Faculty Profiles - HIBINO, Yo

Papers - HIBINO, Yo

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Outline Of Field Investigation Results By The Türkiye-Japan Joint Reconnaissance Team International coauthorship

Koichi Kusunoki, Alper Ilki, Yo Hibino, Seitaro Tajiri, Yusuke Maida

fib Symposium page： 254 - 263 2024.11

Language：English Publishing type：Research paper (international conference proceedings)

Due to the preliminary information on the devastating damage in the affected area due to the 2023 Türkiye-Syria Earthquakes, AIJ (Architectural Institute of Japan) JSCE (Japan Society of Civil Engineering), JGS (Japan Geotechnical Society), and Grantsin- Aid for Scientific Research team decided to organize a joint reconnaissance team. The team consisted of 27 members from Japan and 22 members from Türkiye. It was the largest international investigation team for AIJ. The target items to be investigated were Reinforced concrete (R/C), Steel, Wall-type, Masonry, Hospital, Base-isolated structures, Geotechnical issues, Strong motion characteristics, and code systems. The building damage around the strong motion observation stations was investigated to confirm if the building damage coincided with the level of measured accelerations. The widespread damages and collapses to R/C buildings showed that the structures did not have sufficient displacement capacity due to insufficient amount and detailing of transverse reinforcement. Also, the spacing between longitudinal rebars at the lap splice joints is insufficient and does not allow the proper concrete placement for achieving a sufficient bond between concrete and reinforcement. Many buildings were inclined due to uneven settlement in Gölbaşı (mostly due to liquefaction), where the soil condition was poor. The pile foundation is recommended for buildings on soft soil. A detailed investigation was also conducted to collect the dimensions of members, span lengths and heights, and material properties so that the buildings can be modeled on a computer. The code compliance system in the affected area and recovery plan were also investigated. As the conclusions, the findings and lessons from this earthquake damage were summarized. The effects of sequences of strong seismic activities as experienced during the 2023 Türkiye-Syria Earthquakes should also be further investigated.

Scopus

パイルキャップが先行破壊する既製杭基礎接合部の補強筋の効果 Reviewed

日比野陽, 高橋広生, 楠浩一, 向井智久

コンクリート工学年次論文集 Vol. 45 ( 2 ) page： 541 - 546 2023.7

Application of Digital Image Correlation Method in RC and FRC Beams under Bending Test Reviewed International coauthorship

Aris Aryanto, Messa Revolis, Yuki Oribe, Yo Hibino

International Journal of GEOMATE Vol. 24 ( 101 ) page： 118 - 125 2023.1

Evaluation of thermal crack width and crack spacing in massive reinforced concrete structures subject to external restraints using RBSM Reviewed

Puttipong Srimook, Ippei Maruyama, Kazutoshi Shibuya, Sayuri Tomita, Go Igarashi, Yo Hibino, Kazuo Yamada

ENGINEERING FRACTURE MECHANICS Vol. 274 2022.10

Language：English Publishing type：Research paper (scientific journal) Publisher：PERGAMON-ELSEVIER SCIENCE LTD

This study aimed to develop a numerical method to evaluate thermal cracking, in terms of pa-rameters such as thermal crack width and crack spacing, on massive reinforced concrete (RC) wall structures externally restrained by a base structure. The existing experimental study was inves-tigated using the rigid body-spring model (RBSM) with new constitutive laws developed for this objective. Thermal cracks, which localized and propagated throughout the wall thickness, were successfully reproduced, and the good agreement with the experiment indicated the capability of the proposed numerical method. The time-dependent cracking behavior and the impacts of fac-tors affecting thermal cracking, which are difficult to investigate experimentally, are discussed.

DOI： 10.1016/j.engfracmech.2022.108800

Web of Science

Scopus

E-Defense Shake-table Test of a Building Designed for Post-disaster Functionality Reviewed

Trevor Zhiqing Yeow, Koichi Kusunoki, Izumi Nakamura, Yo Hibino, Satoru Fukai, Walid Ahmad Safi

JOURNAL OF EARTHQUAKE ENGINEERING Vol. 26 ( 10 ) page： 5153 - 5174 2022

抵抗機構に基づくRC柱部材の理論的な降伏変形評価法 Reviewed

趙波，日比野陽，浅井竜也，勅使川原正臣

コンクリート工学年次論文集 Vol. 43 ( 1 ) page： 85 - 90 2021.7

Impact of Drying on Structural Performance of Reinforced Concrete Beam with Slab. Reviewed

