CN101280546A - Lower chord opening beam type corrugated steel web combination beam - Google Patents
Lower chord opening beam type corrugated steel web combination beam Download PDFInfo
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- CN101280546A CN101280546A CNA2008100896324A CN200810089632A CN101280546A CN 101280546 A CN101280546 A CN 101280546A CN A2008100896324 A CNA2008100896324 A CN A2008100896324A CN 200810089632 A CN200810089632 A CN 200810089632A CN 101280546 A CN101280546 A CN 101280546A
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Abstract
The invention relates to a bottom chord open truss type corrugated steel web composite beam, belonging to a bridge support member. The bottom chord open truss type corrugated steel web composite beam is composed of a top-wing concrete slab, a corrugated steel web and a bottom chord open truss type rectangular steel pipe concrete. Compared with the steel truss type web composite cross section, the bottom chord open truss type corrugated steel web composite beam adopts the corrugated steel web with high shear strength to replace the steel web bar, and has high shear bearing force. The open truss type bottom chord is composed of two parallel rectangular steel pipes and concretes casted in the steel pipes, horizontal supports between rectangular steel pipes, and inclined supports. the bottom chord adopts the steel pipe concrete member to overcome the problem that the bottom flange concrete of the traditional corrugated steel web box beam and steel truss type web composite cross section needs to set up scaffold, support framework and concrete casting so as to have large work load, moreover the bottom chord open truss type corrugated steel web composite beam can improve crack resistance of structure effectively and avoid crack from being exposed, so that structural endurance can be obviously improved. The bottom chord is an open type structure with support connection, and has the advantages of simple structure, convenient and rapid construction.
Description
Technical field
The present invention relates to a kind of lower chord opening beam type corrugated steel web combination beam that can be applicable to railroad bridge and highway bridge; Belong to the bridge construction technical field.
Background technology
Traditional formula web compound section, steel purlin is to be developed by the concrete box tee section, it adopts the steel boom to replace the concrete web of box section, thereby form by top flange concrete slab, steel boom and the common stressed structural system of bottom flange concrete slab, as shown in Figure 1.When the web member of this class formation adopts the steel boom, for avoiding steel boom pressurized flexing, often need be in the pressurized boom concrete perfusion, need being subjected to tension chord to apply prestressing force sometimes for reducing tensile stress level, the site operation workload is big.Meanwhile, formula web compound section, steel purlin and traditional corrugated steel web case beam (see figure 2) are similar, and there are problems such as field operation amount and difficulty of construction are big in building the scene of need and setting up scaffold, a template etc. of bottom flange concrete slab.On the other hand, cracking appears in concrete floor easily under the positive bending moment effect, and the crack can reduce bearing capacity, rigidity and the durability of structure.
Summary of the invention
The objective of the invention is to set up the construction operation amount of scaffold, a template etc., and propose a kind of a kind of lower chord opening beam type corrugated steel web combination beam that can improve structural bearing capacity, rigidity and cracking resistance for reducing the combined box beam concreting significantly.
Technical scheme of the present invention is as follows:
A kind of lower chord opening beam type corrugated steel web combination beam, it is characterized in that: this compound beam is made up of top flange concrete slab, corrugated steel web and lower edge concrete-filled rectangular steel tube member, described lower edge concrete-filled rectangular steel tube member adopts opens wide purlin formula structure, this opens wide purlin formula structure is by the rectangular steel pipe of two parallel placements and the concrete of inner perfusion, and the horizontal support and the diagonal brace that are arranged between described two rectangular steel pipes are formed; In described rectangular steel pipe, reserve the duct of lower edge prestressed reinforcement of tensioning bundle.
Technical characterictic of the present invention also is: at the inboard of described rectangular steel pipe welding bracket A and bracket B, be used to connect two horizontal support and diagonal braces between the rectangular steel pipe.
Another technical characterictic of the present invention is: the upper surface at described rectangular steel pipe is reserved the concrete spouting hole.
