Faculty Profiles - MORI, Masafumi

Papers - MORI, Masafumi

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井口道雄氏の討論に対する回答 Reviewed

鈴木承慈，福和伸夫，護　雅史

日本建築学会構造系論文集 Vol. 76 ( 610 ) page： 2195-2196 2011.12

青少年を対象とした耐震まちづくり啓発のための枠組みづくり Reviewed

護　雅史、川端寛文、松田曜子、福和伸夫

減災 page： 45-51 2011.7

耐震診断結果に基づく公営集合住宅建物の地震被害率の予測に関する研究 Reviewed

白瀬陽一,榊原啓太,福和伸夫,護雅史

日本建築学会構造系論文集 Vol. 76 ( 664 ) page： 1087-1094 2011.6

改良地盤上に立地した免震建物の地震時応答性状に関する考察 Reviewed

周方圓、護雅史、福和伸夫

日本建築学会技術報告集 Vol. 17 ( 36 ) page： 473-478 2011.6

埋込み基礎の基礎入力動簡易評価法 Reviewed

鈴木承慈、福和伸夫、護雅史

日本建築学会構造系論文集 ( 661 ) page： 535-541 2011.3

国内免震建物のデータベース構築と現状分析 Reviewed

田中佑治、福和伸夫、飛田潤、護雅史

日本建築学会技術報告集 Vol. 17 ( 35 ) page： 79-84 2011.2

ESTIMATION OF DAMAGED BUILDING RESPONSE BASED ON STRONG MOTION RECORDS DURING THE 2007 NIIGATA-KEN CHUETU-OKI EARTHQUAKE Reviewed

Transaction of AIJ ( 651 ) page： 933-942 2010.5

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

To make sure the relationship between strong ground motions and building damages, dynamic earthquake response analyses of a building, which had a slight damage during the 2007 Niigata-ken Chuetsu-oki earthquake, are performed. Earthquake records at ground surface have been observed by the K-NET system near the building. Also the building responses were observed during after-shock. The analysis model of the building is estimated based on results of a push-over analysis. Sway and rocking impedances are also installed in this model. The predominant frequency of the building in elastic condition is corresponding to that in after-shock observation. It is demonstrated that the response of the building, which is calculated considering the nonlinear characteristics of soil and building during the main-shock, is larger than the estimated response based on the damage situation of the building.

TORSINAL INPUT MOTION DUE TO FOUNDATION'S SHAPE AND COMPOSIT FOUNDATION Reviewed

Transaction of AIJ ( 649 ) page： 531-538 2010.3

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

In this paper, analytical examinations have been carried out in order to understand the torsional input motion induced by foundation's shape and the use of composite foundation. Analytical models are divided into five general categories; L-shape foundation or triangle-shape foundation supported by identical piles, square shape foundation supported by different diameter piles or supported by different length piles, and square foundation with partially embedment. It is clarified that the difference of pile section and partial embedment influences a lot on torsional input motion while the effect of foundation's shape and difference of pile length is not so much.

INTEGRATED ENVIRONMENT TO EXPERIENCE REALISTIC EARTHQUAKE SHAKING FOR PROMOTION OF DISASTER MITIGATION ACTIVITY Reviewed

AIJ J. Technol. Des. Vol. 15 ( 30 ) page： 605-610 2009.6

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

Two dimensional shaking table (cage) with 3m x 1m strokes is developed, which is available for a person to get on and to experience realistic earthquake shaking and building response. Indoor and outdoor shaking scene is projected in front of the cage and is synchronized with the movement of the shaking table. Input waves are simulated earthquake ground motions and building responses which are easily selected on the WebGIS maps considering the users' own houses. Small-sized shaking table is also developed for shaking experiment of indoor model with furniture falling down, and observed responses and video images are available in the large shaking table experience. Such a series of devices and systems provides realistic shaking experience and is effective for promotion of disaster mitigation activities.

A Study on Application of Place-Name for Improving Explanation of Seismic HazardProposal and applicability of the new place-name classification table based on the origin of geophysical features Reviewed

Transaction of AIJ ( 636 ) page： 409-416 2009.2

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

This paper proposes a new place-name classification table considering geographical features and soil characteristics, which
interpretation of seismic hazard maps. This table is classified into two soil groups (stiff soil and soft soil) based on the origin
Chinese characters. We select bus-stop name from many kinds of place-name. This reason is the following two points. Distribution
density of bus-stop is almost evenly in the city, bus-stop name mostly remain past place-name. The validity of the new place-classification table and bus-stop name is clarified through case studies on the three major metropolitan areas of Japan.

