CN104481164B - The section steel reinforcement method of concrete frame node and add fixing structure - Google Patents
The section steel reinforcement method of concrete frame node and add fixing structure Download PDFInfo
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- CN104481164B CN104481164B CN201410680241.5A CN201410680241A CN104481164B CN 104481164 B CN104481164 B CN 104481164B CN 201410680241 A CN201410680241 A CN 201410680241A CN 104481164 B CN104481164 B CN 104481164B
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Abstract
A section steel reinforcement method for concrete frame node, belongs to technical field of buildings. Post place orthogonal with beam on beam and under beam all arranges beam-post and reinforces angle steel, the corner of post adopts and reinforces, adopting 2 posts to reinforce channel-section steel hoops and respectively 4 beams-post of upper post and lower post will be reinforced angle steel and 4 corners reinforce angle steel rings to encasing, every root beams of concrete all adopts 2 beams to reinforce channel-section steel hoops and beam-post is reinforced angle steel and beams of concrete ring to encasing. The effect of the present invention and advantage to reduce operation, simplification construction, and can effectively utilize shaped steel, significantly promotes the stress performance of concrete frame node.
Description
Technical field
The invention belongs to technical field of buildings, particularly relate to a kind of section steel reinforcement method of concrete frame node and add fixing structure.
Background technology
Node is the hinge of skeleton construction power transmission, plays a part to transmit and distribution internal force, guarantee globality. Under earthquake action, joint cores undergos very big horizontal shearing, is generally about 4��6 times of pillar shearing, easily produces shear brittleness and destroys. In addition owing to the effect of cyclic reverse loading causes reinforcing bar bonding to be degenerated, there is reinforcing bar fastening destruction, thus greatly reduce the intensity of node, rigidity and energy dissipation capacity. Node, once destruction, can make structure be in totally unfavorable strained condition, even cause collapsing of whole structure. In order to avoid node to destroy prior to beam post component, using " the weak component of strong node " as principle of design in resistance of Reinforced Concrete Frames shake design. When frame joint is due to design, construction wrong, or using function, environment for use change, or structural seismic requiring, the reasons such as raising cause Lack of support, and ductility, rigidity are inadequate, or when anti-seismic performance is not enough, it need to be carried out reinforcement and strengthening.
To the seismic hardening of reinforced concrete frame structure in current engineering, normally strengthen beam cross-section or stick carbon fiber material etc. and increase beam post element bearing capacity, and seldom or be difficult to be reinforced by node, this kind adds solid method and skeleton construction is resisted " no collapsing with strong earthquake " almost without any effect.
Reinforcement method of enlarging section is the section area adopting and increasing concrete frame node, adds solid method to improve the one of its bearing capacity. The method increase the shearing resistance sectional area of joint cores, thus improve slip resistance and rigidity; Strengthen the anchoring of the vertical muscle of beam in node area, can effectively avoid beam-ends that this brittle rupture form of fastening destruction occurs. Under the prerequisite not affecting using function, it is very effective for carrying out reinforcing joint by enlarging section, but its main drawback is: dabbing is all wanted on beam post surface, and wet trade is many, and strengthening construction difficulty is big.
Namely sticking carbon fiber method for strengthening is at concrete member paste outside carbon fibre material, with improve bearing capacity and meet normal use add solid method. Its obvious technical superiority is mainly reflected in: efficiently high-strength, make full use of FRP high strength, high-modulus feature to improve bearing capacity and the ductility of structure and component, improve its stress performance, corrosion resistance nature and weather resistance; The chemical property of FRP material is stablized, and does not react with the chemical substance such as acid-alkali salt, does not increase deadweight and the volume of component, constructability.
Relevant experimental study shows, during sticking carbon fiber reinforcing joint, the effect of node stress performance is mainly manifested in following two aspects by carbon fiber:
First, constrain the concrete horizontal volumetric expansion in joint cores, the restriction concrete cracking in joint cores and the further developing of crack, to core area concrete with ring to pressure, indirectly improve concrete ultimate compression strength.
Secondly, directly undertake external load, participate in the shearing resistance of node, the restriction concrete shearing strain in joint cores. The shearing strain of node is the same with the bar bond slip of the vertical muscle of beam, and load-displacement hysteresis loop can be made to produce to pinch contracting, and energy dissipation capacity reduces, and the displacement of structure is strengthened. Testing proof in a large number, between the layer of reinforced concrete frame structure in displacement, the shearing strain of node to be accounted for 40%��60%, therefore, no matter considers from power consumption or the angle of Reducing distortion, all should limit the shearing strain of node.
Reinforcement by sticking of sheets is at the special construction structure glue affixing steel plate of component surface, adds solid method to improve the one of structural bearing capacity. Adopting steel-bonded reinforcement bean column node, the steel plate be namely pasted with bending resistance in the beam-ends of beam-column subassemblage node region, post end or core area, cutting or angle steel, to improve the shear-carrying capacity of node area or to improve the stress performance of joint cores.
This adds solid method and has the following advantages: is reinforced component and does not substantially suffer a loss, it is possible to give full play to the effect of original part; External debts model thickness is little, and after reinforcing, deadweight increases little; After reinforcing, the physical dimension change of component is little, and building function impact is less. Meanwhile, dead burning plate is reinforced also exists following shortcoming: steel are for solving protection against corrosion problem, and certain thickness surface layer should be made in surface, thus have also been changed sectional dimension of members, brings difficulty to finishing; Steel plate lapping and anchoring comparatively bothers, and engineering amount is bigger. Therefore develop concrete frame node add solid method reinforce simple effective ways very necessary.
Summary of the invention
For the technical problem of above-mentioned existence, the present invention provides a kind of section steel reinforcement method of concrete frame node and adds fixing structure, can not only reduce operation, simplify construction, and can effectively utilize shaped steel, significantly promote the stress performance of concrete frame node.
It is an object of the invention to be achieved through the following technical solutions:
The section steel reinforcement method of concrete frame node of the present invention, its concrete frame node is reinforced channel-section steel hoop, beam reinforcing channel-section steel hoop, corner reinforcing angle steel, post reinforcing channel-section steel hoop crab-bolt, beam reinforcing channel-section steel hoop crab-bolt and joint cores formed by beams of concrete, coagulation earth pillar, beam-post reinforcing angle steel, post, first, post place orthogonal with beam on beam and under beam all arranges beam-post and reinforces angle steel, and the width a of beam-post reinforcing angle steel equals the width b of beam; The employing corner, corner of post reinforces angle steel and reinforces, the post that corner reinforces the upper end of angle steel and the upper post of coagulation earth pillar reinforces channel-section steel hoop upper limb with high, the post of the lower post of lower end and coagulation earth pillar reinforces channel-section steel hoop lower rim with high, and centre encases 4 angles of the post of joint cores; The width w that the width a sum of angle steel is coagulation earth pillar reinforced by the width c of 2 corner reinforcing angle steel and beam-post;
Secondly, adopting 2 posts to reinforce channel-section steel hoop and respectively 4 beams-post reinforcing angle steel and 4 corners of upper post and lower post are reinforced angle steel rings to encasing, 2 seams of post reinforcing channel-section steel hoop adopt and are welded to connect; Angle steel reinforced by coagulation earth pillar and beam-post and corner reinforces between angle steel, and adopt structure glue to cohere between beam-post reinforcing angle steel and corner reinforcing angle steel and post reinforcing channel-section steel hoop, and channel-section steel hoop reinforced by post by channel-section steel hoop crab-bolt, the Steel concrete post connection of reinforcing angle, angle steel corner reinforced by beam-post to adopt post to reinforce;
Finally, every root beams of concrete all adopts 2 beams to reinforce channel-section steel hoops and beam-post is reinforced angle steel and beams of concrete ring to encasing, and 2 seams that beam reinforces channel-section steel hoop lay respectively at the centre of beams of concrete top and bottom, and adopt and be welded to connect; Beams of concrete and beam-post are reinforced between angle steel, and all adopt structure glue to cohere between beam-post reinforcing angle steel and beam reinforcing channel-section steel hoop, and adopt beam reinforcing channel-section steel hoop crab-bolt beam-post reinforcing angle steel and beam to reinforce channel-section steel hoop and be connected with beams of concrete.
The section steel reinforcement structure of the concrete frame node of the present invention, by beams of concrete, coagulation earth pillar, angle steel reinforced by beam-post, channel-section steel hoop reinforced by post, beam reinforces channel-section steel hoop, corner reinforces angle steel, channel-section steel hoop crab-bolt reinforced by post, beam reinforces channel-section steel hoop crab-bolt and joint cores forms, post place orthogonal with beam on beam and under beam all arranges beam-post and reinforces angle steel, and the width a of beam-post reinforcing angle steel equals the width b of beam; The corner of post reinforces angle steel by corner and reinforces, the post that corner reinforces the upper end of angle steel and the upper post of coagulation earth pillar reinforces channel-section steel hoop upper limb with high, the post of the lower post of lower end and coagulation earth pillar reinforces channel-section steel hoop lower rim with high, is set in outside 4 angles of post of joint cores; The width w that the width a sum of angle steel is coagulation earth pillar reinforced by the width c of 2 corner reinforcing angle steel and beam-post;
Reinforcing channel-section steel hoop 4 beams-post that ring loads onto post and lower post to cover respectively by 2 posts and reinforce angle steel and 4 corners reinforcing angle steel, post reinforces 2 seams of channel-section steel hoop for being welded to connect; Angle steel reinforced by coagulation earth pillar and beam-post and corner reinforces between angle steel, and angle steel reinforced by beam-post and corner reinforces angle steel and post is reinforced for structure glue is cohered between channel-section steel hoop, and by post reinforcing channel-section steel hoop crab-bolt, post is reinforced channel-section steel hoop, beam-post reinforcing angle steel and reinforcing angle, corner Steel concrete post and connect;
Every root beams of concrete all reinforces channel-section steel hoop by fixing to suit to beam-post reinforcing angle steel and beams of concrete ring by 2 beams, and 2 seams of beam reinforcing channel-section steel hoop lay respectively at the centre of beams of concrete top and bottom, and by being welded to connect; Beams of concrete and beam-post is reinforced between angle steel, and angle steel reinforced by beam-post and beam is reinforced and is structure glue between channel-section steel hoop and coheres, and reinforces channel-section steel hoop crab-bolt by beam and beam-post reinforces angle steel and beam is reinforced channel-section steel hoop and is connected with beams of concrete.
The useful effect of the present invention is:
The effect of the present invention and advantage to reduce operation, simplification construction, and can effectively utilize shaped steel, significantly promotes the stress performance of concrete frame node.
Accompanying drawing explanation
Fig. 1 is the floor map of the section steel reinforcement method of concrete frame node;
Fig. 2 is the elevational schematic view of the section steel reinforcement method of concrete frame node.
In figure, 1 is beams of concrete; 2 is coagulation earth pillar; 3 is that angle steel reinforced by beam-post; 4 is post reinforcing channel-section steel hoop; 5 is beam reinforcing channel-section steel hoop; 6 is corner reinforcing angle steel; 7 is post reinforcing channel-section steel hoop crab-bolt; 8 is beam reinforcing channel-section steel hoop crab-bolt; 9 is joint cores.
Embodiment
Below by embodiment and accompanying drawing, the invention will be further described.
Embodiment: the section steel reinforcement structure of a kind of concrete frame node of the present invention and to add solid method as follows: its add fixing structure by beams of concrete 1, coagulation earth pillar 2, angle steel 3 reinforced by beam-post, channel-section steel hoop 4 reinforced by post, beam reinforces channel-section steel hoop 5, corner reinforces angle steel 6, channel-section steel hoop crab-bolt 7 reinforced by post, beam reinforces channel-section steel hoop crab-bolt 8 and joint cores 9 forms, during construction, first, post place orthogonal with beam on beam and under beam all arranges beam-post and reinforces angle steel 3, and the width a of beam-post reinforcing angle steel 3 equals the width b of beam; The employing corner, corner of post reinforces angle steel 6 and reinforces, and the post of the upper end of 6 and the upper post of coagulation earth pillar 2 reinforces channel-section steel hoop 4 upper limb with high, and the post of the lower post of lower end and coagulation earth pillar 2 reinforces channel-section steel hoop 4 lower rim with high, and centre encases 4 angles of the post of joint cores 9; The width w that the width a sum of angle steel 3 is coagulation earth pillar 2 reinforced by the width c of 26 and beam-post;
Secondly, angle steel 3 reinforced by 4 beams-post adopting 2 posts reinforcing channel-section steel hoops 4 to be set with post and lower post and 4 corners reinforce angle steel 6, and with ring to encasing, 2 seams of post reinforcing channel-section steel hoop 4 adopt and are welded to connect; Angle steel 3 reinforced by coagulation earth pillar 2 and beam-post and corner reinforces between angle steel 6, and adopt structure glue to cohere between beam-post reinforcing angle steel 3 and corner reinforcing angle steel 6 and post reinforcing channel-section steel hoop 4, and channel-section steel hoop 4 reinforced by post by channel-section steel hoop crab-bolt 7, angle steel 3 reinforced by beam-post and corner reinforcing angle steel 6 is connected with coagulation earth pillar 2 to adopt post to reinforce;
Finally, every root beams of concrete 1 all adopts 2 beams to reinforce channel-section steel hoops 5 and beam-post is reinforced angle steel 3 and beams of concrete 1 ring to encasing, and 2 seams that beam reinforces channel-section steel hoop 5 lay respectively at the centre of beams of concrete 1 top and bottom, and adopt and be welded to connect; Beams of concrete 1 and beam-post are reinforced between angle steel 3, and all adopt structure glue to cohere between beam-post reinforcing angle steel 3 and beam reinforcing channel-section steel hoop 5, and adopt beam reinforcing channel-section steel hoop crab-bolt 8 that beam-post reinforcing angle steel 3 and beam are reinforced channel-section steel hoop 5 and be connected with beams of concrete 1.
Claims (2)
1. the section steel reinforcement method of a concrete frame node, its concrete frame node is by beams of concrete (1), coagulation earth pillar (2), angle steel (3) reinforced by beam-post, channel-section steel hoop (4) reinforced by post, beam reinforces channel-section steel hoop (5), corner reinforces angle steel (6), channel-section steel hoop crab-bolt (7) reinforced by post, beam reinforces channel-section steel hoop crab-bolt (8) and joint cores (9) composition, it is characterized in that: first, post place orthogonal with beam on beam and under beam all arranges beam-post and reinforces angle steel (3), the width a of beam-post reinforcing angle steel (3) equals the width b of beam, the employing corner, corner of post reinforces angle steel (6) and reinforces, the post that corner reinforces the upper end of angle steel (6) and the upper post of coagulation earth pillar (2) reinforces channel-section steel hoop (4) upper limb with high, the post of the lower post of lower end and coagulation earth pillar (2) reinforces channel-section steel hoop (4) lower rim with high, and centre encases 4 angles of the post of joint cores (9), the width w that the width a sum of angle steel (3) is coagulation earth pillar (2) reinforced by the width c of 2 corners reinforcing angle steel (6) and beam-post,
Secondly, adopting 2 posts to reinforce channel-section steel hoop (4) and respectively 4 beams-post reinforcing angle steel (3) and 4 corners of upper post and lower post are reinforced angle steel (6) rings to encasing, 2 seams employings that channel-section steel hoop (4) reinforced by post are welded to connect; Angle steel (3) reinforced by coagulation earth pillar (2) and beam-post and corner reinforces between angle steel (6), and beam-adopt structure glue to cohere between post reinforcing angle steel (3) and corner reinforcing angle steel (6) and post reinforcing channel-section steel hoop (4), and channel-section steel hoop (4) reinforced by post by channel-section steel hoop crab-bolt (7), angle steel (3) reinforced by beam-post and corner reinforcing angle steel (6) is connected with coagulation earth pillar (2) to adopt post to reinforce;
Finally, every root beams of concrete (1) all adopts 2 beams to reinforce channel-section steel hoop (5) and beam-post is reinforced angle steel (3) and beams of concrete (1) ring to encasing, 2 seams of beam reinforcing channel-section steel hoop (5) lay respectively at the centre of beams of concrete (1) top and bottom, and adopt and be welded to connect; Beams of concrete (1) and beam-post are reinforced between angle steel (3), and beam-all adopt structure glue to cohere between post reinforcing angle steel (3) and beam reinforcing channel-section steel hoop (5), and adopt beam to reinforce channel-section steel hoop crab-bolt (8) and beam-post reinforcing angle steel (3) and beam reinforcing channel-section steel hoop (5) are connected with beams of concrete (1).
2. the section steel reinforcement structure of a concrete frame node, it is characterized in that: by beams of concrete (1), coagulation earth pillar (2), angle steel (3) reinforced by beam-post, channel-section steel hoop (4) reinforced by post, beam reinforces channel-section steel hoop (5), corner reinforces angle steel (6), channel-section steel hoop crab-bolt (7) reinforced by post, beam is reinforced channel-section steel hoop crab-bolt (8) and joint cores (9) and formed, post place orthogonal with beam on beam and under beam all arranges beam-post and reinforces angle steel (3), and the width a of beam-post reinforcing angle steel (3) equals the width b of beam; The corner of post reinforces angle steel (6) by corner and reinforces, the post that corner reinforces the upper end of angle steel (6) and the upper post of coagulation earth pillar (2) reinforces channel-section steel hoop (4) upper limb with high, the post of the lower post of lower end and coagulation earth pillar (2) reinforces channel-section steel hoop (4) lower rim with high, is set in outside 4 angles of post of joint cores (9); The width w that the width a sum of angle steel (3) is coagulation earth pillar (2) reinforced by the width c of 2 corners reinforcing angle steel (6) and beam-post;
Reinforcing channel-section steel hoop (4) 4 beams-post that ring loads onto post and lower post to cover respectively by 2 posts and reinforce angle steel (3) and 4 corners reinforcing angle steel (6), post reinforces 2 seams of channel-section steel hoop (4) for being welded to connect; Angle steel (3) reinforced by coagulation earth pillar (2) and beam-post and corner reinforces between angle steel (6), and beam-post reinforces angle steel (3) and corner reinforces angle steel (6) and reinforces for structure glue is cohered between channel-section steel hoop (4) with post, and by post reinforcing channel-section steel hoop crab-bolt (7), post is reinforced channel-section steel hoop (4), beam-post reinforcing angle steel (3) and corner reinforcing angle steel (6) and it is connected with coagulation earth pillar (2);
Every root beams of concrete (1) all reinforces channel-section steel hoop (5) by fixing to suit to beam-post reinforcing angle steel (3) and beams of concrete (1) ring by 2 beams, 2 seams of beam reinforcing channel-section steel hoop (5) lay respectively at the centre of beams of concrete (1) top and bottom, and by being welded to connect; Beams of concrete (1) and beam-post are reinforced between angle steel (3), and beam-post reinforces angle steel (3) and beam is reinforced and is structure glue between channel-section steel hoop (5) and coheres, and reinforce channel-section steel hoop crab-bolt (8) by beam and beam-post reinforced angle steel (3) and beam reinforcing channel-section steel hoop (5) is connected with beams of concrete (1).
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| CN104895345B (en) * | 2015-06-07 | 2016-03-23 | 长安大学 | Based on building progressive collapse-resisting hardened system and the method for FRP cloth material |
| CN108894430B (en) * | 2017-01-03 | 2020-06-16 | 河北中郸建设有限公司 | Construction method for reinforcing steel structure beam or column |
| CN109723151A (en) * | 2019-02-27 | 2019-05-07 | 南京林业大学 | A kind of more high-rise wood/bamboo frame structure bean column nodes |
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| JP2009249982A (en) * | 2008-04-10 | 2009-10-29 | Daiwa Odakyu Construction Co Ltd | Reinforcing structure and reinforcing construction method of existing concrete skeleton |
| CN102409764A (en) * | 2011-08-15 | 2012-04-11 | 长安大学 | Reinforced concrete framework variable beam special-shaped node structure and reinforcing method |
| CN102979320A (en) * | 2012-12-29 | 2013-03-20 | 上海市建筑科学研究院(集团)有限公司 | Method for reinforcing severely vibrated and damaged reinforced concrete frame structure by coating steel jacket outside |
| CN102979319A (en) * | 2012-12-27 | 2013-03-20 | 中冶建筑研究总院有限公司 | Method for reinforcing frame node |
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2014
- 2014-11-24 CN CN201410680241.5A patent/CN104481164B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112031A (en) * | 1997-06-11 | 1999-01-06 | Takenaka Komuten Co Ltd | Earthquake resisting reinforcement method against bending of existing large beam |
| JP2007254953A (en) * | 2006-03-20 | 2007-10-04 | Tsuru Gakuen | Reinforcing structure of column/beam joint of steel structure |
| CN101004108A (en) * | 2007-01-18 | 2007-07-25 | 广州大学 | Method for reinforcing space nodes of beam column built from concrete |
| JP2009249982A (en) * | 2008-04-10 | 2009-10-29 | Daiwa Odakyu Construction Co Ltd | Reinforcing structure and reinforcing construction method of existing concrete skeleton |
| CN102409764A (en) * | 2011-08-15 | 2012-04-11 | 长安大学 | Reinforced concrete framework variable beam special-shaped node structure and reinforcing method |
| CN102979319A (en) * | 2012-12-27 | 2013-03-20 | 中冶建筑研究总院有限公司 | Method for reinforcing frame node |
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