CN101845871B - Cast-in-place steel-concrete composite beam - Google Patents
Cast-in-place steel-concrete composite beam Download PDFInfo
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- CN101845871B CN101845871B CN2010102139129A CN201010213912A CN101845871B CN 101845871 B CN101845871 B CN 101845871B CN 2010102139129 A CN2010102139129 A CN 2010102139129A CN 201010213912 A CN201010213912 A CN 201010213912A CN 101845871 B CN101845871 B CN 101845871B
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Abstract
The invention discloses a cast-in-place steel-concrete composite beam, which relates to a composite beam. The cast-in-place steel-concrete composite beam solves the problems that a reinforced concrete beam and a column connection node in the existing steel structure and the existing steel-concrete composite structure have complex structures and are difficult to construct, the problems that a common composite beam has a large steel consumption and a high structure manufacturing cost, and the problems that a composite beam of which the publication number is CN101215855 is complex in operation and is inconvenient to construct when connected with a reinforced concrete wall column, and has low bearing capacity, small rigidity, weak spanning capacity, large fracture width for tensile region concrete and small application range. Bottom flanges of two I-shaped steel beam sections of the cast-in-place steel-concrete composite beam and a tensile region steel plate are made into an integral body; a longitudinal steel plate ribbed stiffener is connected through a fire-resisting longitudinal bar; top flanges of the two I-shaped steel beam sections are connected through a tensile region longitudinal bar; stirrups are uniformly arranged along the longitudinal direction of the fire-resisting longitudinal bar; floor steel bars are paved on a stiffening framework of the composite beam; and concrete is poured on the floor steel bars and the stiffening framework of the composite beam. The cast-in-place steel-concrete composite beam is applied to civil engineering constructions.
Description
Technical field
The present invention relates to a kind of compound beam, belong to technical field of civil engineering.
Background technology
Extensively adopt steel work or steel-concrete combined structure in multilayer, high level and super highrise building, wherein frame column usually adopts steel column or steel core concrete column or profile steel concrete column, and Vierendeel girder then adopts steel-concrete composite beam or reinforced concrete beam.Adopt steel-concrete composite beam to have advantages such as easy construction, speed of application is fast, bearing capacity is high, span ability is strong, steel using amount is big, needs adopt shortcomings such as suitable flameproof protection measure, structural cost height but also exist.Adopt reinforced concrete beam to have advantages such as fire resistance is good, structural cost is low, but exist from shortcoming such as great, that span ability is relatively little, particularly need multiple operation such as formwork, cast-in-place concrete, concrete curing, form removal, be unfavorable for bringing into play steel work and the fast characteristics of steel-concrete combined structure speed of application, and reinforced concrete beam and steel column or steel-concrete coupled column connected node complex structure, constructional difficulties, long construction period.
Based on the above, publication number is CN101215855, open day be that the application for a patent for invention on July 9th, 2008 has proposed a kind of compound beam, the compound beam described in the literary composition proposes at precast reinforced concrete beam is connected inconvenience with the steel concrete wall column problem.Described compound beam is by at the precast reinforced concrete beam end shaped steel being set, and pre-buried shaped steel joint in wall column utilizes precast beam beam-ends shaped steel and pre-buried shaped steel joint that precast reinforced concrete beam and steel concrete wall column are linked together then simultaneously; Be connected after the shaped steel of the precast reinforced concrete beam end setting of described compound beam and the precast beam split manufacturing in addition.To sum up, its essence of described compound beam or precast reinforced concrete beam, only be on connected node, to have adopted the shaped steel connection, it is connected or exists the problem of complicated operation and construction inconvenience with the steel concrete wall column, and also there is the problem that bearing capacity is low, rigidity is little, span ability is weak and the tensile region concrete crack width is big in described compound beam, simultaneously described compound beam also can't be applied in being connected of reinforced concrete beam and steel column, reinforced concrete beam and steel core concrete column and reinforced concrete beam and profile steel concrete column, and range of application is little.