Pranjal Satya, Tatsuya Asai, Masaomi Teshigawara, Yo Hibino, Ippei Maruyama

Materials (Basel, Switzerland) Vol. 14 ( 8 ) 2021.4

壁縦筋の定着の有無が袖壁付柱の短期許容曲げ耐力に与える影響 Reviewed

百家祐生, 真田靖士, 張政, 尹ロク現, 楠浩一, 日比野陽, 向井智久

日本建築学会構造系論文集 Vol. 85 ( 778 ) page： 1611 - 1621 2020.12

INITIAL DAMAGE OBSERVATIONS FROM AN E-DEFENSE SHAKE TABLE TEST OF A BUILDING WITH POST-DISASTER FUNCTIONS Reviewed

Trevor YEOW, Koichi KUSUNOKI, Izumi NAKAMURA, Yo HIIBNO

Proceedings of the Japan Concrete Institute Vol. 42 ( 2 ) page： 739 - 744 2020.7

Impact of the reinforcement detailing on seismic performance of isolated non-structural walls Reviewed

Safi W.A

Buildings Vol. 10 ( 5 ) 2020.5

The structural performance of reinforced concrete members with monolithic non-structural walls under static and dynamic loads Reviewed

Safi Walid Ahmad, Hibino Yo, Kusunoki Koichi, Mukai Tomohisa, Sanada Yasushi, Nakamura Izumi, Fukai Satoru

Buildings Vol. 10 ( 5 ) 2020.5

EVALUATION OF BOND STRESS OF CUT-OFF SECOND LAYER LONGITUDINAL BARS WITH ADDITIONAL STIRRUPS IN HIGH-STRENGTH REINFORCED CONCRETE BEAMS Reviewed

HIBINO Yo, ICHINOSE Toshikatsu, MIYATA Hideki, YAGI Shigeharu, KUSUHARA Fumio

Journal of Structural and Construction Engineering (Transactions of AIJ) Vol. 85 ( 770 ) page： 551-561 - 561 2020.4

Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)

Aiming to increasing of workability and productivity of construction of high-rise reinforced concrete buildings, cut-off longitudinal bars in the second layer has been used. However, it is known that flexural cracks tend to open at termination point, and it leads to develop diagonal tension cracks. In addition, high-strength materials have been used for longitudinal and transverse reinforcements. In this study, to assess failure behavior, seismic performance of reinforced concrete beams having cut-off longitudinal bars with high-strength concrete and steels, test of beams which reinforcement ratio are 0.3−1.2% were carried out. Additional stirrups were installed to prevent crack around the head of the cut-off longitudinal bars.
For the test, four-teen 1/2.5-scaled test specimens of reinforced concrete beams were fabricated. The size of cross-section (250mm×400mm) is the same for all specimens as shown in Fig. 1(a). Five longitudinal bars were arranged in both the first and second layers, and the five longitudinal bars in the second layer is cut off. The main parameters are presence of cut-off longitudinal reinforcement, ratio of transverse reinforcement and location of additional stirrups. The parameters of beams are shown in Table1. The ratio of transverse reinforcements was arranged as follows: 0.3%, 0.6% and 1.2%. The additional stirrups were placed with two types of arrangement manner, which are placed in the head of cut-off longitudinal bars and in the region of middle of beams including in the head of cut-off longitudinal bar as shown in Fig. 1(c). Concrete compressive strengths of beams were from 54 to 77 N/mm2 . High-strength steel bars were used for longitudinal, transverse reinforcement and additional stirrups. The length of the beam was designed to 1600mm. The cut-off length of 680 mm corresponds to required length of cut-off longitudinal bars specified in AIJ standard.
Cyclic loading was applied with antisymmetric moment so that horizontal load is applied to the center of the beam as shown in Fig. 2. From the tests, following conclusions were obtained. 1) It is better to place the additional stirrups both in the head of cut-off longitudinal reinforcement and the region where longitudinal bar is placed in one layer to prevent undesirable cracks; 2) Smaller width of residual cracks of the beam with additional stirrups in the head of cut-off longitudinal bars was found. Shear capacity of the beam with additional stirrups was increased by arrangement of additional stirrups; 3) The maximum bond stress in the head of cut-off longitudinal bars was larger than bond strength calculated by AIJ standard; however, difference in maximum bond stress by arrangement of additional stirrups was not observed; 4) It is verified that maximum bond stress of cut-off longitudinal bars at the head region with additional stirrups can be predicted by present AIJ standard.

