CN101845850B - Strengthening concrete frame structure and construction method thereof - Google Patents

Strengthening concrete frame structure and construction method thereof Download PDF

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Publication number
CN101845850B
CN101845850B CN201010205823XA CN201010205823A CN101845850B CN 101845850 B CN101845850 B CN 101845850B CN 201010205823X A CN201010205823X A CN 201010205823XA CN 201010205823 A CN201010205823 A CN 201010205823A CN 101845850 B CN101845850 B CN 101845850B
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reinforcing bar
beam main
column
stem
concrete
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CN101845850A (en
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刘治国
翟雷
张桂敏
安凤杰
杨凯明
张辉
张静涛
刘自松
卢百华
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China Construction Second Engineering Bureau Co Ltd
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China Construction Second Engineering Bureau Co Ltd
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Abstract

The invention relates to a strengthening concrete frame structure. A frame column is formed by integrally pouring a stem steel rib and peripheral column reinforced concretes, wherein the concrete is poured inside the stem steel rib; studs which are vertical to the steel rib are arranged on the periphery of the stem steel rib; the stem steel rib is embedded in the column reinforced concrete structure; the reinforced steel bar in the column reinforced concrete structure comprises a stud, a column stirrup and a drag hook; the beam tendons at the upper part of a beam column joint are a main penetration tendon and a column winding tendon; when the upper column winding tendon passes by the stem steel rib in the frame column, the column winding tendon is bent outwards at a gradient of 1: 6; and when the upper main penetration tendon penetrates a reserved hole on the stem steel rib in the frame column, one end of a lower beam tendon is anchored in the column reinforced concrete structure or is bent upwards. The invention solves the problems that the reinforcing steel bar in the steel rib-concrete structure beam column joint areas is difficult to penetrate the stem steel rib, the concrete is inconvenient to pour and vibrate and the pouring effect is inferior. The structure of the invention can be widely applied to a long span high-rise frame structure.

Description

Strengthening concrete frame structure and job practices thereof
Technical field
The present invention relates to a kind of strengthening concrete frame structure and job practices thereof.
Background technology
The form of structure that current architecture configuration adopts usually is steel work or reinforced concrete structure, and steel work exists steel using amount big, and fire line is poor; Shortcomings such as maintenance cost height are for many high-rise long spans degree building, because relative reinforced concrete member cross section, steel structure member cross section is less than normal; The structural entity stable problem is outstanding, and the structure of reinforced concrete workload is big, especially to many high-level structures; The structural element cross section is bigger than normal, causes dead load big, and ground is had relatively high expectations; Steel-concrete structure also possesses the advantage of concrete structure except the advantage that steel work is arranged, structure has excellent fireproof performance simultaneously.Be that many high-rise long spans degree is built structural form selection preferably; But; Because the existence of reinforcing bar; The muscle problem of wearing of bean column node district reinforcing bar and the concrete blanking of steel concrete district and vibrate and become the obstacle of widespread adoption steel-concrete structure, the present invention aim to provide and solve bean column node district reinforcing bar and pass reinforcing bar, and the outside steel concrete technical scheme of building.
Summary of the invention
The purpose of this invention is to provide a kind of strengthening concrete frame structure and job practices thereof, solve the technical problem that the steel-concrete structure node area is passed the stem stem reinforcing bar; And the solution technical problem that steel-the concrete structure peripheral concrete is built.
For realizing above-mentioned purpose, the present invention adopts following technical scheme: a kind of strengthening concrete frame structure, form by frame column and Vierendeel girder; Vierendeel girder is a reinforced concrete beam, and said reinforcing bar comprises beam main tendon and beam stirrup, and beam main tendon comprises elongated muscle and non-elongated muscle; Vierendeel girder is connected the side or the top of frame column, is erected with floor on the Vierendeel girder, and floor and Vierendeel girder are cast as one; Said frame column is built with peripheral post reinforced concrete structure by the stem stem reinforcing bar and is one; Be cast with concrete in the stem stem reinforcing bar, the periphery of stem stem reinforcing bar is furnished with the peg perpendicular to the reinforcing bar face, and passes through the peg build-in in the post reinforced concrete structure; The reinforcing bar of said post reinforced concrete structure comprises stud, tie muscle and drag hook; The beam main tendon on top, bean column node place is divided into and runs through beam main tendon and around the post beam main tendon; Top when the post beam main tendon is walked around the stem stem reinforcing bar in the frame column, outwards bend around the gradient of post beam main tendon by 1: 6; The beam main tendon that runs through on top passes the preformed hole on the stem stem reinforcing bar in the frame column, and the end of the beam main tendon of bottom anchors in the post reinforced concrete structure or upwards bending.
