CN103924734A - Batten plate constraint type I-shaped steel bone confined concrete column and fabrication method thereof - Google Patents
Batten plate constraint type I-shaped steel bone confined concrete column and fabrication method thereof Download PDFInfo
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- CN103924734A CN103924734A CN201410140901.0A CN201410140901A CN103924734A CN 103924734 A CN103924734 A CN 103924734A CN 201410140901 A CN201410140901 A CN 201410140901A CN 103924734 A CN103924734 A CN 103924734A
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Abstract
The invention relates to a steel bone concrete column, and particularly relates to a batten plate constraint type I-shaped steel bone confined concrete column. The batten plate constraint type I-shaped steel bone confined concrete column disclosed by the invention comprises an I-shaped steel bone, constraint batten plates, longitudinal reinforcement, a composite stirrup and concrete, wherein the constraint batten plates are respectively welded and connected with two flanges, at the free edges of the flanges, of the I-shaped steel bone in a sectioning manner, so that the free extension length of each flange is effectively reduced, buckling deformation of the flanges is constrained, and meanwhile, the inspection capability of internal concrete of the steel bone is enhanced by existence of the constraint batten plates. The constraint batten plates are arranged at intervals, and the internal part of the steel bone is communicated with external concrete in series, so that the pouring quality of the concrete is ensured. Therefore, the concrete disclosed by the invention has the relatively high strength and the good elastic-plastic deformation capacity, and the formed steel bone concrete column has the relatively high bearing capacity, ductility and energy-dissipating capacity.
Description
Technical field
The present invention relates to a kind of batten plate restricted type I-shaped reinforcing bar confined concrete post and the practice, be mainly used in the energy dissipation field in building structure.
Background technology
Steel reinforced concrete structure refers to configure the combined structure system of reinforcing bar in ordinary reinforced concrete structure.In steel reinforced concrete structure, reinforcing bar can be divided into two kinds of real abdomen formula and open web types.Real abdomen formula steel reinforced concrete member has good anti-seismic performance, and the anti-seismic performance of open web type steel reinforced concrete member and ordinary reinforced concrete member are basic identical.Therefore, in earthquake resistant structure, adopt at present real abdomen formula steel reinforced concrete member more.Real abdomen formula reinforcing bar can form or directly adopt rolled section steel by the Plate Welding system of spelling.
Research shows, in the situation that the certain structure of configuration requires flexible reinforcing bar, steel and the collaborative work of concrete energy in steel reinforced concrete structure, until the bearing capacity that reaches capacity; Steel reinforced concrete structure combines the two advantage of steel work and reinforced concrete structure.Compare with steel work, it has larger rigidity and damping, is conducive to the distortion of control structure; External wrapping concrete can play reinforcing bar corrosion and the effect that improves structure fire resistance performance of preventing; External wrapping concrete also can prevent reinforcing bar cripling, reinforcing bar intensity is fully used, saving steel.With reinforced concrete structure, compare, reinforcing bar has improved bearing capacity and the ductility of structure, is conducive to reduce sectional dimension of members, is conducive to structural seismic; The reinforcing bar structural system that own formation can independent bearing before concrete casting in steel reinforced concrete, can bear construction live load and dead load, without temporary supporting is set, in multi-rise building, needn't wait for after concrete reaches some strength and constructing again, can shorten the construction period.
In structure design, because architectural design needs, the sectional dimension of post is restricted sometimes, when adopting combined steel and concrete column, often by improving cross section, joins steel rate to improve its bearing capacity and ductility.As built-in I-shaped reinforcing bar profile steel concrete column, except adopting the method for increase steel plate thickness to improve, join steel rate, can also adopt the method that increases the edge of a wing.Experimental study shows, when there is moderate finite deformation in the loading later stage, because the built-in free extension in the I-shaped reinforcing bar profile steel concrete column reinforcing bar edge of a wing of being with is larger, when flakiness ratio is larger, can there is certain bending deformation, reinforcing bar declines to concrete restriction ability, then whole profile steel concrete column depression of bearing force.Therefore, when edge of a wing flakiness ratio hour, should adopt effective measures to retrain its bending deformation, to improve bearing capacity and the ductility of whole concrete column.
