WO2006080677A1 - Tsc beam formed with bottle neck top flange - Google Patents

Tsc beam formed with bottle neck top flange Download PDF

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Publication number
WO2006080677A1
WO2006080677A1 PCT/KR2005/003260 KR2005003260W WO2006080677A1 WO 2006080677 A1 WO2006080677 A1 WO 2006080677A1 KR 2005003260 W KR2005003260 W KR 2005003260W WO 2006080677 A1 WO2006080677 A1 WO 2006080677A1
Authority
WO
WIPO (PCT)
Prior art keywords
top flange
flange
role
takes
web
Prior art date
Application number
PCT/KR2005/003260
Other languages
French (fr)
Inventor
Chang Nam Lee
Original Assignee
Chang Nam Lee
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR10-2004-0079745 external-priority
Application filed by Chang Nam Lee filed Critical Chang Nam Lee
Publication of WO2006080677A1 publication Critical patent/WO2006080677A1/en

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Classifications

    • 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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
    • 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
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • 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
    • E04C2003/0426—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 material distribution in cross section
    • E04C2003/0434—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 material distribution in cross section the open cross-section free of enclosed cavities
    • 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
    • E04C2003/0473—U- or C-shaped

Abstract

TSC beam formed with bottle neck top flange(BNTSC Beam), which attached shear connectors easily to top flange in spite of producing with a steel sheet of less than 6mm thick and secured economical efficiency, has been developed. BNTSC Beam of the present invention makes it possible for ir’s the total width to be narrow, and it makes possible the size of its column attached small in Figure 1. BNSTC Beam can attach bolt+steel pipe(7) shear connectors easily and low cost instead of welding. Web(3) of BNTSC Beam(1) takes a stirrup of reinforced concrete beam role. Top flange(2) has charge of a compressive force of bending during construction period. As level part of top flange is used into projection putting up deck plate(9) and is inside of web(3), it takes effect that dwindles torsion moment twisting by eccentric load. The vertical part of top flange takes a role the inserts bolt+steel pipe base fixing nuts(8) and shear connector role and as bond stress itself. The above bolt+steel pipe keeps up width between left and right top flanges. And it prevents lateral buckling induced by compressive force of bending during construction period, takes a foothold role during working, makes it to pass the bottom reinforcing bar of slab into tenon reinforcing bar(36) through extra bolt holes(6). As top flange is formed with bottleneck, the possibility of interfacial phenomena concrete and web plates can be excluded. Bottom flange(4) is a tensile material against bending tensile strength, and Yshape projection(5) takes a role that increase cross section of tensile material by bending moment and takes a groove role welding two pieces of bilateral symmetry.