DOI： 10.3130/aijs.85.551

Scopus

Estimation of site response during the 2016 Chauk, Myanmar earthquake based on microtremor-derived S-wave velocity structures Reviewed

Miura Hiroyuki, Fujita Hidetaka, Than Khaing Su Su, Hibino Yo

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING Vol. 126 2019.11

Prediction of Torsional Response of Multi-story Shear Wall Buildings and Its Verification

Yo Hibino, Chiaki Yonehara, Shunsuke Inoue

Proceedings of 2nd International Workshop on Advanced Materials and Innovative Systems in Structural Engineering: Novel Researches 2019.9

Structural performance of reinforced concrete members with non-structural walls without anchorage of wall reinforcement

Yo Hibino, Yasushi Sanada, Koichi Kusunoki

Proceedings of International Conference in Commemoration of 20th Anniversary of the 1999 Chi-Chi Earthquake page： SE11-024 2019.9

EXPERIMENTAL STRUCTURAL PERFORMANCE EVALUATION OF RC COLUMNS WITH WING WALLS WITHOUT WALL VERTICAL REBAR ANCHORAGE Reviewed

Misako TSUBAKI, Yasushi SANADA, Zheng ZHANG, Koichi KUSUNOKI, Yo HIBINO, Tomohisa MUKAI

Journal of structural and construction engineering Vol. 84 ( 762 ) page： 1093-1103 2019.8

高強度せん断補強筋を有するRC柱部材の付着割裂時せん断耐力 Reviewed

小本直弥, 日比野陽, 市之瀬敏勝, 宮田英樹

コンクリート工学年次論文集 Vol. 41 ( 2 ) page： 121-126 2019.7

都市防災への活用を目的とした建築物の瞬時被害把握システム

日比野陽

建設機械 Vol. 55 ( 6 ) page： 48-53 2019.6

都市防災への活用を目的とした建築物の瞬時被害把握システムの開発 (特集防災,災害対応・復旧・復興,国土強靭化)

日比野陽

建設機械施工 Vol. 70 ( 12 ) page： 49-55 2018.12

E-DEFENSE SHAKING TABLE TEST ON SOIL-PILE-STRUCTURE INTERACTION SYSTEM Evaluation of earthquake response of pile-supported RC structure Part 1 Reviewed

Masatoshi YAMAZOE, Koichi KUSUNOKI, Yuji SAKO, Hajime OKANO, Yo HIBINO, Kuniyoshi SUGIMOTO, Yohsuke KAWAMATA, Hisatoshi KASHIWA

Journal of structural and construction engineering Vol. 83 ( 749 ) page： 985-995 2018.7

複数の鉄筋コンクリート造二次壁を有する架構の崩壊機構推定に関する研究 Reviewed

森悠吾, 橋根靖弥, 向原進太, 日比野陽

コンクリート工学年次論文集 Vol. 40 ( 2 ) page： 883-888 2018.7

加速度計を用いた連層耐震壁を有するSRC造建物の動的応答推定 Reviewed

米原千晶, 井上峻輔, 日比野陽

コンクリート工学年次論文集 Vol. 40 ( 2 ) page： 913-918 2018.7

Shear strength prediction for brittle reinforced concrete member considering concrete stress conditions

Yo Hibino, Yusuke Yamaki

Proceedings of the 16th World Conference on Earthquake Engineering page： Paper ID: 2810 2017.1

加速度センサーによる連層耐震壁の地震時変形性能評価 Reviewed

光宗純平, 日比野陽

コンクリート工学年次論文集 Vol. 38 ( 2 ) page： 961-966 2016.7

脆性破壊するRC部材の内部応力度とせん断耐力評価に関する研究 Reviewed

山木裕介, 日比野陽

コンクリート工学年次論文集 Vol. 38 ( 2 ) page： 187-192 2016.7

拘束されたRC非耐力壁の軸力に関する解析的検討 Reviewed

査冬, 橋根靖弥, 日比野陽

コンクリート工学年次論文集 Vol. 38 ( 2 ) page： 109-114 2016.7

開口間に施工される複数の非耐力方立壁の変形及び破壊性状に関する研究 Reviewed

橋根靖弥, 査冬, 日比野陽

コンクリート工学年次論文集 Vol. 38 ( 2 ) page： 49-54 2016.7

Field Investigation in affected area due to the 2015 Nepal Earthquake by AIJ reconnaissance team: Damage assessment and seismic capacity evaluation of buildings in Gongabu

