CN100400778C - Method of reinforcing opening of steel frame girder - Google Patents
Method of reinforcing opening of steel frame girder Download PDFInfo
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- CN100400778C CN100400778C CNB2005100554431A CN200510055443A CN100400778C CN 100400778 C CN100400778 C CN 100400778C CN B2005100554431 A CNB2005100554431 A CN B2005100554431A CN 200510055443 A CN200510055443 A CN 200510055443A CN 100400778 C CN100400778 C CN 100400778C
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0244—Increasing or restoring the load-bearing capacity of building construction elements of beams at places of holes, e.g. drilled in them
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0452—H- or I-shaped
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- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
This invention provides a method of reinforcing an opening of a steel frame girder by which a degree of freedom in the design and construction is improved, and a better reinforcing effect is obtained while being safe and simple in terms of structural resistance. A center tube 3 is inserted into an opening 1B of a girder web 1A while keeping the steel frame girder 1 erected. Threaded grooves 2A formed in an edge part of the opening are threadably fitted to threaded grooves 3A of the center tube 3, and a pair of reinforcing steel plates 2, 2 are attached to the center tube 3 in a manner of sandwiching the girder web 1A. Then, an auxiliary force applicator like a jig is inserted into and axial force introduction holes 5, 5 of the reinforcing steel plates 2, 2. In a state where one reinforcing steel plate 2 is fixed, a larger force is introduced by applying a load in a rotational axial force direction to rotate the other reinforcing steel plate 2 so that the girder web 1A and the pair of reinforcing plates 2, 2 may be friction-welded to each other. The auxiliary force applicator is pulled out of the axial force introduction hole 5, the hole 5 is plug welded, and the reinforcing plates 2, 2 and the girder web 1A are fixed further.
Description
Technical field
The opening that the invention relates to a kind of steel-frame beam is strengthened job practices.
Background technology
Generally speaking, on the web of steel-frame beam, be provided with through hole more and be used for various pipe arrangements and distribution, and on the peristome of this web, be used to remedy the damaged stiffening device of its section.As the opening stiffening device of this web, the stiffener (for example with reference to patent documentation 1) of annular etc. is arranged.Promptly, in patent documentation 1, disclosed a kind of like this technology, to give prominence to the externally threaded tube 52a of portion that is with that is provided with in the centre bore portion of annular stiffener 52 shown in Figure 13, insert in the web opening 51 of steel-frame beam 50, and make the outstanding tapped tube 53a of portion that is provided with in the centre bore portion of another annular stiffener 53, insert the web opening 51 from opposite side, and be with the externally threaded tube 52a of portion to screw togather with aforementioned, make two stiffeners 52,53 tighten clamping, the performance booster action on the two sides of the web peristome 51 of steel-frame beam 50.
The spy of [patent documentation 1] Japanese Patent Laid Open Publication opens flat 7-238635 communique
But the stiffener 52,53 that patent documentation 1 is recorded and narrated is complex-shaped.And, install in the time of stiffener 52,53 and packing ring 54 and be difficult to be undertaken by operator 1 people, do not operate more than 2 people then can't install if be not in the paper side of beam and inboard.In addition, thickness according to web, determine the tapped tube 53a of portion of length and be with the externally threaded tube 52a of portion, packing ring 54 on the reinforcement scope, to have limit, as strengthening whole webs, must prepare the tapped tube 53a of portion of having of several length and with the stiffener 52,53 of the externally threaded tube 52a of portion.
Summary of the invention
Therefore, the degree of freedom that the purpose of this invention is to provide a kind of design and construction improves, safety and simple on the structure endurance, and the opening that can obtain the steel-frame beam of bigger stiffening effect is strengthened job practices.
Therefore, strengthen the invention of job practices about the opening of steel-frame beam, it is characterized in that: in the opening of on the web of steel-frame beam, being offered, insert the mesotube that its outside is formed with the screw ditch, and make from the outside respectively with the form of clamping aforementioned beam web that the screw ditch of formed screw ditch and aforementioned mesotube screws togather in the edge of opening portion of a pair of intensive aspect, and with the aforementioned beam web with aforementioned a pair of intensive aspect is frictionally engaged and fixing.
