CN209907232U - Sandwich type top and bottom plate shear-strengthening concrete slab beam structure - Google Patents
Sandwich type top and bottom plate shear-strengthening concrete slab beam structure Download PDFInfo
- Publication number
- CN209907232U CN209907232U CN201920187667.5U CN201920187667U CN209907232U CN 209907232 U CN209907232 U CN 209907232U CN 201920187667 U CN201920187667 U CN 201920187667U CN 209907232 U CN209907232 U CN 209907232U
- Authority
- CN
- China
- Prior art keywords
- concrete
- layer
- concrete plate
- thickness
- plate girder
- 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
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model provides a sandwich type top bottom plate shear reinforcement's concrete slab beam structure, include: a concrete slab beam; the bottom surface of the top concrete integrated layer is fixedly connected with the top surface of the concrete plate beam, the standard value of the compressive strength of the top concrete integrated layer is not less than 60MPa, the top surface of the concrete plate beam is completely reinforced, and the thickness of the top concrete integrated layer is 50-150 mm; the top surface of the bottom reinforcing layer is fixedly connected with the bottom surface of the concrete plate beam, the design value of the tensile strength of the bottom reinforcing layer is larger than or equal to 15MPa, the bottom surface of the concrete plate beam is reinforced in the whole width or the local width along the length direction of the beam, and the thickness of the bottom reinforcing layer is 8-50 mm. The utility model discloses can be respectively full play concrete plate girder's top concrete wholeization layer, the material resistance to compression, the tensile strength of bottom back up coat, promote the structure bearing capacity that shears by a wide margin, can effectively solve in labour reinforcing bar and prestressed concrete plate girder bridge ubiquitous design load level low, the anti not enough problem of bearing capacity that shears.
Description
Technical Field
The utility model relates to a bridge consolidates the field, especially relates to a sandwich type top bottom plate concrete slab beam structure that shears reinforcement.
Background
The concrete slab beam has the advantages of simple prefabrication, convenient installation, low cost and the like, and is widely applied to medium and small span bridges. However, with the development of national economy and heavy traffic vehicles, the problems of insufficient shear bearing capacity, concrete cracking, steel bar corrosion, hinge joint connection failure and the like generally exist in the steel reinforced concrete and prestressed concrete plate girder bridges in service in China. The diseases, especially the shearing resistance and the bearing capacity are insufficient, the service life of the disease is seriously influenced, and huge potential traffic safety hazards are brought.
For concrete slab beams with insufficient shear bearing capacity, it is a common practice to remove the concrete slab beam and replace it with a new beam with a reinforced section and a heightened height. However, the method for replacing the new beam not only has long reconstruction and extension period, consumes a large amount of reinforced concrete materials and increases a large amount of construction cost, but also generates a large amount of construction waste due to the demolished concrete plate beam, thereby bringing about serious environmental protection problems. Therefore, the method for reinforcing the existing concrete plate girder is an effective way for energy conservation and environmental protection.
At present, the shear-resistant reinforcing method of the concrete plate girder comprises a section enlarging method, a surface pasting method, an external prestress and system changing reinforcing method and the like. The traditional method for increasing the cross section can obviously reduce the net height under the bridge and increase the self weight of the structure. The method for sticking the carbon fiber cloth has the problems of aging and peeling of the adhesive, poor fire resistance of the carbon fiber cloth and the like. In-vitro prestress and a system reinforcing method are changed, so that the problems of complex reinforcing process and the like exist. In recent years, ordinary concrete beams are reinforced by adopting ultra-high performance concrete abroad, but in the method, the ultra-high performance concrete is only applied in a tension area, and the improvement range of the shear-resistant bearing capacity is limited. Meanwhile, the problems of high cost of the ultra-high performance concrete, difficult construction and maintenance of the bottom of the beam and the like exist.