Said frame column is insulated column or responde, and said stem stem reinforcing bar is square steel pipe or round steel pipe.
The concrete of said post reinforced concrete structure is a self-compaction without vibration concrete, and the concrete coarse aggregate maximum particle diameter is less than 1/3 of the steel reinforced concrete topping, and is not more than 25mm.
Said tie muscle is encrypted along the frame column overall height, and said drag hook is around stem stem reinforcing bar circumferential distribution, and drawknot is on stud.
The body of wall horizontal reinforcement of said responde is around breaking off to the side of responde, and with responde in the two-sided welding of reinforcing bar.
The beam main tendon on the top, bearing place of said Vierendeel girder is a row, two row or three rows.
The beam main tendon on the top, bearing place of said Vierendeel girder or the beam main tendon of bottom were 2 whens row, distributed in beam center line bilateral symmetry near the non-elongated muscle of beam center line.
Said frame column side is connected with stiffening plate or does not have, and its width is during greater than the breadth of section of Vierendeel girder, and the end haunch of Vierendeel girder is a haunched beam, and the beam main tendon in the haunched beam outside is walked around stud.
Construction sequence is following: step 1, the stone bolt that the preburied frame trestle is connected with patten.
Step 2, according to design drawing, unwrapping wire is confirmed the ground location of frame column.
Step 3 is according to the position of the definite frame column of unwrapping wire, in the stem stem reinforcing bar and the correction of floor mounted frame column.
Step 4 is according to the stud of working drawing and unwrapping wire fixed-site frame column.
Step 5; The bottom perfusion self-compaction without vibration concrete of stem stem reinforcing bar, after concrete strength reaches design strength, the concrete slag of cleaning bottom; Proofread and correct the stud position according to the post sideline, carry out then the joint of stud is carried out mechanical connection and stud is carried out colligation.
Step 6, tie muscle and drag hook on the cover stud, tie muscle opening part is arranged along four jiaos of logical commentaries on classics of frame column.
Step 7, the joint of inspection stud, qualified back is temporary fixed upright straight with scaffold, and will overlap good tie muscle colligation from top to bottom.
Step 8 installs the frame column template.
Step 9 is carried out the concreting of post reinforced concrete structure.
Step 10 is laid floor bottom mould.
Step 11 is worn bean column node place beam main tendon; Top when the post beam main tendon is walked around the stem stem reinforcing bar in the frame column, outwards bend around the gradient of post beam main tendon by 1: 6; The beam main tendon that runs through on top passes the preformed hole on the stem stem reinforcing bar in the frame column, and the end of the beam main tendon of bottom anchors in the post reinforced concrete structure or upwards bending.
Step 12 identifies stirrup spacing on beam main tendon, on beam main tendon, wear beam stirrup then, and beam main tendon and beam stirrup are carried out colligation.
Step 13 installs the side form of Vierendeel girder at the Vierendeel girder design attitude.
Step 14, the off line reinforcing bar of colligation floor and floor online reinforcing bar.
Step 15, pouring frame beam and floorslab concrete.
Compared with prior art the present invention has following characteristics and beneficial effect: at first, frame column of the present invention adopts the strengthening concrete structure except the advantage that steel work is arranged, and also possesses the advantage of concrete structure, and structure has excellent fireproof performance simultaneously.
Secondly, the beam main tendon of the present invention through top, bean column node place is divided into and runs through beam main tendon and around the post beam main tendon, top when the post beam main tendon is walked around the stem stem reinforcing bar in the frame column, outwards bend around the gradient of post beam main tendon by 1: 6; The beam main tendon that runs through on top passes the preformed hole on the stem stem reinforcing bar in the frame column; The end of the beam main tendon of bottom anchor in the post reinforced concrete structure or upwards bending wait measure to solve the muscle problem of wearing of how rationally to wear bean column node district reinforcing bar, to guarantee good stress performance of node and quickening speed of application.Solve stiffness post bean column node reinforcing bar binding problem effectively, accelerated construction speed, reduced the waste of reinforcing bar again.