Strengthen the invention of job practices about the opening of steel-frame beam, it is characterized in that: in the opening of on the web of steel-frame beam, being offered, insert the mesotube that its outside is formed with the screw ditch, and make from the outside respectively with the form of clamping aforementioned beam web that the screw ditch of formed screw ditch and aforementioned mesotube screws togather in the edge of opening portion of a pair of intensive aspect, by to inserting afterburning auxiliary appliance in the axle power entrance hole of being offered on the aforementioned a pair of intensive aspect to apply the power that is rotated to aforementioned a pair of intensive aspect, it is deposited fixing that aforementioned beam web and aforementioned a pair of intensive aspect are carried out.
The present invention can provide the degree of freedom of a kind of design and construction to improve, safety and simple on the structure endurance, and the opening that can obtain the steel-frame beam of bigger stiffening effect is strengthened job practices.And, inserting in the opening of being offered on the web of steel-frame beam in the mesotube of the state that an intensive aspect will be installed, and install from opposite side under the situation of another intensive aspect with the form of this web of clamping, operator 1 people can carry out installation exercise.The web different to thickness in addition, in setting range, form the screw ditch, even also there is no need to be provided with multiple stiffener and can carry out correspondence by outside in mesotube.
Description of drawings
Fig. 1 is the vertical disconnected front view of state that steel-frame beam is strengthened.
Fig. 2 is the side view of state that steel-frame beam is strengthened.
Fig. 3 is the vertical disconnected front view of the state of mounting sleeve on the steel-frame beam of the state that has carried out strengthening.
Figure 4 shows that the reinforcement steel plate.
Figure 5 shows that the skiagraph of mesotube.
Fig. 6 is the skiagraph of sleeve pipe.
Fig. 7 is the side view of the state that steel-frame beam is strengthened of another example of expression.
Fig. 8 is the X-X profile of Fig. 7.
Fig. 9 is the side view of reinforcement steel plate etc. that is used to illustrate the operating principle of another example.
Figure 10 is the afterburning synoptic diagram that has carried out breakdown test.
Figure 11 is the realistic M-R bone lattice curve map of testing the result.
The side view of the state that Figure 12 steel-frame beam has been carried out for another example of expression strengthened.
Figure 13 is side view (A) and the profile (B) of A-A part and the expansion profile of B part of the known example of expression.
1: steel-frame beam 1A: web
1B: opening 2: strengthen steel plate
2A: screw ditch 3: mesotube
3A: screw ditch 4: sleeve pipe
5: axle power entrance hole 8: friction engageable surface
11: steel-frame beam 11A: web
11B: opening 12: strengthen steel plate
12A: screw ditch 13: mesotube
13A: screw ditch 15: axle power entrance hole
20: plug welding 31: steel-frame beam
31A: web 31B: opening
32: strengthen steel plate 33: mesotube
35: welding 50: steel-frame beam
51: web opening 52: stiffener
52a: be with externally threaded tube portion 53: stiffener
53a: tapped tube portion
The specific embodiment
Below, the 1st example of the present invention is described according to Fig. 1 to Fig. 6.At first, be that the mother metal that is reinforced of H shape is the pars intermedia of the web 1A of steel-frame beam 1 in section configuration, offer circular opening 1B.Then, under the state that the reinforcement operation is kept upright in that steel-frame beam 1 is laid across, whole outside (from the beginning to the end) is formed with the mesotube 3 (with reference to Fig. 5) of the hollow cylinder shape of screw ditch 3A, inserts in the opening 1B of web 1A.
Then, central portion is formed one of circular opening to strengthening steel plate 2,2 (with reference to Fig. 4), the screw ditch 3A of formed screw ditch 2A and aforementioned mesotube 3 screws togather in its edge of opening portion to make from the outside respectively, installs with the form of clamping aforementioned beam web 1A.