Therefore, the development of a novel shear-resistant bearing capacity reinforcing structure for a concrete plate girder, which has the advantages of high efficiency, low cost, convenient construction and environmental protection, is urgently needed.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a sandwich type top bottom plate shear reinforcement's concrete slab beam structure to the technical problem who proposes above at least partial solution.
(II) technical scheme
According to the utility model discloses an aspect provides a sandwich type top bottom plate concrete slab beam structure that shears and consolidates, include:
a concrete slab beam;
the bottom surface of the top concrete integrated layer is fixedly connected with the top surface of the concrete plate girder;
and the top surface of the bottom reinforcing layer is fixedly connected with the bottom surface of the concrete plate beam.
In some embodiments, the top concrete integrated layer is reinforced on the top surface of the concrete plate girder, the thickness of the top concrete integrated layer is 50-150 mm, and the standard value of the compressive strength of the top concrete integrated layer is more than or equal to 60 MPa.
In some embodiments, the concrete plate girder structure further includes:
the reinforcing bar net piece, the reinforcing bar net piece sets up in the middle of the top concrete integration layer along the length direction level of roof beam, reinforcing bar net piece diameter is 8 ~ 12mm, with horizontal vertical 100 ~ 150 mm's interval set up horizontally in the intermediate position of top concrete integration layer thickness direction.
In some embodiments, the bottom reinforcing layer is reinforced on the whole width or part of the bottom surface of the concrete plate beam along the length direction of the beam, the thickness is 8-50 mm, and the design value of the tensile strength is larger than or equal to 15 MPa.
In some embodiments, when the design value of the tensile strength of the bottom reinforcing layer is less than or equal to 20MP and the thickness of the bottom reinforcing layer is greater than or equal to 40mm, reinforcing mesh sheets with the diameter of 8mm and the distance of 100-150 mm are arranged in the middle of the bottom reinforcing layer in the thickness direction.
In some embodiments, the bottom reinforcing layer is made of modified polymer concrete with the thickness of 30-50 mm or a steel plate with the thickness of 8-16 mm.
In some embodiments, the concrete plate girder structure further includes:
the bar planting, the bar planting sets up vertically between the top surface of the bottom surface on top concrete wholeization layer and concrete slab roof beam, the bar planting is 300 ~ 500mm along roof beam length direction interval, is 200 ~ 300mm along the roof beam transverse direction interval, and the diameter is 8 ~ 12 mm.
In some embodiments, the concrete on the top and bottom surfaces of the concrete slab beam is subjected to roughening treatment to expose concrete coarse aggregate, and the treatment thickness is 10-20 mm.
(III) advantageous effects
According to the above technical scheme, the utility model discloses sandwich type top bottom plate shear reinforcement's concrete slab beam structure has one of them of following beneficial effect at least:
(1) the utility model can respectively give full play to the material compression resistance and tensile strength of the top concrete integrated layer and the bottom reinforcing layer of the concrete plate girder, greatly improve the shear bearing capacity of the structure, and effectively solve the problems of low design load level and insufficient shear bearing capacity commonly existing in-service reinforcing steel bars and prestressed concrete plate girder bridges;
(2) the material compressive strength standard value of the top concrete integrated layer of the utility model is more than or equal to 60MPa, and the super high performance concrete material containing coarse aggregate can be adopted, so that the compressive strength is high, the shear bearing capacity is enhanced, the steam curing is not needed in the construction, and the construction period is short; moreover, the top concrete integrated layer can improve the anti-cracking performance and the shock resistance of the existing concrete plate girder top plate, reduce the phenomena of cracking and local damage of the bridge deck top plate and greatly improve the durability of the bridge;
(3) the utility model discloses the material tensile strength design value of bottom back up coat is greater than or equal to 15MPa, can adopt thickness 30 ~ 50 mm's Modified Polymer Concrete (MPC) or thickness to be 8 ~ 16 mm's steel sheet, and the thickness of bottom back up coat is thin, and construction convenience, construction period are short, can effectively guarantee under the roof beam headroom requirement. Moreover, the bottom reinforcing layer can improve the crack resistance of the existing concrete slab beam bottom plate, reduce the phenomena of cracking and local damage of the bridge floor bottom plate and greatly improve the durability of the bridge.