Summary of the invention
The objective of the invention is in order to solve the problem of the reinforced concrete beam that exists in existing steel work and the steel-concrete combined structure and column jointing gusset complex structure, constructional difficulties; The steel using amount that common compound beam exists is big, needs adopt the suitable high problem of flameproof protection measure, structural cost; And publication number is being connected with the steel concrete wall column of existing of the compound beam of CN101215855, complicated operation, construction inconvenience, the problem that bearing capacity is low, rigidity is little, span ability is weak, the tensile region concrete crack width is big and range of application is little, and then a kind of cast-in-site steel-concrete composite beam is provided.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: a kind of cast-in-site steel-concrete composite beam of the present invention comprises two i section steel beam sections, the tensile region steel plate, the many vertical muscle of anti-fire, a plurality of stirrups, the many vertical muscle of pressure zone, four vertical steel plate stiffening ribs, four laterally short steel plate stiffening ribs, four horizontal long steel plate stiffening ribs and concrete, the longitudinal length of the top flange of each i section steel beam section is less than the longitudinal length of its bottom flange, the all rectangular trapezium structure of the web of each i section steel beam section, described two i section steel beam sections are along vertical setting of any one i section steel beam section, and the oblique waist of the web of two i section steel beam sections is oppositely arranged, be provided with the tensile region steel plate between the bottom flange of described two i section steel beam sections, and one is made in the bottom flange of tensile region steel plate and two i section steel beam sections, the both sides of the web of each i section steel beam section respectively are provided with a horizontal long steel plate stiffening rib, a vertical steel plate stiffening rib and a laterally short steel plate stiffening rib, laterally the two ends of long steel plate stiffening rib are connected with the bottom flange with the top flange respectively, vertically the steel plate stiffening rib be installed in the bottom flange on, its left end is connected with horizontal long steel plate stiffening rib, the upper end of laterally short steel plate stiffening rib is connected with the top flange, vertically connect by the vertical muscle of the many anti-fire that are set up in parallel between corresponding vertical steel plate stiffening rib on the bottom flange of described two i section steel beam sections, the end of the every vertical muscle of anti-fire all is welded on the upper surface of vertical steel plate stiffening rib, connect by the vertical muscle of the many pressure zones that are set up in parallel between the top flange of described two i section steel beam sections, the end of the every vertical muscle of pressure zone all is welded on the upper surface of corresponding top flange, described a plurality of stirrup is vertically evenly arranged along the vertical muscle of anti-fire, each stirrup is sleeved on many vertical muscle of anti-fire and the vertical muscle of Duo Gen pressure zone together, and the lower edge of each stirrup all is welded on the steel plate of tensile region, described two i section steel beam sections, the tensile region steel plate, the many vertical muscle of anti-fire, a plurality of stirrups, the many vertical muscle of pressure zone, four vertical steel plate stiffening ribs, four laterally short steel plate stiffening ribs and four laterally long steel plate stiffening ribs constitute the compound beam stiff skeleton, the i section steel beam section of compound beam stiff skeleton is connected by cantilever beam section and steel column or steel core concrete column or profile steel concrete column, floor bar is laid on the compound beam stiff skeleton, and concrete pouring is on floor bar and compound beam stiff skeleton.
The present invention compared with prior art has following effect: compound beam job practices of the present invention is identical with common steel-concrete composite beam, and simple to operate, speed of application is fast, has shortened construction period.The compound beam of this law invention, tensile region steel plate and i section steel beam section are an integral body, the vertical muscle of pressure zone links together by the welding and the i section steel beam section edge of a wing simultaneously, the lower edge of stirrup is welded on the steel plate of tensile region, make that the globality of compound beam is very good, have bearing capacity height, rigidity is big, span ability is strong and the tensile region concrete crack width is little advantage, and this compound beam is cast-in-place at the scene.The i section steel beam section is designed to the longitudinal length of the longitudinal length of top flange less than the bottom flange, the rectangular trapezium structure of web, make the present invention when implementing, be convenient to the cast of i section steel beam section concrete, and the height of steel web diminish and beam shearing distribution coordination mutually, more reasonable stress gradually.Compound beam of the present invention is applied to connect simple in being connected of reinforced concrete beam and steel column, reinforced concrete beam and steel core concrete column and reinforced concrete beam and profile steel concrete column.In addition, compound beam of the present invention has overcome reinforced concrete beam and steel column or steel-concrete coupled column connected node complexity, speed of application waits shortcoming slowly; Overcome the steel-concrete composite beam steel using amount big, need take shortcomings such as flameproof protection measure, structural cost height.
