CN101343856A - Novel steel braced girder composite structure - Google Patents
Novel steel braced girder composite structure Download PDFInfo
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- CN101343856A CN101343856A CNA2008100488518A CN200810048851A CN101343856A CN 101343856 A CN101343856 A CN 101343856A CN A2008100488518 A CNA2008100488518 A CN A2008100488518A CN 200810048851 A CN200810048851 A CN 200810048851A CN 101343856 A CN101343856 A CN 101343856A
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Abstract
The invention relates to a novel steel truss beam composite structure. A steel-concrete combined bridge surface subsection is arranged at the side span or at the middle span of a main truss according to the requirements, and an all-steel beam structure subsection can be arranged at the middle span or at the side span of the main truss according to the requirements. In the invention, the all-steel truss beam subsection is adopted at the section with the deadweight required to be reduced, and the steel-concrete combined bridge surface subsection is adopted when the deadweight is required to be increased or the rigidness of the bridge beam is required to be increased. The characteristics of strong integrity and great rigidity of the steel truss beam-concrete combination are fully utilized in the invention, and problems of rigidity of the all-steel truss beam and negative reaction of the side span are solved. Therefore, the invention has the advantages that the stress rationality of double-purpose continual steel truss beams of wide-span highways and railways can be guaranteed, the material performance of steel and concrete is fully utilized, the cross section of each rod is reduced, and the requirements for the steel beams and thick sheets are reduced, so the steel material can be purchased easily. So the reduction of the whole project cost is realized.
Description
Technical field
The present invention relates to a kind of large span combined bridge.
Background technology
In recent decades, along with the Chinese society rapid development of economy, having train, the mechanical transport amount of striding river demand over strait rapidly increases, and the bridge location resource is limited, owing to the navigation requirement in river, the span of bridge also constantly increases, and is more and more higher to the requirement of bridge functional performance simultaneously.The highway and railway dual-purpose truss steel beam bridge has that span is big, in light weight, the supporting capacity advantages of higher, usually becomes to stride the primary form of structure of selecting of river bridge spanning the sea.In the design of this bridge type, often run into following problem: 1, because bridge span is bigger, or under various external condition restrictions, striding the footpath arranges unreasonable, negative reaction appears in bearing easily, or mobile load is bigger, if full-bridge all adopts steel truss girder may cause the unreasonable of structure stress and use aspect in some cases; 2, equal steel-mixing structure then may be excessive and uneconomical owing to conducting oneself with dignity if full-bridge adopts, even makes structure be difficult to design.
Summary of the invention
The objective of the invention is at above-mentioned present situation, it is strong to aim to provide a kind of globality, and rigidity is big, have good resistance to lateral bending and torsional rigidity, can bear the huge axle power of beam bridge, can efficiently solve the bearing negative reaction, a kind of novel steel braced girder composite structure that construction costs is low.
The implementation of the object of the invention is, a kind of novel steel braced girder composite structure, the end bay of main truss or in stride layout steel truss girder-concrete in conjunction with the bridge floor sections, in main truss, stride or end bay adopts all steel girder construction sections.
The present invention adopts all steel trusses sections at the section that needs alleviate deadweight, when maybe needing to increase bridge rigidity, needs increasing deadweight adopt steel-concrete in conjunction with the bridge floor sections, adopt this kind form of structure, can increase bridge rigidity on the one hand, the negative reaction that can utilize the dead-weight balanced bridge load of steel truss girder-concrete combined structure to produce on the other hand again at the end bay bearing; For striding in being arranged in or all steel girder construction sections of end bay, can increase bridge span, alleviate the system deadweight, thereby reach the purpose that makes full use of steel and concrete material performance.
The present invention had both made full use of the characteristics that globality is strong, rigidity is big of steel truss girder-concrete combination, had solved all steel trusses rigidity and end bay bearing negative reaction problem again.Not only guaranteed the stressed reasonability of the combined continuous steel girder of large span, and can make full use of steel and concrete material property, reduced bar cross section, reduced demand, made steel be easy to buying the girder steel slab.Thereby realized reducing the purpose of whole construction costs.
Description of drawings
Fig. 1 is a main truss elevation of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to view;
Fig. 3 is that the B-B of Fig. 1 is to view.
The specific embodiment
The present invention is at the end bay of main truss 1, strides in also may being as required and arrange that steel-concrete in conjunction with bridge floor sections 2, strides in main truss 1, also may arrange all steel girder construction sections 3 at end bay as required.
