CN111663441A - Wave-mode plate base structure composite material for bearing surface of bridge and other large-scale structures - Google Patents
Wave-mode plate base structure composite material for bearing surface of bridge and other large-scale structures Download PDFInfo
- Publication number
- CN111663441A CN111663441A CN201910163775.3A CN201910163775A CN111663441A CN 111663441 A CN111663441 A CN 111663441A CN 201910163775 A CN201910163775 A CN 201910163775A CN 111663441 A CN111663441 A CN 111663441A
- Authority
- CN
- China
- Prior art keywords
- bearing surface
- top plate
- cavity
- based structural
- corrugated
- 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
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 45
- 238000003466 welding Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 239000011372 high-strength concrete Substances 0.000 claims 8
- 239000000945 filler Substances 0.000 claims 6
- 239000000203 mixture Substances 0.000 claims 3
- 239000002184 metal Substances 0.000 claims 2
- 206010016256 fatigue Diseases 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 14
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000284 resting effect Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 4
- 239000011384 asphalt concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a corrugated board base structure composite material for a structural bearing plane. Such corrugated board based structural composites are composed of one or more basic units comprising corrugated board; each basic unit is characterized in that a plate with a special designed microscopic shape and size is implanted between two specially selected plane or curved basic plates to form open or closed cavities which are arranged according to a rule; or other materials are filled in the open cavity according to the characteristics of the large structure and the load type; thereby fully utilizing the combination property of the materials and the structural characteristics of the cavity to achieve the best application benefits of high strength, high durability and light weight. When such board based structural composites are used as a paving covering, they are attached to the large structure in question by one or a combination of the following methods: the method comprises the following steps: riveting, welding, bolting, or simply resting on the bearing surface. When riveting, welding and bolt connection modes are used, the connection position is ensured not to become a secondary fatigue defect source.
Description
Technical Field
The invention relates to the technical field of structural design and bearing surface repair of bridges, houses and other large-scale steel structures, which can be directly applied to the design of bearing surfaces of the large-scale structures or used as a paving material to cover the bearing surfaces. One possible broader application is in the design, paving, or repair of bridge decks; in particular to the design, pavement or pavement repair of the orthotropic bridge deck of a large-span bridge. FIG. 1(a) is a construction orthogonal shaped steel box girder; FIG. 1(c) shows the cracks which are common in the top plate of the bridge surface of the orthogonal deformed steel box girder. Fig. 1(d) and (e) are the following two types of stress distributions [ 2 and 3 ] calculated by using the finite element model of the orthogonal deformed steel box girder bridge in fig. 1 (b).
The invention is a further innovation on the basis of the applicant U.S. patent [ 1 ]. Compared with [ 1 ], the novelty and originality of the invention are mainly embodied in the design of the basic plate shape and the cavity of the unit according to the bearing mode.
Background
The main considerations for large structure design are load bearing capacity and durability. Considering a point on the surface of a structural member, the stresses it is subjected to can be simply divided into two categories: stress generated by direct action on surface contact force, see fig. 1 (d); and (II) surface contact force and other part loads including the self weight of the structure, and the stress generated in the point is mainly expressed as the stress caused by bending moment, which is shown in figure 1 (e). For example, two persons at a distance stand on a bridge, and each person feels the contact pressure of the person and the bending moment stress caused by the weight of the other person and the bridge itself.
