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鋼構造論文集 Vol. 31 (2024), No. 122

ISIJ International
belloff
オンライン版ISSN: 1884-0329
冊子版ISSN: 1880-9928
発行機関: Japanese Society of Steel Construction

Backnumber

  1. Vol. 31 (2024)

    1. No.124
    2. No.123
    3. No.122
    4. No.121

  2. Vol. 30 (2023)

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  31. Vol. 1 (1994)

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    2. No.3
    3. No.2
    4. No.1

キーワードランキング

30 Jan. (Last 30 Days)

鋼構造論文集 Vol. 31 (2024), No. 122

加熱冷却を受けた橋梁用高降伏点鋼板の機械的性質推定における硬さ試験の適用性

松原 幸輝, 廣畑 幹人, 浜田 文斗

pp. 122_1-122_15

DOI:

10.11273/jssc.31.122_1

抄録

A series of investigations were conducted to clarify the change in mechanical properties of SBHS subjected to heating and cooling assuming fire, and to examine whether the change can be estimated by hardness tests. When SBHS was heated above 600 ℃ and then cooled, the material strength decreased due to recrystallization and transformation. A clear correspondence was observed between the mechanical properties of SBHS subjected to heating and cooling and the Leeb and Vickers hardnesses. The yield stress and tensile strength could be estimated by the hardness tests with an error of approximately 5 % from the tensile test results.

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加熱冷却を受けた橋梁用高降伏点鋼板の機械的性質推定における硬さ試験の適用性

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Bibtex

Ris

溶接ロボットによる冷間プレス成形角形鋼管柱端溶接部の溶接施工条件と機械的性質の関係

中川 治彦, 中野 達也, 浅田 勇人, 高田 篤人, 長久 靖典, 西澤 淳, 水本 学, 安田 享平

pp. 122_16-122_28

DOI:

10.11273/jssc.31.122_16

抄録

In this study, the mechanical properties of the weld metal applied to the joints between the cold press formed steel tube and the through diaphragm were investigated by the welding test and the heat conduction analysis. The parameters of the welding test were the welding conditions such as the heat input, the type and shape of weld joint. The characteristic point was that the maximum heat input was set to 60 kJ/cm which was the upper limit for the welding robot as opposed to normal 30 kJ/cm. From the test and analysis results, it was clarified that the welding conditions affected the inter-pass temperature and the cooling time of weld metal. There was a correlation that the strength of weld metal increased with the increase the cooling speed.

mendeley

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溶接ロボットによる冷間プレス成形角形鋼管柱端溶接部の溶接施工条件と機械的性質の関係

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Bibtex

Ris

鋳鉄床版パネル高力ボルト摩擦・引張併用接合の要素引張載荷実験

山下 良, 李 若曦, 山口 隆司, 白井 悠吾

pp. 122_29-122_42

DOI:

10.11273/jssc.31.122_29

抄録

The cast iron deck is a lightweight deck slab with excellent fatigue resistance. There is a problem that the deck is separated when negative bending acts on the joint. As a countermeasure, we proposed a structure that uses both friction joint by the splice plate to the upper surface of the deck and tension type joint of end ribs. In this study, we confirmed the behavior of this joint structure up to the final stage and clarified the limit state by the elemental experiment.

mendeley

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鋳鉄床版パネル高力ボルト摩擦・引張併用接合の要素引張載荷実験

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