With reference to Fig. 1, main truss 1 of the present invention has 6 bridge piers 4, arranges steel-concrete in conjunction with bridge floor sections 2 at end bay length L 1=168 rice, arranges all steel trusses sections 3 at middle span length's degree L2=756 rice.
Fig. 2 is arranged in all steel trusses sections 3 standard cross-sections of striding in the main truss 1 in the L2 scope.
Fig. 3 is arranged in steel-concrete in the end bay L1 scope of main truss 1 in conjunction with bridge floor sections 2 standard cross-sections.
The present invention adopts all steel trusses sections at the section that needs alleviate deadweight, when maybe needing to increase bridge rigidity, needs increasing deadweight adopt steel-concrete in conjunction with the bridge floor sections, adopt this kind form of structure, can increase bridge rigidity on the one hand, the negative reaction that can utilize the dead-weight balanced bridge load of steel truss girder-concrete combined structure to produce on the other hand again at the end bay bearing; For striding in being arranged in or all steel girder construction sections of end bay, can increase bridge span, alleviate the system deadweight, thereby reach the purpose that makes full use of steel and concrete material performance.
Claims (1)
1, a kind of novel steel braced girder composite structure, it is characterized in that the end bay of main truss or in stride and arrange steel-concrete in conjunction with the bridge floor sections, stride in the main truss or end bay is arranged all steel girder construction sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100488518A CN101343856A (en) | 2008-08-18 | 2008-08-18 | Novel steel braced girder composite structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100488518A CN101343856A (en) | 2008-08-18 | 2008-08-18 | Novel steel braced girder composite structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101343856A true CN101343856A (en) | 2009-01-14 |
Family
ID=40245963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100488518A Pending CN101343856A (en) | 2008-08-18 | 2008-08-18 | Novel steel braced girder composite structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN101343856A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603288B (en) * | 2009-07-03 | 2012-05-30 | 中铁大桥局股份有限公司 | Three-truss main girder structure of highway and railway bi-purpose cable-stayed bridge and installation method thereof |
| CN103225263A (en) * | 2013-05-08 | 2013-07-31 | 中铁大桥勘测设计院集团有限公司 | Orthotropic steel box bridge deck with track steel .truss girder for railway ballastless |
| CN103225255A (en) * | 2013-04-27 | 2013-07-31 | 中铁二院工程集团有限责任公司 | Steel truss girder constitution for large-span six-line double-layered railway bridge |
| CN103343507A (en) * | 2013-07-03 | 2013-10-09 | 中铁大桥勘测设计院集团有限公司 | Composite structure of three main trusses, longitudinal beams, transverse beams and concrete slabs |
| CN103924502A (en) * | 2014-04-24 | 2014-07-16 | 林同棪国际工程咨询（中国）有限公司 | Multi-layer bridge face highway-light railway dual-purpose bridge |
-
2008
- 2008-08-18 CN CNA2008100488518A patent/CN101343856A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603288B (en) * | 2009-07-03 | 2012-05-30 | 中铁大桥局股份有限公司 | Three-truss main girder structure of highway and railway bi-purpose cable-stayed bridge and installation method thereof |
| CN103225255A (en) * | 2013-04-27 | 2013-07-31 | 中铁二院工程集团有限责任公司 | Steel truss girder constitution for large-span six-line double-layered railway bridge |
| CN103225263A (en) * | 2013-05-08 | 2013-07-31 | 中铁大桥勘测设计院集团有限公司 | Orthotropic steel box bridge deck with track steel .truss girder for railway ballastless |
| CN103343507A (en) * | 2013-07-03 | 2013-10-09 | 中铁大桥勘测设计院集团有限公司 | Composite structure of three main trusses, longitudinal beams, transverse beams and concrete slabs |
| CN103343507B (en) * | 2013-07-03 | 2015-04-29 | 中铁大桥勘测设计院集团有限公司 | Composite structure of three main trusses, longitudinal beams, transverse beams and concrete slabs |
| CN103924502A (en) * | 2014-04-24 | 2014-07-16 | 林同棪国际工程咨询（中国）有限公司 | Multi-layer bridge face highway-light railway dual-purpose bridge |
| CN103924502B (en) * | 2014-04-24 | 2016-08-31 | 林同棪国际工程咨询（中国）有限公司 | Multilayer deck rail-cum-road bridge beam |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090114 |