CN207079460U - Economical no-top plate precast reinforced concrete combines simply supported beam - Google Patents
Economical no-top plate precast reinforced concrete combines simply supported beam Download PDFInfo
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- CN207079460U CN207079460U CN201720938945.7U CN201720938945U CN207079460U CN 207079460 U CN207079460 U CN 207079460U CN 201720938945 U CN201720938945 U CN 201720938945U CN 207079460 U CN207079460 U CN 207079460U
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Abstract
The utility model discloses a kind of economical no-top plate precast reinforced concrete combination simply supported beam, the girder steel of no-top plate is welded into using inverted T shaped or U-steel, the web of girder steel can use straight or Wavelike steel webplate, the prefabricated bridge on the girder steel of above-mentioned no-top plate, form the combination beam of steel concrete entirety section force modes.Preparation method comprises the following steps：Step 1, factory process is inverted T shaped or groove profile no-top plate girder steel；Step 2, factory or cast in situs floorings concrete, steel concrete combination beam total cross-section is formed；Step 3, after floorings concrete to be detected reaches 100% design strength, lift at steel concrete combination beam to bridge location；Step 4, construction combination beam lateral ties, pour Cast-in-Situ Segment and form overall structure；Step 5, construction deck paving and affiliated facility.The utility model can solve on the premise of girder bearing capacity is not reduced, effectively to save rolled steel dosage, drop the technical problems such as construction costs.
Description
Technical field
It the utility model is related to the improved technology of bridge steel-concrete combination simple beam structure.
Background technology
What the existing simply supported girder bridge related to steel construction was commonly used has girder steel, steel-concrete composite beams structure, pre-bending joist steel-concrete group
Girder construction is closed, it is exactly that steel using amount is big, cost is high that these bridges related to steel construction, which have the shortcomings that common, different degrees of,.
The content of the invention
The purpose of this utility model is to provide a kind of economical no-top plate pre-manufactured steel-concrete combination simply supported beam, to solve not
On the premise of reducing girder bearing capacity, rolled steel dosage is effectively saved, reduces the technical problems such as construction costs.
In order to realize foregoing invention purpose, technical scheme is as follows used by the utility model：
Economical no-top plate pre-manufactured steel-concrete combination simply supported beam, the girder steel of no-top plate is welded into using inverted T shaped or U-steel,
The web of girder steel can use straight or Wavelike steel webplate, the prefabricated bridge on the girder steel of above-mentioned no-top plate, it is overall form steel-concrete
The combination beam of section force modes.
The utility model specially manufactures steel beam structure in steel construction and prefabricated manufacturer production first, is prefabricated into combination
Beam, scene is transported to as common precast beam, lifts, be inserted into bridge pier, completes overall bridge.Its advantage and good effect are ratios
The related bridge steel plate amount of the conventional steel construction such as normal steel structure girder, steel concrete combination beam, preflex beam reduces 20%~60%, simultaneously
Than the effect that the concrete amount of preflex beam and prestressed concrete beam reduces 40%~50%, saving construction costs is finally reached
Purpose.
Brief description of the drawings
Fig. 1 is the prefabricated girder steel schematic diagram of no-top plate of the present utility model.
Fig. 2 is the schematic diagram of inverted T shaped girder steel of the present utility model.
Fig. 3 is the schematic diagram of groove profile girder steel of the present utility model.
Fig. 4 is that the floorings concrete of the present utility model that pours forms steel-concrete composite beams total cross-section front view.
Fig. 5 is that the floorings concrete of the present utility model that pours forms inverted T shaped steel-concrete composite beams total cross-section side view.
Fig. 6 is that the floorings concrete of the present utility model that pours forms groove profile steel-concrete composite beams total cross-section side view.
Fig. 7 is lifting steel-concrete composite beams total cross-section front view of the present utility model.
Fig. 8 is inverted T shaped lifting steel-concrete composite beams total cross-section side view of the present utility model.
Fig. 9 is groove profile lifting steel-concrete composite beams total cross-section side view of the present utility model.
Figure 10 is that inverted T shaped lifting steel-concrete composite beams of the present utility model pour Cast-in-Situ Segment side view.
Figure 11 is that groove profile lifting steel-concrete composite beams of the present utility model pour Cast-in-Situ Segment side view.
Figure 12 is inverted T shaped lifting steel-concrete composite beams structural representation after construction deck paving of the present utility model.
