CN219586544U - Simply supported T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars - Google Patents
Simply supported T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars Download PDFInfo
- Publication number
- CN219586544U CN219586544U CN202320160506.3U CN202320160506U CN219586544U CN 219586544 U CN219586544 U CN 219586544U CN 202320160506 U CN202320160506 U CN 202320160506U CN 219586544 U CN219586544 U CN 219586544U
- Authority
- CN
- China
- Prior art keywords
- section
- beam web
- shaped reinforcing
- reinforcing layer
- uhpc
- 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
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model discloses a simple support T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars, which comprises a U-shaped reinforcing layer arranged outside a T beam web, and steel bars planted in connection with the T beam web and the U-shaped reinforcing layer, wherein the U-shaped reinforcing layer comprises a steel bar cage and ultra-high performance concrete poured outside the steel bar cage, the U-shaped reinforcing layer is divided into 3 sections along the length direction, the middle part is a midspan section, the two ends of the midspan section are support sections, the cross-section size of the midspan section is unchanged, and the cross-section size of the support sections is changed. The variable cross-section reinforcing structure of the simply supported T beam web based on the UHPC and the high-strength steel bars has the advantages of greatly improving the bending resistance and the shearing resistance of the T beam bridge, being excellent in impermeability, having the characteristics of simple structure, safety, reliability, good durability and the like, and meeting the demands of production and life.
Description
Technical Field
The utility model relates to the technical field of bridge reinforcement, in particular to a simple support T-shaped beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars.
Background
The Ultra-high performance concrete is UHPC (Ultra-High Performance Concrete) for short, is a novel material, and besides common cement, sand stone and water, high-activity materials such as a water reducing agent, silicon powder and the like are additionally added, so that the strength of the concrete is greatly improved, the concrete has Ultra-high strength and excellent durability due to high compactness, and in addition, the working performance is good, and different engineering requirements are met. The T-beam bridge rises from the seventh eighties of the last century, the number of construction increases year by year, the T-beam bridge becomes one of the most widely applied bridge types in China, diseases are gradually exposed after the T-beam bridge is used for decades, wherein the transverse cracks of the beam bottom are most obvious due to the insufficient bearing capacity, the deformation and the cracks of the beam body exceed the normal use states, so that some old bridges cannot meet the modern traffic requirements, and if the old bridges are rebuilt, huge economic pressure is brought to local governments, and traffic is seriously influenced.
Therefore, the old bridge reinforcement is a mode commonly adopted at present, however, the traditional old bridge reinforcement technology is complex in structure, poor in durability and poor in reinforcement effect, and the technical problem that the traditional old bridge reinforcement technology is complex in structure, poor in durability and poor in reinforcement effect is solved.
Disclosure of Invention
The utility model aims to provide a simple support T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars, which utilizes the excellent performances of the UHPC and the high-strength steel bars to reinforce an old T beam bridge, solves the technical problems of complex reinforcing structure, poor durability and poor effect of the old bridge, has the characteristics of simple structure, convenient construction, safety, reliability and good durability, and meets the demands of production and life.
The variable cross-section reinforcing structure of the simply supported T-beam web based on the UHPC and the high-strength steel bar comprises a U-shaped reinforcing layer arranged outside the T-beam web and a steel bar planting connected with the T-beam web and the U-shaped reinforcing layer;
the U-shaped reinforcing layer comprises a steel reinforcement cage and ultra-high performance concrete poured outside the steel reinforcement cage, the U-shaped reinforcing layer is divided into 3 sections along the length direction, the middle part of the U-shaped reinforcing layer is a midspan section, two ends of the midspan section are support sections, the cross section size of the midspan section is unchanged, and the cross section size of the support section is changed.
The steel bar planting comprises a plurality of horizontal steel bar planting holes penetrating through the side parts of the T beam web plates and a plurality of vertical steel bar planting holes penetrating through the bottom parts of the T beam web plates;
the steel reinforcement cage comprises an HRB600 high-strength longitudinal rib arranged at the bottom of the T beam web along the length direction of the T beam, liang Cejian force ribs which are parallel to the HRB600 high-strength longitudinal rib and arranged at two sides of the T beam web, and an opening stirrup connected between the HRB600 high-strength longitudinal rib and the Liang Cejian force rib;
the bar planting is connected with the reinforcement cage in a binding way.