For large structures, the bending moment and the corresponding stress on the component caused by the weight of the component and the total load, i.e. the second type of stress, are the main considerations of current engineering design. For example, for orthogonal profiled steel box girders used for very large span bridges in recent decades, conventional specifications allow for ultra-thin (less than 12 mm) steel box girder slab designs to reduce their own weight. However, under long-term repeated impacts of vehicle wheels on the bridge deck, fatigue cracks caused by repeated contact loads occur in the welding seams of many bridge panels in the world or the peripheries of the welding seams. The hundred-meter long steel box girder cannot be replaced due to individual local cracks; continued crack propagation under vehicle loading can have catastrophic consequences; welding closed cracks can initiate new cracks around the weld, and thus bridge safety can generally only be ensured from improving the deck pavement. The traditional method is to cover concrete or epoxy resin on the bridge deck for paving. Because the characteristics of the material are greatly different from those of steel materials, the material is difficult to be tightly adhered to a steel bridge surface. Under the action of temperature change and vehicle wheel load, the pavement generally falls off after three to five years, and needs to be reprocessed. The invention relates to a novel bridge design, which improves a thickened steel box girder plate, and simultaneously discloses a plurality of inventions (1, 4-10) for improving the stress state of a running bridge deck by applying a composite material paving method and inventions, for example, the concept of protecting an orthogonal deformed steel box girder bridge deck by applying a design of overlapping a cavity composite material with a multi-time corrugated plate is introduced in the invention (1). However, some methods need to improve the strength, rigidity, corrosion resistance and fatigue resistance of the bridge and the connection part of the bridge and the steel box girder, which are related to the service life, because the service life of the bridge is 75 to 120 years according to the conventional design at present. In order to ensure the safe operation of the bridge, the composite material with the plate-based structure can be used as a one-time permanent paving material to repair and protect a bridge panel in operation; or directly applied to the design of the steel box girder, which is a further innovation on the basis of the U.S. patent [ 1 ] of the applicant of the invention. Compared with the structure [ 1 ], the novelty and originality of the invention are mainly embodied in the design of the connection mode of the cavity and the structural unit according to the characteristics of the wheel contact load and the bridge type structure, so that better mechanical and material properties are obtained.
Disclosure of Invention
Briefly described (I): a board-based structural composite material which can be used as a large-scale structural bearing surface or covered and paved by the bearing surface is provided. Large structures here refer to bridges and building structures, other steel structures on land, ships, and ocean platforms; by load-bearing surface is meant herein a surface plane or a curved surface where these structures bear the external load directly.
(II) the technical problem to be solved: the board-based structure composite material provided by the invention is applied to (a) enhance the conventional strength of the large-scale structure bearing surface, such as compression resistance, impact resistance and the like, and (b) improve the durability indexes of the large-scale structure bearing surface, such as fatigue resistance, wear resistance and the like; (c) the integral strength of the large-scale structure is enhanced; the board-based structure composite material has to meet the conventional strength indexes such as compression resistance and impact resistance and the durability indexes such as fatigue strength and wear resistance and also meets the additional rigidity and stability requirements of the structure of the board-based structure composite material.
(III) the technical scheme is as follows: in order to solve the problems, the board-based structure composite material provided by the invention is formed by compounding at least three types of the following eight types of material units according to specific design working condition requirements, wherein the eight types of material units are the wave-shaped board 3, the upper top board 4 and the lower top board 5 in the figure 2, an upper cavity filling material 7 for filling between the wave-shaped board 3 and the upper top board 4, an upper cavity rib 12 in the upper cavity, a lower cavity filling material 7 for filling between the wave-shaped board 3 and the lower top board 5 and a lower cavity rib 11 in the lower cavity. Further explanation is as follows:
(1) the thickness of the corrugated plate 3 is 1 to 18 mm, and the corrugation height is 4 to 120 mm; the upper top plate 4 and the lower top plate 5 are connected by welding seams 10 at two ends and spot welding 9 at the other two sides in the direction of repeated corrugation.
(2) The upper cavity filling material 7 and the lower cavity filling material 8 may be the same or different concrete or epoxy materials; its function is to ensure that the corrugated plate 3 does not exhibit local buckling when stressed.
(3) The upper cavity rib block 14 and the lower cavity rib block 15 are connected with the wave-shaped plate 3 through spot welding; its function is to ensure that the corrugated plate 3 does not exhibit local buckling when stressed.
