CN211200022U - Modularized UHPC box-shaped simply-supported beam bridge with adjustable span - Google Patents
Modularized UHPC box-shaped simply-supported beam bridge with adjustable span Download PDFInfo
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- CN211200022U CN211200022U CN201921482980.8U CN201921482980U CN211200022U CN 211200022 U CN211200022 U CN 211200022U CN 201921482980 U CN201921482980 U CN 201921482980U CN 211200022 U CN211200022 U CN 211200022U
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Abstract
The utility model provides a stride modulization UHPC box simply supported girder bridge of footpath adjustable, including UHPC box girder segment section, end crossbeam, external prestressing force, turning block. The utility model discloses the light slim and graceful of UHPC box letter beam bridge structure adopts the form of fulcrum position girder height to striding the high gradual change of well position girder, and the atress changes unanimously with the roof beam height, make full use of UHPC's material performance to reduce the material quantity. The utility model discloses well UHPC case roof beam segment is mill's prefabricated component to UHPC case roof beam segment is standard component, strides the quantity of well UHPC case roof beam segment through the increase and decrease, and cooperates external prestressing force, realizes that the same bridge width is different to stride fast assembling of footpath simply supported girder bridge.
Description
Technical Field
The utility model relates to a bridge superstructure field, concretely relates to stride footpath adjustable modulization UHPC box simply supported girder bridge.
Background
UHPC is an ultra-high performance concrete, and has excellent mechanical properties, high tensile strength and good durability. Compared with a concrete structure bridge, the UHPC bridge has light dead weight, is convenient to transport and assemble on site, reduces the interference degree to traffic, and simultaneously, the light weight of the upper structure also reduces the requirement on the lower structure; compared with a steel structure bridge, the UHPC bridge has better durability and lower maintenance cost in the later period.
SUMMERY OF THE UTILITY MODEL
To the not enough of current simple beam bridge, the utility model aims to provide a stride footpath adjustable modulization UHPC box simple beam bridge, the bridge dead weight is light, and the structure is merrily and lightheartedly pleasing to the eye, but the wide application is in the different simple beam bridge field of striding the footpath.
The purpose of the utility model can be realized through the following technical scheme:
a span-adjustable modularized UHPC box-shaped simply-supported beam bridge comprises UHPC box beam sections, wherein concave-convex shear keys are arranged at the end parts of the UHPC box beam sections, one adjacent surface of each adjacent section is a convex surface, the other adjacent surface of each adjacent section is a concave surface, the number of the sections of the UHPC box beam sections in the span is increased or decreased so as to be suitable for bridges with different spans, the bridge further comprises external prestress, the external prestress is anchored on an end cross beam of the UHPC box-shaped simply-supported beam bridge, a steering block is further arranged in each UHPC box beam section, and the external prestress penetrates through the steering block.
The utility model discloses a further technique:
preferably, the UHPC box girder segment is provided with cantilever stiffening ribs every 1-2 m along the longitudinal bridge direction, and the end part of the UHPC box girder segment is simultaneously provided with the cantilever stiffening ribs and the box inner top plate stiffening ribs, so that the transverse rigidity of the bridge deck is effectively improved, and the transverse stress is reduced.
Preferably, the UHPC box girder segment is prefabricated in a factory, and the length of the segment is usually 3-10 m.
Preferably, the longitudinal slope of the bridge is realized by the height of the UHPC box girder segment, the height of the small girder at the fulcrum position is gradually changed into the height of the large girder at the midspan position, and the stress characteristics of small shearing force and large midspan rigidity requirement of the fulcrum of the UHPC box girder are met.
Preferably, the UHPC box girder segment is internally provided with a vibration damping device.
A span adjustable modulization UHPC box simply supported girder bridge, its beneficial effect is:
the UHPC box-shaped simply-supported beam bridge has the advantages that the structure is light and thin, the characteristics of small fulcrum shearing force and strict rigidity requirement are presented, the section adopts a mode that the height of a small beam at the fulcrum position changes gradually to the height of a large beam at the midspan position, the stress is consistent with the change of the beam height, the characteristics of UHPC materials are fully exerted, and therefore the material consumption is reduced.
And 2, the UHPC box girder segments are factory prefabricated components, the UHPC box girder segments are used as standard components, and the number of the UHPC box girder segments in the span is increased or decreased, and external prestress is matched to realize the rapid assembly of the simply supported girder bridges with the same bridge width and different span diameters.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall construction of a modular UHPC box-shaped simply supported girder bridge with adjustable span;
FIG. 2 is a cross-sectional view of a diverter block;
FIG. 3 is a cross-sectional view of a shear key;
FIG. 4 is a cross-sectional view of a shock absorbing device;
in the figure, 1-UHPC box girder segment, 2-end beam, 3-external prestress, 4-steering block, 5-damping device, 6-cantilever stiffening rib, 7-box inner top plate stiffening rib and 8-concave-convex shear key.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected to the inside of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example 1:
referring to fig. 1-4, a span-adjustable modular UHPC box-shaped simply-supported girder bridge comprises UHPC box girder segments 1, end cross beams 2, external prestress 3, steering blocks 4 and a damping device 5.
The end part of the UHPC box girder segment is provided with a concave-convex shear key, one adjacent surface of the adjacent segment is a convex surface, the other adjacent surface is a concave surface, the number of the segments of the UHPC box girder segment in the span is increased or decreased so as to be suitable for bridges with different spans, the UHPC box girder segment further comprises external prestress, the external prestress is anchored on an end cross beam of the UHPC box-shaped simply-supported girder bridge, a steering block is further arranged in the UHPC box girder segment, and the external prestress penetrates through the steering block.