The horizontal bar planting and the vertical bar planting are respectively arranged at equal intervals along the length direction of the T-beam web, and two ends of the horizontal bar planting protrude out of the T-beam web and are connected with the Liang Cejian-force bar in a binding mode.
The length of the midsection is one half of the length of the U-shaped reinforcing layer, the length of the supporting section is one fourth of the length of the U-shaped reinforcing layer, and the section height of the supporting section gradually increases from the end of the midsection to the end of the U-shaped reinforcing layer.
The depth of the vertical bar planting in the T beam web is not smaller than 15 times of the bar planting diameter, the horizontal bar planting is arranged above the main bar in the T beam web, and the vertical distance from the main bar is not smaller than 20mm.
The thickness of the U-shaped reinforcing layers on two sides of the T-beam web is not smaller than 40mm, and the thickness of the U-shaped reinforcing layer at the bottom of the T-beam web is not smaller than 60mm.
The thickness of the protective layer of the Liang Cejian force rib (5) is not less than 2cm, and the thickness of the protective layers at two ends of the horizontal planting rib (7) is 1.5 cm-2cm.
Compared with the prior art, the utility model has the following advantages:
the ultra-high performance concrete (UHPC) is adopted to reinforce the T-beam bridge web, the U-shaped reinforcing layer has higher strength, better seepage resistance and durability, material saving and good working performance, can effectively improve the crack at the bottom of the beam, strengthen the crack resistance and tensile property of the beam body, improve the rigidity of the main beam, effectively protect the reinforcing steel bars in the reinforcing layer from being corroded, improve the bearing capacity and durability of the bridge, and have higher construction speed;
the U-shaped reinforcing layer adopts a design with a variable cross section, and the two sides and the bottom of the T-beam web are thickened by increasing the cross section of the U-shaped reinforcing layer, so that the stress condition is better, and the bearing capacity and the safety of the bridge are improved;
the reinforcing layer adopts a reinforcement cage composed of high-strength HRB600 longitudinal ribs, liang Cejian longitudinal ribs and open stirrups, the high-strength HRB600 longitudinal ribs and Liang Cejian longitudinal ribs can respectively improve the bending resistance and the shearing resistance of the beam body, the tensile strength and the safety reserve of the beam body can be obtained on the premise that the steel consumption of the bottom tension area can be controlled to be smaller by adopting the high-strength HRB600 longitudinal ribs, and the section of the reinforcing layer and the Liang Cejian longitudinal ribs which are increased near the supporting point provide enough shearing resistance for the reinforced T beam body, so that the integral strength of the beam body is improved, the construction hoisting is light, and the cost is saved;
the reinforcement cage is connected with the T-beam bridge web through the embedded ribs in the T-beam bridge web, and the reinforcement cage is firmly connected with the original structure after new concrete is poured, so that the integrity is stronger and the stability is higher;
the T beam has larger stressed cross section and good stressed condition, and the planted bars are bound and connected with the reinforcement cage by adopting hot rolled ribbed bars, so that the planted bars are more firmly connected with the reinforcing layer, and the construction is convenient and quick.
Drawings
Fig. 1 is a schematic diagram of a variable cross-section reinforcing structure of a simply supported T-beam web based on UHPC and high-strength steel bars.
FIG. 2 is a schematic view of the structure of section A-A in FIG. 1.
Fig. 3 is a schematic view of the structure of section B-B in fig. 1.
Wherein: 1. a midspan section; 2. a T beam web; 3. a U-shaped reinforcing layer; 4. HRB600 high-strength longitudinal ribs; 5. liang Cejian ribs; 6. an opening stirrup; 7. horizontally planting bars; 8. vertical bar planting; 9. and a support section.
Detailed Description
In order to more clearly describe the technical characteristics of the present solution, the present solution is described below by means of specific embodiments.
Referring to fig. 1-3, a simply supported T-beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars comprises a U-shaped reinforcing layer 3 arranged outside a T-beam web 2, and bar planting connected with the T-beam web 2 and the U-shaped reinforcing layer 3;
the U-shaped reinforcing layer 3 comprises a steel reinforcement cage and ultra-high performance concrete poured outside the steel reinforcement cage, the U-shaped reinforcing layer 3 is divided into 3 sections along the length direction, the middle part of the U-shaped reinforcing layer is a midspan section 1, two ends of the midspan section 1 are support sections 9, the cross section size of the midspan section 1 is unchanged, and the cross section size of the support sections 9 is changed.