Summary of the invention
Technical problem to be solved by this invention is: the bearing capacity and the ductility that improve built-in I-shaped reinforcing bar confined concrete post, delay or avoid the reduction due to stiffness of structural member, bearing capacity and ductility that edge of a wing flexing causes, give full play to the performance of material, simultaneously constructability.In order to address this problem, the present invention proposes batten plate restricted type I-shaped reinforcing bar confined concrete post and the practice.
The technical solution used in the present invention is:
The I-shaped reinforcing bar confined concrete of this batten plate restricted type post, comprises I-shaped reinforcing bar 1, constraint batten plate 2, longitudinal reinforcement 3, compound stirrup 4, concrete 5; Constraint batten plate 2 is welded to connect with two edges of a wing free margins punishment section outside the edge of a wing of I-shaped reinforcing bar 1 respectively, in reinforcing bar outside, along post limit, arrange longitudinal reinforcement 3, and configuring compound stirrup 4 constraint longitudinal reinforcement 3 and inner concrete 5, compound stirrup 4 retrains between batten plates in neighbouring two along level configurations.
The described I-shaped reinforcing bar confined concrete of batten plate restricted type post is rectangle or square-section.
Described I-shaped reinforcing bar 1 is welded by high strength steel plate or adopts hot rolling i iron, cross sectional shape is I-shaped.
Described constraint batten plate 2 is high-strength rectangular steel plates, along high, evenly arranges, and thickness of section is not less than I-shaped reinforcing bar 1 edge of a wing steel plate, and depth of section is less than 1 with the ratio of neighbouring two constraint batten plate spacing.
Described longitudinal reinforcement 3 is high tensile reinforcement, along post limit, evenly configures.
Described compound stirrup 4 is high tensile reinforcement, by the two limb stirrups of rectangle and the two limb stirrups of hexagon, is composited, and suspension column position reduces spacing and encrypts layout, and other positions are evenly arranged.
Described concrete 5 is high-strength concrete, and strength grade of concrete is greater than C50.
According to technical scheme of the present invention, the I-shaped reinforcing bar confined concrete of this batten plate restricted type post, its making step is as follows:
1) the I-shaped reinforcing bar 1 of prefabrication;
2) position constraint batten plate 2 and with the edge of a wing welding of I-shaped reinforcing bar 1;
3) reinforcing bar member prefabrication being welded is transported to behind on-the-spot and location, colligation longitudinal reinforcement 3 and compound stirrup 4;
4) formwork supporting plate concrete perfusion 5, carry out maintenance;
5), when concrete reaches after intensity, form the I-shaped reinforcing bar confined concrete of batten plate restricted type post.
The present invention can obtain following beneficial effect:
The present invention adopts constraint batten plate that the edge of a wing part of I-shaped reinforcing bar has been carried out to effective drawknot, reduced the own extension on the edge of a wing, retrained the bending deformation on the edge of a wing, the existence that simultaneously retrains batten plate makes reinforcing bar strengthen the concrete restriction ability in its inside, has brought into play the effect that is similar to steel pipe in steel core concrete column; Longitudinally distribution reinforcement and compound stirrup have good restriction ability equally to its inside concrete, with the inner concrete of reinforcing bar double constraints, and compound stirrup is arranged between neighbouring constraint batten plate, constraint batten plate gap inner concrete is had to good effect of contraction; Constraint batten plate interval layout, reinforcing bar is inner gangs up mutually with outside concrete, has guaranteed concrete pouring quality; Several respects factor to sum up, the concrete in the present invention has higher intensity and good ability of elastic-plastic deformation, and the combined steel and concrete column of formation has higher bearing capacity, ductility and energy dissipation capacity.
The present invention adopts the form of external wrapping concrete, than steel core concrete column, has good fire-resistant, corrosion resistance, is conducive to reduce old of maintenance in use procedure.
Accompanying drawing explanation
Fig. 1 is the I-shaped reinforcing bar confined concrete of batten plate restricted type post stereogram;
Fig. 2 is the I-shaped reinforcing bar confined concrete of batten plate restricted type column section figure;
Wherein: the I-shaped reinforcing bar of 1-, 2-retrains batten plate, 3-longitudinal reinforcement, 4-compound stirrup, 5-concrete.
The specific embodiment
Below in conjunction with instantiation, the present invention will be further described:
Embodiment
As shown in Figure 1 and Figure 2, the I-shaped reinforcing bar confined concrete of this batten plate restricted type post, comprises I-shaped reinforcing bar 1, constraint batten plate 2, longitudinal reinforcement 3, compound stirrup 4, concrete 5; It is on built-in I-shaped reinforcing bar concrete column basis, to set up constraint batten plate to form.
According to technical scheme of the present invention, the I-shaped reinforcing bar confined concrete of this batten plate restricted type post, its making step is as follows:
1) prefabrication welding I-section reinforcing bar 1;
2) position constraint batten plate 2 and with the edge of a wing welding of I-shaped reinforcing bar 1;
3) reinforcing bar member prefabrication being welded is transported to behind on-the-spot and location, colligation longitudinal reinforcement 3 and compound stirrup 4;
4) formwork supporting plate concrete perfusion 5, carry out maintenance;
5), when concrete reaches after intensity, form the I-shaped reinforcing bar confined concrete of batten plate restricted type post.
Be more than exemplary embodiments of the present invention, enforcement of the present invention is not limited to this.
Claims (8)
1. the I-shaped reinforcing bar confined concrete of batten plate restricted type post, is characterized in that: it comprises I-shaped reinforcing bar (1), constraint batten plate (2), longitudinal reinforcement (3), compound stirrup (4), concrete (5); Constraint batten plate (2) is welded to connect in edge of a wing free margins punishment section with two edges of a wing of I-shaped reinforcing bar (1) respectively, longitudinal reinforcement (3) is arranged in reinforcing bar outside along post limit, and configuring compound stirrup (4) constraint longitudinal reinforcement (3) and inner concrete (5), compound stirrup (4) retrains between batten plates (2) in neighbouring two along level configurations.
2. the I-shaped reinforcing bar confined concrete of batten plate restricted type according to claim 1 post, is characterized in that: its cross sectional shape is rectangle or square.
3. the I-shaped reinforcing bar confined concrete of batten plate restricted type according to claim 1 post, is characterized in that: I-shaped reinforcing bar (1) is welded by high strength steel plate or directly adopts hot rolling i iron, cross sectional shape is I-shaped.
4. the I-shaped reinforcing bar confined concrete of batten plate restricted type according to claim 1 post, it is characterized in that: constraint batten plate (2) is high-strength rectangular steel plates, along high, evenly arrange, thickness of section is not less than I-shaped reinforcing bar (1) edge of a wing steel plate, and depth of section is less than 1 with the ratio of neighbouring two constraint batten plate spacing.
5. the I-shaped reinforcing bar confined concrete of batten plate restricted type according to claim 1 post, is characterized in that: longitudinal reinforcement (3) is high tensile reinforcement, along post limit, evenly configures.
6. the I-shaped reinforcing bar confined concrete of batten plate restricted type according to claim 1 post, is characterized in that: compound stirrup (4) is high tensile reinforcement, by the two limb stirrups of rectangle and the two limb stirrups of hexagon, is composited.
7. the I-shaped reinforcing bar confined concrete of batten plate restricted type according to claim 1 post, is characterized in that: concrete (5) strength grade is greater than C50.
8. according to the preparation method of the I-shaped reinforcing bar confined concrete of the batten plate restricted type post described in claim 1-7 any one, it is characterized in that, step is as follows:
1) the I-shaped reinforcing bar of prefabrication (1);
2) position constraint batten plate (2) and with the edge of a wing welding of I-shaped reinforcing bar (1);
3) reinforcing bar member prefabrication being welded is transported to behind on-the-spot and location, colligation longitudinal reinforcement (3) and compound stirrup (4);
4) formwork supporting plate concrete perfusion (5), carry out maintenance;
5), when concrete (5) maintenance is after 28 days, form the I-shaped reinforcing bar confined concrete of batten plate restricted type post.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410140901.0A CN103924734A (en) | 2014-04-10 | 2014-04-10 | Batten plate constraint type I-shaped steel bone confined concrete column and fabrication method thereof |
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| CN201410140901.0A CN103924734A (en) | 2014-04-10 | 2014-04-10 | Batten plate constraint type I-shaped steel bone confined concrete column and fabrication method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106639148A (en) * | 2017-01-25 | 2017-05-10 | 山东大学 | Concrete beam column with steel plate mesh framework and structure design method thereof |
| CN109972855A (en) * | 2019-04-26 | 2019-07-05 | 贵州中建建筑科研设计院有限公司 | A kind of reconstruction structure of old building brick column |
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Application publication date: 20140716 |