(4) The utility model provides a method for calculating the total shearing resistance bearing capacity of a concrete plate girder after shearing resistance reinforcement, which has clear concept, is practical and convenient, has strong operability and provides an effective method for the shearing resistance reinforcement design;
(5) the utility model provides a have that anti shearing bearing capacity raises the efficiency height, the cost is low, the design is simple, construction convenience, green, economic nature are good, the durability is good, advantages such as extensive applicability.
Drawings
Fig. 1(a) is a schematic longitudinal section of a concrete plate girder reinforced structure according to an embodiment of the present invention.
Fig. 1(b) is a schematic cross-sectional view of a concrete slab beam reinforcing structure of a single locally reinforced bottom reinforcing layer according to an embodiment of the present invention.
Fig. 1(c) is a schematic cross-sectional view of a reinforced structure of a concrete slab beam in which a bottom reinforcing layer is three local reinforcements according to an embodiment of the present invention.
Fig. 2(a) is a schematic exploded view of a method for calculating the shear-resistant bearing capacity of a reinforced concrete slab beam structure in which the bottom reinforcing layer of the high-toughness material is a single local reinforcement.
Fig. 2(b) is a schematic exploded view of a method for calculating the shear-resistant bearing capacity of a reinforced concrete slab beam structure in which the bottom reinforcing layer of the high-toughness material is three locally reinforced pieces.
[ description of the main reference numerals in the drawings ] for the embodiments of the present invention
1. A concrete slab beam;
101. longitudinal reinforcing steel bars; 102. Hooping;
2. a top concrete integrated layer;
201. reinforcing mesh sheets;
3. a bottom reinforcement layer; 4. bar planting
Detailed Description
The utility model provides a sandwich type top bottom plate shear reinforcement's concrete slab beam structure. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
Certain embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
Fig. 1(a) is a schematic longitudinal section view of a sandwich-type top-bottom plate shear-strengthening concrete slab beam structure according to an embodiment of the present invention. The method comprises the following steps: the concrete slab beam comprises a concrete slab beam 1, a top concrete integrated layer 2, a bottom reinforcing layer 3, longitudinal steel bars 101 of the concrete slab beam 1, stirrups 102 of the concrete slab beam 1, a steel bar mesh 201 of the top concrete integrated layer and embedded steel bars 4.
Wherein, the bottom surface of top concrete integrated layer 2 concretes with the top surface of concrete slab beam 1, and the top surface of bottom reinforced layer 3 concretes with the bottom surface of concrete slab beam 1. The length direction level that vertical reinforcing bar 101 was followed the roof beam sets up in the bottom of concrete slab beam 1, stirrup 102 sets up in concrete slab beam 1 main part along the vertical axle axis of concrete slab beam 1 circumference, reinforcing bar net piece 201 sets up in the middle of top concrete wholeization layer 2 along the length direction level of roof beam, bar planting 4 sets up between the bottom surface of top concrete wholeization layer 2 and the top surface of concrete slab beam 1.
The following is a detailed description of each part of the sandwich type top-bottom plate shear-reinforced concrete plate girder structure according to the present embodiment.
Specifically, the concrete slab beam 1 may have a hollow structure inside along the length direction of the beam, and the concrete structure may have a shape of a rectangular parallelepiped or the like.
The top concrete integrated layer 2 is made of high-performance concrete materials, the standard value of the compressive strength of the materials is larger than or equal to 60MPa, the top surfaces of the concrete plate beams 1 are all reinforced, the thickness of the top concrete integrated layer is 50-150 mm, and reinforcing mesh sheets 201 with the diameter of 8-12 mm and the distance of 100-150 mm are arranged in the middle of the top concrete integrated layer in the thickness direction.