Description

Description TSC BEAM FORMED WITH BOTTLE NECK TOP FLANGE
Technical Field
[1] The Present invention relates to TSC beam formed with bottle neck top flange(BNTSC Beam ) that can be superior in competition with structure of reinforced concrete
[2]
Background Art
[3] The reason that the above TSC beams are produced in various shapes by size is has the limit of cold bending of steel plates by thickness and the limit of width of hot coils available and size of forming equipment.
[4] Top flange of all these four types is the type that projects from left and right of top web to the level direction outside. Top flange has the weak point that the width is 90mm because of being background attaching shear connector (stud type of Fig. 5, 6, 7 or L shape steel shear connector of Fig. 3, 4) unifying slab and TSC beam and the whole width of beam broadens a lot as well as bird's mouth putting up deck plate to pour slab concrete. Also, top flange of TSC beam is the top open that left and right is separated. So, when shear connector of stud type is used, it have to tie with transverse member (27, 37) apart such as from Figure 3 to 7 to prevent lateral buckling by the lateral pressure of bending during construction period and resist the lateral pressure of concrete filled inside.
[5] Therefore, as TSC beam has been produced with only a steel sheet of more than
6mm by now, the use of an extra-large-sized, large-sized, middle-sized TSC beam in long span for high load is active. And, especially, a middle-sized TSC beam is produced in large quantities due to assembly work in factory and its supply has been spreading gradually. Meanwhile, when short span for static load is applied, to be sure, a small-sized TSC beam made of the steel of less than 6mm is superior in competition with structure of reinforced concrete in common. But, it is difficult to carry out (Fig. 5) attaching conventional shear connector to top flange of a small-sized TSC made of the steel of less than 6mm and it costs a great deal.
[6]
[7]
Disclosure of Invention Technical Problem
[8] A extra large and large-sized TSC beam (a large-sized TSC beam is less than
10mm thick, and if more than that, a extra large TSC beam), whose height of web is more than 600mm, and a middle-sized TSC beam, whose height of web is more than 300mm and less than 600mm, has got successful results, but a small-sized TSC beam, whose a thickness of steel is thin about 3 to 6mm and each height of web is small about 100 to 300mm, has to find how to attach shear connector without welding to top flange, and it can be superior in competition with any other structure.
[9] A small-sized TSC beam (20) welds L shape steel between left and right of web and keeps gaps and prevents buckling by the lateral pressure of bending and is used as the foothold of working, but it is uneconomic and can cause inferior goods because cross section of L shape steel itself is large, so it need new way not to weld. As top flange (22) of the small-sized TSC beam projects outside of left and right of web (23), the whole width of the beam broadens relatively and has a limit in reducing the size of column attached. So, it needs means that resist torsion moment by eccentric load during construction period. Also, it needs the measure that can control interfacial phenomena that can be occurred in the interface of web plates with concrete shrinkage due to during hardening of concrete filled inside.
[10] The worst point of the small-sized TSC beam is that the cross section of its top flange is much smaller than that of bottom flange. So, it needs the measure that can prevent increasing number of temporary supports for controlling deflection before during curing of concrete because of small section modulus and moment of Inertia.
[H]
Technical Solution
[12] Therefore, the purpose of the present invention is to develop TSC beam formed with bottle neck top flange (BNTSC Beam, 1) that can be superior in competition with structure of reinforced concrete.
[13] As the whole width of beam is narrow and the size of column joined become.
Small in Figure 1, BNTSC Beam of the present invention can attach easily economic bolt + steel pipe (7) shear connector without depending on welding. So, In the future, if a middle-sized TSC beam cold formed in coil in factory changes into top flange of BNTSC beam, it can be superior in competition with steel construction and structure of reinforced concrete, too. Now an extra-large-sized, large-sized, and middle-sized TSC beams are economic by 20 to 30 percent over common steel used H shape steel. And they are used to many buildings that need the reduction of a construction periods and floor-to-floor heights because of the cost of construction similar to reinforced concrete.
[14] A small-sized TSC beam is permanent form and member cold formed a steel coil of 3 to 6mm continuously into W shape like Figure 3. Like Figure 4, it is to construct composite beam that It is to weld, putting on L shape steel (27) by 20 to 30cm across inside of between top flanges (22) projected from left and right web (23) to the level direction outside to take a role as shear connector (shear connector unifying the lower end of a small-sized TSC beam and top concrete slab) and put deck plate (29) outside of top flange of TSC beam nearby and then pour inside of a small-sized TSC beam and slab (30) concrete in a single body and construct composite beam.
[15] Standard of shear connector, as stud type like Figure 5, uses stud to instant electric adhesion, and it is secured that thickness of steel have to be more than 6mm to adhere at least stud of 16mm in diameter. Therefore, using to a middle-sized, large-sized, and extra-large-sized TSC beam is suited, but a small-sized TSC beam welds L shape steel instead of shear connector of stud type and keeps gaps between left and right of web and prevents buckling by the lateral pressure of bending and is used as the foothold of working. But, L shape steel can make inferior goods during welding and it is difficult and uneconomic to secure welding works putting on top flange although cross section of L shape steel itself is large.
