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鋼構造論文集 Vol. 20 (2013), No. 80

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

15 May. (Last 30 Days)

鋼構造論文集 Vol. 20 (2013), No. 80

耐火パネルを取付けた合成桁の加熱実験

柳澤 則文, 長谷 亮介, 大山 理, 栗田 章光

pp. 80_1-80_10

DOI:

10.11273/jssc.20.80_1

抄録

In order to protect a bridge against the fire attack mainly due to the turning over accident of a tank lorry vehicle, a Fire Protection Panel has been developed by the authors, because in a last decade it can see some serious damaged examples of viaduct and bridge by fire accident in USA, Germany, Japan and so on. Some of those bridges had fall down by fire attack and self-weight of bridge. The authors carried out the fire test and a numerical analysis of steel-concrete composite girder assembling Fire Protection Panel. This paper reports on the outline of the Fire Protection Panel and the experimental results of the temperature distributions in the steel girder compared with the analytical ones.

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耐火パネルを取付けた合成桁の加熱実験

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既存鉄骨造におけるH形鋼柱・梁仕口の力学的挙動

辻岡 静雄

pp. 80_11-80_17

DOI:

10.11273/jssc.20.80_11

抄録

This study is planed to clarify the seismic performance for existing steel structure using rolled-H section members. The cyclic loading tests with increasing amplitude were conducted on five welded beam-column subassemblages having a T-shape. The test parameters were the type of the column members and the beam-to-column connections. From the results of these tests, the hysteresis characteristics, the skeleton curve, the rotation rigidity, the yield strength and the ultimate strength are clarified. The vertical triangular haunch plates have great influence on the yield strength and the failure mode.

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既存鉄骨造におけるH形鋼柱・梁仕口の力学的挙動

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ウェブを軸方向スチフナで補強したH形鋼梁の塑性変形能力

星川 努, 原田 幸博

pp. 80_19-80_32

DOI:

10.11273/jssc.20.80_19

抄録

The purpose of the present study is to investigate how longitudinal stiffener plates can improve plastic deformation capacity of the H-section steel beams with a thinner web. Efficiency of the retrofit can be quantitatively estimated by an accumulated plastic deformation obtained from cyclic loading tests and numerical simulation. The quantitative estimate method of prevention effect of local buckling by the theory of elastic buckling of plates is proposed. The design procedure of stiffeners by prediction formula of plastic deformation capacity and increasing rate in strength is proposed.

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ウェブを軸方向スチフナで補強したH形鋼梁の塑性変形能力

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柱にSTKR材を用いた既存不適格鋼構造骨組の補強設計法（根巻き補強）

聲高 裕治, 長谷川 隆

pp. 80_33-80_45

DOI:

10.11273/jssc.20.80_33

抄録

In 2007, the building standard law of Japan was revised and a specification of column overdesign factor (COF) was added in case of square tube columns. These researches deal with existing non-conformed steel buildings using STKR columns according to being not satisfied with the specification of COF. In this paper, in order to enhance the full-plastic moment of column, reinforcement wrapping mortar around column base is proposed. An experimental verification of reinforced column was conducted to investigate mechanical behavior and confirm the validity of reinforcement design method. As a result, specifications for providing required bending moment to column were clarified.

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柱にSTKR材を用いた既存不適格鋼構造骨組の補強設計法（根巻き補強）

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単層円筒ラチスシェル構造への免震デバイス適用に関する研究

笹原 健嗣, 松本 幸大

pp. 80_47-80_55

DOI:

10.11273/jssc.20.80_47

抄録

In this paper the earthquake response behavior of single layer latticed cylindrical shell roofs constituted with steel members has been numerically analyzed. Also, the applicability of mid-story seismic isolation system has been discussed. The input waves are of the artificial earthquake waves having the various phase characteristics and target spectra. The various response quantities and the effects of seismic isolation have been investigated in detail. Furthermore, a concept of application method for seismic-isolated single layer latticed cylindrical shell structures has also been suggested.

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単層円筒ラチスシェル構造への免震デバイス適用に関する研究

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厚肉箱形断面部材を用いたノンダイアフラム形式柱梁接合部の弾塑性挙動

椎葉 弘明, 聲高 裕治, 佐藤 由悟

pp. 80_57-80_72

DOI:

10.11273/jssc.20.80_57

抄録

In case of non-diaphragm type beam-to-column connection, out-of-plane deformation of column flange occurs and has some effect on overall behavior of steel frame. This paper investigates mechanical behavior of non-diaphragm type beam-to-column connection using thick square hollow section by means of full-scale loading test and finite element method analysis. As a result, it is clarified that distribution of shear force at panel zone of non-diaphragm type is differnt from that of through-diaphragm type, and strength of the non-diaphragm panel decreases and elastic stiffness increases.

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厚肉箱形断面部材を用いたノンダイアフラム形式柱梁接合部の弾塑性挙動

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予すべりが生じた高力ボルト摩擦接合継手のすべり耐力に関する実験的検討

一宮 充, 森 猛, 田坂 康介, 藤野 大地

pp. 80_73-80_81

DOI:

10.11273/jssc.20.80_73

抄録

Slip coefficients of high strength bolted connections with pre-slide contact surfaces are important issue to be considered when combined connections of welded joints and bolted joints are used for the connections in I-section girders. In this paper, the slip coefficients of bolted joints，which slid on the condition of bolts being tightened up to 60％ of design level and then the bolts were tightened up to the deign level are discussed through a series of experiments in which the direction and the amount of pre-slide are set as the parameters. The test results suggest that the slip coefficient ofjoints with pre-slide contact surfaces is lower than that of the bolted connections without pre-slide surfaces，but the differences are about 20％ at most.

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予すべりが生じた高力ボルト摩擦接合継手のすべり耐力に関する実験的検討

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