Further, the top concrete integrated layer 2 can be made of an ultra-high performance concrete material containing coarse aggregate, and the proportion is as follows:
the bottom reinforcing layer 3 is made of a high-toughness material, the design value of the tensile strength of the material is more than or equal to 15MPa, the bottom reinforcing layer is reinforced in the whole width or local width range along the length direction of the beam on the bottom surface of the concrete plate beam, and the thickness of the bottom reinforcing layer is 8-50 mm.
Fig. 1(b) is a schematic cross-sectional view of a concrete slab beam reinforcing structure of a single locally reinforced bottom reinforcing layer according to an embodiment of the present invention. In the figure b1The width of the concrete slab beam and the top concrete integrated layer before reinforcement; b2The total width of the bottom reinforcement layer; in this example, bi＝2*b2I.e. a width of the sole of a single local reinforcement of about 0.5 times.
Fig. 1(c) is a schematic cross-sectional view of a reinforced structure of a concrete slab beam in which a bottom reinforcing layer is three local reinforcements according to an embodiment of the present invention. In the figure b1The width of the concrete slab beam and the top concrete integrated layer before reinforcement; b2The total width of the bottom reinforcement layer;in this embodiment, n is 3.
FIG. 2(a) shows a reinforced concrete slab beam structure in which the bottom reinforcing layer of the high-toughness material of the embodiment of the present invention is a single local reinforcementAnd (3) a structural shear bearing capacity calculation method decomposition schematic diagram. Wherein h is1For the height of the concrete slab beam before reinforcement; h is2The height of the bottom reinforcement layer; h is3The height of the top concrete integrated layer.
Fig. 2(b) is a decomposition schematic diagram of the method for calculating the shear-resistant bearing capacity of the reinforced concrete plate beam structure in which the bottom reinforcing layer of the high-toughness material is three local reinforcements in the embodiment of the present invention. Wherein h is1For the height of the concrete slab beam before reinforcement; h is2The height of the bottom reinforcement layer; h is3The height of the top concrete integrated layer.
When the design value of the tensile strength of the bottom reinforcing layer 3 is less than or equal to 20MP and the thickness of the bottom reinforcing layer is more than or equal to 40mm, reinforcing mesh sheets with the diameter of 8mm and the distance of 100-150 mm are arranged in the middle of the bottom reinforcing layer in the thickness direction.
Further, the bottom reinforcing layer 3 may be Modified Polymer Concrete (MPC) with a thickness of 30-50 mm or a steel plate with a thickness of 8-16 mm.
The shear-resistant bearing capacity calculation method of the sandwich-type top and bottom plate shear-resistant reinforced concrete plate beam structure comprises the following steps:
in the formula (I), the compound is shown in the specification,
VRthe total shear bearing capacity of the reinforced concrete slab beam structure;
α1、α2、α3-influence coefficients of different types of beams;
b1the width of the concrete slab beam and the top concrete integrated layer before reinforcement;
b2-the total width of the bottom reinforcement layer;
h1-the height of the concrete slab beam before reinforcement;
h2-the height of the bottom reinforcement layer;
h3-height of top concrete integrated layer;
beta-the compressive strength enhancement coefficient of the top concrete integrated layer;
P1the reinforcement distribution percentage of the longitudinal tensile steel bars in the inclined section of the concrete plate beam before reinforcement;
P2the bottom reinforcing layer is equivalent to the reinforcement distribution percentage of the longitudinal tension steel bar in the oblique section;
fcu，k-the standard value of the concrete compressive strength (MPa) of the concrete slab beam before reinforcement;
ftop, k-a standard value for the concrete compressive strength (MPa) of the top concrete integrated layer;
fbottom-design value of tensile strength (MPa) of the bottom reinforcement layer;
ρsvthe reinforcement ratio of the stirrup in the inclined cross section is calculated;
fsv-design value of tensile strength (MPa) of stirrup;
fs-design value of tensile strength (MPa) of steel bar.