The longitudinal slope of the bridge is realized by the height of the UHPC box girder segment 1, the height of the trabecula at the fulcrum position is gradually changed into the height of the girder at the midspan position, and the stress characteristics of small shearing force and large midspan rigidity requirement of the fulcrum of the UHPC box girder are met.
The UHPC box girder segment 1 is prefabricated in a factory, the length of the segment is usually 3-10 m, and the UHPC box girder segment 1 is suitable for bridges with different spans by increasing or decreasing the number of the segments.
The UHPC box girder segment 1 is provided with cantilever stiffening ribs 6 every 1-2 m along the longitudinal bridge direction, and the end part of the UHPC box girder segment is simultaneously provided with the cantilever stiffening ribs 6 and the box inner top plate stiffening ribs 7, so that the transverse rigidity of the bridge deck is effectively improved, and the transverse stress is reduced.
The end part of the UHPC box girder segment 1, the cantilever stiffening ribs 6 and the box inner top plate stiffening ribs 7 are provided with concave-convex shear keys 8, one of adjacent surfaces of adjacent segments is a convex surface, the other is a concave surface, and the arrangement of the concave-convex shear keys is facilitated due to the arrangement of the cantilever stiffening ribs 6 and the box inner top plate stiffening ribs 7.
The end beam 2 is made of UHPC or common concrete, common stressed steel bars are arranged, and the external prestress 3 is anchored on the end beam 2.
The thickness of the end beam 2 is more than or equal to 1 m.
The steering block 4 and the UHPC box girder segment 1 are cast once when being prefabricated, and common stressed steel bars are arranged in the steering block 4.
Because various factors such as vehicle traffic can cause the structure and the external cable body to vibrate, if the natural vibration frequency of the cable body is close to the vibration frequency of the whole structure, resonance can be caused, and potential safety hazards are brought to the whole structure. In order to make the vibration frequency of the free section of the cable body different from that of the whole structure, a vibration damping device is required to be installed at a proper distance so as to shorten the vibration interval of the free section of the cable body and properly damp vibration. As a rule of thumb, the appropriate spacing of the damping devices is typically 1/4 times the length of the beam section.
The distance between the shock absorption devices 5 in the longitudinal bridge direction is less than 8 m.
Consists of a haversian rubber damping block, a cable hoop and a long screw rod. And at the limiting position, the damping block is tightly pressed on the surface of the cable body by using a cable hoop, the long screw penetrates into a cable hoop hole, and the nut is installed for positioning. The other end of the long screw is firmly welded with the beam body pre-embedded iron.
Example 2:
compared with embodiment 1, the modular UHPC box-shaped simple girder bridge with adjustable span of the present embodiment has the following differences:
the steering block 4 adopts a vertical rib type or a cross beam type, so that the rigidity of the UHPC box girder at the position of the steering block 4 is effectively improved, and the deformation of a web plate and a top plate caused by prestress is reduced.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A span adjustable modulization UHPC box simply supported girder bridge which characterized in that: the ultra-high-strength UHPC box girder bridge comprises UHPC box girder segments, wherein concave-convex shear keys are arranged at the end parts of the UHPC box girder segments, one adjacent surface of each adjacent segment is a convex surface, the other adjacent surface of each adjacent segment is a concave surface, the number of the segments of the UHPC box girder segments in the span is increased or decreased so as to be suitable for bridges with different span diameters, the ultra-high-strength UHPC box girder bridge also comprises external prestress, the external prestress is anchored on end cross beams of the UHPC box simple girder bridge, steering blocks are further arranged in the UHPC box girder segments, and the external prestress penetrates through the.
2. The modular UHPC box-shaped simple girder bridge with adjustable span according to claim 1, wherein: the UHPC box girder segment is provided with cantilever stiffening ribs every 1-2 m along the longitudinal bridge direction, and the end part of the UHPC box girder segment is simultaneously provided with the cantilever stiffening ribs and the box inner top plate stiffening ribs.
3. The modular UHPC box-shaped simple girder bridge with adjustable span according to claim 1, wherein: the UHPC box girder segment is prefabricated in a factory, and the length of the segment is 3-10 m.
4. The modular UHPC box-shaped simple girder bridge with adjustable span according to claim 1, wherein: the bridge longitudinal slope is realized by the height of a UHPC box girder segment, and the height of a small girder at a fulcrum position is gradually changed into the height of a large girder at a midspan position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921482980.8U CN211200022U (en) | 2019-09-07 | 2019-09-07 | Modularized UHPC box-shaped simply-supported beam bridge with adjustable span |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921482980.8U CN211200022U (en) | 2019-09-07 | 2019-09-07 | Modularized UHPC box-shaped simply-supported beam bridge with adjustable span |
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| CN211200022U true CN211200022U (en) | 2020-08-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561863A (en) * | 2022-02-10 | 2022-05-31 | 武汉大学 | Top plate transverse stiffening type prestressed concrete wide box girder |
| CN114687448A (en) * | 2022-06-02 | 2022-07-01 | 清华大学 | Transfer beam, building structure and construction method |
| PL442059A1 (en) * | 2022-08-22 | 2024-02-26 | Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk | Module, modular system for building tubular structures, tubular structure and method of creating tubular structures based on this module |
-
2019
- 2019-09-07 CN CN201921482980.8U patent/CN211200022U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561863A (en) * | 2022-02-10 | 2022-05-31 | 武汉大学 | Top plate transverse stiffening type prestressed concrete wide box girder |
| CN114687448A (en) * | 2022-06-02 | 2022-07-01 | 清华大学 | Transfer beam, building structure and construction method |
| PL442059A1 (en) * | 2022-08-22 | 2024-02-26 | Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk | Module, modular system for building tubular structures, tubular structure and method of creating tubular structures based on this module |
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