Yo Hibino, Naoki Onishi, Akihiro Nakamura, Yusuke Maida

Proceedings of the 14th International Symposium on New Technologies for Urban Safety of Mega Cities in Asia (USMCA 2015) 2015.10

Behavior of mullions formed in non-structural RC partition walls with openings

Yo Hibino, Dong Zha, Ryosuke Takahashi

Proceedings of the Third Conference on Smart Monitoring, Assessment and Rehabilitation of Structures page： Paper ID: 219 2015.9

RC部材の軸力の有無による内部応力状態変化とせん断終局強度 Reviewed

石田雄太郎, 日比野陽

コンクリート工学年次論文集 Vol. 37 ( 2 ) page： 169-174 2015.7

既存RC建物における梁部材の耐震性能評価 Reviewed

荒木秀夫, 徳川達也, 日比野陽

コンクリート工学年次論文集 Vol. 36 ( 2 ) page： 715-720 2014.7

Seismic performance of damaged RC buildings in 2011 Van Earthquakes International coauthorship

Yo Hibino, Hidekazu Watanabe, Koichi Kusunoki, Akira Tasai, Muneyoshi Numada, Mucip Tapan, Alper Ilki

Procedings of the 2013 International Van Earthquake Symposium 2013.10

Outline of field investigation for 2011 Van Earthquakes International coauthorship

Koichi Kusunoki, Yo Hibino, Hidekazu Watanabe, Akira Tasai, Muneyoshi Numada, Mucip Tapan, Alper Ilki

Procedings of the 2013 International Van Earthquake Symposium 2013.10

EVALUATION OF DEFORMATION AT SHEAR FAILURE OF REINFORCED CONCRETE COLUMN AND BEAM AFTER FLEXURAL YIELDING Reviewed

Masaomi TESHIGAWARA, Akihiro NAKAMURA, Yo HIBINO

Journal of structural and construction engineering Vol. 78 ( 683 ) page： 157-163 2013.1

SHEAR STRENGTH OF REINFORCED CONCRETE COLUMNS WITH LOW WEB REINFORCEMENT CONSIDERING COMPRESSIVE STRUT SHAPE Reviewed

Yo HIBINO, Masanori HISADA, Yasuji SHINOHARA, Shizuo HAYASHI

Journal of structural and construction engineering Vol. 77 ( 677 ) page： 1113-1122 2012.7

RC造円形断面部材のせん断力伝達機構に関する研究 Reviewed

桑野淳, 日比野陽, 篠原保二, 林靜雄

コンクリート工学年次論文集 Vol. 34 ( 2 ) page： 121-126 2012.7

高強度鉄筋を主筋に使用した場所打ち杭の曲げ性状に及ぼす軸力の影響 Reviewed

鈴木翔太, 日比野陽, 篠原保二, 林靜雄

コンクリート工学年次論文集 Vol. 34 ( 2 ) page： 109-114 2012.7

Quick Report of 2011 Van Earthquake International coauthorship

Koichi Kusunoki, Akira Tasai, Yo Hibino, Hidekazu Watanabe, Muneyoshi Numada, Mucip Tapan, Alper Ilki

Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake page： 1950-1961 2012.3

RC造有孔梁のせん断伝達機構に関する実験研究 Reviewed

桑野淳, 日比野陽, 篠原保二, 林靜雄

コンクリート工学年次論文集 Vol. 33 ( 2 ) page： 259-264 2011.7

主筋の腐食が鉄筋コンクリート部材の付着割裂強度に及ぼす影響 Reviewed

日比野陽, 森田健, 篠原保二, 林靜雄

コンクリート工学年次論文集 Vol. 33 ( 2 ) page： 655-660 2011.7

補強筋量が少ないRC造柱のせん断強度に及ぼす軸力の影響 Reviewed

久田昌典, 日比野陽, 篠原保二, 林靜雄

コンクリート工学年次論文集 Vol. 33 ( 2 ) page： 2049-2053 2011.7

Damage Investigation of Reinforced Concrete Buildings at the 2010 Chile Earthquake International coauthorship

Taiki Saito, Susumu Kono, Koichi Kusunoki, Yousok Kim, Tomoya Matsui, Masanori Tani, Yo Hibino, Carlos Zavala, and Patricia Gibu

