古川 幸 (フルカワ サチ)

FURUKAWA Sachi

写真a

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職名

講師

研究室所在地

杉本キャンパス

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  • 京都大学 -  博士(工学)

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建築構造工学

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免震構造, 杭頭接合部, 柱脚接合部, 鋼構造

所属学協会 【 表示 / 非表示

  • 日本建築学会

  • 日本鋼構造協会

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  • 一般社団法人日本鋼構造協会 鋼構造シンポジウム 優秀発表賞

    2014年11月  

  • 日本建築学会近畿支部研究発表会 優秀発表賞

    2009年06月  

現在の職務 【 表示 / 非表示

  • 大阪市立大学   工学研究科   都市系専攻   講師  

 

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  • 定着鉄筋を溶接したアンカーボルトセットを用いた層中間ピン柱脚接合部の水平力作用時の応力伝達機構と終局せん断耐力評価

    古川 幸, 高橋 邦広, 渡辺 亨, 染谷 俊章, 金田 勝徳, 木村 祥裕, 和田 章

    日本建築学会 日本建築学会構造系論文集  86 ( 786 ) 1247 - 1258 2021年08月  [査読有り]

     概要を見る

    <p> Mid-story pin column system has been proposed to realize beam yielding mechanism of a steel moment-resisting frame. In this system, a pin connection system is applied inbetween the upper steel column and the lower RC column extended from the base beam to control moment demands on both ends of the first story column. An exposed-type column base has been adopted as a pin connection connected by a single anchor bolt. Static cyclic horizontal loading tests of a partial frame consisting of the first story column and the second floor beams showed a frame with the proposed column base system exhibited stable hysteresis performance up to a story drift angle of 0.05 rad, remaining column in elastic. In addition, the RC column with the connection of a single anchor bolt exhibited slippage at the connection while this problem was solved when an anchor bolt was stiffened by cross-shaped four shear plates. A cover plate was also welded on the top of the shear plates to cover the top surface of the RC column from bearing pressure of the upper steel column. An anchor bolt with the welded plates are called an anchor bolt set, or ABS, hereinafter. Ensuring a reliable seismic performance of an upper steel frame, damages at the proposed connection have to be minimized. So far, compressive stress transfer mechanism was clarified, and the ultimate compressive strength of the connection was evaluated in the previous study. </p><p> This paper discusses shear stress transfer mechanism and the ultimate shear strength of the RC column with proposed column base connection with the ABS. An anchorage rebar was welded on each shear plates to anchor the ABS to the RC column until the connection reaches the ultimate strength. Series of static cycle horizontal loading tests were conducted. Test parameters are a diameter of anchorage rebars and stirrup arrangement. Test results showed that anchorage rebars increased the shear strength twice as large as the connection by ABS without anchorage rebars, mitigating bearing crack propagation spread from the ABS (Chapter 2). </p><p> Chapter 3 shows that Navier hypothesis is applicable to strain distribution of a group of anchorage rebars, and that their neutral axis can be estimated as the gravity center of the semicircle of the cover plate under uniform pressure. A formulation of the yielding moment of group of anchorage rebars is proposed based on these findings. </p><p> Chapter 4 discusses the bearing crack initiation strength and the ultimate shear strength of the RC section where the ABS is embedded. With a combination of lever action by the embedded ABS and reaction moment retained by a group of anchorage rebars, shear force sustained by the RC section with the embedded ABS, or <i>Q<sub>RC</sub></i>, is amplified or reduced from the horizontal force <i>P</i> acting on the connection. The shear crack initiation strength <i>Q<sub>RC'</sub>,<sub>c</sub></i> and the ultimate shear strength <i>Q<sub>RC'</sub>,<sub>umean</sub></i> sufficiently agrees with test results, calculated by AIJ RC design standard with the effective width of the RC section considering the width of the ABS.</p><p> Chapter 5 proposes the stress transmission mechanism of the connection based on that for the embedded-type column base system. The shear strength estimation formulas for the RC connection with the ABS is proposed by a superposed strength method considering the effect of reaction moment provided by a group of anchorage rebars. </p>

    DOI CiNii

  • 大地震時における層中間ピン柱脚骨組の連層柱による損傷分散効果と作用曲げモーメントの評価

    古川 幸, 田村直樹, 木村祥裕

    日本建築学会構造系論文集  86 ( 781 ) 501 - 511 2021年03月  [査読有り]

  • SHEAR BEHAVIOUR OF CONNECTION BETWEEN STEEL AND REINFORCED CONCRETE MEMBERS ADOPTING A NEW COLUMN BASE SYSTEM ALLOWING THE STEEL MOMENT-RESISTING FRAME TO PERFORM BEAM YIELDING MECHANISM

    古川 幸

    8th international conference on Geotechnique, Construction Materials and Environment  2018年11月  [査読有り]

  • 十字型鋼板を溶接したアンカーボルトによる鋼-RC接合部の側方破壊性状 その1, その2 実験シリーズI

    古川 幸

    日本建築学会大会学術講演梗概集    1307 - 1310 2018年09月  [査読有り]

  • 層中間ピン柱脚中低層鉄骨骨組の地震応答に対する修正D値法の適用

    古川 幸

    日本建築学会大会学術講演梗概集    821 - 822 2018年09月  [査読有り]

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