Secondly; The concrete of frame column of the present invention adopts self-compaction without vibration concrete; Both solved the difficult problem of concrete blanking; Improved construction speed again, simultaneously without vibration technology has been guaranteed again that steel column does not touch because of external force and has been squinted, and Surface Quality of Concrete has reached the effect of clear-water concrete.
The present invention has overcome the shortcoming of traditional structure form fireproof performance difference, has solved the technical problem that the steel-concrete structure node area is passed reinforcing bar; And the solution technical problem that steel-the concrete structure peripheral concrete is built.
The present invention can be widely used in large span multi-rise building structure.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Fig. 1 is that reinforcing bar of the present invention is the insulated column structural representation of box.
Fig. 2 is the insulated column structural representation of reinforcing bar of the present invention for annular.
Fig. 3 is insulated column and the Vierendeel girder node area sketch map of reinforcing bar of the present invention for annular.
Fig. 4 is that reinforcing bar of the present invention is the insulated column and the Vierendeel girder node area sketch map of box.
Fig. 5 is a responde structural representation of the present invention.
Fig. 6 is that the present invention has stiffening plate frame column and Vierendeel girder node area sketch map.
Reference numeral: 1-stem stem reinforcing bar, 2-peg, 3-post reinforced concrete structure, 4-stud, 5-tie muscle, 6-drag hook, 7-beam main tendon, 7.1-run through beam main tendon, 7.2-adds girt strip, 9-Vierendeel girder, 10-stiffening plate, 11-insulated column, 12-responde, 13-body of wall horizontal bar around post beam main tendon, 8-.
The specific embodiment
Embodiment is referring to Fig. 1～shown in Figure 6, and certain engineering B1 layer is a structural transition layer, adopts strengthening concrete frame structure; Be made up of frame column and Vierendeel girder 9, Vierendeel girder 9 is a reinforced concrete beam, and said reinforcing bar comprises beam main tendon 7 and beam stirrup; Beam main tendon 7 comprises elongated muscle and non-elongated muscle; Vierendeel girder 9 is connected the side or the top of frame column, is erected with floor on the Vierendeel girder 9, and floor and Vierendeel girder 9 are cast as one; Said frame column is built with peripheral post reinforced concrete structure by the stem stem reinforcing bar and is one; Be cast with concrete in the stem stem reinforcing bar 1, the periphery of stem stem reinforcing bar 1 is furnished with the peg 2 perpendicular to the reinforcing bar face, and passes through peg 2 build-ins in post reinforced concrete structure 3; The reinforcing bar of said post reinforced concrete structure 3 comprises stud 4, tie muscle 5 and drag hook 6; The beam main tendon 7 on top, bean column node place is divided into and runs through beam main tendon 7.1 and around post beam main tendon 7.2; Top when post beam main tendon 7.2 is walked around the stem stem reinforcing bar 1 in the frame column, outwards bend around the gradient of post beam main tendon 7.2 by 1: 6; The beam main tendon 7.1 that runs through on top passes the preformed hole on the stem stem reinforcing bar 1 in the frame column, and the end of the beam main tendon 7 of bottom anchors in the post reinforced concrete structure 3 or upwards bending.Said frame column is insulated column 11 or responde 12, and said stem stem reinforcing bar 1 is square steel pipe or round steel pipe.The concrete of said post reinforced concrete structure 3 is a self-compaction without vibration concrete, and the concrete coarse aggregate maximum particle diameter is less than 1/3 of the steel reinforced concrete topping, and is not more than 25mm.Said tie muscle 5 is encrypted along the frame column overall height, and said drag hook 6 is around stem stem reinforcing bar 1 circumferential distribution, and drawknot is on stud 4.The body of wall horizontal reinforcement 13 of said responde 12 is around breaking off to the side of responde 12, and with responde in reinforcing bar 1 two-sided welding.The beam main tendon 7 on the top, bearing place of said Vierendeel girder 9 is a row, two row or three rows.When the beam main tendon 7 on said top was a row, non-elongated muscle was Ln/4 from frame column, Vierendeel girder 9 or the outer peripheral development length of body of wall; When the beam main tendon 7 on top is two rows; Going up most the non-elongated muscle of a row is the higher value among Ln/3 and the Ln/4+La from frame column, Vierendeel girder 9 or the outer peripheral development length of body of wall, and the non-elongated muscle of second row is Ln/4 from frame column, Vierendeel girder 9 or the outer peripheral development length of body of wall; When the beam main tendon 7 on top is three rows; The non-elongated muscle of the 3rd row is Ln/4 from frame column, Vierendeel girder 9 or the outer peripheral development length of body of wall; The non-elongated muscle of second row is a higher value among Ln/3 and the Ln/4+La from frame column, Vierendeel girder 9 or the outer peripheral development length of body of wall; Going up most the non-elongated muscle of a row is higher value among Ln/3+La and the Ln/4+2La from frame column, Vierendeel girder 9 or the outer peripheral development length of body of wall, and specifically following the example of by the reinforced concrete construction standard of Ln and La got.The beam main tendon 7 on the top, bearing place of said Vierendeel girder 9 or the beam main tendon 7 of bottom were 2 whens row, distributed in beam center line bilateral symmetry near the non-elongated muscle of beam center line.Said frame column side is connected with stiffening plate 10 or does not have, and its width is during greater than the breadth of section of Vierendeel girder 9, and the end haunch of Vierendeel girder 9 is a haunched beam 8, and the beam main tendon 7 in haunched beam 8 outsides is walked around stud 4.
The sectional dimension of frame column is 1100 * 1100,900 * 900mm etc.; The strength grade of stem stem reinforcing bar-composite steel concrete column is C40; Adopt self-compaction without vibration pea gravel concreten, the concrete coarse aggregate maximum particle diameter should be less than 1/3 of steel reinforced concrete topping, and should not be greater than 25mm.It is 25,28,32 and the reinforcing bar of  12,16 that stud adopts diameter, and stirrup and drag hook adopt 14100 (encryptions of conversion layer tie muscle overall height).
Vierendeel girder adopts the C30 concrete, and beam section is of a size of 1000 * 950,500 * 950,400 * 600,400 * 700 etc., and it is 18,20,22,25,28,32 or 12,14,16 or 8,10 that reinforcing bar adopts diameter.
Beam main tendon passes or walks around the stem stem reinforcing bar of frame column in the Vierendeel girder.
To the heavy in section Vierendeel girder, like 1000 * 950mm, no more than 10 of the every row of upper and lower beam main tendon, reinforcing bar is walked around in 4 in the outside, and middle 6 are passed reinforcing bar.
400 * 950mm Vierendeel girder, no more than 5 of the every row of upper and lower beam main tendon, 2 haunches in the outside are walked around the stem stem reinforcing bar, and 3 are passed the stem stem reinforcing bar.
The body of wall horizontal reinforcement 13 of responde 12 is around breaking off to the side of responde 12, and with responde in reinforcing bar 1 two-sided welding 5d, d is the diameter of body of wall horizontal reinforcement 13.
Concrete construction sequence of the present invention is following: step 1, the stone bolt that the preburied frame trestle is connected with patten.
Step 2, according to design drawing, unwrapping wire is confirmed the ground location of frame column.
Step 3 is according to the position of the definite frame column of unwrapping wire, in the reinforcing bar 1 and the correction of floor mounted frame column.
Step 4 is according to the stud 4 of working drawing and unwrapping wire fixed-site frame column.
Step 5; The bottom perfusion self-compaction without vibration concrete of stem stem reinforcing bar 1, after concrete strength reaches design strength, the concrete slag of cleaning bottom; Proofread and correct stud 4 positions according to the post sideline, carry out then the joint of stud 4 is carried out mechanical connection and stud 4 is carried out colligation; Stud 4, the joint in the same plane stagger by 50% and are not less than 35d (d is the diameter of stud 4).
Step 6, tie muscle 5 and drag hook 6 on the cover stud, tie muscle 5 opening parts are arranged along four jiaos of logical commentaries on classics of frame column.
Step 7; The joint of inspection stud 4 is adjusted qualified back post spacing frame (fixedly reinforcing bar position can be had enough to meet the need use) is set on the top of frame column; And the spacing stirrup of 1～2 road post is set on the top of frame column, and spacing frame and spacing stirrup and stud colligation are firm.The topping cushion block after finishing, is set in the stud colligation, stud topping 30mm.Plastic washer is stuck on the tie muscle, spacing 600mm be used for the check box trestle whether have askew, turn round a phenomenon, temporary fixed upright straight after the passed examination, and will overlap good tie muscle 5 colligation from top to bottom with scaffold; During colligation tie muscle 5, on the stud 4 of frame column with chalk from concrete face 50mm, drawn tie muscle 5 spacings on request, will overlap good tie muscle 5 colligation from top to bottom then.The stud 4 of frame column is during with 5 colligations of tie muscle, and the corner adopts pocket to buckle colligation, middlely adopts the colligation of Eight characters button, and tie up button unnecessary tie up silk must be towards component inside.When beam main tendon 7 conflicted with the stud 4 of frame column, beam main tendon passed through from the inside of the stud 4 of frame column, and beam main tendon is by the stud 4 of frame column.
Step 8 installs the frame column template.
Step 9 is carried out the concreting of post reinforced concrete structure 3; Build in the process and note: tank car revolves at a high speed about jar 90s before the discharging; In the cast scope, can reduce to the greatest extent when building and build layering (lift height is taken as 1m), make concrete action of gravity be able to give full play to, and do not destroy concrete whole cohesiveness as far as possible.During concreting, use the hammer tapping template, play auxiliary flow and auxiliary closely knit effect.Self-compacting concrete is built to design height and can be stopped to build, and reexamines the concrete absolute altitude behind the 20min, builds again as absolute altitude is lower slightly, to guarantee to reach designing requirement again.Build finish after, cylinder adopts double-layer plastic cloth parcel, scatters and disappears to prevent that water from dividing, the maintenance of sprinkling water immediately after the final set uninterruptedly keeps moisture state.Be not subjected to displacement in order to ensure steel column, adopt tower crane to carry out concrete lifting, the even blanking of opposite side during concreting because of building.With the adz-eye hammer tapping template outside, improve concrete compactness.Be less than 14 days under the curing time, concrete surface and internal difference in temperature are less than 25 ℃.
Step 10 is laid floor bottom mould.
Step 11 is worn bean column node place beam main tendon 7; Top when post beam main tendon 7.2 is walked around the stem stem reinforcing bar 1 in the frame column, outwards bend around the gradient of post beam main tendon 7.2 by 1: 6; The beam main tendon 7.1 that runs through on top passes the preformed hole on the stem stem reinforcing bar 1 in the frame column, and the end of the beam main tendon 7 of bottom anchors in the post reinforced concrete structure 3 or upwards bending.
Step 12 identifies stirrup spacing on beam main tendon, on beam main tendon 7, wear beam stirrup then, and beam main tendon 7 and beam stirrup are carried out colligation; The beam main tendon joint location: the beam main tendon on top is at span centre, and the beam main tendon on top is at the bearing place.This engineering B1 layer framework antidetonation grade is a secondary.Diameter >=16mm reinforcing bar adopts straight thread to connect I level joint.Beam main tendon anchorage length Lae: diameter is that 28mm and 32mm get 45d, and diameter is 18,20,22 and 25 to get 41d, and diameter is 16 to get 35d.
Step 13 installs the side form of Vierendeel girder 9 at the Vierendeel girder design attitude.
Step 14, the off line reinforcing bar of colligation floor and floor online reinforcing bar.
Step 15, pouring frame beam 9 and floorslab concrete.
In addition, the steel bar stress in the engineering adopts HPB235 level, HRB335 and HRB400 level steel, because the HRB335 level is identical with the outward appearance of HRB400 level steel, the mark of difference is not obvious.Therefore in construction, take strict effectively control measures, HRB335 and the former material of HRB400 level steel and the stacking of semiproduct subregion are in order to avoid the phenomenon that generation HRB335 level and HRB400 level are used with in construction is guaranteed construction quality.