Then, insert afterburning auxiliary appliances such as anchor clamps totally in a plurality of (1 2 of for example per 180 degree) axle power entrance hole 5,5 of on aforementioned reinforcement steel plate 2,2, being offered, under the state that a reinforcement steel plate 2 is fixed, another is strengthened steel plate 2 along the in addition load of axis of rotation force direction, and one side makes the in addition bigger power of its rotation one side.In this case, apply energetically, until because of aforementioned beam web 1A and 2,2 frictional force that produced of aforementioned a pair of reinforcement steel plate stress being communicated and being frictionally engaged.Being frictionally engaged in this case, making aforementioned a pair of reinforcement steel plate 2,2 is not enough with the state of degree banding on aforementioned beam slab 1A of hand strength tension, and be aforementioned like that, utilize the state of lock ring more such as anchor clamps.
Then, finish to apply above-mentioned the sort of energetically after, afterburning auxiliary appliances such as aforementioned anchor clamps are extracted from aforementioned axis power entrance hole 5, and aforementioned axis power entrance hole 5 filled with plug welding, make aforementioned reinforcement steel plate 2,2 and web 4 utilize this plug welding fixing firmly, also can prevent to strengthen becoming flexible, slide or peeling off of steel plate 2,2.
In addition, aforementioned reinforcement steel plate 2,2 as in advance in order to produce stronger friction, and to the side of one of fitting of the web 1A with steel-frame beam 1 utilizes sandblast or produces red rust etc. and carries out processing in early stage, and then its effect is bigger.
Below, the situation of the steel frame reinforced concrete being made with local methods the beam of (SRC) with reference to Fig. 3 describes.In Fig. 1 and Fig. 2, by utilizing the screw ditch 3A that on the outside that the mesotube 3 of strengthening steel plate use in 2,2 o'clock is installed, is processed to form, make that the screw ditch 3A of formed screw ditch 4A and aforementioned mesotube 3 screws togather on each terminal inner face of sleeve pipe 4,4 of hollow cylinder shape as shown in Figure 6, thereby at two terminal mounting sleeves 4,4 respectively of aforementioned mesotube 3.
Aforementioned sleeve pipe 4,4 is owing to be the processing of carrying out screw ditch 4A in the inboard, so guarantee the length set after installing easily.And, also needn't one fix on and make factory and install, for the consideration on transporting, also can install in the building site.
In addition, under the situation about being frictionally engaged of the 1st example, in order to improve stiffening effect, also need not carry out plug welding, aforementioned reinforcement steel plate 2,2 and web 1A can fix firmly.
Below, to the 2nd (another) of the present invention example, describe according to Fig. 7 to Fig. 9.At first, be that the mother metal that is reinforced of H shape is the pars intermedia of the web 11A of steel-frame beam 11 in section configuration, offer circular opening 11B.Then, strengthen under the state that operation is kept upright in that steel-frame beam 11 is laid across, whole outside (from the beginning to the end) is formed with the mesotube 13 of the hollow cylinder shape of screw ditch 13A, insert in the opening 11B of web 11A.Then, central portion is formed one of circular opening to strengthening steel plate 12,12,, install with the form of clamping aforementioned beam web 11A so that the screw ditch 13A of formed screw ditch 12A and aforementioned mesotube 13 screws togather in its edge of opening portion.
Then, insert afterburning auxiliary appliances such as anchor clamps totally in a plurality of (1 4 of for example per 90 degree) axle power entrance hole 15,15 of on aforementioned reinforcement steel plate 12,12, being offered, under the state that a reinforcement steel plate 12 is fixed, another is strengthened steel plate 12 along the in addition load of axis of rotation force direction, and operator's one side makes its rotation one side afterburning with the degree of manual tension.
In this case, also can not utilize anchor clamps etc., the manual tension that can directly carry out by the hand that utilizes the operator is fixed 1 pair of reinforcement steel plate 12,12 with the form of this web of clamping 11A on aforementioned beam web 11A.Under any situation, a pair of reinforcement steel plate 12,12 and web 11A are fixed with gapless state.