Preferably, among the sandwich type top bottom plate shear reinforcement's concrete slab beam structure, can also increase the wholeness ability through the mode of bar planting 4 between top concrete wholeization layer 2, the concrete slab beam 1, bar planting 4 is 300 ~ 500mm along the roof beam axis direction interval, is 200 ~ 300mm along the perpendicular bridge axis direction interval of roof beam, and the diameter is 8 ~ 12 mm.
Further preferably, the concrete on the top and bottom surfaces of the concrete slab beam 1 needs to be roughened, so as to expose hard concrete coarse aggregate, and the treatment thickness is generally 10-20 mm.
So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", etc., used in the embodiments are only directions referring to the drawings, and are not intended to limit the protection scope of the present invention. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Unless otherwise indicated, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by the present invention. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". Generally, the expression is meant to encompass variations of ± 10% in some embodiments, 5% in some embodiments, 1% in some embodiments, 0.5% in some embodiments by the specified amount.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Also in the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a sandwich type top bottom plate shear reinforcement's concrete slab beam structure which characterized in that includes:
a concrete slab beam;
the bottom surface of the top concrete integrated layer is fixedly connected with the top surface of the concrete plate girder;
and the top surface of the bottom reinforcing layer is fixedly connected with the bottom surface of the concrete plate beam.
2. The concrete plate girder structure of claim 1, wherein the top concrete integrated layer is reinforced on the top surface of the concrete plate girder, has a thickness of 50-150 mm, and has a standard value of compressive strength of not less than 60 MPa.
3. The concrete plate girder structure according to claim 2, further comprising:
the reinforcing bar net piece, the reinforcing bar net piece sets up in the middle of the top concrete integration layer along the length direction level of roof beam, reinforcing bar net piece diameter is 8 ~ 12mm, with horizontal vertical 100 ~ 150 mm's interval set up horizontally in the intermediate position of top concrete integration layer thickness direction.
4. The concrete plate girder structure of claim 1, wherein the bottom reinforcing layer is reinforced on the bottom surface of the concrete plate girder along the length direction of the girder in the entire width or in part, the thickness is 8-50 mm, and the design value of the tensile strength is not less than 15 MPa.
5. The concrete plate beam structure of claim 4, wherein when the design value of the tensile strength of the bottom reinforcing layer is not more than 20MP and the thickness of the bottom reinforcing layer is not less than 40mm, reinforcing mesh sheets with the diameter of 8mm and the distance of 100-150 mm are arranged in the middle of the bottom reinforcing layer in the thickness direction.
6. The concrete plate girder structure according to claim 4,
the bottom reinforcing layer is made of modified polymer concrete with the thickness of 30-50 mm or a steel plate with the thickness of 8-16 mm.
7. The concrete plate girder structure according to claim 1, further comprising:
the longitudinal steel bars are horizontally arranged in the concrete slab beam along the length direction of the beam;
the stirrups are vertically arranged in the concrete plate girder.
8. The concrete plate girder structure according to claim 1, further comprising:
the bar planting, the bar planting sets up vertically between the top surface of the bottom surface on top concrete wholeization layer and concrete slab roof beam, the bar planting is 300 ~ 500mm along roof beam length direction interval, is 200 ~ 300mm along the roof beam transverse direction interval, and the diameter is 8 ~ 12 mm.