(4) The conventional pavement 11 placed on the upper deck 4 is, for example, conventional asphalt concrete.
(5) Such board based structural composites can simply rest on the load bearing surface when they are covered as a pavement but without the need to simultaneously reinforce the strength and rigidity of the load bearing surface of the large structure covered.
(6) When such board based structural composites are used as a paving covering while at the same time reinforcing the strength and rigidity of the bearing surface of the large structure to be covered, each piece of board based structural composite is attached to the large structure in question by one or a combination of the following methods: the method comprises the following steps: riveting, welding and bolting. But riveting and bolting must be done on the load bearing panel; welding can cause localized material dissimilarity, e.g., material embrittlement in the heat affected zone; therefore, weakening of the load bearing surface structure is inevitable. In order to ensure that the joint adopting the method cannot become a secondary fatigue defect source, according to the analysis and test results of [ 2, 3 ], the selection conditions of the riveting, welding and bolt connecting position 12 are specified:
(i) the magnitude of dynamic load stress in any direction at the corresponding location of the structural load bearing panel must be less than 1/3 for the maximum magnitude of dynamic load stress to be borne by all sheets of material in the overall structural load bearing panel.
(ii) The average stress in any direction at the corresponding location of the structural load bearing panel must be less than 1/2, which is the maximum average stress borne by all of the material elements in the overall structural load bearing panel.
According to conventional bridge design specifications, such as [ 11-13 ], when condition (i) is satisfied, the fatigue life (dynamic load cycle) of the structural load bearing panel preformed hole or the welding position material unit is the cube of the fatigue life (bearable dynamic load cycle) of the load bearing panel peak force unit. According to the analysis and test results [ 2, 3 ], when the condition (ii) is met, the fatigue life of the material unit at the corresponding position of the reserved hole or the welding position can be improved by 50 percent. The two conditions ensure that secondary fatigue loss sensitive hot spots cannot be formed by drilling at corresponding positions of the structural bearing panel.
Drawings
FIG. 1: (a) an orthogonal special-shaped steel box girder example under construction; (b) a three-dimensional finite element model of an orthogonal special-shaped steel box girder bridge; (c) common cracks of a bridge deck top plate of the orthogonal deformed steel box girder; (d) stress distribution generated by direct action on surface contact force; (e) surface contact forces and other part loads, including the structure's own weight, cause stress distributions corresponding to bending moments.
FIG. 2: the basic construction of the board based structural composite material of the present invention; including the upper and lower cavity filling materials.
Method of implementation
The method comprises the following steps: the board base structure composite material is only composed of an upper top plate, a lower top plate and a corrugated plate
(1) The corrugated plate can be formed into a corrugated shape by cold pressing or hot pressing from a flat plate strip, or formed by a corrugating machine.
(2) Arranging a corrugated plate on the lower top plate, and arranging an upper top plate on the corrugated plate; are connected to each other by welding.
(3) Is arranged on the structure bearing surface.
(4) And the bearing panels are connected through bolts or welded or riveted structures according to the working condition requirements.
(5) Adding conventional pavement on the surface of the upper roof
The second method comprises the following steps: the board base structure composite material is only composed of an upper top plate, a lower top plate, a corrugated plate and upper and lower cavity rib blocks
(1) The corrugated strip may be formed from flat strip into a corrugated shape by cold or hot pressing, or by a corrugator.
(2) And spot welding the upper cavity rib block at the position corresponding to the corrugated plate according to the working condition requirement.
(3) And according to the working condition requirement, spot welding the lower cavity rib block at the position corresponding to the corrugated plate.
(4) Arranging a corrugated plate on the lower top plate, and arranging an upper top plate on the corrugated plate; are connected to each other by welding.
(5) Is arranged on the structure bearing surface.
(6) And the bearing panels are connected through bolts or welded or riveted structures according to the working condition requirements.
(7) Conventional pavement, such as asphalt concrete, is added to the surface of the upper roof.
