CN214245293U - Section steel-ultra-high performance concrete composite beam - Google Patents
Section steel-ultra-high performance concrete composite beam Download PDFInfo
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- CN214245293U CN214245293U CN202022757579.XU CN202022757579U CN214245293U CN 214245293 U CN214245293 U CN 214245293U CN 202022757579 U CN202022757579 U CN 202022757579U CN 214245293 U CN214245293 U CN 214245293U
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Abstract
The utility model discloses a shaped steel-ultra high performance concrete combination beam, including falling T shaped steel and ultra high performance concrete T type roof beam, ultra high performance concrete T type roof beam is provided with the strengthening rib including the ultra high performance concrete pterygoid lamina of horizontal setting and the ultra high performance concrete web of vertical setting in ultra high performance concrete pterygoid lamina and the ultra high performance concrete web, should fall T shaped steel including the steel pterygoid lamina of horizontal setting and the steel web of vertical setting, is provided with the shear force key on the steel web in succession, and the shear force key parcel is in the inside of ultra high performance concrete web lower extreme. The utility model has the advantages of simple and reasonable structure, the construction is built portably, the material does not have the loss, the dead weight is light, and the atress performance is excellent, can effectively solve a great deal of problem that current steel-concrete composite beam structure exists.
Description
Technical Field
The utility model relates to a bridge engineering technical field especially relates to a shaped steel-ultra high performance concrete composite beam.
Background
The steel-concrete composite beam fully utilizes the advantages of steel tension and concrete compression, has good technical and economic benefits, and is widely applied to engineering structures. Shear bonds are important components to ensure the interfacial properties and cooperative work of steel-concrete composite structures. At present, shear keys commonly used at home and abroad comprise stud shear keys and perforated rib Plate (PBL) shear keys, and steel beams are generally formed by welding the shear keys to the upper flange of the H-shaped steel. However, the upper flange of the H-shaped steel is less stressed, the mechanical property of the steel is not fully utilized, and the material waste is caused; the welding is troublesome in construction, and the risk of fatigue cracking is greatly increased; for the PBL shear connector, steel bars are usually implanted into holes, so that construction is troublesome; for the shear key adopting the stud, the shear key has the defects of low shear rigidity, poor ductility and the like.
The ultra-high performance concrete has excellent durability and mechanical properties, particularly compression resistance and tensile resistance, and the development of bridge building structures tends to be large-span and light. If the ultra-high performance concrete is applied to a combined structure to form the steel-ultra-high performance concrete combined beam, the structure thickness can be greatly reduced by fully utilizing the compression resistance of the ultra-high performance concrete, the ultra-high performance concrete can participate in tension to replace part of a tension steel plate and a reinforcing steel bar, and the steel consumption is further reduced, so that the light steel-ultra-high performance concrete combined beam with excellent economic and technical benefits is formed. Therefore, the utility model relates to a light steel-ultra high performance concrete composite beam with shear force key that shear strength is high, toughness is excellent, the construction is convenient, waste steel does not just guarantee the cooperation atress of steel-concrete composite structure is especially important.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shaped steel-ultra high performance concrete composite beam to solve above-mentioned problem.
In order to realize the above-mentioned purpose, the utility model discloses a shaped steel-ultra high performance concrete composite beam, including falling T shaped steel and ultra high performance concrete T type roof beam, ultra high performance concrete T type roof beam is including the ultra high performance concrete pterygoid lamina of horizontal setting and the ultra high performance concrete web of vertical setting, be provided with the strengthening rib in ultra high performance concrete pterygoid lamina and the ultra high performance concrete web, it forms to adopt H shaped steel to fall T shaped steel along web one-tenth two, and this falls T shaped steel includes the steel pterygoid lamina of horizontal setting and the steel web of vertical setting, be provided with the shear force key on the steel web in succession, the shear force key parcel is in the inside of ultra high performance concrete web lower extreme.
Furthermore, the inverted T-shaped steel is formed by dividing H-shaped steel into two parts along the length direction of the web.
Furthermore, the inverted T-shaped steel and the shear key are formed by cutting H-shaped steel into two parts along the center line of the web plate at one time.
Furthermore, the tooth-shaped shear key is an arc tooth-shaped shear key with arc transition at the edge, the section of each groove of the shear key is arc tooth-shaped, and a protruding part with the same section is arranged between every two adjacent groove.
Further, the thickness of the shear key is less than or equal to 20mm, and the height of the shear key is less than or equal to 80 mm.