[16] As the top flange of the small-sized TSC beam projects outside of left and right of web, the whole width of beam broadens relatively and has a limit in reducing the size of column attached. The top flange of the small-sized TSC beam, as TSC beam of more than middle-size, projects outside and it is difficult to resist twisting bond stress by eccentric load during construction. Also, to project for top flange of the small-sized TSC beam outside can cause interfacial phenomena between web and concrete in case that shrinkage of concrete filled inside is large.
[ 17] The worst point of the small-sized TSC beam is that the cross section of its top flange is much smaller than that of bottom flange. And it is inefficient structurally and increases construction support numbers for controlling deflection before being completed curing of concrete because of small section modulus and moment of Inertia.
[18]
Advantageous Effects
[19] BNTSC beam can be used as permanent concrete form and member for small steel concrete beam that span of the spot is short or unit load for design isn t large. And as the BNTSC beam has economical efficiency full with the unit cost of production, construct ability and economical efficiency of shear connector, and reduction of temporary support numbers, it can be superior in competition with structure of common reinforced concrete. And it has the effect that makes equal a term of works and a steel frame equal. Also, it is a great help to reduction of the cost of construction indirectly due to decreasing floor height of building because height of BNTSC beam has decreased. Meanwhile, if top flange (22) of the middle-sized TSC beam changes into TSC beam formed with bottle neck, the shapes can be standardized.
[20] Brief Description of the Drawings
[21] Fig.l is perspective view attaching bolt + steel pipe shear connector to beam.
[22] Fig.2 is the composite beam composed BNTSC beam and floor slab.
[23] Fig.3 is perspective view welding shear connector of L shape to a small-sized TSC beam.
[24] Fig.4 is the composite beam composed small-sized TSC beam and floor slab.
[25] Fig.5 is perspective view welding shear connector of stud type and member for traverse apart to a small-sized TSC beam. [26] Fig.6 is perspective view welding shear connector of stud type and member for traverse apart to a middle-sized TSC beam. [27] Fig.7 is perspective view welding shear connector of stud type and member for traverse apart to a large-sized TSC beam. [28] Fig.8 is perspective view welding shear connector of stud type and member for traverse apart to an extra-large-sized TSC beam. [29] <Simple explanation about signs and terms of the figure>
[30] 1 : TSC beam formed with bottle neck top flange (BNTSC Beam)
[31] 2, 22 : top flange
[32] 3, 23 : web
[33] 4, 24 : bottom flange
[34] 5, 35 : Y type projection
[35] 6 : a bolt hole
[36] 7 : bolt + steel pipe
[37] 8 : nut
[38] 9, 29 : deck plate
[39] 10, 30 : slab
[40] 20 : a small-sized TSC beam
[41] 25 : tenon shape
[42] 27 : L-Shape
[43] 28 : stud
[44] 36 : tenon reinforcing bar (bottom bar of slab)
[45] 37 : member for traverse
[46]
Mode for the Invention [47] BNTSC beam (1) is permanent concrete form and structural member cold formed continually with steel coil of 3 to 6mm and the outline its top flange section has form with bottleneck. Concrete pour into permanent form formed with bottleneck, and it can have internal force of bending by compositing steel and concrete and left and right of web (3) takes a stirrup role, shear reinforcing bar of common reinforcing concrete beam. A couple of left and right top flange, as D shape, keeps certain gaps, turns towards its back each other, and its section has form with bottleneck and it takes charge of compression force of bending until slab concrete secures prescribed compressive strength.
[48] The vertical part of top flange takes the base role that inserts bolt + steel pipe(7), shear connector, into the bolt hole (6) made in advance and attaches into a nut and shear connector role as bond stress itself. The above bolt + steel pipe keeps width between left and right top flange, and it prevents buckling by the lateral pressure of bending and is used as the foothold of working. As top flange has form with bottleneck, it can exclude interfacial phenomena with concrete in BNTSC beam (1) and web.
[49] The horizontal part of top flange prevents lateral buckling of the vertical part and getting damaged and doing damage in dealing. Also, as the section of the vertical part and horizontal part of top flange is concealed in concrete slab, it doesn t have influence on height increasing the beam depth, and it has secondary profits that value of section modulus and moment of Inertia becomes large. Thus, efficiency of structural section becomes large, and it is linked directly with improving economical efficiency.
[50] The bottom flange (4) connected horizontally in the lower edge left and right of web is tensile member against tensile strength of bending. And it takes the role that adds Y shape projection and increases cross section of tensile member of bending and promotes bond stress with concrete, and it takes the groove role welding two pieces of left and right.
[51] In Figure 1, in the vertical upper part of top flange, it is made bolt hole of 14 to 15 mm in diameter by 100mm in cold forming factory. And it is inserted bolt + steel at intervals suited to applying to quantities needed on structural calculation and a foothold for passing, and it is fixed with nuts to the outside of the vertical part of top flange. The rest bolt holes (6) are applied to perforation hole for partly continuity of the bottom reinforcing bar of slab.