Proceedings of 8th International conference on urban earthquake engineering page： 679-686 2011.3

Flexural behavior of belled pile with high-strength longitudinal reinforcement

Yo Hibino, Yasuji Shinohara, and Shizuo Hayashi

Proceedings of 8th International conference on urban earthquake engineering page： 819-824 2011.3

FAILURE MODE IN SHEAR AND EVALUATION OF DEFORMATION CAPACITY AFTER FLEXURAL YIELDING FOR REINFORCED CONCRETE SHEAR WALL Reviewed

Masaomi TESHIGAWARA, Manami KAWASAKI, Hiroki TAUCHI, Akihiro NAKAMURA, Yo HIBINO

Journal of structural and construction engineering Vol. 75 ( 657 ) page： 2037-2043 2010.11

高強度鉄筋を主筋に用いた場所打ち杭の曲げ性状に関する研究 Reviewed

日比野陽, 堺勤, 篠原保二, 林靜雄

コンクリート工学年次論文集 Vol. 32 ( 2 ) page： 853-858 2010.7

EVALUATION FOR SLIP MECHANISM OF COLUMN-SHAPED WALL ASSUMED MULTI-STORY SHEAR WALL AFTER FLEXURAL YIELDING Reviewed

Lin XU, Yo HIBINO, Masaomi TESHIGAWARA, Yukio BAN, Tatsuzo UMENO

Journal of structural and construction engineering Vol. 75 ( 649 ) page： 617-623 2010.3

連層耐震壁の中間階における枠梁のせん断強度に対する効果 Reviewed

田内浩喜, 川崎愛, 中村聡宏, 勅使川原正臣, 日比野陽, 市之瀬敏勝, 福山洋, 神谷隆

構造工学論文集 Vol. 56B page： 61-66 2010.3

袖壁補強柱の耐震性能評価に関する研究 Reviewed

中村聡宏, 勅使川原正臣, 日比野陽, 井上芳生, 太田勤, 田尻清太郎

構造工学論文集 Vol. 56B page： 7-14 2010.3

連層耐震壁の中間階における枠梁のせん断強度に対する効果 Reviewed

田内浩喜, 川崎愛, 中村聡宏, 勅使川原正臣, 日比野陽, 市之瀬敏勝, 福山洋, 神谷隆

構造工学論文集 Vol. 56B page： 61-66 2010.3

Structural Retrofit for Depth Reduced Beam in Mid-rise Existing Reinforced Concrete Boxed Wall-buildings

Yo Hibino, Hiroki Tauchi, and Masaomi Teshigawara, Hiroshi Fukuyama, and Yoshio Inoue

Proceedings of 7th CUEE and 5th ICEE Joint Conference page： Paper ID: 04-175 2010.3

外付け壁梁と壁の接合部耐力 Reviewed

田内浩喜, 日比野陽, 勅使川原正臣, 井上芳生

コンクリート工学年次論文集 Vol. 31 ( 2 ) page： 259-264 2009.7

既存壁式鉄筋コンクリート造建物の梁せい低減に対する補強方法 Reviewed

日比野陽, 勅使川原正臣, 福山洋, 井上芳生

コンクリート工学年次論文集 Vol. 31 ( 2 ) page： 253-258 2009.7

Procedure to predict the storey where plastic drift dominates in two-storey building under strong ground motion Reviewed

Yo Hibino, Toshikatsu Ichinose, J. L. Domingues Costa, M. P. Nielsen

Earthquake Engineering & Structural Dynamics Vol. 38 ( 7 ) page： 929-939 2009.6

連層耐震壁の曲げスリップに関する研究 Reviewed

徐霖, 日比野陽, 勅使川原正臣, 伴幸雄, 梅野達三

構造工学論文集 Vol. 55B page： 401-407 2009.3

Cumulative Strength Index Distribution Along Building Height and Story Collapse Rate in Reinforced Concrete Buildings Reviewed

Hibino Yo, Kikuchi Masaru, Teshigawara Masaomi

Proceedings of the 14th World Conference on Earthquake Engineering page： Paper ID 05-01-0440 (CD-ROM) 2008.10

