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鋼構造論文集 Vol. 5 (1998), No. 19

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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  31. Vol. 1 (1994)

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鋼構造論文集 Vol. 5 (1998), No. 19

高層鋼構造建築物の構造部材及び接合部に関する調査研究

銭 鋼, 増田 浩志, 田中 淳夫

pp. 1-8

DOI:

10.11273/jssc1994.5.19_1

抄録

In this paper the results of a research about the structural members, those connections and structural characteristics of 50 existing high rise steel buildings are summarized. The bights of those buildings are between 45m to 60m. Most of those buildings are office buildings. 80 % of the beam-to-column connections are designed as WBFW(web bolted and flange welded) type connections. 96 % of the designed ultimate bending strength of the beam-to-column connections are larger than 1.265(=1.1x1.15) times of the full plastic moment of the connected beams. The ratio of the yield strength of panel zone to the plastic bending strength of connected members and the ratio of the plastic bending strength of columns to that of beams are also investigated.

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高層鋼構造建築物の構造部材及び接合部に関する調査研究

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鉄道混合構造物の接合部の耐荷力評価

村田 清満, 安原 真人, 木下 雅敬, 葛 拓造

pp. 9-20

DOI:

10.11273/jssc1994.5.19_9

抄録

At present, Concrete filled steel Tubular columns, called CFT columns, draw attention as a structural member of high seismic resistibility. While the application of CFT columns to the pier or pile increases, many studies focusing mainly on CFT column bodies are carried out. On the other hand, when CFT columns are used as a structural member of railway mixed structure, CFT column may not demonstrate a high seismic performance without an adequate bearing capacity of joint panels. In this paper, studying the bearing mechanism based on a series of tests of joint panels where CFT columns are directly embedded into the concrete footing and on a series of tests of RC or SRC beam-to-CFT column joint panels, the evaluation of the bearing capacity for these joint panels is worked out with simple models.

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鉄道混合構造物の接合部の耐荷力評価

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腐食環境における鋼材の疲労の実験的研究

阿部 英彦, 諸橋 知行

pp. 21-27

DOI:

10.11273/jssc1994.5.19_21

抄録

Many bridges are constructed near sea shore and across straits in Japan. The fatigue problem under salty environment should be considered as one of the most important issues for maintenance of steel bridges. The objective of the present paper is to clarify the characteristics of fatigue of steel members under the salty environment. The crack propagation in the steelspecimens is measured through a magnifier. The influences of factors, such as the environment and the cyclic speed of loading on the crack growth rate are investigated. Using Paris' Equation, the fatigue life of butt-welded pieces with undercuts under salty environment is predicted, based on our test results using specimens of plates with holes.

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腐食環境における鋼材の疲労の実験的研究

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阪神・淡路大地震で被災した鋼製円柱橋脚の破壊靱性

大倉 一郎, 田原 潤, 安田 修, 広野 正彦

pp. 29-37

DOI:

10.11273/jssc1994.5.19_29

抄録

The purpose of this study is to give the cause of cracking at the middle part of steel piers with a circular cross section damaged by the 1995 Kobe Earthquake. We investigate the residual strains, hardness and Charpy absorbed energy of the steel plate with a local buckling deformation in the pier that was hit by the Earthquake. The synthetic consideration for the obtained results and the features of the fracture toughness of the steel plates at the period when the piers were fabricated, concludes that it would be one of the causes of cracking that the fracture toughness in the pier direction was originally small.

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阪神・淡路大地震で被災した鋼製円柱橋脚の破壊靱性

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増厚補強箱形断面柱一H形断面梁接合部の構造性能に関する研究

森田 耕次, 藤田 謙一, 横井 圭司, 古沢 恵三

pp. 39-53

DOI:

10.11273/jssc1994.5.19_39

抄録

The structural behaviors of beam-and-column subassemblage reinforced by increasing column thickness at the connection area without inner diaphragms in addition to the horizontal haunch of beam at the connection side are investigated by the cyclic reversal loading test and finite element analysis. The case studies are presented to discuss the structural performance of beam-to-column connection by using finite element analysis and yield line theory with respect to two types of connection: (1) the beam-to-column connection reinforced by increasing the column thickness at the connection area, and (2) the beam-to-column connection reinforced by increasing the column thickness at the connection area with the horizontal haunch of beam at the connection side.

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増厚補強箱形断面柱一H形断面梁接合部の構造性能に関する研究

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りん酸塩処理を摩擦接合面処理に適用する場合の実施工上の問題点の検討

小端 高行, 佐藤 正康

pp. 55-64

DOI:

10.11273/jssc1994.5.19_55

抄録

The previous reported that a high coefficient of friction could be obtained by applying phosphate treatment to zinc galvanized coatings. However, it cannot be said that practicability and quality problems in actually practicing the method have been fully examined and cleared. Therefore, in this study, problems in possible processes to be taken and in quality were further investigated. The results showed that the phosphate treatment was a puctical and highly reliable process and thus its practical use could be concluded to be no problem.