The present invention has the following advantages with respect to prior art and the high-lighting effect: 1. compare with formula web compound section, steel purlin, adopted the higher corrugated steel web of shear strength to replace the steel web member, have very high shear resistant capacity.2. lower edge adopts concrete filled steel tube, can overcome the bigger problems of construction operation amount such as need setting up scaffold, formwork of building of bottom flange concrete slab in traditional corrugated steel web box girder and the formula web compound section, steel purlin.Owing to adopt concrete filled steel tube, also can improve the crack resistance of structure effectively, avoid the crack to expose etc., durability of structures can significantly improve.3. this structure adopts lower chord opening beam type, only uses support and connection between the rectangular steel pipe, the form advantages of simple, and structure height reduces, and can effectively reduce dead load, alleviates geological process, and reduces the cost of foundation.4. this structure lower edge horizontal support and diagonal brace also can be building of top flange concrete slab and provide support, and have reduced form work engineering and concrete wet trade workload and a die process, the industrialization degree height.Steel work partly is mainly prefabrication, and quality is easy to guarantee.
Description of drawings
Fig. 1 is traditional formula web compound section, steel purlin case beam schematic diagram.
Fig. 2 is traditional corrugated steel web case beam schematic diagram.
Fig. 3 is the lower chord opening beam type corrugated steel web combination beam schematic diagram.
Fig. 4 is a lower chord opening beam type corrugated steel web combination beam construction stage schematic diagram (when not building the top flange concrete slab).
Fig. 5 is the lower chord opening beam type corrugated steel web combination beam organigram.
Among the figure: the concrete slab of 1-top flange; 2-steel boom; 3-bottom flange concrete slab; The 4-corrugated steel web; The 5-steel plate; The 6-peg; The 7-rectangular steel pipe; 8-bracket A; 9-bracket B; The 10-horizontal support; The 11-diagonal brace; The interim tie-rod of 12-; 13-concrete spouting hole; 14-tension of prestressed tendon beam hole road; The 15-concrete.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
The invention provides and to reduce the construction operation amount that the combined box beam concreting is set up scaffold, a template etc. significantly, and can improve a kind of lower chord opening beam type corrugated steel web combination beam of structural bearing capacity, rigidity and cracking resistance.As Fig. 3～shown in Figure 5, this compound beam is made up of top flange concrete slab 1, corrugated steel web 4 and lower edge concrete-filled rectangular steel tube member, lower edge concrete-filled rectangular steel tube member adopts opens wide purlin formula structure, and this opens wide purlin formula structure by the concrete 15 of two rectangular steel pipes that be arranged in parallel 7 and inner perfusion thereof and be arranged on two horizontal support 10 and diagonal braces 11 between the rectangular steel pipe 7 and form; Inboard at rectangular steel pipe 7 need be welded bracket A8 and bracket B9 at a certain distance, be used to connect horizontal support 10 and diagonal brace 11 between rectangular steel pipe, and reserve the duct 14 of lower edge prestressed reinforcement of tensioning bundle in rectangular steel pipe 7 domestic demands, and reserve concrete spouting hole 13 at a certain distance at the steel pipe upper surface.
Working procedure of the present invention is:
Lower chord opening beam type corrugated steel web combination beam of the present invention is connect by the assembly (weldering) of steel work, and lower edge concrete filled steel tube (comprising the connection of support) and top flange concrete slab are built three parts and formed.Shown in Fig. 4～5, in factory corrugated steel web 4 and steel plate 5, lower edge rectangular steel pipe 7 are welded, melting welding shear connector peg 6 on steel plate 5, and weld bracket A8 and bracket B9 at a certain distance in rectangular steel pipe 7 inboards, reserve concrete spouting hole 13 at a certain distance at rectangular steel pipe 7 upper surfaces.Each Pin steel member is transported to the job site, carry out the location of steel work, two Pin steel members are coupled together with horizontal support 10 and diagonal brace 11 (sewing material as i iron or angle steel etc.) by bracket A8 and bracket B9, its top flange also adopts interim tie-rod 12 to connect simultaneously, after forming rock-steady structure, in lower edge rectangular steel pipe 7, reserved tension of prestressed tendon beam hole road 14, by concrete spouting hole 13, concrete 15 is injected in the rectangular steel pipe 7, after treating that concrete 15 reaches certain intensity, template, assembling reinforcement and the concreting of a top flange concrete slab 1.The lower edge concrete filled steel tube after structure is born working load, when distortion is not satisfied deformation requirements, should be provided with interim support in the steel pipe bottom according to computational analysis at a certain distance in work progress.