Description of drawings
Fig. 1 is an overall structure partial sectional perspective view of the present invention, Fig. 2 is the A-A sectional view of Fig. 1, Fig. 3 is the B-B sectional view of Fig. 1, Fig. 4 is the C-C sectional view of Fig. 1, Fig. 5 is the D-D sectional view of Fig. 1, Fig. 6 is that the present invention is connected the cast-in-place plated construction schematic diagram in shop with steel column 11, and Fig. 7 is that the present invention is connected the cast-in-place plated construction schematic diagram in shop with steel core concrete column 12, and Fig. 8 is that the present invention is connected the cast-in-place plated construction schematic diagram in shop with profile steel concrete column 13.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1-Fig. 8, a kind of cast-in-site steel-concrete composite beam of present embodiment comprises two i section steel beam sections 1, tensile region steel plate 2, the many vertical muscle 3 of anti-fire, a plurality of stirrups 4, the many vertical muscle 5 of pressure zone, four vertical steel plate stiffening rib 6-1, four laterally short steel plate stiffening rib 6-2, four horizontal long steel plate stiffening rib 6-3 and concrete seven, the longitudinal length of the top flange 1-1 of each i section steel beam section 1 is less than the longitudinal length of its bottom flange 1-3, the all rectangular trapezium structure of the web 1-2 of each i section steel beam section 1, described two i section steel beam sections 1 are along vertical setting of any one i section steel beam section 1, and the oblique waist of the web 1-2 of two i section steel beam sections 1 is oppositely arranged, be provided with tensile region steel plate 2 between the bottom flange 1-3 of described two i section steel beam sections 1, and the bottom flange 1-3 of tensile region steel plate 2 and two i section steel beam sections 1 makes one, the both sides of the web 1-2 of each i section steel beam section 1 respectively are provided with a horizontal long steel plate stiffening rib 6-3, a vertical steel plate stiffening rib 6-1 and a laterally short steel plate stiffening rib 6-2, laterally the two ends of long steel plate stiffening rib 6-3 are connected with bottom flange 1-3 with top flange 1-1 respectively, vertically steel plate stiffening rib 6-1 be installed in bottom flange 1-3 on, its left end is connected with horizontal long steel plate stiffening rib 6-3, the upper end of laterally short steel plate stiffening rib 6-2 is connected with top flange 1-1, the bottom flange 1-3 of described two i section steel beam sections 1 goes up vertically and connects by the vertical muscle 3 of the many anti-fire that are set up in parallel between corresponding vertical steel plate stiffening rib 6-1, the end of the every vertical muscle 3 of anti-fire all is welded on the upper surface of vertical steel plate stiffening rib 6-1, connect by the vertical muscle 5 of the many pressure zones that are set up in parallel between the top flange 1-1 of described two i section steel beam sections 1, the end of the every vertical muscle 5 of pressure zone all is welded on the upper surface of corresponding top flange 1-1, described a plurality of stirrup 4 is vertically evenly arranged along the vertical muscle 3 of anti-fire, each stirrup 4 is sleeved on many vertical muscle 3 of anti-fire and the vertical muscle 5 of Duo Gen pressure zone together, and the lower edge of each stirrup 4 all is welded on the tensile region steel plate 2, described two i section steel beam sections 1, tensile region steel plate 2, the many vertical muscle 3 of anti-fire, a plurality of stirrups 4, the many vertical muscle 5 of pressure zone, four vertical steel plate stiffening rib 6-1, four laterally short steel plate stiffening rib 6-2 and four laterally long steel plate stiffening rib 6-3 constitute the compound beam stiff skeleton, the i section steel beam section 1 of compound beam stiff skeleton is connected by cantilever beam section 10 and steel column 11 or steel core concrete column 12 or profile steel concrete column 13, floor bar 8 is laid on the compound beam stiff skeleton, and concrete seven is cast on floor bar 8 and the compound beam stiff skeleton.
The specific embodiment two: in conjunction with Fig. 1 present embodiment is described, the i section steel beam section 1 of present embodiment is made by Q235 steel, Q345 steel, Q390 steel or Q420 steel.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: in conjunction with Fig. 1 present embodiment is described, the tensile region steel plate 2 of present embodiment is made by Q235 steel, Q345 steel, Q390 steel or Q420 steel.Other composition is identical with the specific embodiment one or two with annexation.