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りん酸塩処理を摩擦接合面処理に適用する場合の実施工上の問題点の検討

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中低層鋼構造骨組の耐震性能その1調査骨組の概要と構造部材

増田 浩志, 田中 淳夫, 秋田 智, 前田 憲太郎

pp. 65-72

DOI:

10.11273/jssc1994.5.19_65

抄録

In this paper the result of a research about the structural members, those connections and structural characteristics of 92 existing low and middle rise steel buildings are summarized. The structure of all those buildings are designed as pure moment resisting frames. All beam-to-column connections are designed as shop welding type rigid connections. Most of the designed ultimate bending strength of the beam joints are larger than 1.2 times of the full plastic moment of the connected beams. The ratio of the yield strength of panel zone to the plastic bending strength of connected members and the ratio of the plastic bending strength of columns to that of beams are also investigated.

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中低層鋼構造骨組の耐震性能その1調査骨組の概要と構造部材

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3径間2ヒンジ吊橋全体系の鉛直荷重に対する終局強度に関するパラメトリックスタディー

中村 俊一, 大神 勝城

pp. 73-83

DOI:

10.11273/jssc1994.5.19_73

抄録

Elasto-plastic large deflection FEM analysis is carried out to investigate the ultimate strength and failure mode of two-hinge three-span suspension bridges consisting of cables, hangers, stiffened girders and towers with different combination of member safety factors. In many cases elastic buckling of tower occurs and leads to the collapse of the whole bridge system, accompanied by plasticity of hangers or cables at the ultimate stage in some cases, but a plastic hinge forms in the middle of tower and collapses the whole bridge system when residual stresses are introduced in the tower section. It is found from this parametric study that the safety factor of cables more significantly affects the ultimate strength of the system than other members.

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3径間2ヒンジ吊橋全体系の鉛直荷重に対する終局強度に関するパラメトリックスタディー

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鋼管柱の耐震補強構造に関する数値シミュレーション

安波 博道, 寺田 昌弘, 名取 暢, 村越 潤

pp. 85-96

DOI:

10.11273/jssc1994.5.19_85

抄録

Regarding the seismic retrofit of a steel pipe column by attaching an outer pipe with clearance at the portion where local buckling occurs, we investigated the effects of various factors of the outer pipe (clearance between outer pipe and steel pipe, wall thickness and mechanical properties of outer pipe) on the ductility of the steel pipe column, by conducting an elasto-plastic FEM analysis using shell elements as parameters, in a test similar to that which reproduces quasi-static cyclic load on a cantilever model test specimen. And using the analysis results thus obtained, we proposed the guide specifications for structural reinforcement to attain necessary ductility and a formula for estimating the ductility ratio of the reinforced steel pipe column with various types of outer pipe.

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鋼管柱の耐震補強構造に関する数値シミュレーション

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柱RC梁Sで構成される柱梁接合部のせん断耐力

宮野 洋一

pp. 97-105

DOI:

10.11273/jssc1994.5.19_97

抄録

Recently, mixed structure composed of reinforced concrete columns and steel beams have been used in the construction of buildings. A great number of reseach papers according to the beam-column joints also have been published for these few years. However, the stress transfer mechanism in the beam-column joints has not been clarified yet, especially in the type of through column type of joint. In this paper, a method to determine the shear force ratio between concrete part and steel part of the joint is proposed in the through column type joint based on the test results and stress transfer mechanism.

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柱RC梁Sで構成される柱梁接合部のせん断耐力

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ハイブリッド/混合有限要素法によるラップ接着された円筒体の応力解析

段 梅, 宮本 裕, 岩崎 正二, 出戸 秀明

pp. 107-116

DOI:

10.11273/jssc1994.5.19_107

抄録

Hybrid/mixed finite element method (HMFEM) of 4-node and 8-node quadrilateral element and displacement finite element method (DFEM) of 6-node triangle element are presented for the axial symmetry problem of three dimension and are applied to make some stress analyses for adhesis -bonded cylindrical lap joints. Numerical computations show HMFEM gives more satisfactory conclusion than DFEM.

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ハイブリッド/混合有限要素法によるラップ接着された円筒体の応力解析

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履歴ダンパーの信頼性と維持・管理に関する研究

森 保宏

pp. 117-129

DOI:

10.11273/jssc1994.5.19_117

抄録

A hysteretic damper must be ductile enough to consume the energy of repeated earth quakes and to mitigate damage on columns and beams. This paper describes a simple method to evaluate the cumulative ductility response factor and presents a statistics of the response factor using numerical examples. The failure probability of a hysteretic damper is also presented taking the deterioration of the damper due to repeated loading into account. The reliability of a hysteretic damper depends on the structural characteristics and the capacity of the damper and the replacement of the damper may have to be considered depending on the combination.

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履歴ダンパーの信頼性と維持・管理に関する研究

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