EFFECTS OF CUMULATIVE STRENGTH INDEX DISTRIBUTION ALONG STORIES ON DAMAGE CONCENTRATION IN RC BUILDINGS Reviewed

Yo HIBINO, Masaru KIKUCHI and Masaomi TESHIGAWARA

Journal of Structural Engineering Vol. 54B page： 437-441 2008.4

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

This paper presents a study on the effects on damage concentration in RC buildings by the cumulative strength index (CTU) distribution along the stories. Dynamic response analyses were conducted for two types of building: the one type has a weak story; the other type has two weak stories. The following conclusions were derived from the dynamic response results: 1) In case of the building with the
same CTU in all stories, the damage can concentrate in all stories, although the damage is like to concentrate in the first story; 2) In case of the building with weak first story, if CTU of the first story is 20% to 30% weaker than the averages of CTU in the building, the damage concentrates in the first story; 3) In case of the building with two weak stories, damage will concentrate in which weak story depends on the margin of CTU of between the weak stories. However, beam yielding mechanism should be considered, especially in
case of the building with unbalanced CTU distribution along the stories or that CTU is large.

粗い間隔でアラミド繊維補強を施したRC柱の曲げせん断性状 Reviewed

花井伸明, 西健太郎, 日比野陽, 市之瀬敏勝

コンクリート工学年次論文集 Vol. 29 ( 3 ) page： 1531-1536 2007.7

RESPONSE OF BUILDING ISOLATED WITH SLIDING BEARINGS UNDER STRONG GROUND MOTION -A study based on Rigid-Plastic theory- Reviewed

Yo HIBINO and Toshikatsu ICHINOSE

Journal of Structural Engineering Vol. 53B page： 17-23 2007.3

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

We conducted dynamic response analyses to study the response of base-isolated two-story house under strong ground motions.
We used two kinds of input waves: rectangular-shaped wave and real seismic records. We used a bilinear model to represent the isolation system and the upper stories. The response of the Rigid-Plastic model was similar to that of the bilinear model. The following criteria were derived from the Rigid-Plastic theory: 1) No story or isolation system deforms; 2) Only isolation system deforms; 3) Only upper structure deforms; 4) Both upper structure and isolation system deform. The criteria were effective to approximately classify the results of the response analyses.

CRITERIA TO PREDICT THE STORY WHERE PLASTIC DRIFT DOMINATES IN TWO-STORY STEEL BUILDING UNDER STRONG GROUND MOTION Reviewed

Yo Hibino and Toshikatsu ICHINOSE

Journal of structural and construction engineering ( 606 ) page： 105-111 2006.8

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

The objective of this paper is to establish criteria using which one can predict the story where plastic drift dominates in two-story steel building under strong ground motion. The dynamic response analyses were conducted for Elasto-Plastic and Rigid-Plastic models. The following conclusions are obtained for the response of Rigid-Plastic model. 1) If the shear coefficient of the 2nd story exceeds the base shear coefficient, the plastic drift occurs only in the 1st story. 2) Otherwise, the plastic drift occurs also in the 2nd story. The story of which plastic drift dominates can be predicted considering the story shear coefficient, the peak ground acceleration and the mass distribution of structure as shown in Fig. 12. Similar conclusions are obtained for Elasto-Plastic model if the story shear coefficients are small enough.

RC骨組の地震時塑性率に及ぼす柱梁耐力比の影響 Reviewed

日比野陽, 市之瀬敏勝

コンクリート工学年次論文集 Vol. 27 ( 2 ) page： 85-90 2005.6

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

RC 骨組について地震応答解析を行い，柱梁耐力比が柱や梁の塑性率に及ぼす影響について考察した。層数や柱と梁の強度，地震動，階高をパラメータとし，柱の塑性化分布から層崩壊機構を防ぐために必要な柱梁耐力比を求めた。解析結果から次の結論を得た。(1) 明確な弱点階を有する建物であっても，層崩壊機構を防ぐための柱梁耐力比の上限は存在する。(2) 最大速度1.0m/s 程度の地震波において，明確な弱点階を有する建物の層崩壊機構を防ぐための柱梁耐力比は，弱点階を有しない建物で必要な柱梁耐力比より0.4～0.6 程度大きい。(3) 層崩壊機構を防ぐための柱梁耐力比は，建物の強度分布が同じである場合には，地震力の大きさに影響を受ける。

EFFECTS OF COLUMN-TO-BEAM STRENGTH RATIO ON SEISMIC ENERGY DISTRIBUTION IN STEEL FRAME STRUCTURES Reviewed

Yo HIBINO and Toshikatsu ICHINOSE

Journal of Structural Engineering Vol. 51B page： 277-284 2005.3

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

This paper presents a numerical study on the column-to-beam strength ratio that affects the seismic energy dissipation of beams and columns in fish-bone-type steel moment frames. The major parameters are number of stories, strengths of columns and beams, and ground motions. The seismic energy dissipation is classified into two categories: energies contributing to story mechanism and total mechanism. The following conclusions are obtained: (1) It is suitable for the column-to-beam strength ratio to be defined by the total of the strength of the beams and columns at a node for evaluating the seismic response; (2) As the column-to-beam strength ratio increases from 1 to 1.3, the energies contributing to story mechanism decreases significantly in the most cases.

