STEEL PIPE STIFFENING BRACE AND PRODUCTION METHOD THEREFOR

Title:

STEEL PIPE STIFFENING BRACE AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2012/060020

Kind Code:

A1

Abstract:

Provided is a brace production method that eliminates the need to bend flat steel and prevents steel pipe ruptures, and enables stiffening steel pipes capable of ensuring proper clearance to be formed. Also provided is a brace produced by this production method. A steel pipe stiffening brace (100) has a shaft (10) comprising a primary shaft (11) and secondary shaft (12), and a stiffening steel pipe (20) composed of four pieces of flat steel (21, 22, 23, 24) that enclose the shaft (10), the side edges of which are joined to each other. For the stiffening steel pipe (20), inside corner sections (25a, 26a), which face the side edge sections of the primary shaft (11), are formed on stiffening members (25, 26) having a right-angled (or an L-shaped) cross-section by fillet welds (W1), and outer corner sections (25b, 26b) are formed on the stiffening members (25, 26) by partial penetration welds (W2), and then the side edges of the stiffening members (25, 26) are brought into contact with each other, outer corner sections (27b, 28b) are temporarily assembled by partial penetration welds (W3), and partial penetration welds (W4 and W5) are made on the outer corner sections, 25b and 26b, and on the outer corner sections, 27b and 28b.

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Inventors:

UEKI TAKUYA (JP)
SHIMOKAWA HIROUMI (JP)
YAMAJI MUNETADA (JP)
FUNABA TAKU (JP)

Application Number:

PCT/JP2010/070158

Publication Date:

May 10, 2012

Filing Date:

November 05, 2010

Export Citation:

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Assignee:

JFE STEEL CORP (JP)
JFE ENG CORP (JP)
UEKI TAKUYA (JP)
SHIMOKAWA HIROUMI (JP)
YAMAJI MUNETADA (JP)
FUNABA TAKU (JP)

International Classes:

E04H9/02; E04B1/58

Foreign References:

JP2001132112A	2001-05-15
JP2001214541A	2001-08-10
JP2000226813A	2000-08-15
JP2008196108A	2008-08-28
JP2009022963A	2009-02-05
JP2003239393A	2003-08-27

Attorney, Agent or Firm:

OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)

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Claims:

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