The steel bar planting comprises a plurality of horizontal steel bar planting 7 penetrating through the side part of the T beam web 2 and a plurality of vertical steel bar planting 8 penetrating through the bottom of the T beam web 2;
the steel reinforcement cage comprises an HRB600 high-strength longitudinal bar 4 arranged at the bottom of the T beam web plate 2 along the length direction of the T beam, liang Cejian force bars 5 which are parallel to the HRB600 high-strength longitudinal bar 4 and arranged at two sides of the T beam web plate 2, and an opening stirrup 6 connected between the HRB600 high-strength longitudinal bar 4 and the Liang Cejian force bars 5;
the planted bars are bound and connected with the reinforcement cage.
A plurality of horizontal bar planting 7 and a plurality of vertical bar planting 8 are respectively arranged at equal intervals along the length direction of the T beam web 2, and two ends of the horizontal bar planting 7 protrude out of the T beam web 2 and are connected with the Liang Cejian force bars 5 in a binding way.
The length of the midspan section 1 is one half of the length of the U-shaped reinforcing layer 3, the length of the support section 9 is one fourth of the length of the U-shaped reinforcing layer 3, and the section height of the support section 9 gradually increases from the end of the midspan section 1 to the end of the U-shaped reinforcing layer 3.
The depth of the vertical bar planting 8 implanted in the T beam web 2 is not less than 15 times of the bar planting diameter, the horizontal bar planting 7 is arranged above the main bar in the T beam web 2, and the vertical distance from the main bar is not less than 20mm.
The thickness of the U-shaped reinforcing layers 3 on the two sides of the T-beam web 2 is not less than 40mm, and the thickness of the U-shaped reinforcing layers 3 on the bottom of the T-beam web 2 is not less than 60mm.
The thickness of the protective layer of the Liang Cejian force bar 5 is not less than 2cm, and the thickness of the protective layers at the two ends of the horizontal bar planting 7 is 1.5 cm-2cm.
The diameters and the types of the HRB600 high-strength longitudinal bars 4, liang Cejian force bars 5, the opening stirrup 6 and the planted bars are according to T Liang Xuanqu.
As described above, the present utility model can be realized.
The technical features of the present utility model that are not described in the present utility model may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present utility model, and the present utility model is not limited to the above examples, but is also intended to be within the scope of the present utility model by those skilled in the art.
Claims (7)
1. The simple support T-beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars is characterized by comprising a U-shaped reinforcing layer (3) arranged outside a T-beam web (2) and a bar planting connected with the T-beam web (2) and the U-shaped reinforcing layer (3);
the U-shaped reinforcing layer (3) comprises a reinforcement cage and ultra-high performance concrete poured outside the reinforcement cage, the U-shaped reinforcing layer (3) is divided into three sections along the length direction, the middle part of the U-shaped reinforcing layer is a midspan section (1), two ends of the midspan section (1) are respectively provided with a supporting section (9), the cross section size of the midspan section (1) is constant, and the cross section size of the supporting section (9) is changed.
2. The variable cross-section reinforcing structure of a simply supported T-beam web based on UHPC and high-strength steel bars according to claim 1, wherein the steel bar planting comprises a plurality of horizontal steel bar planting (7) penetrating through the side part of the T-beam web (2) and a plurality of vertical steel bar planting (8) penetrating through the bottom of the T-beam web (2);
the steel reinforcement cage comprises an HRB600 high-strength longitudinal rib (4) arranged at the bottom of the T-beam web (2) along the length direction of the T-beam, liang Cejian force ribs (5) which are parallel to the HRB600 high-strength longitudinal rib (4) and arranged at two sides of the T-beam web (2), and opening stirrups (6) connected between the HRB600 high-strength longitudinal rib (4) and the Liang Cejian force ribs (5);
the bar planting is connected with the reinforcement cage in a binding way.
3. The variable cross-section reinforcing structure of a simply supported T-beam web based on UHPC and high-strength steel bars according to claim 2, wherein a plurality of horizontal planting bars (7) and a plurality of vertical planting bars (8) are respectively arranged at equal intervals along the length direction of the T-beam web (2), and two ends of each horizontal planting bar (7) protrude out of the T-beam web (2) and are in binding connection with the Liang Cejian force bars (5).