Claims (7)

1. the job practices of a strengthening concrete frame structure, said strengthening concrete frame structure is made up of frame column and Vierendeel girder (9); Vierendeel girder (9) is a reinforced concrete beam; Said reinforcing bar comprises beam main tendon (7) and beam stirrup, and beam main tendon (7) comprises elongated muscle and non-elongated muscle, and Vierendeel girder (9) is connected the side or the top of frame column; Vierendeel girder is erected with floor on (9); Floor and Vierendeel girder (9) are cast as one, and said frame column is built with peripheral post reinforced concrete structure by the stem stem reinforcing bar and is one, and the stem stem reinforcing bar is cast with concrete in (1); The periphery of stem stem reinforcing bar (1) is furnished with the peg (2) perpendicular to the reinforcing bar face, and passes through peg (2) build-in in post reinforced concrete structure (3); The reinforcing bar of said post reinforced concrete structure (3) comprises stud (4), tie muscle (5) and drag hook (6); The beam main tendon (7) on top, bean column node place is divided into and runs through beam main tendon (7.1) and around post beam main tendon (7.2); Top when post beam main tendon (7.2) is walked around the stem stem reinforcing bar (1) in the frame column, outwards bend around the gradient of post beam main tendon (7.2) by 1: 6; The beam main tendon (7.1) that runs through on top passes the preformed hole on the stem stem reinforcing bar (1) in the frame column, and the end of the beam main tendon of bottom (7) anchors in the post reinforced concrete structure (3) or upwards bending; Said frame column is insulated column (11) or responde (12), and said stem stem reinforcing bar (1) is square steel pipe or round steel pipe; It is characterized in that: construction sequence is following:
Step 1, the stone bolt that the preburied frame trestle is connected with patten;
Step 2, according to design drawing, unwrapping wire is confirmed the ground location of frame column;
Step 3 is according to the position of the definite frame column of unwrapping wire, in the stem stem reinforcing bar (1) and the correction of floor mounted frame column;
Step 4 is according to the stud (4) of working drawing and unwrapping wire fixed-site frame column;
Step 5; The bottom perfusion self-compaction without vibration concrete of stem stem reinforcing bar (1); After concrete strength reaches design strength; The concrete slag of cleaning bottom is proofreaied and correct stud (4) position according to the post sideline, carries out then the joint of stud (4) is carried out mechanical connection and stud (4) is carried out colligation;
Step 6, tie muscle (5) and drag hook (6) on the cover stud, tie muscle (5) opening part is arranged along four jiaos of logical commentaries on classics of frame column;
Step 7, the joint of inspection stud (4), qualified back is temporary fixed upright straight with scaffold, and will overlap good tie muscle (5) colligation from top to bottom;
Step 8 installs the frame column template;
Step 9 is carried out the concreting of post reinforced concrete structure (3);
Step 10 is laid floor bottom mould;
Step 11 is worn bean column node place beam main tendon (7); Top when post beam main tendon (7.2) is walked around the stem stem reinforcing bar (1) in the frame column, outwards bend around the gradient of post beam main tendon (7.2) by 1: 6; The beam main tendon (7.1) that runs through on top passes the preformed hole on the stem stem reinforcing bar (1) in the frame column, and the end of the beam main tendon of bottom (7) anchors in the post reinforced concrete structure (3) or upwards bending;
Step 12 identifies stirrup spacing on beam main tendon, on beam main tendon (7), wear beam stirrup then, and beam main tendon (7) and beam stirrup are carried out colligation;
Step 13 installs the side form of Vierendeel girder (9) at the Vierendeel girder design attitude;
Step 14, off line reinforcing bar of colligation floor and floor online reinforcing bar;
Step 15, pouring frame beam (9) and floorslab concrete.
2. the job practices of strengthening concrete frame structure according to claim 1; It is characterized in that: the concrete of said post reinforced concrete structure (3) is a self-compaction without vibration concrete; The concrete coarse aggregate maximum particle diameter is less than 1/3 of the steel reinforced concrete topping, and is not more than 25mm.
3. the job practices of strengthening concrete frame structure according to claim 1 is characterized in that: said tie muscle (5) is encrypted along the frame column overall height, and said drag hook (6) is around stem stem reinforcing bar (1) circumferential distribution, and drawknot is on stud (4).
4. the job practices of strengthening concrete frame structure according to claim 1; It is characterized in that: the body of wall horizontal reinforcement (13) of said responde (12) is around breaking off to the side of responde (12), and with responde in the two-sided welding of stem stem reinforcing bar (1).
5. the job practices of strengthening concrete frame structure according to claim 1 is characterized in that: the beam main tendon (7) on the top, bearing place of said Vierendeel girder (9) is a row, two row or three rows.
6. the job practices of strengthening concrete frame structure according to claim 1; It is characterized in that: the beam main tendon (7) on the top, bearing place of said Vierendeel girder (9) or the beam main tendon (7) of bottom were 2 whens row, distributed in beam center line bilateral symmetry near the non-elongated muscle of beam center line.
7. the job practices of strengthening concrete frame structure according to claim 1; It is characterized in that: said frame column side is connected with stiffening plate (10) or does not have stiffening plate; The frame column width is during greater than the breadth of section of Vierendeel girder (9); The end haunch of Vierendeel girder (9) is haunched beam (8), and the beam main tendon (7) in haunched beam (8) outside is walked around stud (4).
CN201010205823XA 2010-06-22 2010-06-22 Strengthening concrete frame structure and construction method thereof Expired - Fee Related CN101845850B (en)

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