Claims (3)
1, a kind of lower chord opening beam type corrugated steel web combination beam, it is characterized in that: this compound beam is made up of top flange concrete slab (1), corrugated steel web (4) and lower edge concrete-filled rectangular steel tube member, described lower edge concrete-filled rectangular steel tube member adopts opens wide purlin formula structure, this opens wide purlin formula structure is by the rectangular steel pipe (7) of two parallel placements and the concrete (15) of inner perfusion, and the horizontal support (10) and the diagonal brace (11) that are arranged between described two rectangular steel pipes (7) are formed; In described rectangular steel pipe (7), reserve tension of prestressed tendon beam hole road (14).
2, according to the described a kind of lower chord opening beam type corrugated steel web combination beam of claim 1, it is characterized in that:, be used to connect two horizontal support and diagonal braces between the rectangular steel pipe at the inboard of described rectangular steel pipe (7) welding bracket A (8) and bracket B (9).
3, according to the described a kind of lower chord opening beam type corrugated steel web combination beam of claim 1, it is characterized in that: the upper surface at described rectangular steel pipe (7) is reserved concrete spouting hole (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100896324A CN100482892C (en) | 2007-10-19 | 2008-04-11 | Lower chord opening beam type corrugated steel web combination beam |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710176080.6 | 2007-10-19 | ||
| CNA2007101760806A CN101139812A (en) | 2007-10-19 | 2007-10-19 | Lower edge open truss style corrugated steel web combination beam |
| CNB2008100896324A CN100482892C (en) | 2007-10-19 | 2008-04-11 | Lower chord opening beam type corrugated steel web combination beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101280546A true CN101280546A (en) | 2008-10-08 |
| CN100482892C CN100482892C (en) | 2009-04-29 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101760806A Pending CN101139812A (en) | 2007-10-19 | 2007-10-19 | Lower edge open truss style corrugated steel web combination beam |
| CNB2008100896324A Expired - Fee Related CN100482892C (en) | 2007-10-19 | 2008-04-11 | Lower chord opening beam type corrugated steel web combination beam |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101760806A Pending CN101139812A (en) | 2007-10-19 | 2007-10-19 | Lower edge open truss style corrugated steel web combination beam |
Country Status (1)
| Country | Link |
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| CN (2) | CN101139812A (en) |
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-
2007
- 2007-10-19 CN CNA2007101760806A patent/CN101139812A/en active Pending
-
2008
- 2008-04-11 CN CNB2008100896324A patent/CN100482892C/en not_active Expired - Fee Related
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| CN103485477A (en) * | 2013-09-13 | 2014-01-01 | 北京工业大学 | Assembly type prestress corrugated web holding-on composite beam |
| CN103485479A (en) * | 2013-09-13 | 2014-01-01 | 北京工业大学 | Assembly type prestress honeycombed web composite beam |
| CN103485478A (en) * | 2013-09-13 | 2014-01-01 | 北京工业大学 | Prestress assembly type corrugation web holding-on combination beam applied to multi-story and high-rise buildings |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101139812A (en) | 2008-03-12 |
| CN100482892C (en) | 2009-04-29 |
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Granted publication date: 20090429 Termination date: 20110411 |