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1. 发明专利

JPH1161989A ULTRA LIGHT-WEIGHT PRESTRESSED CONCRETE 失效
公开(公告)号：JPH1161989A
公开(公告)日：1999-03-05
申请号：JP21335497
申请日：1997-08-07
申请人： DE P KENSETSU KOGYO KK , CHICHIBU ONODA CEMENT CORP
发明人： TAKEMOTO SHINICHI , TAMURA SEI , FUJIWARA HIROKI , SHIBATA TATSUMASA
IPC分类号： E04B1/22 , E04C3/26
摘要： PROBLEM TO BE SOLVED: To initially prestress a concrete block like a pretension system or a post-tension system, by using cable-shaped tension members chiefly composed of bundles of a fiber with a specified Young's modulus for ultra light-weight concrete having a smaller specific gravity than a specified value when dried in the air and a larger compressive strength than a specified value. SOLUTION: The air-dried specific gravity of light-weight concrete is made 1.5 or lighter and the compressive strength thereof is made 30 N/mm or larger. Bundles of fiber having (30×70)×10 N/mm in Young's modulus are knit to form braided cords for the tension members and impregnated with a resin and cured. Since the Young's modulus of the fiber is sufficiently smaller than that of the PC steel member, even when it is used for light-weight concrete having a smaller Young's modulus in comparison with ordinary concrete, it can be initially prestressed. Accordingly, an initial tension such as pretension system or a post-tension system can be applied.

2. 发明专利

JPH09268520A PRECAST PANEL FOR BURIED FRAME AND CONSTRUCTION METHOD OF CONCRETE STRUCTURE USING PANEL 失效
公开(公告)号：JPH09268520A
公开(公告)日：1997-10-14
申请号：JP9936696
申请日：1996-03-27
申请人： ABE KOGYOSHO KK , ORIENTAL CONSTR CO LTD , KAWADA KENSETSU KK , KYOKUTO KOGYO KK , KOWA CONCRETE KK , SHOWA CONCRETE KOGYO KK , SUMITOMO CONST , DE P KENSETSU KOGYO KK , NIPPON KOGEN CONCRETE , NIPPON CONCRETE KK , NIPPON P S KK , NIPPON HUME PIPE , PS KK , P C KYORYO KK , FUJI P S KK
发明人： UMEHARA HIDEAKI , ITO TAKASHI , YAMAMOTO TORU , SAKAGUCHI NOBORU , KONDO MITSUO , TSUBOI MASAKATSU , ISOZUMI YASUO , KURIBAYASHI TAKEHIRO , TANIGUCHI HIROSHI , SHIMAMOTO MITSUO , FURUHASHI MASAYOSHI , KANBE SOUHEI , IWASA SEIJI , MATSUMOTO KIYOTO , HIBINO ISAO , KAMATA EIJI
IPC分类号： E01D21/00 , E01D19/14 , E04B1/16 , E04B2/86 , E04C2/06
摘要： PROBLEM TO BE SOLVED: To preferably use a precast panel for the construction of a large concrete structure and largely rationalize the construction works. SOLUTION: An initial prestressing force is applied in precast concrete panels 2 (2a, 2b) used as sheathing boards for embedded forms at the placing time of concrete on executing a bridge pier 1. These panels are pressed by the side pressure on placing concrete but the prestresses provided in the panels works effectively against the pressure on the panels 2 (2a, 2b). And it is not necessary to remove these panels constituting the form after concrete has been placed and hence, the labor for removing them can be eliminated.

3. 发明专利

JPH09151417A PRESTRESS TO CONCRETE BLOCK FOR FIXING OUTER CABLE OF CONCRETE GIRDER 失效
公开(公告)号：JPH09151417A
公开(公告)日：1997-06-10
申请号：JP31420595
申请日：1995-12-01
申请人： DE P KENSETSU KOGYO KK
发明人： SUZUKI RYOSUKE
IPC分类号： E01D21/00 , E01D1/00 , E01D2/00 , E01D19/12 , E01D22/00 , E01D101/26 , E01D101/28 , E04C3/26 , E04G21/12
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of tension work by forming threads at both ends of tension material inserted through concrete blocks, and laying connecting members with threads formed at end parts, between the end parts of the adjacent tension material, and connecting the tension material and the connecting members. SOLUTION: At the time of loading prestress for the reinforcement of a plurality of concrete girders 1, disposed parallelly in the width direction of a bridge girder, on the outside of the concrete girders 1, concrete blocks 2, 2 are installed on both sides of each concrete girder 1, and tension material 3 are inserted through between both ends of a pair of concrete blocks 2, 2 with the concrete girder 1 held between, and temporarily fastened. Thread parts are formed at both end parts of the tension material 3 inserted through in the concrete blocks 2, and connecting members 4 with thread parts formed at both end parts are laid between the end parts of tension material 3, 3 adjacent on the same line. The tension material 3 and the connecting member 4 are connected to make a plurality of tension material 3 on the same line into one line. Prestress loading work is thereby simplified, and the dispersion of tensile force can be prevented.

4. 发明专利

JPH06330585A ANCHORAGE METHOD FOR FRP TENDON FOR PRESTRESSED CONCRETE PAVEMENT 失效
公开(公告)号：JPH06330585A
公开(公告)日：1994-11-29
申请号：JP14434093
申请日：1993-05-25
申请人： UNYUSHO KOWAN GIJUTSU KENKYUSH , UNYUSHO DAINI KOWAN KENSETSUKY , PS KK , ORIENTAL KENSETSU KK , FUJI P S KK , DE P KENSETSU KOGYO KK , NIPPON KOEI CO LTD
发明人： FUKUTE TSUTOMU , YATANI YOSHITAKA , HAYATA SHUICHI , KATAYAMA TADASHI , INUKAI HARUO , NAKABASHI KAZUHISA
IPC分类号： E04C5/07 , E01C11/20 , E04C5/12
摘要： PURPOSE:To materialize complete rustproofness and demagnetization of anchorage parts at low cost in PC pavement employing FRP tendons. CONSTITUTION:Ends of FRP tendons 12 inserted through sheaths 11 buried in a concrete pavement board 10 are anchored temporarily with temporary anchors 13. Tension is applied to the tendons with a jack through couplers 24 and tension bars 25, and bondable setting-on-standing type grout is injected into the sheaths while the tension is kept up. After the strength is developed in the grout, the temporary anchors 13 are removed and projecting ends of the FRP tendons 12 are cut off.

5. 发明专利

JPH054886B2 失效
公开(公告)号：JPH054886B2
公开(公告)日：1993-01-21
申请号：JP21169686
申请日：1986-09-10
申请人： DE P KENSETSU KOGYO KK
发明人： SAKUTA SHINJI , MITSUKI NORICHIKA
IPC分类号： E04G9/00 , B28B13/06

6. 发明专利

JPH0390305A DEVICE TO INTRODUCE PRESTRESSING TO CONCRETE MEMBER IN CONTINUOUS FORM 失效
公开(公告)号：JPH0390305A
公开(公告)日：1991-04-16
申请号：JP22861989
申请日：1989-09-04
申请人： DE P KENSETSU KOGYO KK
发明人： TAKEDA SHUNJI , IGARASHI KAZUMA , OTSUKA NAGAO , SHIMIZU MAMORU
IPC分类号： B28B23/06
摘要： PURPOSE:To eliminate the fear of the violent fall of member or the like, suppress the abrupt application of vertical component force of steel material at the introduction of prestressing and consequently prevent crack and breakage from occurring by a method wherein beam keep members are provided through sliding members positioning on the upper edge face of the member at the positions corresponding to the bending part of PC steel stock and fixing rods, which fix the upper end of cushioning members arranged on the top surfaces of the beam keep members, are fixed to floor surface. CONSTITUTION:The bent part 12, which is bent downwards at the middle in the longitudinal direction of PC steel stock 11, is connected and fixed to fixing anchors, which are fixed to floor surface 23. After the steel stock 11 is tensed by traction, concrete is placed in a form. Sliding members such as rollers or the like are positioned on the upper edge face 13, which corresponds the bent part 12, of concrete member in continuous form 10, so as to arranged beam keep members 18 in the direction transversing the upper edge face 13. Further, cushioning members 20 such as springs or the like are positioned on the top surfaces of the beam keep members 18 so as to abut and fix their upper end against and to fixing rods 21, which are fixed to the floor surface 23. By releasing the fixing anchors so as to release the connection and fixation between the PC steel stock 11 and the floor surface 23 and the tensioning of the steel stock 11 by traction, the PC steel stock 11 contracts, resulting in allowing to introduce prestressing without giving abrupt deformation to the member 10.

7. 发明专利

JPH1161982A EARTHQUAKE RESISTANT REINFORCING STRUCTURE OF BUILDING 失效
公开(公告)号：JPH1161982A
公开(公告)日：1999-03-05
申请号：JP22821297
申请日：1997-08-25
申请人： DE P KENSETSU KOGYO KK
发明人： KURAMOCHI HARUO
IPC分类号： E04B1/16 , E04B1/58 , E04B2/56 , E04H9/02
摘要： PROBLEM TO BE SOLVED: To perform exchange of only a yield member after a yield role is achieved by a method wherein the yield member the relative sectional area of which is decreased and the proof stress of which is reduced is arranged at a part of a brace and removably joined therewith. SOLUTION: A pedestal 3 is contact-bonded and joined with the frame of a column and an beam by using a steel wire 4, a brace 5 is caused to span between the pedestals 3 and 3, and end parts 51 and 51 thereof are joined with the pedestal 3. In a so formed earthquake resistant auxiliary structure, a yield member 8 to effect a tensile yield prior to the body of the brace 5 is arranged at a part of the brace 5, and removably joined with the body of the brace 5. The yield member 8 is arranged, since exchange is facilitated, between an end part 51 joined with the pedestal of a brace 5 and an intermediate part 52 separated away from the end part 51. In a case of the brace being formed of an H-steel, the flange of an end part 51 overlapped with the flange plate of the pedestal 3 is notched, and the web of the end part 51 is welded to the flange web of the pedestal 3. This constitution performs exchange of only the yield member 8 after achievment of a role.

8. 发明专利

JPH09279858A EARTHQUAKE-RESISTANT REINFORCING STRUCTURE OF EXISTING BUILDING 失效
公开(公告)号：JPH09279858A
公开(公告)日：1997-10-28
申请号：JP9117096
申请日：1996-04-12
申请人： DE P KENSETSU KOGYO KK
发明人： KURAMOCHI HARUO
IPC分类号： E04B2/56 , E04G23/02 , E04H9/02
摘要： PROBLEM TO BE SOLVED: To decrease the number of operation, and to improve the efficient of the execution of works by contact-bonding and connecting pedestals for joining the end sections of braces to a building frame by using a PC steel material in a frame consisting of columns and beams in an existing building. SOLUTION: In a frame composed of columns 1 and beams 2 in an existing building, at least two pedestals 3, 3 are connected to the columns 1 or the beams 2 or the connecting sections of the columns and the beams PC steel material 4 along the frame, steel-framed brace 5 are built between the pedestals 3, 3, and the end sections of the braces 5 are united with the pedestals 3. Spaces between the pedestals 3 and the columns 1 or the beam 2 are filled with unthinkable joint mortar 6, inserting holes 31 are formed at the places of the arrangement of the PC steel materials 4 in the pedestals 3, and the pedestals 3 are contact-bonded and joined with a building frame by the pedestal 3 themselves and the PC steel materials 4 penetrated through the columns 1 or the beams 2. The braces 5 are connected to pedestals 3 by welding and bolt connection when the pedestals 3 are made of steel, and joined in a shape that the braces 5 are buried into the concrete of the pedestals 3 when the pedestals 3 are made of precast concrete.

9. 发明专利

JPH09273265A COMPRESSION MEMBER AND ITS MOUNTING STRUCTURE 失效
公开(公告)号：JPH09273265A
公开(公告)日：1997-10-21
申请号：JP8256896
申请日：1996-04-04
申请人： DE P KENSETSU KOGYO KK
发明人： TSUNODA YOSHIO , KURAMOCHI HARUO , OHIRA MASASHI
IPC分类号： E04B1/18 , E04B1/30 , E04C3/20
摘要： PROBLEM TO BE SOLVED: To raise compression strength gradually by arranging a plurality of confining members with different cross sectional shape and concrete in the multi-layered state with their axes coincided with each other, and by applying a compression force only on the concrete at the center. SOLUTION: A plurality of confining members 21 and 22 are arranged in the multi-layered state with their axes coincided with each other, and concrete 31 and 32 are filled inside to constitute a compression member 1. At both ends of the concrete 31, bearing plates 4 and 4 are provided for applying a pressure in the axial direction. A hinge member 11 is made as a yield hinge by holding a concrete 10 with the strength smaller than the concrete 31 between bearing plates 13 and 13 inside the plurality of confining members 12 and 12. One of the bearing plates 4 is brought into contact with the surface of a plate 6, while the other bearing plate 4 is kept in contact with the other bearing plate 13 of the hinge member 11 in contract with the plate 6. By this, after sliding occurred between the concrete 31 and the confining member 21, confinement is made by the concrete 32 and the confining member 22. Accordingly, a compression strength can be raised again after that.

10. 发明专利

JPH0941558A SHEARING REINFORCED STRUCTURE OF PRECAST CONCRETE BEAM MEMBER 失效
公开(公告)号：JPH0941558A
公开(公告)日：1997-02-10
申请号：JP19990795
申请日：1995-08-04
申请人： DE P KENSETSU KOGYO KK
发明人： NAKAI JUNICHI
IPC分类号： E04C3/20
摘要： PROBLEM TO BE SOLVED: To improve the arranging workability of reinforcements, by providing one continuous reinforcement rod composed of a part extending along the upper end of a beam member, a slant part against the beam axis, extending from the upper end of the support ends to the lower end, and a part extending along the lower end to arrange from the upper end to the lower end through the support ends. SOLUTION: A reinforcing rod 2 in this structure is made of a continuous rod composed of a part 21 parallel to the upper end, a slant part 22 against a beam axis, extending from the upper end of the support end 10 to the lower end thereof, and a part 23 parallel to the lower end. Since a diagonal tensile stress generated in the concrete is distributed to the direction from the center of member to the ends thereof and from the lower side to the upper side at the nearby position of the support ends 10, the reinforcements are arranged in this distributing direction and hence, the support ends are effectively reinforced. Since the end of the beam member is reinforced by one reinforcing rod 2, the beam dispenses with closed type shearing reinforcements in notched parts and hence, arrangement of reinforcements is simplified and the arranging workability of reinforcements is improved.

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