CN215906555U - Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area - Google Patents
Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area Download PDFInfo
- Publication number
- CN215906555U CN215906555U CN202120076816.8U CN202120076816U CN215906555U CN 215906555 U CN215906555 U CN 215906555U CN 202120076816 U CN202120076816 U CN 202120076816U CN 215906555 U CN215906555 U CN 215906555U
- Authority
- CN
- China
- Prior art keywords
- bridge deck
- bridge
- wood
- connecting plate
- shcc
- 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
Abstract
The utility model belongs to the field of bridge structure construction, and particularly relates to a structure of a simply supported to continuous fulcrum hogging moment area of a wood-concrete composite beam bridge.
Description
Technical Field
The utility model relates to the field of bridge structure construction, in particular to a structure of a simply supported variable continuous fulcrum hogging moment area of a wood-concrete composite beam bridge.
Background
The bridge deck continuous simply-supported girder bridge is widely applied to the construction of urban viaducts due to the characteristics of convenient construction, simple stress and the like. The wood-concrete combined simply supported beam fully utilizes the tensile property of wood and the compression property of concrete, but the simply supported beam bridge is influenced by the expansion joint, so that the running performance and durability are poor, the maintenance cost is high, and therefore the wood-concrete combined simply supported beam bridge deck needs to be continuously seamless. However, when the bridge surface of the two-span or multi-span simply supported beam is continuous, a negative bending moment appears at the lower fulcrum under the action of load, and the low bending-tension performance of the concrete does not meet the structural stress requirement and is easy to crack under tension. For a general reinforced concrete structure, steel bars or even prestressed tendons are usually configured in a pivot hogging moment area to resist bending and pulling effects, the reinforced concrete structure has large self weight, concrete is a heterogeneous material, and under the action of temperature load, cracking risks exist, and the stress of a main beam and the durability of the structure are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the structure solves the problem that the bridge deck is discontinuous due to the arrangement of the expansion device because the large longitudinal deformation is generated under the load action of temperature and the like in a two-span or multi-span wood-concrete combined simple-supported beam bridge (L is less than or equal to 200m) in the prior art, and provides the structure of the hogging moment area for changing the simple support of the wood-concrete combined beam bridge into the continuous pivot.
According to the structure of the simply supported variable continuous fulcrum hogging moment area of the wood-concrete composite beam bridge, the high-ductility concrete (SHCC) bridge deck connecting plate structure is adopted in the fulcrum hogging moment area, the stress of hogging moment and the driving performance of vehicles are improved, the durability of the bridge structure is improved, the design and construction are simple and convenient, and the later maintenance cost of the bridge can be reduced.
The purpose of the utility model can be realized by the following technical scheme: a structure of a wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area comprises: a two-span or multi-span simply supported structure; the self-adhesive compressible sealing material comprises a wood beam, a pier, a support, an SHCC bridge deck connecting plate, reinforcing steel bars in the connecting plate, a synthetic pressure base plate, a self-adhesive compressible sealing material, reinforcing steel bars in a bridge deck, a wood-concrete shear connecting piece and a bridge deck; wherein, SHCC bridge deck connecting plates are arranged at two adjacent bridge span ends of the wood-concrete combined simply-supported girder bridge; the bridge pier is provided with a support, the support is loaded with a wood beam, and the SHCC bridge deck connecting plate is formed to connect bridge deck plates of two adjacent wood beams; the SHCC bridge deck connecting plate is arranged in a tension area at the upper edge of the bridge deck, and on the upper side of the shear connecting piece, the bridge deck and the wood beam form a whole through the shear connecting piece to jointly participate in stress.
On the upper side of the shear connector, the bridge deck plates of adjacent wood beams are connected with the bridge deck plate internal reinforcing steel bars of the pre-embedded bridge deck plates through connecting plate internal reinforcing steel bars, so that the SHCC bridge deck connecting plate is connected with the two adjacent bridge deck plates into a whole; a synthetic pressure base plate is arranged at the bottom of the SHCC bridge deck connecting plate to form an unbonded area; the bottom of the composite pressure pad and between two adjacent bridge decks and two adjacent wood beams are filled with a self-adhesive compressible sealing material.
Wherein, the support adopts a sliding support.
The self-adhesive compressible sealing material consists of halogenated butyl rubber, saturated polyisobutylene, butyl rubber, isocyanate, bentonite and active light calcium carbonate; and moreover, a low-modulus sealant is adopted on a contact surface of the SHCC bridge deck connecting plate, and a high-modulus sealant is adopted on a contact surface of the SHCC bridge deck connecting plate and a bridge deck plate.
The bridge deck comprises a two-span or multi-span simply supported structure (L is less than or equal to 200m), an SHCC bridge deck connecting plate and a wood-concrete shear connector, wherein the SHCC connecting plate is arranged in a tension area at the upper edge of a bridge deck, no or a small amount of reinforcements can be arranged in the connecting plate, the length of the connecting plate is 2-8 m (determined according to the length and the stress performance of a connected bridge span), and the SHCC bridge deck connecting plate and a wood beam form an integral joint stress through the shear connector, so that the continuous and seamless bridge deck is realized. The bottom of the SHCC bridge deck connecting plate is padded with the synthetic pressure base plate to form an unbonded area, so that the rigidity of the structure is increased, the stress of the structure is optimized, the relative movement of adjacent wood beams is prevented from being damaged, the connecting plate can be prevented from being damaged by water and other harmful substances, an adhesive compressible sealing material is stuffed between two adjacent beam ends, and the longitudinal deformation between beam bodies is self-adaptive.
By adopting the technical scheme, the SHCC bridge deck connecting plate structure eliminates the telescopic device of the wood-concrete combined simply-supported bridge, realizes the continuous change of the simple support of the wood-concrete combined bridge with medium and small spans, reduces the maintenance and replacement cost of the telescopic device in the later period, improves the running performance of the wood-concrete combined bridge, improves the durability of the structure, and has the advantages of simple design, convenient construction and huge social benefit. The utility model can be used for not only reconstructing the old bridge but also constructing the new bridge, and has strong practicability and wide application range. The utility model is particularly suitable for the seamless structure of the bridge deck of the medium-small span wood-concrete composite beam bridge.
Drawings
FIG. 1 is a schematic structural view of an SHCC bridge deck connecting plate at a road and bridge junction according to the present invention;
reference numbers in the figures:
the method comprises the following steps of 1-wood beam, 2-pier, 3-support, 4-SHCC bridge deck connecting plate, 5-connecting plate internal reinforcing steel bar, 6-synthetic pressure pad, 7-self-adhesive compressible sealing material, 8-bridge deck internal reinforcing steel bar, 9-wood-concrete shear connecting piece and 10-bridge deck.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
FIG. 1 is a structural diagram of a hogging moment zone structure of a wood-concrete composite beam bridge with a simple support and a continuous pivot and a SHCC bridge deck connecting plate at a bridge deck expansion joint, as shown in the figure,
a structure of a wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area comprises:
a two-span or multi-span simply supported structure; the self-adhesive composite bridge comprises a wood beam 1, piers 2, supports 3, SHCC bridge deck connecting plates 4, connecting plate internal reinforcing steel bars 5, a synthetic pressure base plate 6, self-adhesive compressible sealing materials 7, bridge deck internal reinforcing steel bars 8, a wood-concrete shear connecting piece 9 and a bridge deck 10;
wherein, SHCC bridge deck connecting plates 4 are arranged at two adjacent bridge span ends of the wood-concrete combined simply-supported girder bridge;
the bridge pier 2 is provided with a support 3, the support 3 is loaded with a wood beam 1, and an SHCC bridge deck connecting plate 4 is formed to connect bridge deck plates 10 of two adjacent wood beams 1;
the SHCC bridge deck connecting plate 4 is arranged in a tension area at the upper edge of a bridge deck 10, and on the upper side of a shear connecting piece 9, the bridge deck 10 and the wood beam 1 form a whole through the shear connecting piece 9 to jointly participate in stress;
on the upper side of the shear connector 9, the bridge deck slab 10 of the adjacent wood beam 1 is connected with the bridge deck slab internal steel bars 8 of the pre-embedded bridge deck slab 10 through the connecting plate internal steel bars 5, so that the SHCC bridge deck connecting plate 4 is connected with the two adjacent bridge deck slabs 10 into a whole; a synthetic pressure base plate 6 is arranged at the bottom of the SHCC bridge deck connecting plate 4 to form an unbonded area; a self-adhesive compressible sealing material 7 is packed in the bottom of the composite pressure pad 6 and between two adjacent bridge decks 10 and two adjacent wood beams.
Wherein, the support 3 adopts a sliding support.
Wherein, the self-adhesive compressible sealing material 7 consists of halogenated butyl rubber, saturated polyisobutylene, butyl rubber, isocyanate, bentonite and active light calcium carbonate; and in the self-adhesive compressible sealing material 7, a low-modulus sealant is adopted at the contact surface with the SHCC bridge deck connecting plate 4, and a high-modulus sealant is adopted at the contact surface with the bridge deck 10.
Before the SHCC bridge floor connecting plate 4 is poured, the contact surface of a bridge deck 10 connected with the SHCC bridge floor connecting plate 4 is roughened, a synthetic pressure base plate 6 is arranged at the bottom of the SHCC bridge floor connecting plate 4, a bonding-free area is formed, and the stress is optimized.
Wherein, the chloroprene rubber: has good cohesiveness, waterproofness, shock resistance and compressibility, and isocyanate: as a sealant, the sealant ensures the sealing property and moderate tensile modulus and elasticity; bentonite: as a thixotropic agent, the thixotropy is ensured; active light calcium: as a reinforcing agent, has good reinforcing effect; the effects of good bonding, sealing and water proofing are achieved, and the service life of the wood-concrete combined simply supported beam can be effectively prolonged.