The third method comprises the following steps: the board base structure composite material is only composed of an upper top board, a lower top board, a corrugated board, upper and lower cavity rib blocks and filling materials
According to the working condition, filling materials for the upper cavity are arranged in the residual space of the upper cavity after the step (2) is finished; then according to the working condition, filling materials for the lower cavity are arranged in the residual space of the lower cavity after the step (3) is finished
The method four comprises the following steps: the board base structure composite material is only composed of an upper top board, a lower top board, a corrugated board and an upper cavity and a lower cavity filling material
(1) The corrugated plate can be formed into a corrugated shape by cold pressing or hot pressing from a flat plate strip, or formed by a corrugating machine.
(2) The corrugated lath is arranged on a working platform with the same curvature as the bearing surface of the structure, and an upper cavity filling material is arranged in the upper cavity according to the working condition requirement
(3) Is connected with the upper top plate through spot welding; if necessary, the lower cavity is filled with the material after turning over.
(4) And is connected with the lower top plate through spot welding.
(5) Is arranged on the structure bearing surface.
(6) And the bearing panels are connected through bolts or welded or riveted structures according to the working condition requirements.
(7) Conventional pavement, such as asphalt concrete, is added to the surface of the upper roof.
The method fixes the reserved hole or welding position in the lower top plate and is determined according to the following criteria: (i) the magnitude of dynamic load stress in any direction at the corresponding location of the structural load bearing panel must be less than 1/3 for the maximum magnitude of dynamic load stress to be borne by all sheets of material in the overall structural load bearing panel. (ii) the average stress in any direction at the corresponding location of the structural load bearing panel must be less than 1/2 which is the maximum average stress borne by all of the material elements in the overall structural load bearing panel. According to the design specification [ 2 ] of the bridge, when the condition (i) is met, the fatigue life (dynamic load cycle number) of a material unit of a preformed hole or a welding position of a structural bearing panel is the cube of the fatigue life (bearable dynamic load cycle number) of a peak stress unit of the bearing panel. According to the analysis and test results [ 2 ], the fatigue life of the material unit at the corresponding position of the reserved hole or the welding can be improved by 50 percent when the condition (ii) is met. These two conditions ensure that secondary fatigue loss sensitive hot spots are not formed at the corresponding connection positions of the structural load-bearing panel.
Reference to the literature
【1】 US patent US9222260B1, priority date 2009, 4/10
【2】 Su Hao (Haosu), Closure to "I35W Bridge Collapse" by S.Hao, ASCE J.of Bridge Engineering, V.18(9), 2013, pp.929-930.
【3】 Su Hao (Structural Fatisue Damage Evaluation in Bridges and Orthotropic Decks,3RD ORTHOTROPIC BRIDGE CONFERENCE PROCEEDINGS, June 26-28,2013, Sacramento, California).
【4】 French patent FR2411922B1 priority date 1978 12-15
【5】 Canadian patent CA1074061A priority date 1983-26/5
【6】 US patent 5342141, priority date 1994, 8/30
【7】 Korean patent KR20030097049A, priority date 2003, 12/31/2003
【8】 Priority date of Chinese patent CN103614964A in 2013, 12 month and 10 day
【9】 US patent US 8,888,941B 2 priority date 2013, 6/month 4
【10】 Chinese patent CNCN108457182A priority date 2018, 5 month, 18
【11】 American bridge design specifications: AASHTO LRFD Bridge Design Specification 2016
【12】 Japanese bridge design code: road indicates a square, 26360, commented upon 2012
【13】 European code: designing the fatigue of the bridge: eurocode 3(2005) Design of SteelStructure-Part 1-9 Fatigue, EN 1993-1-9
Claims (10)
1. A board-based structural composite material which can be used as a large-scale structural bearing surface or covered and paved by the bearing surface is provided. The large structures refer to bridges and building structures, other steel structures on land, ships, and ocean working platforms; the bearing surface refers to a surface plane or a curved surface of the structures which directly bear external loads. The board-based structure composite material is characterized in that:
-its composition comprises at least one corrugated-shaped sheet comprising a number of repeating wave-shaped units; the wave pattern of each unit comprises a straight line section and a curve section connecting the straight line section;
-its composition comprises a lower ceiling; the corrugated shaped plate is disposed above the lower top plate; a lower cavity is enclosed by one corrugation of the corrugated-shaped plate and the lower top plate;
-its composition comprises an upper top plate, placed above said corrugated shaped plate; a corrugation of the corrugated plate and the upper top plate enclose an upper cavity;
-the upper top plate, the lower top plate, and the corrugated shaped plate are connected to each other by welding;
-over the large structure bearing surface.
2. The board based structural composite of claim 1 wherein at least one of said lower cavities has at least one lower cavity rib block embedded therein; the lower cavity rib block is made of metal or epoxy resin or composite material including high strength concrete.
3. The board based structural composite of claim 1 wherein at least one upper cavity rib block is disposed within at least one of said upper cavities; the upper cavity rib block is made of metal or epoxy resin or composite material including high-strength concrete.
4. The board based structural composite of claim 1, wherein at least one of said lower cavities is filled with a lower cavity filler material; the lower cavity filling material is epoxy resin or high-strength concrete.
5. The board based structural composite of claim 1 wherein at least one of said upper cavities is filled with an upper cavity filler material; the upper cavity filling material is epoxy resin or high-strength concrete.
6. The board based structural composite of claim 2, wherein a lower cavity filler material is disposed in a remaining space after the lower cavity rib block is disposed in at least one of the lower cavities; the lower cavity filling material is epoxy resin or high-strength concrete.
7. The board based structural composite of claim 3 wherein the remaining space after the upper cavity rib block is placed in at least one of said upper cavities is filled with an upper cavity filler material; the upper cavity filling material is epoxy resin or high-strength concrete.
8. The board based structural composite of claim 2 wherein at least one of said upper cavities is filled with an upper cavity filler material; the upper cavity filling material is epoxy resin or high-strength concrete.
9. The board based structural composite of claim 8, wherein a lower cavity filler material is disposed in a remaining space after the lower cavity rib block is disposed in at least one of the lower cavities; the lower cavity filling material is epoxy resin or high-strength concrete.
10. The board based structural composite material according to claim 2, wherein a prepared hole is provided at a corresponding position of the large structure bearing surface and the lower top plate; the stress level of the reserved hole at the corresponding position of the bearing surface of the large structure is less than one third of the highest peak stress of all material units of the bearing panel; the large-scale structure bearing surface is connected with the lower top plate through a bolt passing through a preformed hole; the corrugated batten grids are connected with the lower top plate through welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163775.3A CN111663441A (en) | 2019-03-06 | 2019-03-06 | Wave-mode plate base structure composite material for bearing surface of bridge and other large-scale structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163775.3A CN111663441A (en) | 2019-03-06 | 2019-03-06 | Wave-mode plate base structure composite material for bearing surface of bridge and other large-scale structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111663441A true CN111663441A (en) | 2020-09-15 |
Family
ID=72381215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910163775.3A Pending CN111663441A (en) | 2019-03-06 | 2019-03-06 | Wave-mode plate base structure composite material for bearing surface of bridge and other large-scale structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111663441A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000213094A (en) * | 1999-01-22 | 2000-08-02 | Ishikawajima Harima Heavy Ind Co Ltd | Sandwich composite floor slab |
| KR200391219Y1 (en) * | 2005-03-24 | 2005-08-22 | 동양종합건업 주식회사 | Corrugated steel plate reinforced by rib |
| CN203805409U (en) * | 2014-04-24 | 2014-09-03 | 江苏建筑职业技术学院 | Corrugated web concrete composite sandwich bearing plate |
| CN204125836U (en) * | 2014-10-16 | 2015-01-28 | 刘娟 | A kind of road surface steel plate of combined bridge |
| CN108457182A (en) * | 2018-05-18 | 2018-08-28 | 中山职业技术学院 | A kind of cross bridge floor board and its construction technology |
-
2019
- 2019-03-06 CN CN201910163775.3A patent/CN111663441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000213094A (en) * | 1999-01-22 | 2000-08-02 | Ishikawajima Harima Heavy Ind Co Ltd | Sandwich composite floor slab |
| KR200391219Y1 (en) * | 2005-03-24 | 2005-08-22 | 동양종합건업 주식회사 | Corrugated steel plate reinforced by rib |
| CN203805409U (en) * | 2014-04-24 | 2014-09-03 | 江苏建筑职业技术学院 | Corrugated web concrete composite sandwich bearing plate |
| CN204125836U (en) * | 2014-10-16 | 2015-01-28 | 刘娟 | A kind of road surface steel plate of combined bridge |
| CN108457182A (en) * | 2018-05-18 | 2018-08-28 | 中山职业技术学院 | A kind of cross bridge floor board and its construction technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109137718B (en) | Light steel-coarse aggregate active powder concrete composite beam structure | |
| CA2561453A1 (en) | Fiber reinforced thermoplastic composite panel | |
| CN103614964A (en) | Steel box beam orthotropic deck slab | |
| CN110424241B (en) | Rectangular corrugated plate base structure composite material for bearing surfaces of bridges and other large structures | |
| Kennedy et al. | The sandwich plate system for bridge decks | |
| Chavel | Steel bridge design handbook: Bridge deck design | |
| CN104963276B (en) | A kind of steel bamboo combined box beam | |
| Kang et al. | Punching and lateral cyclic behavior of slab-column connections with shear bands | |
| CN212656113U (en) | Steel box girder bridge deck pavement structure and suspension bridge | |
| CN110983967B (en) | Bridge deck continuous process | |
| CN111893878A (en) | Steel box girder bridge deck pavement structure and construction method | |
| CN111663441A (en) | Wave-mode plate base structure composite material for bearing surface of bridge and other large-scale structures | |
| CN109162211B (en) | Reinforcing structure for bridge hinge joint | |
| CN111663440A (en) | Board base structure composite material for bearing surfaces of bridges and other large structures | |
| CN109853377A (en) | Using the continuously coupled structure of the bridge floor of ultra-high performance concrete and its construction method | |
| CN104294736A (en) | Lightweight composite pavement | |
| CN212582397U (en) | Combined beam of steel, common concrete and ultrahigh-performance concrete | |
| Siwowski et al. | A Polish approach to FRP bridges | |
| CN209941495U (en) | Bridge deck assembling unit and bridge deck structure applying same | |
| Siwowski et al. | Development, testing and construction of the hybrid FRP composite–concrete road bridge | |
| CN112853916A (en) | Assembled waffle bridge panel combined box girder structure and construction method thereof | |
| Vincent et al. | A new orthotropic bridge deck: Design, fabrication and construction of the Shenley Bridge incorporating an SPS orthotropic bridge deck | |
| Uang et al. | Performance evaluation of shear links and orthotropic bridge deck panels for the new san francisco–oakland bay bridge | |
| CN211897846U (en) | Bridge deck continuous structure | |
| CN220183795U (en) | Replaceable and repairable anti-collision shock-resistant pier with multiple defense lines |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201130 Address after: A109, building 1, No. 12, shangdixin Road, Haidian District, Beijing 100085 Applicant after: Hao Su Applicant after: RESEARCH INSTITUTE OF HIGHWAY MINISTRY OF TRANSPORT Address before: A109, building 1, No. 12, shangdixin Road, Haidian District, Beijing 100085 Applicant before: Hao Su |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hao Su Inventor after: Yan Erhu Inventor before: Hao Su |