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Kou kouzou rombunshuu Vol. 19 (2012), No. 74

ISIJ International
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ONLINE ISSN: 1884-0329
PRINT ISSN: 1880-9928
Publisher: Japanese Society of Steel Construction

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Kou kouzou rombunshuu Vol. 19 (2012), No. 74

COMPUTER-AIDED DESIGN SYSTEM OF STEEL SUB-BEAMS WITH NEW CONCEPT FOR EDUCATION

Kouichi HARADA, Asami SAWAHARA, Minoru YAMANARI

pp. 74_1-74_10

DOI:

10.11273/jssc.19.74_1

Abstract

This paper is concerned with a computer-aided design system for education in steel structural design. Beginners in the structural design field have to study hard and take the long term to retrieve their skill of design. It is said that their effort should take a few years to achieve it. However, Japan is going through the age of declining birthrate and a growing proportion of elderly people. The new system presented here takes structural design of steel sub-beams supporting concrete slab to demonstrate the concept of multi-acquisition of solutions.

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COMPUTER-AIDED DESIGN SYSTEM OF STEEL SUB-BEAMS WITH NEW CONCEPT FOR EDUCATION

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Ris

SLIP BEHAVIOR OF HYBRID JOINTS BY TIGHTENING BOLTS BEFORE WELDING

Kuniaki MINAMI, Masamichi SAITO, Hideki YOKOYAMA, Mitsuru ICHIMIYA, Takao NOJIMA, Atsushi SHIBUYA

pp. 74_11-74_18

DOI:

10.11273/jssc.19.74_11

Abstract

At hybrid joints of steel girders using bolted and welded joints, it is necessary to implement erection pieces as restrainers of welded joints and to remove them after welding. To enable the connection without the erection pieces, we proposed a new connection method of hybrid joints, in which we use the bolted connections of longitudinal ribs as the restrainers by tightening the bolts before welding. To establish a procedure of the method, we carried out trial execution tests of hybrid joints. As a result, it was clarified that the bolted joints slipped at the time of untightening the bolts, while they did not slip at the welding stage. After the slip, the damage of the friction surfaces was localized to small regions around the remaining bolts.

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SLIP BEHAVIOR OF HYBRID JOINTS BY TIGHTENING BOLTS BEFORE WELDING

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