4. The variable cross-section reinforcing structure of a simply supported T-beam web based on UHPC and high-strength steel bars according to claim 1, wherein the length of the midspan section (1) is one half of the length of the U-shaped reinforcing layer (3), the length of the supporting section (9) is one fourth of the length of the U-shaped reinforcing layer (3), and the cross-section height of the supporting section (9) gradually increases from the end of the midspan section (1) to the end of the U-shaped reinforcing layer (3).
5. The variable cross-section reinforcing structure of a simply supported T-beam web based on UHPC and high-strength steel bars according to claim 3, wherein the depth of the vertical planted bars (8) planted in the T-beam web (2) is not smaller than 15 times of the planted bar diameter, and the horizontal planted bars (7) are arranged above a main bar in the T-beam web (2) and are not smaller than 20mm in vertical distance from the main bar.
6. The variable cross-section reinforcing structure of a simply supported T-beam web based on UHPC and high-strength steel bars according to claim 1, wherein the thickness of the U-shaped reinforcing layers (3) at two sides of the T-beam web (2) is not less than 40mm, and the thickness of the bottom U-shaped reinforcing layer (3) of the T-beam web (2) is not less than 60mm.
7. The variable cross-section reinforcing structure of the simply supported T beam web based on the UHPC and the high-strength steel bars according to claim 3, wherein the thickness of the protective layer of the Liang Cejian steel bar (5) is not less than 2cm, and the thickness of the protective layers at two ends of the horizontal steel bar (7) is 1.5 cm-2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320160506.3U CN219586544U (en) | 2023-02-01 | 2023-02-01 | Simply supported T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320160506.3U CN219586544U (en) | 2023-02-01 | 2023-02-01 | Simply supported T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219586544U true CN219586544U (en) | 2023-08-25 |
Family
ID=87697189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320160506.3U Active CN219586544U (en) | 2023-02-01 | 2023-02-01 | Simply supported T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219586544U (en) |
-
2023
- 2023-02-01 CN CN202320160506.3U patent/CN219586544U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102383420B (en) | High-strength concrete prefabricated pile doped with fiber-reinforced plastic bar | |
| CN203923924U (en) | No. 0 section bracket prepressing device | |
| CN104805767A (en) | Prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck and construction method | |
| CN210288093U (en) | SFCB steel pipe reinforced RPC-concrete composite pier with high strength and high durability | |
| CN112012091A (en) | UHPC-NC mixed box girder, large-span rigid frame bridge and construction method thereof | |
| CN109057148A (en) | Ultra-high performance concrete is without regular reinforcement Prestressed U type beam and its construction method | |
| CN208533868U (en) | A kind of novel arrangement of reinforcement hollow steel pipe high-strength concrete column | |
| CN203593939U (en) | Connecting structure of concrete beams differing in performance | |
| CN109024319A (en) | A kind of the low-pylon cable-stayed bridge ruggedized construction and construction method of double width continuous rigid frame bridge | |
| CN204589815U (en) | Prefabricated assembled FRP-steel-concrete combined bridge deck | |
| CN202208916U (en) | High-strength concrete prefabricated pile | |
| CN219586544U (en) | Simply supported T beam web variable cross-section reinforcing structure based on UHPC and high-strength steel bars | |
| CN219410510U (en) | Steel-ultra-high performance concrete composite structure | |
| CN212294295U (en) | U-shaped beam adopting large-diameter steel strand | |
| CN110409282B (en) | Non-web-rib prestressed self-maintenance composite beam based on permanent post-tensioned prestressed UHPC (ultra high performance concrete) nested template and construction method | |
| CN107882271A (en) | A kind of marine sand concrete superposed column using UHPC outsourcings | |
| CN103590538A (en) | Non-circular rib for concrete | |
| CN110409712A (en) | Prestressing force answers material-ultra-high performance concrete combination beam | |
| CN107313552A (en) | A kind of FRP plate-concrete combination beam | |
| CN214328580U (en) | External prestress and increased cross section combined reinforcing structure of prefabricated box girder | |
| CN213805251U (en) | Ultra-high performance concrete-common concrete composite gravity dam | |
| CN109356034A (en) | A kind of mixed composite continuous bridge superstructure system of vertically and horizontally Prestressed CFRP concrete steel | |
| CN112176850B (en) | Steel-UHPC combined structure shear connector and manufacturing and mounting method thereof | |
| CN109838015B (en) | High-shear-resistance concrete shear wall provided with fiber reinforced composite material grid bars | |
| CN210621439U (en) | Combined beam unit and combined beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |