US2303394A - Prestressing reinforced concrete - Google Patents

Prestressing reinforced concrete Download PDF

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Publication number
US2303394A
US2303394A US320028A US32002840A US2303394A US 2303394 A US2303394 A US 2303394A US 320028 A US320028 A US 320028A US 32002840 A US32002840 A US 32002840A US 2303394 A US2303394 A US 2303394A
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United States
Prior art keywords
concrete
compression
compression member
members
tension
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Expired - Lifetime
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US320028A
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English (en)
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Schorer Herman
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Individual
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Individual
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Priority to US320028A priority Critical patent/US2303394A/en
Priority to GB356/41A priority patent/GB540714A/en
Priority to CH228596D priority patent/CH228596A/de
Priority to FR870671D priority patent/FR870671A/fr
Application granted granted Critical
Publication of US2303394A publication Critical patent/US2303394A/en
Anticipated expiration legal-status Critical
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/043—Wire anchoring or tensioning means for the reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/06—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed for the production of elongated articles

Definitions

  • 'I'he present invention relates to means for prevstressing or applying initial compression on reinforced concrete, more particularly to va prestressing unit by means of which initial compression can be applied to monolithic reinforced concrete structures of any size and conilguration during the construction process.
  • the units .according to the invention can be used in connection with monolithic concrete structures of any outside configuration and can be embedded in said structures wherever precompression is most desirable, i. e., preferably in such parts of the concrete where later on, when the concrete is in actual use, tensile stresses occur.
  • tained prestressable reinforcing units according to the present invention can be manufactured in standardized sizes and conveniently shipped in disassembled or assembled condition. Their application is much more general than that of conventional methods and devices.
  • Figure 1 is a side view of the precompressing and prestresslng unit according to the present invention.
  • Figure 2 is a cross sectional view of the unit shown in Figure 1 and taken along line H- Figure 3 is an end view of the unit shown in'- Figure 1.
  • Figure 4 is a part sectional view of the unit according to the present invention embedded in concrete and in normal operating condition.
  • Figure 5 is a side view of a modied precompressing unit according to the present invention.
  • Figure 6 is a side view of a modied spacer according to the present invention.
  • Figure 7 is a side view of a -wire contracting member used in the unit. according to Figure 5.
  • Figure V is a longitudinal sectional view of a modified wire stretching end member.
  • Figure 9 is a part cross sectional'and part end view of the member illustrated in Figure 8 and taken along line IX.-lX of said ligure.
  • Figure. 10 is a constructional concrete element reinforced and precompressed according to the present invention.
  • Figure l1 is a cross sectional view of the element shown in Figure 10 and taken along line XI-XI in said figure.
  • Figure 12 is a cross'sectional view of the element shown in Figure 10 and taken along line XII-XII in said figure.
  • Figures 1 to I designates a longitudinal-compression member, such as a steelrod of great strength which passes through the center of the spacing members 2 which are disposed along the rod at regular intervals.
  • Member l which, in case of larger units,
  • Tube or sheath I0 made of parafiined paper or similar material. 'I'he purpose of this tube is to prevent mortar from bonding with the compression rod i, and to permit sliding of the rod within tube and spacers.
  • the spacers may consist of cast iron, tile or precast concrete blocks, having surfaces that willV provide adequate bond when embedded in mortar.
  • Tension means 3 and 4 in the form of thin high strength steel wires are disposed around center rod I and placed substantially over the periphery of the spacers 2. Two substantially like sets of tension means are provided which are wound in steep helices and in opposite direction around the column formed by the center member I and the spacers 2.
  • are provided on the spacers 2 for keeping the wires 3 and 4 apart and preventing direct intersection of and kinks in the wires.
  • a bolt 1 is screwed into the nut member and is provided with a cavity 8 at its threaded end for receiving the end of compression member I.
  • a steel ball 9 may be inserted in the cavity 8 for reducing friction between rod I and bolt 1 and torsion when bolt 1 is tightened.
  • a tensioning mechanism as described in the paragraph next above' may be provided at each end or at one end only of the prestressing unit.
  • an end or anchorage member is provided at one end of the unit as shown at the left side of Figure 1.
  • the wires 3 and 4 form loops around the lugs 6' projecting from the end block 5.
  • Block 5' is provided with a cavity 8" holding a ball 9" against which the center rod I abuts.
  • Warping or buckling of the compression member I in spite of the relatively high compressive stress in said member, is prevented by the spacers 2 which actv as elastic supports due to the radial force eifect produced by the tension members 3 and 4.
  • Torsional forces on the end supports composed of parts 5, 6, and 1 or 5' and 6' are absent on account of thetwo series of tension windings arranged in opposite directions.
  • Theoretical considerations as well as practical experience prove that, already with a rather steep pitch of the windings of means 3 and 4, the necessary stability can be obtained also under extreme stress conditions.
  • unit according to the present invention may be bent to form a flat curve and will snap back into a straight line as soon as the external bending forces are removed.
  • FIG. 5 A modification of the prestressed unit according to the present invention is shown in Figures 5 to 8.
  • a compression member is provided composed of a plurality of rods 2
  • said member is surrounded byV means of tubes I0' made of paraflined paper or the like.
  • a plurality of Wires 23 are arranged in planes radiating from the central member 20.
  • the wires 23 are spaced from the central member by means of spacers 24, illustrated in Figure 6, which have a rounded axial outer contour 25 to avoid sharp bends in the wires and which have diametrically opposite projections 25 to keep the wires apartand pairv wise in diametrical planes.
  • Figures 5 and 6 can also be used for producing a unit according to Figure 1 instead of the spacers of the type shown in Figures 1 and 2.
  • Undesired contact of the wires of the two sets of wires wound in opposite direction is avoided by placing the wires of one set over the surfaces 44 on the larger diameter and the wires of the other set over the surfaces on. the smaller diameter.
  • Member 21 has openings 29 through which pass the Wires 23 and which openings are disposed on smaller diameters than the outer and wire supporting surface of the spacers 24.
  • Openings 29 through which pass the Wires 23 and which openings are disposed on smaller diameters than the outer and wire supporting surface of the spacers 24.
  • an end unit may be used as shown on the right hand side of Figure 1.
  • av mechanism as shown on the right hand side of Figure 5 and in Figures 8 and 9 may be preferable.
  • the mechanism consists of a central member 29 of angular cross sectional congurations and having anges 30 and 3I.
  • the tension wires 23 enter the structure through flared openings 32 in flange 3I and pairwise run along the knurled surfaces 33 and individually into the holes 34 in flange 30. They are firmly and preliminarily held in said holes by means' of screws 35.
  • cover plates 36 having knurled surfaces 31 corresponding to the surfaces 33 are pressed onto the wires 23 by means of bolts 39 so that the wires are inescapably held in the stretching end
  • An end plate 39 is placed in a recess at the left end of member 29 and firmly held thereto by means of bolts 40.
  • the central member 20 passes through a bore 4I in plate 33 into the interior 42 of member 29 and is held in correct position by means of plate 39.
  • an interior thread is provided for the threaded bolt 43.
  • This bolt is the equivalent to bolt 1 and its end is also provided with a.
  • the boards II are removed By releasing the bolts 1 or 43 the compressive force in members I or 20 isgradually transferred to the concrete.
  • the end supports are removed and the tension wires are cut along the exterior face of the concrete.
  • the compression members may also be cut and left in place or may be pulled out for reuse.
  • the tube section near the face of the concrete is removed and the small holes are closed with a stiff mortar. Rusting at the end of the tension wires is prevented by rubbing the concrete face with cement mortar or by the vapplication of a thin plaster coat I2.4 Under certain conditions it may be advantageous to place the end support nut or the unit 29, 36 inside the form and to leave it embedded in concrete for end anchorage of the tension wires.
  • Figures 10 to 12 show the application of prestressed reinforcing units according to the invention to the construction of a concrete girder I1.
  • the units I3, I4 and I5 are placed in a longitudinal direction, so as to cause maximum compression at the bottom of the girder near the center of the span I8 and nearly uniform compression over the end faces I9.
  • units I3 and I5 are placed along the top and bottom side of the girder respectively.
  • Units I4 follow the bottom of the girder near the center portion and are curved upward toward the ends ofthe girder.
  • the prestressed vertical units IB which are arranged closer together at the end portion oi' the girder compress the concrete also in vertical direction. diagonal te'nsion can be effectively eliminated.
  • the usual consideration of shearing stresses no longer presents a limiting factor in a structure prestressed according to the present invention.
  • the holes left by the removed compression members I can be utilized for drainage, electric conduits, heating or cooling purposes, etc.
  • a stretching mechanism comprising a stretching mechanism, a longitudifor concrete, comprising a stretching mechanism including operable means and anchorage' means.
  • a rodlike central compression member having ends individually abutting said operable means and said anchorage means, sheath means enclosing said compression member,A said compression member being slideably movable in said sheath means, and a plurality of wirelike tension members spaced from and disposed symmetrically around said compression member and having. ends individually connected to said anchorage means and to said operable means.
  • a precompressing reinforcing mechanism for concrete comprising a central, column-like compression member, a plurality of spacers disposed on said member and being spaced from one another, a plurality of longitudinal tension members disposed symmetrically around said compression member and resting on said spacers and being thereby spaced from said compression member, a stretching mechanism connected to and holding the ends of said tension membersrand abutting said compression member and adapted to stretch said tension members and lsimultaneously transmit the stretching force reaction thereof to said compression member.
  • a self-contained reinforcing mechanism for subjecting concrete to permanent internal compression comprising a central compression member, a plurality of spacers disposed on said member and being equally spaced from one another, two sets of Wirelike tension members helically Wound in opposite direction around said compression member and resting on said spacers and being spaced thereby from said compression member, an adjustable tension mechanism connected to and holding one end of .said tension members, and anchorage means connected to the other end of said tension members, said tensioning mechanism and said anchorage means individually abutting the individual ends of said compression member and exerting a pull on said tension members and simultaneously transmitting the tension force reaction of said tension members to the ends of said compression member.
  • a precompressing reinforcing mechanism ⁇ for concrete comprising a central compression member, sheath means loosely surrounding said compression member, a plurality of spacers provided with recesses and projections disposed on said member and being equally spaced from one another by said sheath means, said compression member being freely longitudinally movable inside said sheath means and said spacers, two sets of wirelike tension members wound hel-ically in opposite direction around said compression member and spaced therefrom by means of said spacers, oneset ofksaid tension members resting in said recesses and the other set resting on saidA projections vand being separated thereby from one another, and a tensioning mechanism including 'a nut member connected to one of the ends of said tension members and abolt member screwed into said nu't member and abutting one end of said compression member and anchorage means connected with the other ends of said tension members and abutting the other vend or.' said compression member, said tensioning ⁇ mechanism tensioning said tension members upon relative motion of said bolt member with
  • a self-contained prestressing mechanism for concrete comprising a central compression member, a plurality of wheellike spacer members axially slideably disposed on said compression member, tubular sheathing means coaxially and slideably disposed on said compression member and between and spacing said spacer members from o e another, two sets of tension wires 'wound in: opposite direction in steep helices around said compression member and being spaced from said member by means of said spacer members, and a tensioning mechanism including a bolt member having a cavity for receiving one end of said compression member, a ball member disposed in said cavity and affording free rotational movement of said bolt member with respect to said compression member, and including a nut member connected to one of the ends of said tension wires and screwed to said bolt member, anchorage means connected to the other ends of said tension wires and having a cavity and a ball member therein abutting the other end of said compression member, said mechanism affording tensioning of the tension wires before embedding the latter in concrete and transmitting the tension reaction'
  • a self-contained precompressing reinforcing device for concrete construction comprising a plurality of rodlike central compression members disposed in substantially parallel relation to one another, a plurality of spacers and contracting members alternately disposed in spaced relation to one another on said compression member, a plurality of wirelike tension members laid over said spacers and extending through said contracting members and disposed symmetrically around said compression member and held in flat angled zig-zag position by said spacers and clamped to said central member by means of said clamp members, and athreaded bolt member screwed into the interior thread of said central member and abutting said compression member, said tension members being stretched and the stretch reaction thereof being simultaneously transmitted to said compression member upon rotation of said bolt member relatively to said central member.
  • a self-contained precompressing reinforcing device for concrete construction comprising a rodlike central compression member, a plurality of' spacers and contracting members alternately disposed in spaced relation to one another on said compression member, a plurality of wirelike tension members laidover said spacers and extending through said contracting members and disposed symmetrically around said compression member and held in fiat angled zig-zag position by said spacers and contracting members, and a tensioning mechanism interconnecting said tension members and said compression member,
  • said mechanism comprising a nutlike member connected with said tension members and a threaded bolt member screwed into said nutlike member and abutting said compression member, said tension members being stretched and the stretch reaction thereof being simultaneously transmitted to said compression member upon rotation of said bolt member relatively to said nutlike member.
  • a self-contained precompressing reinforcing device for concrete construction comprising a central compression member, a plurality of spacer members disposed in spaced relation to one another on said compression member, a. plurality of wirelike tension members disposed symmetrically around said compression member and spaced from said compression member by said spacer members, and a tensioning mechanism interconnecting said tension members and said compression member, said mechanism comprising a hollow central member having an interior thread and an outer surface, a plurality of clamp members having surfaces corresponding to portions of said outer surface and being disposed opposite thereto, said tension members extending individually between the surface of said central member and the surfaces of individuals of said clamp members and being firmly clamped to said central member by means of said clamp members, and a threaded bolt member screwed into the interior thread of said central member and abutting said compression member, said tension members being stretched and the stretch reaction thereof being simultaneously transmitted to said compression member upon rotation of said bolt member relatively to said central member.
  • a prestressed reinforced concrete construe tion comprising a monolithic mass of concrete
  • a precompressing mechanism disposed at a portion of said concrete mass subjected to tensile or shearing stresses when in normal use, said mechanism comprising a rodlike compression member removably embedded in the concrete, a plurality of wirelike tension members substantially equally spaced from and disposed substantially symmetrically around said compression member and permanently embedded in said concrete mass and in intimate contact therewith, and
  • a stressing mechanism disposed outside of said concrete mass and abutting one end of said compression member and firmly connected to the ends of said tension members, said tension members being tensioned before the concrete is placed by means of said stressing mechanism and being released and compressing the adhering concrete after the concrete has hardened.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Reinforcement Elements For Buildings (AREA)
US320028A 1940-02-21 1940-02-21 Prestressing reinforced concrete Expired - Lifetime US2303394A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US320028A US2303394A (en) 1940-02-21 1940-02-21 Prestressing reinforced concrete
GB356/41A GB540714A (en) 1940-02-21 1941-01-10 Improvements in or relating to reinforced concrete construction
CH228596D CH228596A (de) 1940-02-21 1941-01-14 Bewehrungseinheit für Betonkörper, mit biegsamen Bewehrungselementen und mit Spannvorrichtung für diese letzteren.
FR870671D FR870671A (fr) 1940-02-21 1941-02-20 Mode de construction en béton, dans lequel les pièces soumises en fonctionnement normal à des efforts de traction et de cisaillement, reçoivent une tension initiale,et dispositif pour cette mise en tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US320028A US2303394A (en) 1940-02-21 1940-02-21 Prestressing reinforced concrete

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US2303394A true US2303394A (en) 1942-12-01

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US320028A Expired - Lifetime US2303394A (en) 1940-02-21 1940-02-21 Prestressing reinforced concrete

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US (1) US2303394A (fr)
CH (1) CH228596A (fr)
FR (1) FR870671A (fr)
GB (1) GB540714A (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435998A (en) * 1943-03-31 1948-02-17 Porete Mfg Company Composite prestressed concrete beam and slab structure
US2449276A (en) * 1943-09-30 1948-09-14 Chalos Marcel Pretensioned reinforcement
US2579183A (en) * 1943-06-29 1951-12-18 Freysainet Eugene Method for tensioning reinforcements
US2614801A (en) * 1950-07-26 1952-10-21 Aircraft Hardware Mfg Co Inc Wire holding and prestressing device
US2637895A (en) * 1942-03-21 1953-05-12 Emile Jules Lucien Blaton Method of tensioning and anchoring wire bundles for prestressed concrete structural elements
US2677956A (en) * 1950-11-13 1954-05-11 Schorer Corp Prestressing and reinforcing apparatus for concrete structures
US2681562A (en) * 1951-06-07 1954-06-22 Clarke Lawrence Concrete wall
US2963273A (en) * 1957-11-21 1960-12-06 Abhot A Lane Rod assembly for prestressed concrete
US3022713A (en) * 1954-11-26 1962-02-27 Bengt F Friberg Prestressed concrete structures
US3041702A (en) * 1957-10-15 1962-07-03 United States Steel Corp Method of making a prestressed reinforced concrete structure
US3084481A (en) * 1958-12-19 1963-04-09 Silberkuhl Wilhelm Johannes Prestressed concrete bodies
US3088187A (en) * 1959-06-03 1963-05-07 Justice Company Process of making elongated stressed concrete structures
US3162709A (en) * 1961-07-31 1964-12-22 American Form & Equipment Co Method of forming prestressed tubular structures
US3167882A (en) * 1960-12-14 1965-02-02 Fmc Corp Means for and method of prestressing concrete
US3855742A (en) * 1970-07-23 1974-12-24 Texas Dynamatics Apparatus for prestressing a structural member
US3948010A (en) * 1971-12-17 1976-04-06 Sonneville Roger P Reinforcing device for an element of prestressed concrete
US3950905A (en) * 1972-04-26 1976-04-20 Jeter John D Method for prestressing a structural member
US4313287A (en) * 1980-01-25 1982-02-02 Romig Jr Byron A Internally tensioned structural member and method of assembling same
US4398377A (en) * 1980-01-25 1983-08-16 Romig Jr Byron A Structural member with equalized internal tension
US4704754A (en) * 1982-04-28 1987-11-10 Bonasso S G Tension arch structure
US20040065030A1 (en) * 2002-10-04 2004-04-08 Sergio Zambelli Device for connecting a beam to pillars or similar supporting structural elements for erecting buildings
US20150275462A1 (en) * 2012-02-02 2015-10-01 Empire Technology Development Llc Modular concrete reinforcement
US20160168855A1 (en) * 2013-08-01 2016-06-16 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member
CN115534099A (zh) * 2022-10-21 2022-12-30 柳州欧维姆机械股份有限公司 一种钢绞线先张法预应力锚固体系及其施工方法
WO2024025790A1 (fr) * 2022-07-26 2024-02-01 Fsc Technologies Llc Ensemble
US20240093494A1 (en) * 2020-12-16 2024-03-21 Sumitomo Mitsui Construction Co., Ltd. Anchoring device and prestressed concrete

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223497A (en) * 1978-06-26 1980-09-23 Ccl Systems Limited Coupling assembly
FR2462528A1 (fr) * 1979-07-27 1981-02-13 Campenon Bernard Procede et dispositifs de mise sous tension d'armatures pour ouvrages en beton precontraint

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637895A (en) * 1942-03-21 1953-05-12 Emile Jules Lucien Blaton Method of tensioning and anchoring wire bundles for prestressed concrete structural elements
US2435998A (en) * 1943-03-31 1948-02-17 Porete Mfg Company Composite prestressed concrete beam and slab structure
US2579183A (en) * 1943-06-29 1951-12-18 Freysainet Eugene Method for tensioning reinforcements
US2449276A (en) * 1943-09-30 1948-09-14 Chalos Marcel Pretensioned reinforcement
US2614801A (en) * 1950-07-26 1952-10-21 Aircraft Hardware Mfg Co Inc Wire holding and prestressing device
US2677956A (en) * 1950-11-13 1954-05-11 Schorer Corp Prestressing and reinforcing apparatus for concrete structures
US2681562A (en) * 1951-06-07 1954-06-22 Clarke Lawrence Concrete wall
US3022713A (en) * 1954-11-26 1962-02-27 Bengt F Friberg Prestressed concrete structures
US3041702A (en) * 1957-10-15 1962-07-03 United States Steel Corp Method of making a prestressed reinforced concrete structure
US2963273A (en) * 1957-11-21 1960-12-06 Abhot A Lane Rod assembly for prestressed concrete
US3084481A (en) * 1958-12-19 1963-04-09 Silberkuhl Wilhelm Johannes Prestressed concrete bodies
US3088187A (en) * 1959-06-03 1963-05-07 Justice Company Process of making elongated stressed concrete structures
US3167882A (en) * 1960-12-14 1965-02-02 Fmc Corp Means for and method of prestressing concrete
US3162709A (en) * 1961-07-31 1964-12-22 American Form & Equipment Co Method of forming prestressed tubular structures
US3855742A (en) * 1970-07-23 1974-12-24 Texas Dynamatics Apparatus for prestressing a structural member
US3948010A (en) * 1971-12-17 1976-04-06 Sonneville Roger P Reinforcing device for an element of prestressed concrete
US3950905A (en) * 1972-04-26 1976-04-20 Jeter John D Method for prestressing a structural member
US4313287A (en) * 1980-01-25 1982-02-02 Romig Jr Byron A Internally tensioned structural member and method of assembling same
US4398377A (en) * 1980-01-25 1983-08-16 Romig Jr Byron A Structural member with equalized internal tension
US4704754A (en) * 1982-04-28 1987-11-10 Bonasso S G Tension arch structure
US7287358B2 (en) * 2002-10-04 2007-10-30 Sergio Zambelli Device for connecting a beam to pillars or similar supporting structural elements for erecting buildings
US20040065030A1 (en) * 2002-10-04 2004-04-08 Sergio Zambelli Device for connecting a beam to pillars or similar supporting structural elements for erecting buildings
US20150275462A1 (en) * 2012-02-02 2015-10-01 Empire Technology Development Llc Modular concrete reinforcement
US9725867B2 (en) * 2012-02-02 2017-08-08 Empire Technology Development Llc Modular concrete reinforcement
US20160168855A1 (en) * 2013-08-01 2016-06-16 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member
US10889988B2 (en) 2013-08-01 2021-01-12 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member
US20240093494A1 (en) * 2020-12-16 2024-03-21 Sumitomo Mitsui Construction Co., Ltd. Anchoring device and prestressed concrete
WO2024025790A1 (fr) * 2022-07-26 2024-02-01 Fsc Technologies Llc Ensemble
CN115534099A (zh) * 2022-10-21 2022-12-30 柳州欧维姆机械股份有限公司 一种钢绞线先张法预应力锚固体系及其施工方法

Also Published As

Publication number Publication date
CH228596A (de) 1943-09-15
GB540714A (en) 1941-10-27
FR870671A (fr) 1942-03-20

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