Claims

Claims
[1] Top flange (2) formed in D shape of tapered section and web (3) connected vertically in the lower end of top flange and bottom flange (4) in the lower edge connecting web and Y shape projection (5)formed inside in the middle of bottom flange the one that cold formed the above top flange, web, and bottom flange in one body is arranged in bilateral symmetry, and it welds to groove of the middle of the bottom, and TSC beam formed with bottle neck top flange has characteristics that a part of the top is opened.
[2] In Claim 1, top flange (2) forms three sides the horizontal part of the top, the vertical part of the top, and the horizontal part of the bottom, and it forms in D shape of tapered section that the top is shorter than the bottom, in the vertical part of the middle of the above top flange, bolt hole (6) at certain intervals by length is made and a hollowed steel pipe partly is inserted to the hole with a guide inside of left and right of, and bolts are inserted in the inside of steel and nuts is fixed. The bottom reinforcing bar (36) of slab is penetrated in the part not inserting steel pipe out of the above bolt hole (6). And deck plate (9) is installed in the bottom vertical part of the top flange, concrete poured into the inside of BNTSC beam (1) slab, and composite member is formed in one body. This is the very TSC beam formed with bottle neck top flange.
PCT/KR2005/003260 2004-10-06 2005-10-01 Tsc beam formed with bottle neck top flange WO2006080677A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040079745A KR100592398B1 (en) 2004-10-06 2004-10-06 TSC beam formed with bottle neck top flange
KR10-2004-0079745 2004-10-06

Publications (1)

Publication Number Publication Date
WO2006080677A1 true WO2006080677A1 (en) 2006-08-03

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WO (1) WO2006080677A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927916A1 (en) * 2008-02-21 2009-08-28 Jean Louis Desbordes Concrete beam i.e. reinforced concrete joist frame, for constructing e.g. building, has metallic mold with clips welded to side walls by welding seams and connecting concrete web to slab and with upper armatures completing reinforcement
US20100287878A1 (en) * 2009-05-15 2010-11-18 Senvex Co.,Ltd. Structural composite hybrid beam(schb) consisting of cold-formed steel and cast-in-place concrete having attached fire-resistant coating material and constructing method of the schb
ITVI20090198A1 (en) * 2009-07-29 2011-01-30 Fima Cosma Silos S P A METHOD FOR THE REALIZATION OF A MIXED PREFABRICATED BEAM AND MIXED PREFABRICATED BEAM OBTAINED ACCORDING TO THE ABOVE METHOD
DE102011010672A1 (en) * 2011-02-08 2012-08-09 Ssf Ingenieure Ag Surface structure, particularly cover system, for industrial construction and for multi-storey construction, has two supports with composite plates, where intermediate space is provided between supports
ITUD20110048A1 (en) * 2011-03-31 2012-10-01 Panebianco Amalia PREFABRICATED STRUCTURAL PANEL FOR FLOORS
JP2019190109A (en) * 2018-04-24 2019-10-31 国立大学法人東京工業大学 Side-reinforcing rigid structure for steel beam