9. The concrete plate girder structure of claim 1, wherein concrete on the top and bottom surfaces of the concrete plate girder is chiseled to expose coarse concrete aggregate, and the thickness of the treatment is 10 to 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920187667.5U CN209907232U (en) | 2019-02-02 | 2019-02-02 | Sandwich type top and bottom plate shear-strengthening concrete slab beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920187667.5U CN209907232U (en) | 2019-02-02 | 2019-02-02 | Sandwich type top and bottom plate shear-strengthening concrete slab beam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209907232U true CN209907232U (en) | 2020-01-07 |
Family
ID=69030227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920187667.5U Active CN209907232U (en) | 2019-02-02 | 2019-02-02 | Sandwich type top and bottom plate shear-strengthening concrete slab beam structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209907232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706854A (en) * | 2019-02-02 | 2019-05-03 | 中交公路长大桥建设国家工程研究中心有限公司 | A kind of concrete slab girder construction of sandwich type roof and floor Shear Strengthening |
-
2019
- 2019-02-02 CN CN201920187667.5U patent/CN209907232U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706854A (en) * | 2019-02-02 | 2019-05-03 | 中交公路长大桥建设国家工程研究中心有限公司 | A kind of concrete slab girder construction of sandwich type roof and floor Shear Strengthening |
| CN109706854B (en) * | 2019-02-02 | 2024-02-02 | 中交公路长大桥建设国家工程研究中心有限公司 | Sandwich type top and bottom plate shear-resistant reinforced concrete slab beam structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103696355B (en) | The light-duty combined bridge structure of a kind of superhigh tenacity concrete slab-girder steel | |
| CN110847007A (en) | Section steel-concrete composite beam hogging moment area structure based on high-performance material | |
| CN102121289A (en) | Ultrahigh-strength and ultrathin bottom board for laminated slab and production method thereof | |
| CN108589969B (en) | Combined assembly type shear wall with vertical ECC energy consumption belt and manufacturing method thereof | |
| CN201972287U (en) | Ultrathin bottom plate with superhigh strength for lamination board | |
| CN112227199B (en) | Toughness combined bridge deck plate composed of cold-bending Z-shaped steel | |
| CN108532810A (en) | A kind of recycled concrete superposed composite floor of steel plate- | |
| CN209907232U (en) | Sandwich type top and bottom plate shear-strengthening concrete slab beam structure | |
| CN208219952U (en) | A kind of recycled concrete superposed composite floor of steel plate- | |
| CN107447676B (en) | Prefabricated construction method of steel-ultra-high performance concrete composite beam based on folded steel plate closed ribs | |
| CN107620254A (en) | Main span span centre region uses the hybrid combining beam bridge of steel lightweight concrete | |
| CN102828578A (en) | Bolt-connected assembling anti-cracking anti-seepage permanent cylinder shuttering | |
| CN207958968U (en) | A kind of ultra-high performance concrete and regular reinforcement concrete combination beam | |
| CN110409712A (en) | Prestressing force answers material-ultra-high performance concrete combination beam | |
| CN109898699A (en) | A kind of fabricated ripple type steel plate shear wall structure and its construction method | |
| CN110056117A (en) | The hollow hardened structure of FRP profile marine sand concrete of corrugated surface | |
| CN109706854B (en) | Sandwich type top and bottom plate shear-resistant reinforced concrete slab beam structure | |
| CN207537865U (en) | Main span span centre region uses the hybrid combining beam bridge of steel-lightweight concrete | |
| CN112482813A (en) | FRP/ECC permeable bidirectional reinforced concrete bidirectional slab capable of reinforcing damaged steel bar in two directions and preparation method thereof | |
| CN112921802A (en) | Profiled steel sheet-ultra-high toughness concrete combined bridge deck | |
| CN112878192A (en) | Assembled steel-ultra-high toughness concrete combined bridge deck | |
| CN112627572A (en) | One-way FRP grid/ECC permeation type reinforced concrete beam for reinforcing damage and preparation method thereof | |
| CN218059914U (en) | Reinforcement ECC-reinforced recycled concrete composite bridge deck | |
| CN106193288B (en) | A kind of precast concrete node pouring ECC layers | |
| CN110777680A (en) | Method for reinforcing, lifting and transforming beam bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |