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    • 4. 发明专利
    • PACKED STEEL PIPE CONCRETE STRUCTURE COLUMN
    • JPH10204995A
    • 1998-08-04
    • JP1161997
    • 1997-01-24
    • TAISEI CORP
    • SUGITA KAZUNAONISHIGAKI TARO
    • E04B1/30E04C3/32E04C3/34
    • PROBLEM TO BE SOLVED: To support loads well in a fire so as to reduce or eliminate a fire resistant cover by providing a diaphragm arranged at each junctions of joists with threaded reinforcing bars extending along the direction of the axis of a steel-pipe concrete structure column, the diaphragm being placed at each beam junction. SOLUTION: A plurality of threaded reinforcing bars 4 are arranged vertically and secured to a diaphragm 7 by nuts 9. The threaded reinforcing bars 4 are connected together by couplers 10 and are arranged continuously along the direction of the axis of a steel pipe 2. In each of diaphragms 7 placed at two of upper and lower places at each junction 6, four through holes 8 are formed. Concrete 3 is placed and packed ion the steel pipe 3 to construct a concrete structure column 1. No threaded reinforcing bars 4 may be placed between the diaphragm 7 above the junction 6 and the diaphragm 7 below the junction 6. Thus even in the event of a fire while no fire resistant cover exists, cracking and the width of a crack can be reduced. Therefore, either the fire resistant cover can be reduced or no fire resistant cover is required.
    • 10. 发明专利
    • Method of designing composite beam
    • JP2004278080A
    • 2004-10-07
    • JP2003069417
    • 2003-03-14
    • Taisei Corp大成建設株式会社
    • NISHIGAKI TAROMICHIKOSHI SHINTAROU
    • E04B1/94E04B1/00E04B1/30E04B5/32
    • PROBLEM TO BE SOLVED: To provide a method of designing a composite beam optimizing the amount of steel to reduce the weight of the composite beam while securing structural stability in case of a fire of the composite beam even when omitting or reducing fire resistive covering for a steel beam.
      SOLUTION: The method of designing the composite beam has a first step for setting items of each member constituting the composite beam; a second step for obtaining the temperature of each member in case of the fire by analysis; a third step for leading out the shearing strength of a stud in case of the fire using the analyzed result of the second step; a fourth step for determining the integrity of a concrete slab and the steel beam by comparing the shearing strength of the stud led out in the third step, with steel stregnth in case of the fire, to lead out ultimate flexural strength at the high temperature of the composite beam according to the determined result; and a fifth step for verifying structural stability in case of the fire of the composite beam using the ultimate flexural strength at the high temperature led out in the fourth step.
      COPYRIGHT: (C)2005,JPO&NCIPI