And, even utilize anchor clamps and tighten machinery, aforementioned beam web 11A and aforementioned a pair of reinforcement steel plate 12,12 be frictionally engaged before, also stop to import the power that makes its rotation.Then, after stopping to import the power of this rotation,, make aforementioned axis power entrance hole 15 form plug welding 20,21, and utilize this welding that aforementioned reinforcement steel plate 12,12 and web 11A are fixed firmly in order to improve stiffening effect.
Fig. 9 is the side view that is used to illustrate the operating principle of this example, be to describe about the effect under the situation that applies external force on the steel-frame beam 11A, but at first in the A portion at the screw junction surface of the screw ditch 13A of the screw ditch 12A of aforementioned reinforcement steel plate 12,12 and mesotube 13, strengthen steel plate 12,12 and sandwich, web 11A is fixed with mesotube 13 in paper side and the inboard of web 11A.
Then, along with the increase of external force, the outer deflection of the face of web 11A increases, but owing to a pair of reinforcement steel plate 12,12 is fixed on the web 11A, so can suppress the distortion of web 11A.
In addition, owing to utilize plug welding 20 (a reinforcement steel plate 12 sides) and plug welding 21 (another strengthens steel plate 12 sides) that web 11A is also being welded with strengthening steel plate 12,12 tops, so in B portion and C portion, strengthen steel plate 12,12 and web 11A by integrated, thereby suppress the distortion of web 11A, make stiffening effect big.
In addition, A portion at the screw junction surface of the screw ditch 13A of screw ditch 12A that strengthens steel plate 12,12 and mesotube 13, except strengthening steel plate 12,12, the mesotube that is in aforementioned opening 11B center also suppresses the three-dimensional twisted distortion of web 11A, the institute so that plastic deformation ability rapidly improve.
When utilizing the sort of afterburning experimental facilities of Figure 10 to carry out breakdown test, can ask the M-R bone lattice curve map of Figure 11.In addition, the F of this Figure 11 and G are for implementing the steel-frame beam that adds strong method of this example, and the D that implements in order to compare with this example is not for having the steel-frame beam of opening, and E is the steel-frame beam with nothing reinforcement of opening.
In this case, afterburning apply level repeatedly in back portion and increase the weight of, imperforation beam D and have opening not have stiffening girder E to proceed to+side pole limit endurance, and also the reinforcement steel plate G of the reinforcement steel plate F of 9mm and 12mm proceeds to member angle 1/10.
Utilization is according to the job practices that adds strong method of this example, and recovering appears in endurance.The effect that particularly can confirm maximum endurance is big, and the endurance decline that presents after the maximum endurance is slow, and the result makes the rapid raising of limit endurance.
In detail, present as this breakdown test result as can be known, originally add under the situation of strong method having implemented, D compares with the imperforation beam, and steel-frame beam F of this example and the deformability of G rapidly improve.According to existing benchmark, preferably adopt the shatter-proof design of carrying out in advance according to the toughness of building, and when violent earthquake, form the such structure design of integral yield structure of beam elder generation line bend surrender type.Therefore, the expectation of requirement beam end can form hinged portion and have enough toughness, and originally add strong method as can be known by the breakdown test result, has the plastic deformation ability that surpasses imperforation beam (user mode of common beam) D, compare with the deformability that opening does not have a stiffening girder E in addition, also carried out significantly improving.
Based on above reason, by in design method, also with originally adding the hinged formation of the plasticity portion that strong method is applied to the beam end earthquake-proof function of building being improved energetically, so in the size that can dwindle steel-frame beam, maybe can enlarge intercolumniation every etc. the degree of freedom of aspect improve, also can expect a kind of based on the steel construction design method of the known diverse design of design.
In addition, in the 2nd (another) of the present invention example, also can with the 1st example similarly, screw togather by the screw ditch 13A that makes formed screw ditch of its terminal inner face and aforementioned mesotube 13, make the sleeve pipe (not shown) that steel frame steel concrete is used and install.Like this, because the 1st and the 2nd example all can utilize the screw ditch of the unnecessary length part of mesotube that aforementioned sleeve pipe is installed, even so can the length (beginning) till tube ends when installing not adjust from web according to the building method precision yet, can eliminate more concrete framed exceeding or problem such as shortening, and owing to needn't one fix on and make factory and sleeve pipe is installed on the steel-frame beam carries, so can improve charging ratio to carrier.