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KR100777565B1 (en) * 2007-01-05 2007-11-16 이창남 Wire tension method to the partial concrete poured tsc beam
KR100777566B1 (en) * 2007-01-05 2007-11-16 이창남 Reinforcing of tsc beam with wire tension method
KR100872959B1 (en) * 2007-06-11 2008-12-08 (주)센벡스 Tsc beam formed with folded in top flanges
KR100918983B1 (en) * 2007-10-26 2009-09-30 주식회사 에이스스틸 The Steel Concrete beam and it's manufacturing method
KR101042496B1 (en) 2008-03-28 2011-06-16 이창남 Composite Slab Using Floor Level Adjustable Deep Vally Deck Plate
KR101000269B1 (en) 2008-05-07 2010-12-10 이창남 Composite Beam Putting the Truss Deck on the flat bar shelf welded to the web plate of TSC Beam
KR101012010B1 (en) * 2008-06-30 2011-01-31 서울시립대학교 산학협력단 Built-up Beam having Profiled Steel Web
KR100887389B1 (en) * 2008-09-18 2009-03-06 주식회사 성림피에스 Complex slab girder for slim floor
KR101222206B1 (en) * 2010-09-15 2013-01-16 한국건설기술연구원 Composite beam using built-up beam of profiled steel and deck plate
KR101469798B1 (en) * 2013-07-16 2014-12-05 이승우 Composite beam with built-up steel plate
KR101482977B1 (en) * 2013-07-17 2015-01-16 경기대학교 산학협력단 Steel concrete composite beam using profiled plate
KR102234862B1 (en) * 2014-05-02 2021-04-05 재단법인 포항산업과학연구원 Solar cell support structure
CN106836637A (en) * 2017-01-20 2017-06-13 温州大学 Multiple material pipe binding type steel concrete connecting-beam and its construction method
CN113700216A (en) * 2021-09-09 2021-11-26 江苏承天新型建材有限公司 Superstrong withstand voltage girder steel

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KR20030008875A (en) * 2001-07-20 2003-01-29 한국건설기술연구원 steel beam with open section and composite structure using the same
US6543195B2 (en) * 2000-12-08 2003-04-08 Diversakore Llc Composite structural framing system
KR20030086531A (en) * 2003-10-17 2003-11-10 (주)센구조연구소 Formed Steel Plate Concrete Beam

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US5315804A (en) * 1992-09-18 1994-05-31 Hexa-Port International Ltd. Metal framing member
US6058673A (en) * 1996-05-10 2000-05-09 Henkel Corporation Internal reinforcement for hollow structural elements
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927916A1 (en) * 2008-02-21 2009-08-28 Jean Louis Desbordes Concrete beam i.e. reinforced concrete joist frame, for constructing e.g. building, has metallic mold with clips welded to side walls by welding seams and connecting concrete web to slab and with upper armatures completing reinforcement
US20100287878A1 (en) * 2009-05-15 2010-11-18 Senvex Co.,Ltd. Structural composite hybrid beam(schb) consisting of cold-formed steel and cast-in-place concrete having attached fire-resistant coating material and constructing method of the schb
ITVI20090198A1 (en) * 2009-07-29 2011-01-30 Fima Cosma Silos S P A METHOD FOR THE REALIZATION OF A MIXED PREFABRICATED BEAM AND MIXED PREFABRICATED BEAM OBTAINED ACCORDING TO THE ABOVE METHOD
WO2011012974A3 (en) * 2009-07-29 2011-05-05 Fima Cosma Silos S.P.A. Method for manufacturing a precast composite steel and concrete beam and a precast composite steel and concrete beam made according to said method
DE102011010672A1 (en) * 2011-02-08 2012-08-09 Ssf Ingenieure Ag Surface structure, particularly cover system, for industrial construction and for multi-storey construction, has two supports with composite plates, where intermediate space is provided between supports
DE102011010672B4 (en) * 2011-02-08 2014-10-30 Ssf Ingenieure Ag Tensile structure with composite panels
ITUD20110048A1 (en) * 2011-03-31 2012-10-01 Panebianco Amalia PREFABRICATED STRUCTURAL PANEL FOR FLOORS
JP2019190109A (en) * 2018-04-24 2019-10-31 国立大学法人東京工業大学 Side-reinforcing rigid structure for steel beam
JP7072773B2 (en) 2018-04-24 2022-05-23 国立大学法人東京工業大学 Lateral stiffening structure of steel beam

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KR20060030834A (en) 2006-04-11

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