Further, the thickness of the ultra-high performance concrete wing plate is less than or equal to 150mm, and the thickness of the ultra-high performance concrete web plate is less than or equal to 120 mm.
Further, the reinforcing ribs comprise reinforcing steel bars which are arranged in the ultra-high performance concrete wing plates and the ultra-high performance concrete web plates in a criss-cross mode, and reinforcing stirrups which are arranged in the ultra-high performance concrete web plates.
Further, the bottom of the reinforcement stirrup in the ultra-high performance concrete web plate transversely penetrates through the groove part of the shear key.
Further, the bottom of the ultra-high performance concrete web is provided with longitudinal tension steel bars.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a piece of H shaped steel can once only form two from the lossless type of falling T girder steel of taking continuous arc tooth shear force key without the loss ground cutting, and preparation convenient and fast and material can make full use of, reduce the loss of steel sheet.
The utility model discloses an arc tooth shear force key is formed by the cutting route, need not the welding, and the arc changeover portion can effectively avoid stress concentration, and fatigue resistance is excellent.
The utility model discloses an arc tooth shear force key than stud shear force key rigidity big, strong with the anchoring of ultra high performance concrete and reinforcing bar/stirrup, the fracture intensity is high, and the combination atress performance is excellent.
The utility model discloses a steel web constitutes combination web with ultra high performance concrete web, and ultra high performance concrete web participates in and is drawn, can effectively improve the height of combination beam, strengthens crossing over the ability.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic view illustrating the cutting and forming of an inverted T-shaped steel of a section steel-ultra high performance concrete composite beam according to a preferred embodiment of the present invention;
fig. 2 is an axial view of an inverted T-shaped steel of a section steel-ultra high performance concrete composite beam according to a preferred embodiment of the present invention;
fig. 3 is an axial view of the steel section-ultra high performance concrete composite beam according to the preferred embodiment of the present invention.
Illustration of the drawings:
1. a shear key;
2. inverted T-shaped steel; 21. a steel wing plate; 22. a steel web;
3. ultra-high performance concrete T-beams; 31. an ultra-high performance concrete wing panel; 32. an ultra-high performance concrete web;
4. reinforcing steel bars;
5. and (5) reinforcing the stirrup.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in FIGS. 1-3, the embodiment of the utility model discloses shaped steel-ultra high performance concrete composite beam, including falling T shaped steel 2 and ultra high performance concrete T type roof beam 3, ultra high performance concrete T type roof beam 3 is including the ultra high performance concrete pterygoid lamina 31 of horizontal setting and the ultra high performance concrete web 32 of vertical setting, and it takes shape to be the integral type to pour. Reinforcing ribs are arranged in the ultra-high performance concrete wing plate 31 and the ultra-high performance concrete web plate 32 and are used for improving the strength of the ultra-high performance concrete T-shaped beam 3, the inverted T-shaped steel 2 is formed by cutting H-shaped steel into two pieces along the central line of the web plate in a split mode, two pieces of lossless inverted T-shaped steel 2 with the shear key 1 can be formed through one-step cutting of the H-shaped steel without loss, the manufacturing is convenient and fast, materials can be fully utilized, the loss of a steel plate is reduced, specifically, numerical control equipment or fire oxygen cutting can be adopted, the mode is preferable and optional, the inverted T-shaped steel 2 can also be directly formed by cutting the web plate of the T-shaped steel, the shear key 1 can be formed, the defect is that the price of the T-shaped steel is relatively high, and materials are wasted. The inverted T-shaped steel 2 comprises a steel wing plate 21 arranged transversely and a steel web plate 22 arranged longitudinally, wherein a shear key 1 is continuously arranged on the steel web plate 22, and the shear key 1 is formed by a cutting path. The shear key 1 is wrapped inside the lower end of the ultra-high performance concrete web 32, so that the steel web 22 and the ultra-high performance concrete web 32 form a composite web.
In the embodiment, the shear key 1 is an arc tooth-shaped shear key with arc transition at the corner, the sections of the groove parts of the arc tooth-shaped shear key are arc tooth-shaped, and a protruding part with the same section is arranged between two adjacent groove parts, so that the arc tooth-shaped shear key does not need to be welded; on the other hand, the arc-shaped transition section can effectively avoid stress concentration and has excellent fatigue resistance.
In this embodiment, when the specific size is set, the thickness of the steel plate of the shear key 1 may be less than or equal to 20mm, and the height may be less than or equal to 80 mm; the thickness of the ultra-high performance concrete wing plate 31 can be smaller than or equal to 150mm, the thickness of the ultra-high performance concrete web plate 32 can be smaller than or equal to 120mm, the height of the combined beam can be effectively improved while the light weight is realized, and the spanning capacity is enhanced.