As top, be by not reaching such being frictionally engaged and the degree that is frictionally engaged of the 2nd example fixing of the 1st example, the web and the reinforcement steel plate of steel-frame beam are fixed, to strengthen the axle power entrance hole of steel plate again fills with plug welding, aforementioned reinforcement steel plate and web are fixed, but also can replace this plug welding, and strengthen offering inserting hole on steel plate and the web two, and utilize and in this inserting hole, insert logical bolt and nut, two reinforcement steel plates and web are fixed, can be selected fixing means according to operating environment.
In this case, (be not limited thereto at an aforementioned beam web and an axle power entrance hole of strengthening steel plate, also can be again the inserting hole that forms) pairing another strengthen offering inserting hole on the position of steel plate, and make aforementioned bolt insert the axle power entrance hole of a logical reinforcement steel plate and the inserting hole of aforementioned beam web and another reinforcement steel plate, and utilize nut screwing clamping to fix, but should be fixing on 2 place's symmetric positions at center of steel plate are respectively strengthened in clamping, carry out at least.Therefore, aforementioned reinforcement steel plate and web fixing do not carry out plug welding, even or to have carried out also be minute quantity, so seldom web is applied heat affecting, can not produce or be difficult to produce the distortion of the steel-frame beam that causes because of sweating heat and crooked.
In addition, have more than the axle power entrance hole that is limited to a pair of reinforcement steel plate and utilize plug welding to fill, and aforementioned reinforcement steel plate and web are fixed, also fillet welding can be carried out in a pair of reinforcement steel plate outer edge and web.
And, make the screw ditch in setting range by outside in mesotube, for example in roomy as far as possible scope, even on zone, whole outside, form, even thereby the web different to thickness, also can strengthen, there is no need to be provided with the kind of a plurality of reinforcement steel plates, only can carry out correspondence by a kind.
In addition, both can be under the state in the opening that aforementioned mesotube is inserted into web, form with the clamping beam web is installed aforementioned reinforcement steel plate from both sides, also can insert in the aforementioned opening aforementioned one mesotube of strengthening the state of steel plate has been installed, and from opposite side another is installed with the form of clamping beam web and strengthens steel plate, and web and a pair of intensive aspect are fixed.In the latter case, the operator only can carry out installation exercise by 1 people.
Below, the 3rd example of the present invention is described according to Figure 12.At first, be that the mother metal that is reinforced of H shape is the pars intermedia of the web 31A of steel-frame beam 31 in section configuration, offer circular opening 31B.Then, under the state that the reinforcement operation is kept upright in that steel-frame beam 31 is laid across, the mesotube 33 of hollow cylinder shape is inserted in the opening 31B of web 31A.Then, central portion is formed one of circular opening to strengthening steel plate 32,32, be provided with the form from outside clamping aforementioned beam web 31A respectively.
In this case, so that the mesotube 33 inserted is fitted to form in the opening of a pair of reinforcement steel plate 32,32 in the opening 31B of web 31A, makes and strengthen steel plate 32,32 clamping beam web 31A and be provided with.
Then, carry out partly (several positions) welding 35 by edge of opening portion, and make aforementioned mesotube 33 and reinforcement steel plate 32,32 partly weld fixing mesotube 33 outer edges and reinforcement steel plate 32,32.By this, aforementioned beam web 31A and aforementioned a pair of reinforcement steel plate 32,32 can be fixed firmly.Therefore, even utilize the 3rd example, also can obtain aforesaid various effect.In addition, also can replace this welding 35, and fix with other materials such as adhesives.
In addition, the aforementioned reinforcement steel plate in all examples, though also can be cast iron, the system of forging, because in manufacture process, there is problem such as cost height, so also can make by rolled plate.And the shape of this reinforcement steel plate is not limited to circle, also can be other shapes such as polygonal, there is no need to be sheet material in addition.
Claims (1)
1. the opening of a steel-frame beam is strengthened job practices, it is characterized in that: in the opening of on the web of steel-frame beam, being offered, insert the mesotube that its outside is formed with the screw ditch, and make from the outside respectively with the form of clamping aforementioned beam web that the screw ditch of formed screw ditch and aforementioned mesotube screws togather in the edge of opening portion of a pair of intensive aspect, by to inserting afterburning auxiliary appliance in the axle power entrance hole of being offered on the aforementioned a pair of intensive aspect to apply the power that is rotated to aforementioned a pair of intensive aspect, after making aforementioned beam web and aforementioned a pair of intensive aspect fixing, the welding of aforementioned axis power entrance hole is filled, and it is deposited fixing that aforementioned a pair of intensive aspect and web are carried out.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004081938 | 2004-03-22 | ||
| JP200481938 | 2004-03-22 | ||
| JP2004349518 | 2004-12-02 | ||
| JP2004349518 | 2004-12-02 | ||
| JP2005052903 | 2005-02-28 | ||
| JP2005052903A JP3996931B2 (en) | 2004-03-22 | 2005-02-28 | Steel beam opening reinforcement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1673473A CN1673473A (en) | 2005-09-28 |
| CN100400778C true CN100400778C (en) | 2008-07-09 |
Family
ID=34984682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100554431A Active CN100400778C (en) | 2004-03-22 | 2005-03-17 | Method of reinforcing opening of steel frame girder |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20050204690A1 (en) |
| JP (1) | JP3996931B2 (en) |
| CN (1) | CN100400778C (en) |
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|---|---|---|---|---|
| JP2007205162A (en) * | 2004-03-22 | 2007-08-16 | Ishihara:Kk | Method of reinforcing opening of steel frame girder |
| GB2425506B (en) | 2005-04-26 | 2010-11-10 | Pvaxx Res & Dev Ltd | Load carrying apparatus and method of manufacture |
| KR100860478B1 (en) * | 2007-04-16 | 2008-09-26 | 주식회사 동성진흥 | Beam of steel frame construction |
| JP5133074B2 (en) * | 2008-01-11 | 2013-01-30 | 日立機材株式会社 | Beam reinforcing bracket, beam reinforcing bracket and beam fixing method |
| JP5474411B2 (en) * | 2009-06-12 | 2014-04-16 | 旭化成建材株式会社 | Ring steel for building structures |
| CN102400564A (en) * | 2011-08-15 | 2012-04-04 | 建研科技股份有限公司 | Temporary underpinning system for masonry structure bearing wall rear opening and construction method thereof |
| CN103790377B (en) * | 2012-10-29 | 2015-11-25 | 五冶集团上海有限公司 | Heavy embedded part installation accuracy control method |
| CN105545005B (en) * | 2016-02-03 | 2017-09-01 | 北京堡瑞思减震科技有限公司 | Angle steel bracing reinforcement device and its installation method |
| JP2019116759A (en) * | 2017-12-27 | 2019-07-18 | 三商株式会社 | Fire-resistant resin molded product, fire-resistant structure for structural member, and method for constructing fire-resistant structural member |
| US10648167B2 (en) | 2018-03-14 | 2020-05-12 | Nucor Corporation | Slotted joist seat structure and methods of designing and building the structure |
| KR102215144B1 (en) * | 2020-09-04 | 2021-02-10 | 태영강건(주) | Steel frame of beam reinforced with steel pipe and concrete composite column and steel plate sleeve and its construction method |
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2005
- 2005-02-28 JP JP2005052903A patent/JP3996931B2/en active Active
- 2005-03-17 CN CNB2005100554431A patent/CN100400778C/en active Active
- 2005-03-22 US US11/085,847 patent/US20050204690A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07238635A (en) * | 1994-02-28 | 1995-09-12 | Taisei Corp | Web opening part reinforcing method of steel structural beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1673473A (en) | 2005-09-28 |
| JP2006183444A (en) | 2006-07-13 |
| JP3996931B2 (en) | 2007-10-24 |
| US20050204690A1 (en) | 2005-09-22 |
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