Figure 13 is groove profile lifting steel-concrete composite beams structural representation after construction deck paving of the present utility model.
Numbered in figure：1st, floorings concrete, 2, bent cap.
Embodiment
The prefabricated steel reinforced concrete combination simply supported beam of economical no-top plate described in the utility model, takes inverted T shaped, groove profile and is welded into steel
Beam, web can use straight or Wavelike steel webplate, cancel I-shaped, the poorly efficient or invalid top plate of small steel beam with box shape, factory or scene
Prefabricated bridge, form the combination beam of steel-concrete entirety section force modes.Fragmented transport, field module can flexibly be used
Change the construction of assembling, improve convenience for construction, shorten the construction period.The utility model takes full advantage of steel and concrete
Respective material property, its advantage is played in construction and operation stage, to have reached saving steel and concrete works amount, reduce
The purpose of construction costs.
Economical no-top plate pre-manufactured steel-concrete combination simply supported beam preparation method, comprises the following steps：
Step 1, at factory process no-top plate girder steel (inverted T shaped, groove profile), as shown in Figure 1, 2, 3；This is that have top plate with conventional
Girder steel difference part.
Step 2, factory or cast in situs floorings concrete, steel-concrete composite beams total cross-section is formed；As shown in Figure 4,5, 6.
Step 3, after floorings concrete to be detected reaches 100% design strength, lift at steel-concrete composite beams to bridge location；Such as
Shown in Fig. 7,8,9.
Step 4, construction combination beam lateral ties, pour Cast-in-Situ Segment and form overall structure；Referring to shown in Figure 10,11.
Step 5, construction deck paving and affiliated facility.Referring to shown in Figure 12,13.
Cancellation top plate reason of the present utility model and related stress are described as follows：
The stress performance of steel-copper friction pair, judge typically by the section stress value for calculating structure, stress value is got over
It is more unfavorable to structure greatly.
Structure normal section bending stress formula：
σ：Structure normal section bending stress
M：Normal section moment of flexure
y:Distance of the cross-sectional neutral axis to lower edge
I：Section bending resistance the moment of inertia
From above formula, section turn moment is a definite value, is computed comparing using corrugated web, no-top plate steel-concrete
Combination beam influences less for cross sectional moment of inertia, and y values can be relatively reduced, therefore structure normal section bending stress is constant or subtracts
It is small, therefore be believed that for the steel-concrete composite beams of opposite band top plate, top plate (removes top plate thickness in other words without structure function effect
Do not have to influence substantially on structure tension performance or more favourable).It is favourable to structure stress using no-top plate steel-concrete composite beams, and
Girder steel dosage can be effectively saved, reduces construction costs, now using corrugated web, than straight web on the premise of landscape is permitted
Effect is more.
Claims (1)
1. economical no-top plate pre-manufactured steel-concrete combination simply supported beam, it is characterised in that no top is welded into using inverted T shaped or U-steel
The girder steel of plate, the web of girder steel use straight or Wavelike steel webplate, the prefabricated bridge on the girder steel of above-mentioned no-top plate, formed
The combination beam of steel-concrete entirety section force modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720938945.7U CN207079460U (en) | 2017-07-31 | 2017-07-31 | Economical no-top plate precast reinforced concrete combines simply supported beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720938945.7U CN207079460U (en) | 2017-07-31 | 2017-07-31 | Economical no-top plate precast reinforced concrete combines simply supported beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207079460U true CN207079460U (en) | 2018-03-09 |
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| CN201720938945.7U Active CN207079460U (en) | 2017-07-31 | 2017-07-31 | Economical no-top plate precast reinforced concrete combines simply supported beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778662A (en) * | 2019-03-14 | 2019-05-21 | 中铁第四勘察设计院集团有限公司 | Across the rigid flute type beam bridge of shallow tunnel |
-
2017
- 2017-07-31 CN CN201720938945.7U patent/CN207079460U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778662A (en) * | 2019-03-14 | 2019-05-21 | 中铁第四勘察设计院集团有限公司 | Across the rigid flute type beam bridge of shallow tunnel |
| CN109778662B (en) * | 2019-03-14 | 2024-04-02 | 中铁第四勘察设计院集团有限公司 | Rigid frame groove type beam bridge crossing shallow-buried tunnel |
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