In the present embodiment, the reinforcing bars include reinforcing bars 4 arranged in the ultra high performance concrete wings 31 and the ultra high performance concrete web 32 in a criss-cross manner, and reinforcing stirrups 5 arranged in the ultra high performance concrete web 32. The reinforcing steel bars 4 and the reinforcing stirrups 5 are bound to form a reinforcing mesh. And pouring the ultra-high performance concrete, maintaining according to the specification, and dismantling the template. The bottom of the reinforcement stirrup 5 in the ultra-high performance concrete web 32 transversely passes through the groove part of the shear key 1, so that the connection strength between the ultra-high performance concrete and the shear key 1 can be enhanced, and the shear strength is improved.
In this embodiment, the bottom of the ultra-high performance concrete web 32 is disposed with longitudinal tension bars, the longitudinal tension bars are disposed along the length direction of the ultra-high performance concrete web 32, the thickness of the ultra-high performance concrete protective layer outside the longitudinal tension bars is not less than 15mm, and the tensile cracking resistance strength of the ultra-high performance concrete web 32 is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The section steel-ultrahigh-performance concrete combined beam is characterized by comprising an inverted T-shaped steel (2) and an ultrahigh-performance concrete T-shaped beam (3), wherein the ultrahigh-performance concrete T-shaped beam (3) comprises a transversely arranged ultrahigh-performance concrete wing plate (31) and a longitudinally arranged ultrahigh-performance concrete web plate (32), reinforcing ribs are arranged in the ultrahigh-performance concrete wing plate (31) and the ultrahigh-performance concrete web plate (32), the inverted T-shaped steel (2) comprises a transversely arranged steel wing plate (21) and a longitudinally arranged steel web plate (22), a shear key (1) is continuously arranged on the steel web plate (22), and the shear key (1) is wrapped in the inner part of the lower end of the ultrahigh-performance concrete web plate (32).
2. The section steel-ultra high performance concrete composite beam according to claim 1, wherein the inverted T-shaped steel (2) is formed by splitting an H-shaped steel into two parts along the length direction of a web.
3. The section steel-ultra high performance concrete composite beam according to claim 2, wherein the inverted T-shaped steel (2) and the shear key (1) are cut once in two by adopting H-shaped steel along the center line of the web.
4. The section steel-ultra high performance concrete composite beam as claimed in claim 1, wherein the shear key (1) is a circular arc tooth-shaped shear key with circular arc transition at the corners, the section of the groove portion of the shear key (1) is in a shape of circular arc tooth, and a protruding portion with the same section is arranged between two adjacent groove portions.
5. The section steel-ultra high performance concrete composite beam according to claim 1, wherein the shear key (1) has a thickness of 20mm or less and a height of 80mm or less.
6. The section steel-ultra high performance concrete composite beam according to claim 1, wherein the thickness of the ultra high performance concrete wing plate (31) is less than or equal to 150mm, and the thickness of the ultra high performance concrete web plate (32) is less than or equal to 120 mm.
7. The section steel-ultra high performance concrete composite beam according to claim 1, wherein the reinforcing bars include reinforcing steel bars (4) arranged in an ultra high performance concrete wing plate (31) and an ultra high performance concrete web plate (32) in a criss-cross manner, and reinforcing stirrups (5) arranged in the ultra high performance concrete web plate (32).
8. The section steel-ultra high performance concrete composite beam according to claim 7, wherein the bottom of the reinforcement stirrup (5) in the ultra high performance concrete web (32) transversely passes through the groove portion of the shear key (1).
9. The section steel-ultra high performance concrete composite beam according to any one of claims 1 to 8, wherein the bottom of the ultra high performance concrete web (32) is arranged with longitudinal tension bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022757579.XU CN214245293U (en) | 2020-11-25 | 2020-11-25 | Section steel-ultra-high performance concrete composite beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022757579.XU CN214245293U (en) | 2020-11-25 | 2020-11-25 | Section steel-ultra-high performance concrete composite beam |
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| Publication Number | Publication Date |
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| CN214245293U true CN214245293U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022757579.XU Active CN214245293U (en) | 2020-11-25 | 2020-11-25 | Section steel-ultra-high performance concrete composite beam |
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| CN (1) | CN214245293U (en) |
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- 2020-11-25 CN CN202022757579.XU patent/CN214245293U/en active Active
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