021-03-05 | Combined beam with perforated steel plate connecting piece and split stud connecting piece and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246663.1A CN112854596A (en) | 2021-03-05 | 2021-03-05 | Combined beam with perforated steel plate connecting piece and split stud connecting piece and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112854596A true CN112854596A (en) | 2021-05-28 |
Family
ID=75994194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110246663.1A Pending CN112854596A (en) | 2021-03-05 | 2021-03-05 | Combined beam with perforated steel plate connecting piece and split stud connecting piece and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112854596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809443A (en) * | 2022-04-29 | 2022-07-29 | 东南大学 | Bearing-fireproof integrated prefabricated prestressed concrete combined secondary beam and manufacturing method thereof |
-
2021
- 2021-03-05 CN CN202110246663.1A patent/CN112854596A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809443A (en) * | 2022-04-29 | 2022-07-29 | 东南大学 | Bearing-fireproof integrated prefabricated prestressed concrete combined secondary beam and manufacturing method thereof |
| CN114809443B (en) * | 2022-04-29 | 2024-04-16 | 东南大学 | Bearing-fireproof integrated precast prestressed reinforced concrete combined secondary beam and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108660921B (en) | Orthotropic steel-ultra-high performance concrete bridge deck structure and construction method thereof | |
| CN108385503A (en) | A kind of assembled light combination beam freely-supported structure changes continuous structure and its construction method | |
| CN111424546A (en) | Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method | |
| CN212773147U (en) | Prefabricated assembly part outsourcing honeycomb steel-concrete combination beam | |
| CN207878254U (en) | A kind of assembled light combination beam freely-supported structure changes continuous structure | |
| CN112854596A (en) | Combined beam with perforated steel plate connecting piece and split stud connecting piece and construction method | |
| CN113062476A (en) | Heavy-load large-span combined beam-column structure and construction method | |
| CN112482200A (en) | Connecting structure of hogging moment area of steel-concrete combined continuous beam and construction method thereof | |
| CN217974039U (en) | Bridge deck structure | |
| CN214995230U (en) | Combined beam with perforated steel plate connecting piece and split stud connecting piece | |
| CN216338993U (en) | Longitudinal joint for steel-UHPC (ultra high performance concrete) assembled pi-shaped combination beam | |
| CN114622485B (en) | Pier top cast-in-situ joint structure adopting embedded steel strip and construction method thereof | |
| CN212582397U (en) | Combined beam of steel, common concrete and ultrahigh-performance concrete | |
| CN110924303B (en) | Steel beam and built-in steel reinforced concrete slab continuous combination beam and construction method | |
| CN112195751A (en) | Semi-penetrating type steel truss bridge | |
| JP2002275833A (en) | Continuing method of simple beam of existing bridge and continuous beam structure | |
| CN114737604B (en) | I-shaped steel concrete top cover frame system of extra-large span underground space under heavy load | |
| CN112282207A (en) | Combined beam, spliced beam and subway station | |
| CN114737605B (en) | Box-type steel concrete top cover and frame system for oversized underground space under heavy load | |
| CN114809072B (en) | Underground space prestress steel reinforced concrete top cover under oversized span heavy load | |
| CN217948777U (en) | Assembled steel-concrete combined bridge deck structure | |
| CN220789422U (en) | Assembled steel-concrete combined bridge deck | |
| CN209798536U (en) | Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge | |
| CN215368130U (en) | Connecting node of steel bar truss laminated slab and steel frame | |
| CN220451088U (en) | Post-tensioned bonded precast prestressed concrete open-pore beam frame structure system connected by UHPC (ultra high pressure concrete) |
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 |