Claims (1)
1. A structure of a wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area comprises:
a two-span or multi-span simply supported structure; the bridge deck comprises a wood beam (1), piers (2), supports (3), SHCC bridge deck connecting plates (4), connecting plate internal reinforcing steel bars (5), a synthetic pressure base plate (6), self-adhesive compressible sealing materials (7), bridge deck internal reinforcing steel bars (8), wood-concrete shear connectors (9) and bridge deck plates (10);
wherein, SHCC bridge deck connecting plates (4) are arranged at two adjacent bridge span ends of the wood-concrete combined simply-supported girder bridge;
the bridge pier (2) is provided with a support (3), the support (3) is loaded with a wood beam (1), and an SHCC bridge deck connecting plate (4) is formed to connect bridge deck plates (10) of two adjacent wood beams (1);
the method is characterized in that: the SHCC bridge deck connecting plate (4) is arranged in a tension area at the upper edge of a bridge deck (10), and on the upper side of a shear connecting piece (9), the bridge deck (10) and the wood beam (1) form a whole through the shear connecting piece (9) to jointly participate in stress;
on the upper side of the shear connector (9), the bridge deck plates (10) of adjacent wood beams (1) are connected with the bridge deck plate internal steel bars (8) of the pre-embedded bridge deck plates (10) through the connecting plate internal steel bars (5), so that the SHCC bridge deck connecting plate (4) is connected with the two adjacent bridge deck plates (10) into a whole; a synthetic pressure base plate (6) is arranged at the bottom of the SHCC bridge deck connecting plate (4) to form an unbonded area; self-adhesive compressible sealing materials (7) are filled at the bottom of the composite pressure pad (6) and between two adjacent bridge decks (10) and two adjacent wood beams;
and a contact surface between the self-adhesive compressible sealing material (7) and the SHCC bridge deck connecting plate (4) adopts low-modulus sealant, and a contact surface between the self-adhesive compressible sealing material and the bridge deck connecting plate (10) adopts high-modulus sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120076816.8U CN215906555U (en) | 2021-01-12 | 2021-01-12 | Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120076816.8U CN215906555U (en) | 2021-01-12 | 2021-01-12 | Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215906555U true CN215906555U (en) | 2022-02-25 |
Family
ID=80285391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120076816.8U Active CN215906555U (en) | 2021-01-12 | 2021-01-12 | Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215906555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117431828A (en) * | 2023-12-19 | 2024-01-23 | 北京新桥技术发展有限公司 | Bridge leveling layer, bridge and construction method |
-
2021
- 2021-01-12 CN CN202120076816.8U patent/CN215906555U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117431828A (en) * | 2023-12-19 | 2024-01-23 | 北京新桥技术发展有限公司 | Bridge leveling layer, bridge and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110130220B (en) | Novel concrete bridge surface continuous structure applied to beam bridge | |
| CN2477701Y (en) | Connecting structure of bridge having simple support varied as continuation | |
| CN215906555U (en) | Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area | |
| CN110258353A (en) | And of Varying Depth steel-concrete composite beams bridge construction technique with support | |
| CN112853912B (en) | Structure of wood-concrete composite beam bridge simply supported variable continuous fulcrum hogging moment area | |
| CN206916603U (en) | A kind of transverse prestress I-shaped box-beam structure | |
| CN111021227B (en) | Steel-concrete composite structure continuous box girder and manufacturing method thereof | |
| CN208748508U (en) | A kind of bridge abutment structure for jointless bridge | |
| CN201381470Y (en) | Assembled variable cross-section composite continuous bridge | |
| CN216640310U (en) | Transformation dangerous bridge transformation structure of T-shaped rigid frame system with hanging beam for common highway | |
| CN114370005B (en) | Construction method of long-life bridge deck pavement structure for preventing bridge deck cracks | |
| JPH02164902A (en) | Jointless multi-span slab bridge arranged by simple support | |
| CN111827140B (en) | Unbonded external transverse prestress reinforced hinge joint cracking damaged plate beam structure and method | |
| CN111764250A (en) | Steel truss web combined beam cable-stayed bridge | |
| CN110629670A (en) | Upper and lower steel plate sandwich type steel-concrete combined bridge deck structure and construction method | |
| CN201016155Y (en) | Semi-continuous girder bridge | |
| CN110644362A (en) | Combined bridge deck structure adopting hollow ultrahigh-performance concrete slab and construction method | |
| CN212452238U (en) | Steel truss web combined beam cable-stayed bridge | |
| CN216919966U (en) | Railway steel-concrete mixed continuous rigid frame bridge | |
| CN213978594U (en) | Steel-concrete-UHPC combined bridge deck | |
| CN217460271U (en) | Seamless steel bridge floor structure of bridge engineering | |
| CN219342817U (en) | New and old bridge piece together wide steel sheet seam structure | |
| CN2560670Y (en) | Assembled comb type brdige stretching apparatus | |
| JP3455204B2 (en) | Bridge reinforcement structure | |
| CN211228115U (en) | Upper and lower steel plate sandwich type steel-concrete combined bridge deck structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |