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鋼構造論文集 Vol. 10 (2003), No. 38

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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鋼構造論文集 Vol. 10 (2003), No. 38

現場接合形式柱梁溶接接合部の力学性状に関する研究

甲津 功夫, 中田 智三

pp. 1-15

DOI:

10.11273/jssc1994.10.38_1

抄録

In order to prevent premature failure of single bevel full penetration welded joint in site welding type steel beam-to-column connection, due to welding defect, single V groove welding for beam flange-through diaphragm welded joint is proposed. An experimental investigation was caned out to clarify seismic performance of the connection designed for ease of fabrication practice. The root opening and the material of welding wire were selected as the experimental parameters, while the groove angle was kept constant at 40 degree. From the experiment, the most suitable combination of the root opening and the material of welding wire has been decided, to insure sufficient ductility of the connection.

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現場接合形式柱梁溶接接合部の力学性状に関する研究

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「始終端部に欠陥を有する突合せ溶接部の脆性的破壊に関する実験的研究」

嶋 徹, 濱田 弘行, 西川 耕二, 鈴木 眞一, 石原 完爾, 原田 幸博, 鄭 聖眠, 森田 耕次

pp. 17-29

DOI:

10.11273/jssc1994.10.38_17

抄録

Tensile tests were carried out on the welded butt joints with artificial through thickness defects to investigate brittle fracture behavior from the defects. In most specimens, a ductile crack propagated slightly from the bottom of the defect and then brittle crack initiated at the tip of the ductile crack. Brittle crack propagated from the weld bond into the heat-affected zone and then base metal of the stress continuity plate. The changes in the weld defect size significantly affected the welded joints performance experimentally, and the fracture strength of the welded joints was discussed by the fracture analysis.

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「始終端部に欠陥を有する突合せ溶接部の脆性的破壊に関する実験的研究」

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特殊高強度ボルトを用いた角形鋼管柱・H形梁接合部の力学的性状に関する研究

藤井 俊二, 増田 浩志, 田中 淳夫

pp. 31-38

DOI:

10.11273/jssc1994.10.38_31

抄録

In this experimental study, the statical characteristics of WF beam-to-SHS column connections using special shaped high strength bolts called "Paddle Bolt" was investigated. The cyclic bending test was carried out with the specimen shaped "T". The specimens were two kinds of combination of beam and column. Three kinds of the reinforcing plates were used at the column skinplate. Also the shape of Paddle Bolt is a little changed in order to avoid the additional bending moment due to shear force. The effect of reinforcing plates at the bolted parts of this beam-to-column connection becomes clear by this test.

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特殊高強度ボルトを用いた角形鋼管柱・H形梁接合部の力学的性状に関する研究

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超高強度ボルトの鋼桁橋への適用性に関する検討

亀井 義典, 石川 誠, 西村 宣男, 桐生 真司, 竹内 修治

pp. 39-49

DOI:

10.11273/jssc1994.10.38_39

抄録

Recently, high tension bolt of Fl5T class (SHTB : Super High Tension Bolt) that it got over delayed fracture was developed. There has already been an example that SHTB is being used for in the building field. The bolted joint of the very thick member and the high strength material becomes possible by using SHTB practically. As a result, using SHTB can reduce the number of bolts. In this study, it is analyzed about a fundamental problem to use SHTB. Furthermore, it is evaluated about the economic effect by applying SHTB to the steel girder bridges by trial design.

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単層トラス架構の接合継手簡略化に関する研究

黒岩 義彦, 木村 祥裕, 正岡 典夫, 小河 利行, 加藤 史郎

pp. 51-60

DOI:

10.11273/jssc1994.10.38_51

抄録

The paper is intended as a study on simplification of joins of single-layer trusses composed of twisted H-shaped steel members. This kind of strucuture adopts friction type H.T.B. and such connections can possibly be simplified by omitting the flange or web splice plates because the major stress in the truss is axial one. However, the existence of the bending moments and the shear forces in real structures requires the correct evaluation of the mechanism of stress transferring. To do this, a number of connections of different types are tested under shearbending loads and the experimental results are analyzed. Also, the buckling tests are carried out regarding twisted Hshaped steel members with different connection types at the ends. This test elucidates the influences of the connection types on the buckling strength, which can also be estimated by adopting the potential energy method, considering the rotational rigidity of the connection.