Influence of Seismometer Foundation, Adjacent Building and Surface Ground Condition on Strong Motion Records

M.Mori, N.Fukuwa and J.Tobita

Proceedings of 14th World Conference of Earthquake Engineering page： 02-0052 2008.10

Authorship：Lead author Language：English

To confirm whether a seismometer placed on a special foundation can accurately record strong ground motion at the surface level, we perform analytical and experimental studies into the influence of seismometer foundations, and on the presence of an adjacent building, on the ground motion recorded by seismometers. For our experiments, we utilize an earthquake observation record produced by a multi-channel array observation system installed in a building. It is determined that the seismometer foundations examined in this study can record horizontal and vertical responses at the free ground surface with good accuracy to about 10 Hz, and that the presence of an adjacent building influenced recording to greater or lesser amounts depending on the distance from the building to the observation site, with influence decreasing as distance from the building increases.

多点多成分振動観測記録の効果的な分析を支援する動画アプリケーションの開発 Reviewed

廣野衣美・牧原慎一郎・福和伸夫・飛田潤・護雅史・小島宏章

日本建築学会技術報告集 ( 28 ) page： 423-428 2008.10

WebGIS Simulator for Promotion of Seismic Retrofitting and Community Disaster Mitigation Activities

Tobita, Jun; Fukuwa, Nobuo; Mori, Masafumi; Sakaue, Hiroyuki; Takahashi, Hirohito; Hanai, Tsutomu

Proceedings of 14th World Conference of Earthquake Engineering page： 09-01-0023 2008.10

Strong Ground Motion Prediction by Using New Analysis Method Named `Pseudo Empirical Green's Function Procedure'

H.Takahashi, N.Fukuwa, H.Senga, K.Hayashi, M.Mori, J.Tobita

Proceedings of 14th World Conference of Earthquake Engineering page： 03-03-0031 2008.10

Developement of Vibration Experiment Education Material for Structural and Soil Dynamics

N.Fukuwa, J.Tobita, M.Mori, E.Koide, T.Hanai

Proceedings of 14th World Conference of Earthquake Engineering page： 12-03-0109 2008.10

杭配置に偏心を有する杭支持構造物の地震時ねじれ挙動に関する研究 Reviewed

木村　匠，真野英之，社本康広，中井正一，松井和幸，護　雅史

日本建築学会構造系論文報告集 ( 626 ) page： 543-549 2008.4

*根入れを有する直接基礎における側面と底面の動的相互作用特性とそれらの重合による地盤ばねの実用的評価法の検討 Reviewed

護　雅史，福和伸夫，酒井理恵子，文　学章

日本建築学会構造系論文報告集 ( 626 ) page： 535-542 2008.4

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

本論では、動的相互作用の基本物理量の観点から、根入れ基礎を底面・側面の各要素に分解し、条件を整理して各要素の特性を詳細に分析する。さらに、分解したインピーダンスを再び重ね合せることで、埋込みSRモデルや限耐法における地盤ばね評価方法の物理的意味や妥当性について検討するとともに、新たな評価方法について検討している。学内共同研究者：福和伸夫教授、飛田潤准教授,小島宏章助教

杭基礎構造物の耐震性に及ぼす基礎梁の剛性の影響 Reviewed

木村　匠，社本康広，松井和幸，真野英之，護　雅史，中井正一

日本建築学会構造系論文報告集 ( 618 ) page： 41-48 2007.8

大規模群杭の非線形地震応答解析におけるフレームモデルに用いる相互作用ばねの評価方法に関する研究

護雅史・福和伸夫

日本建築学会大会学術講演梗概集 page： 115-116 2007.8

*EVALUATION OF A LARGE SCALE PILE GROUP FOR A NONLINEAR EARTHQUAKE RESPONSE ANALYSIS OF PILE-SUPPORTED BUILDINGS BY USING FRAME MODELS

Masafumi MORI, Nobuo FUKUWA and Xuezhang WEN

The 4th U.S.-Japan Workshop On Soil-Structure-InteractionTsukuba, Japan, March 28-30, 2007 page： B-1(15) 2007.3

Authorship：Lead author Language：English

In Japan, it is necessary to confirm earthquake-proof safety of existing buildings immediately for a coming big earthquake in the near future. Most of important buildings and facilities, for example thermal power plants and high-rise buildings, which are located on claimed ground such as water front, have pile supported foundations. To evaluate the earthquake resistance performance of these pile-supported buildings, a dynamic earthquake response analysis or a static increment analysis is often conducted by using a frame model. The frame model is usually composed with the beam elements as piles and soil spring elements as soil surrounding piles. In this paper, we propose the evaluation method of these soil springs for nonlinear earthquake response analysis of the structures supported by a large number of piles. And the applicability and the problems of proposed method are examined by applying it to an assumed pile foundation. Concretely, the impedance matrix of pile group is translated to the tridiagonal matrix which consists of axis springs and shear springs calculated by assuming uniform displacement distribution and movement displacement distribution of soil surrounding piles. As a result, we can estimate soil springs considering the difference of pile position. But, there is also a possibility of becoming overestimate or underestimate depending on pile position. Further examination is necessary in the future.

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