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鋼構造論文集 Vol. 29 (2022), No. 116

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

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キーワードランキング

16 May. (Last 30 Days)

鋼構造論文集 Vol. 29 (2022), No. 116

摩擦ダンパーを配したブリムスラブ付き鉄骨置屋根体育館の地震応答性状の考察

朱 振華, 後藤 勝彦, 友清 衣利子, 山成 實

pp. 116_1-116_12

DOI:

10.11273/jssc.29.116_1

抄録

This paper investigated the effect of natural period ratio of RC frame to steel roof on seismic response of steel roof construction with brim-slab installed with friction dampers. A modeling of the school gymnasium was adequately carried out for a three-dimensional inelastic response analysis. The seismic responses of the gymnasia with different natural period ratios caused by the changes of steel roofs and brim-slabs were investigated. The damage to the frames of these models were analyzed and the dissipated energy ratio of the friction dampers to earthquake input energy were also shown in this paper. Finally, it was clarified that the natural period ratio was effective for the seismic design of such gymnasia.

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摩擦ダンパーを配したブリムスラブ付き鉄骨置屋根体育館の地震応答性状の考察

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外ダイアフラム形式柱梁接合部を有する鋼構造骨組の層剛性を確保するための設計手順の提案

藤根 和弘, 聲高 裕治, 森岡 宙光, 木下 智裕

pp. 116_13-116_28

DOI:

10.11273/jssc.29.116_13

抄録

We have developed a beam-to-column connection which has small projection exterior diaphragms using thicker steel plates than the conventional ones. This study aims to propose a rational design procedure for a steel moment-resisting frame (MRF) with exterior diaphragms. The design procedure focuses on the reduction rate of story stiffness of MRF with exterior diaphragms to that with rigid connections. The recommended optimum value of the reduction rate of story stiffness is proposed by static incremental analysis and time history response analysis.

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外ダイアフラム形式柱梁接合部を有する鋼構造骨組の層剛性を確保するための設計手順の提案

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鋼製堰堤の破壊形態に及ぼす接合部の押し込み変形影響解析

嶋川 理, 堀口 俊行, 別府 万寿博, 香月 智

pp. 116_29-116_39

DOI:

10.11273/jssc.29.116_29

抄録

This study estimates the collapse mechanism of an experiment that reproduces the destruction case of a steel open sabo dam using distinct element method (so called, DEM). In the experiment, a steel pipe open sabo dam was destroyed by a debris flow in Nagiso Town, and an steel pipe open sabo dam modeled in concerning with compressed deformation occurred is made of Barsa material. As a result, the compressed deformation occurred and the dam is damaged when the height of the preceding sedimentary gravel is 30 %. DEM analysis revealed that the axial force of the upper horizontal member increased in case of 30 % height of the preceding sedimentary gravels. Then the upper support diagonal member were broken due to bending force.

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鋼製堰堤の破壊形態に及ぼす接合部の押し込み変形影響解析

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鋼床版Uリブ切断工法における横リブ交差部補強構造に関する繰り返し載荷実験

申 啓航, 山口 隆司, 栗田 康弘, 松下 裕明, 奥村 学, 竹内 正一

pp. 116_41-116_54

DOI:

10.11273/jssc.29.116_41

抄録

As a reinforcing method for orthotropic steel decks, the U-rib cutting method has been proposed, in which the welding area between the U-rib and the deck plate is cut and reinforcing plate is installed. However, due to the U-rib cutting, the stress concentration may occur at the deck-transverse rib welds. In this study, two intersection structures were applied to the full-scale test model. Moreover, the static and cyclic loading test was carried out. As a result, in the case of the intersection structure with reinforcing plate on the transverse rib, cracks occurred at the deck-transverse rib welds. For the intersection structure without the plate on the transverse rib, stress concentration occurred at the deck-transverse rib welds, but no fatigue cracks occurred.

mendeley

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鋼床版Uリブ切断工法における横リブ交差部補強構造に関する繰り返し載荷実験

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実効変形増幅架構を適用した鋼構造制振建物における適用構面数と直交フレームが応答低減効果に及ぼす影響の検討

遠藤 慎也, 川崎 恵梨, 多賀 謙藏, 藤谷 秀雄

pp. 116_55-116_66

DOI:

10.11273/jssc.29.116_55

抄録

In recent years, in the design of high-rise steel-framed buildings in Japan, a passive controlled structure that adds dampers is often used to reduce the building response in the event of an earthquake. There is room for consideration as to finding an effective damper arrangement. The previous report proposed a more effective velocity-dependent damper arrangement method (frame systems that amplify the effective deformation). However, this study corresponds to the result of arranging the same dampers on all the structural surfaces of the framework in which the same plane frames are parallel. This study discussed the relation between the number of applied frame systems amplifying the effective deformation and the response reduction effect. Furthermore, the effect of orthogonal frames was examined.

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実効変形増幅架構を適用した鋼構造制振建物における適用構面数と直交フレームが応答低減効果に及ぼす影響の検討

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腐食を有する鋼矢板の曲げ耐力

大塚 貴弘, 松田 和浩, 大高 範寛

pp. 116_67-116_76

DOI:

10.11273/jssc.29.116_67

抄録

This paper investigated about the ultimate bending moment for corroded steel sheet pile. At first, we examined the corrosion shape of constructed steel sheet pile, and we idealized the corrosion shape based on these results. Secondly, we performed experiments and numerical analysis for steel sheet piles with partial plate thickness decrease. Finally, we propose the ultimate bending moment for corroded steel sheet pile.

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腐食を有する鋼矢板の曲げ耐力

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