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単層トラス架構の接合継手簡略化に関する研究

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CFRP板接着補強において被着体厚さが補強効果に与える影響に関する実験的研究

野阪 克義, 金子 大昨, 古川 喬朗, 鈴川 研二, 西出 靖

pp. 61-68

DOI:

10.11273/jssc1994.10.38_61

抄録

The strengthening method with bonding Carbon Fiber Reinforced Polymer (CFRP) strips has been merely applied to steel structures despite of many applications on concrete structures. In order to obtain useful information for application of bonded CFRP strips on steel structures, tensile tests on steel plates strengthened with CFRP strips were conducted. In the current study, the influence of the thickness of adherends and the number of layers of CFRP strips was investigated. The test results indicated that the reduction of tensile strain at the neutral axis in the steel plate can be estimated by a simple equation although a moment was existed in the specimen due to the CFRP strips bonded only on one side of the steel

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外部環境の変化がインテグラル複合ラーメン橋の挙動に及ぼす影響に関する検討

高木 優任, 横山 功一, 原田 隆郎

pp. 69-79

DOI:

10.11273/jssc1994.10.38_69

抄録

In this research, in order to investigate the response behavior of the integral bridge due to temperature change, the environment and temperature on each part of a bridge were measured for an actual bridge. Moreover, in order to simulate the response behavior of the bridge, heat transfer analysis and heat stress analysis were carried out. Consequently, it is confirmed that the analytical value shows good agreement with the measured value, and it was made clear that the bridge response by temperature change could be reproduced by the analysis.

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外部環境の変化がインテグラル複合ラーメン橋の挙動に及ぼす影響に関する検討

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振動による変位とその頻度を計測する簡易な計測器の開発

山田 聡, 山田 健太郎, 小塩 達也

pp. 81-89

DOI:

10.11273/jssc1994.10.38_81

抄録

A simple and handy system to measure vibration-induced displacement is developed. It consists of three accelerometers, a processor and dry battery and stored in a small watertight box. Measured acceleration is transformed into displacement. If relationship between displacement and stress at point of interest is known, one can also obtain stress range histogram to be used for fatigue assessment of the structures. The system works for four weeks with dry battery and is suitable to measure long term displacement and stress range histograms. Calibration and laboratory tests of the system, where the system is attached full-scale overhead sign structure, is carried out.

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振動による変位とその頻度を計測する簡易な計測器の開発

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許容応力度等計算に準拠して設計された履歴型ダンパー付鋼構造骨組の地震応答

加村 久哉, 河村 昌俊, 小川 厚治, 井上 一朗

pp. 91-104

DOI:

10.11273/jssc1994.10.38_91

抄録

This paper presents seismic performance of moment resistant frames with hysteretic dampers designed with allowable stress design method according to the building standard law of Japan. In this paper, moment resistant frames (4, 8, 12-story) with and without hysteretic dampers (the buckling-restrained braces) are designed in order to compare with their seismic responses. The difference of seismic responses of the two kinds of frames is investigated on maximum story drift angle, damage of beams and cumulative ductility factor of hysteretic dampers by numerical analysis with both conventional frame and fishbone-shaped frame model.

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許容応力度等計算に準拠して設計された履歴型ダンパー付鋼構造骨組の地震応答

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大スパンアーチトラス構造の弾塑性地震挙動及び座屈拘束部材を用いた場合の応答性状に関する研究

加藤 史郎, 高 〓, 植木 隆司

pp. 105-118

DOI:

10.11273/jssc1994.10.38_105

抄録

In this paper, firstly, we investigate the seismic behavior of a typical steel truss arch, and have found that it may suffer a risk of collapse. Then for the retrofit of existing large span truss structures, a passive seismic control system using Buckling-Restrained Members, abbreviated as BRM, is suggested to enhance the earthquake resistant capacity. Through the elasto-plastic earthquake response analyses, the effect of BRM on reducing the structural seismic responses is confirmed. Finally, based on the result of parametric study, the design base-shear coefficient for BRM and the proper location for incorporating BRM are proposed for this kind of steel truss arch.

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大スパンアーチトラス構造の弾塑性地震挙動及び座屈拘束部材を用いた場合の応答性状に関する研究

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孔明鋼板を剛結部に用いた上下部一体構造の力学的特性

岩崎 初美, 西土 隆幸

pp. 119-128

DOI:

10.11273/jssc1994.10.38_119

抄録

The authors have proposed hybrid structures that can transmit the stress from steel girders to concrete piers without bearings. The structures consist of steel pipes and perfobond rib shear connectors. The concrete piers are put into the steel pipes. The authors carried out experiments in mechanical characteristics on three kinds of the structures with cyclic loading tests, Type 1 (the steel pipe with a plate at its top), Type 2 (the steel pipe with the plate at its top and the shear connectors) and Type 3 (the steel pipe and the shear connectors). As the results of the experiments, there are the following mechanical characteristics in the structures; adhesion stage between the steel pipes and the concrete piers, shear stage between the connecters and the concrete piers, and yield stage on steel bars in the piers. Type 2 and Type 3 have enough strength and ductility.

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孔明鋼板を剛結部に用いた上下部一体構造の力学的特性

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