The specific embodiment four: in conjunction with Fig. 1 present embodiment is described, vertical steel plate stiffening rib 6-1 of present embodiment, laterally short steel plate stiffening rib 6-2 and laterally long steel plate stiffening rib 6-3 make by Q235 steel, Q345 steel, Q390 steel or Q420 steel.Other composition is identical with the specific embodiment one, two or three with annexation.
The specific embodiment five: in conjunction with Fig. 1 present embodiment is described, the vertical muscle 3 of the anti-fire of present embodiment is that HPB235 or the clod wash of HRB335 reinforcing bar of 6 ~ 30mm is processed into by diameter.Other composition is identical with the specific embodiment one, two, three or four with annexation.
The specific embodiment six: in conjunction with Fig. 1 present embodiment is described, the vertical muscle 5 of the pressure zone of present embodiment is that HPB235 or the clod wash of HRB335 reinforcing bar of 6 ~ 30mm is processed into by diameter.Other composition is identical with the specific embodiment one, two, three, four or five with annexation.
The specific embodiment seven: in conjunction with Fig. 1 present embodiment is described, the stirrup 4 of present embodiment is that HPB235 or the clod wash of HRB335 reinforcing bar of 6 ~ 16mm is processed into by diameter.Other composition is identical with the specific embodiment one, two, three, four, five or six with annexation.
The specific embodiment eight: in conjunction with Fig. 1 present embodiment is described, the concrete seven of present embodiment is ordinary concrete, light weight aggregate concrete or the high performance concrete of C30 ~ C80.Other composition is identical with the specific embodiment one, two, three, four, five, six or seven with annexation.
The specific embodiment nine: in conjunction with Fig. 1 present embodiment is described, the compound beam of present embodiment also increases eight auxiliary steel plate stiffening rib 6-4, is provided with four auxiliary steel plate stiffening rib 6-4 on the upper surface of the top flange 1-1 of each i section steel beam section 1.Steel plate stiffening rib 6-4 strengthens the rigidity of top flange.Other composition is identical with the specific embodiment one, two, three, four, five, six, seven or eight with annexation.
Embodiment is (referring to Fig. 1-Fig. 8): after finishing the compound beam stiff skeleton, transport the compound beam stiff skeleton to job site, lifting puts in place, on this basis the i section steel beam section 1 of compound beam stiff skeleton is connected by cantilever beam section 10 and steel column 11 or steel core concrete column 12 or profile steel concrete column 13, carry out the formwork of compound beam and reinforced concrete floor 9, colligation floor bar 8, fluid concrete 7, maintenance reaches design strength.
Claims (9)
1. cast-in-site steel-concrete composite beam, it comprises two i section steel beam sections (1), tensile region steel plate (2), the many vertical muscle (3) of anti-fire, a plurality of stirrups (4), the many vertical muscle (5) of pressure zone, four vertical steel plate stiffening ribs (6-1), four laterally short steel plate stiffening ribs (6-2), four horizontal long steel plate stiffening ribs (6-3) and concrete (7), it is characterized in that: the longitudinal length of the top flange (1-1) of each i section steel beam section (1) is less than the longitudinal length of its bottom flange (1-3), the all rectangular trapezium structure of the web (1-2) of each i section steel beam section (1), described two i section steel beam sections (1) are along vertical setting of any one the i section steel beam section (1) in two i section steel beam sections (1), and the oblique waist of the web (1-2) of two i section steel beam sections (1) is oppositely arranged, be provided with tensile region steel plate (2) between the bottom flange (1-3) of described two i section steel beam sections (1), and tensile region steel plate (2) is made one with the bottom flange (1-3) of two i section steel beam sections (1), the both sides of the web (1-2) of each i section steel beam section (1) respectively are provided with a horizontal long steel plate stiffening rib (6-3), a vertical steel plate stiffening rib (6-1) and a laterally short steel plate stiffening rib (6-2), laterally the two ends of long steel plate stiffening rib (6-3) are connected with bottom flange (1-3) with top flange (1-1) respectively, vertically steel plate stiffening rib (6-1) is installed in the top of bottom flange (1-3), vertically steel plate stiffening rib (6-1) left end is connected with horizontal long steel plate stiffening rib (6-3), the upper end of laterally short steel plate stiffening rib (6-2) is connected with top flange (1-1), the bottom flange (1-3) of described two i section steel beam sections (1) is gone up vertically and is connected by the vertical muscle (3) of the many anti-fire that are set up in parallel between corresponding vertical steel plate stiffening rib (6-1), the end of the every vertical muscle (3) of anti-fire all is welded on the upper surface of corresponding vertically steel plate stiffening rib (6-1), connect by the vertical muscle (5) of the many pressure zones that are set up in parallel between the top flange (1-1) of described two i section steel beam sections (1), the end of the every vertical muscle (5) of pressure zone all is welded on the upper surface of top flange (1-1), described a plurality of stirrup (4) is vertically evenly arranged along the vertical muscle (3) of anti-fire, each stirrup (4) is sleeved on the many vertical muscle (3) of anti-fire and the many vertical muscle (5) of pressure zone together, and the lower edge of each stirrup (4) all is welded on the tensile region steel plate (2), described two i section steel beam sections (1), tensile region steel plate (2), the many vertical muscle (3) of anti-fire, a plurality of stirrups (4), the many vertical muscle (5) of pressure zone, four vertical steel plate stiffening ribs (6-1), four laterally short steel plate stiffening ribs (6-2) and four horizontal long steel plate stiffening ribs (6-3) constitute the compound beam stiff skeleton, the i section steel beam section (1) of compound beam stiff skeleton is connected by cantilever beam section (10) and steel column (11) or steel core concrete column (12) or profile steel concrete column (13), floor bar (8) is laid on the compound beam stiff skeleton, and concrete (7) is cast on floor bar (8) and the compound beam stiff skeleton.
2. according to the described a kind of cast-in-site steel-concrete composite beam of claim 1, it is characterized in that: i section steel beam section (1) is made by Q235 steel, Q345 steel, Q390 steel or Q420 steel.
3. according to claim 1 or 2 described a kind of cast-in-site steel-concrete composite beams, it is characterized in that: tensile region steel plate (2) is made by Q235 steel, Q345 steel, Q390 steel or Q420 steel.
4. according to the described a kind of cast-in-site steel-concrete composite beam of claim 3, it is characterized in that: vertically steel plate stiffening rib (6-1), laterally short steel plate stiffening rib (6-2) and horizontal long steel plate stiffening rib (6-3) are made by Q235 steel, Q345 steel, Q390 steel or Q420 steel.
5. according to claim 1 or 4 described a kind of cast-in-site steel-concrete composite beams, it is characterized in that: the vertical muscle (3) of anti-fire is that HPB235 or the clod wash of HRB335 reinforcing bar of 6～30mm is processed into by diameter.
6. according to the described a kind of cast-in-site steel-concrete composite beam of claim 5, it is characterized in that: it is that HPB235 or the clod wash of HRB335 reinforcing bar of 6～30mm is processed into by diameter that pressure zone is indulged muscle (5).
7. according to the described a kind of cast-in-site steel-concrete composite beam of claim 6, it is characterized in that: stirrup (4) is that HPB235 or the clod wash of HRB335 reinforcing bar of 6～16mm is processed into by diameter.
8. according to claim 1,6 or 7 described a kind of cast-in-site steel-concrete composite beams, it is characterized in that: concrete (7) is the ordinary concrete of light weight aggregate concrete, high performance concrete or C30～C80.
9. according to claim 1,4,6 or 7 described a kind of cast-in-site steel-concrete composite beams, it is characterized in that: compound beam also comprises eight auxiliary steel plate stiffening ribs (6-4), is provided with four auxiliary steel plate stiffening ribs (6-4) on the upper surface of the top flange (1-1) of each i section steel beam section (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102139129A CN101845871B (en) | 2010-06-30 | 2010-06-30 | Cast-in-place steel-concrete composite beam |
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| CN2010102139129A CN101845871B (en) | 2010-06-30 | 2010-06-30 | Cast-in-place steel-concrete composite beam |
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| CN101845871B true CN101845871B (en) | 2011-07-27 |
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