New Method for Estimating Seismic Response of Frame Structures Considering Collapse Mechanism Reviewed

Yo HIBINO, Hisashi UMEMURA, Toshikatsu ICHINOSE

Proceedings of the 13th World Conference on Earthquake Engineering page： 2357 2004.8

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

For seismic performance-based design, it is important to evaluate structural performance for various seismic excitations. The absorbed energy in a structure, which is closely related to the seismic damages, can be an index to evaluate a building by performance. The energy attributed to the total and collapse mechanisms were evaluated for RC and steel frame structures under 84 ground motions and were
compared each other to study energy demand on structure. The maximum drifts gained by dynamic response analyses were compared with the cumulative plastic story drifts evaluated from energy. Then, a factor which indicates the relationships between cumulative plastic story drifts and dynamic responses were obtained. The estimation method was presented using the factor and its applicability was evaluated.

EVALUATION OF SEISMIC RESPONSE FOR BUILDINGS USING STORY-SHEAR-SAFETY FACTOR BASED ON ENERGY PRINCIPLE Reviewed

Yo Hibino, Nanako Marubashi, Hisashi Umemura, Toshikatsu Ichinose

Proceedings of the ninth East Asia-pacific conference on Structural Engineering and Construction page： VID-97-VID-102 2003.12

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

It is important to estimate the response of buildings under earthquakes from the viewpoint of life reservation and risk management. This paper presents a method to estimate the story drifts of both RC and steel buildings using a story-safety factor (SSF) based on the energy concept. In this paper, the method was verified by dynamic response analyses of RC and steel structures with various conditions. The method predicted the mean of story drifts well irrespective of the differences in the models used.

PROBABILISTIC ESTIMATION OF SEISMIC RESPONSE OF BUILDINGS CONSIDERING UNCERTAINTY OF COLLAPSE MODE Reviewed

Nanako Marubashi, Yo Hibino, Hisashi Umemura, Toshikatsu Ichinose

Proceedings of the ninth East Asia-pacific conference on Structural Engineering and Construction page： MCS-1-MCS-6 2003.12

Language：English Publishing type：Research paper (international conference proceedings)

This paper estimates the effect of strength deterioration on the seismic response of reinforced concrete (RC) structures with a weak story. Strength deteriorates because of partial failure or the P-delta effect. In particular structures with weak stories tend to collapse accompanied by strength deterioration. The story with strength deterioration cannot consume much cumulative plastic energy, thus exhibiting large-scale deformations. We predicted the capacity of the cumulative plastic energy of the story through the number of reversed cycles of shear force. The numbers of reversed cycles are related to the duration of the input ground motions. Therefore, we selected ground motions with various durations while the coefficient of strength degradation is selected as a structural parameter. And we examined the seismic response of structures with a weak story. The structures are designed using the "story-shear-safety factor" which represents the capacity against story collapse. As a result, the relation between the duration and the reversed cycle was formulated. We then proposed an effective method to predict the capacity of cumulative plastic energy by using the formula.

DEVELOPMENT OF EDUCATIONAL SOFTWARE FOR STRUCTURAL MECHANICS Reviewed

Naoya WAKITA, Yo HIBINO, Tomoharu HAYASE, Toshikatsu ICHINOSE

Journal of Architecture and Building Science ( 17 ) page： 525-530 2003.6

Language：Japanese Publishing type：Research paper (scientific journal)

Computer software for structural mechanics was developed to improve education of structural mechanics. A new lecture style was proposed using this software and accompanying manuals. This software visualizes mechanics including bending moment, axial or shear force and so on. Each student can easily understand these concepts through virtual experiment on computer changing the location or the magnitude of force as if he or she was loading forces on a real structure. Results of questionnaire proved that this software is effective for studying structural mechanics.

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