地域の要望や問題を学生主導で解決に導くPBL授業である．本PJでは，徳山商工会議所および地元企業より①住工分離②新たな観光資源や魅力の創出③災害時の緊急輸送対応等の観点から、徳山―下松港に長大橋を新設するためのコンセプト案の要望があり，本校の専攻科生が平成29年度 環境建設工学専攻総合演習の課題として取り組むこととなった。

産官学民の幅広いメンバーで構成される周南市の任意団体「しゅうニャン橋守隊（CATS-B）」の副隊長として，道路施設の重要性や現状を学生，子どもたち，地域住民等に教育・啓発する．日常生活の延長上で実施できる道路インフラの簡易点検・清掃活動を周南市民のニーズに合わせた体験型ボランティア活動として展開している．なお，本活動は平成28年度に6省庁によって新設された第1回インフラメンテナンス大賞において，メンテナンスを支える部門で国土交通大臣賞を受賞（平成29年7月）した．

建設分野の技術者教育では，昔から『 現場100回 』と言われるように，実際の建設現場をできるだけ多く知り，授業と関連付けて学習することが非常に重要である．しかし，40名超の現場見学会の実施は，昨今の高専を取り巻く状況を鑑みると容易ではなく個人の興味の差が激しい．一方で，数名レベルでの少人数現場見学会であればハードルが低く、参加した学生がクラスに「おしゃべり」することで学生全体のキャリア意識を向上させる効果に着目し，平成26年度より現場100回プロジェクトと題して年数回～10回程度の小規模現場見学会（学生参加自由）を普段の研究活動や校務で培ってきた産官学の連携により実現している．

デザコンは専門的課外活動に位置づけられ，土木建築分野に不可欠なものづくりのための専門知識のほか，チームワークや協調性といった人間力を総合的に養う場でもある．この性質は構造デザイン部門では特に顕著であり，デザコン活動を通じて学生の技術者としての素養を涵養する．また，受賞を通じて学生に成功体験をさせることで，専門分野に対するモチベーションの向上を図る．なお，これまでのデザコン実績は下記の通り． 平成22年度：審査員特別賞「らち☆すた」 平成23年度：審査員特別賞「麒麟」 平成26年度：優秀賞（第2位）「百折不塔」 平成27年度：優秀賞（第2位）「繊月」 　　　　　　優秀賞（第3位）「美環」 平成28年度：優秀賞（第2位）「結美弦」 　　　　　　日刊建設工業新聞社賞（第4位） 　　　　　　　　　　 　　　「透ヶ織」 平成29年度：最優秀賞（第1位）「紡希」 平成30年度：審査員特別賞（第4位）「国士夢想」

近年，身近な材料を使った模型教材が積極的に提案されており，直感的な作業を通して力学を楽しく学べるよう工夫された授業が多くの大学や高専に導入されている。この種の模型教材の殆どは製作に時間がかかる上，載荷実験を行うまで実際の強さが分からない。さらに準備や片付けの手間や費用が増加しがちであり，教員や学生の負担も大きい。そこで本研究室では，自重の概念を考慮できる新しい構造力学導入教材として乾麺パスタと油粘土を用いた質点系3次元トラスタワーモデルを考案し，これを体験した小中学生と高専1年生にアンケート調査を実施した。その結果，「難しい」と回答した人が全体の88%を占めていたにも関わらず「面白い」との回答も95%にまで達していること等，力学教材としての有効性を示した。なお，本教材は平成25年度　全国高等専門学校 第１回小中学生向理科技術教材開発コンテストにおいて　最優秀賞を受賞しており，本校の新1年生に対する構造力学導入科目に現在も活用されている．

愛媛大学環境建設工学科では，学部３回生対象の環境建設工学特別演習Ⅰを「ミニ卒論」と位置づけ，各教員に配属し，研究室の正式配属前に自らの力で課題を解決する能力を養っている。その特別演習の課題として，学生と共に弾性座屈実験装置を新たに開発・製作した。これまでに，土木系の学生実験で実験器材の関係から，重要視されながらもほとんど扱われなかった弾性座屈実験を気軽にしかも精度よく実験することが可能となった。本実験装置は，載荷試験機を持たない工業高校などの学校でも手軽かつ安価（1万円以下）に製作でき，かつ現象を忠実に再現可能な装置としてアイデアを普及させ，また引き続き改良していく予定である。

（全体概要） 　簡便で精度を向上できる腐食構造物の強度劣化測定方法と，将来予測方法とを実現する。解決手段としては腐食構造物の腐食表面形状を，非接触式かつ三次元にて測定する。パラメータを変化させて種々な凹凸表面形状を再現するための表面形状作成モデルを用い，三次元的にて測定された上記腐食表面形状の凹凸に合うように上記表面形状作成モデルに関するパラメータを算出し，上記算出されたパラメータによる上記表面形状作成モデルに基づく将来の腐食表面形状を算出し，上記腐食構造物における将来の強度劣化を上記将来の腐食表面形状によって予測する。 （担当部分概要） 　腐食表面形状の非接触３次元計測およびデータ処理技術。腐食鋼板の残存圧縮強度評価に関わる実験・有限要素解析。 （発明者:藤井堅，中村秀治，海田辰将）

池田裕幸：平成21年度　土木学会四国支部技術研究発表会　優秀発表賞 糸川和樹：平成22年度　土木学会四国支部技術研究発表会　優秀発表賞 中澤晃治：平成23年度　土木学会中国支部優秀卒業生表彰 中澤晃治：平成23年度　優秀卒業研究賞 屬　美緒：平成25年度　第19回日本高専学会年会　優秀ポスター発表賞 光永知央：平成26年度　優秀卒業研究賞 光永知央：平成27年度　土木学会全国大会第70回年次学術講演会　優秀講演者表彰 山根達郎：平成28年度　第68回土木学会中国支部研究発表会　若手優秀発表者賞 小山諒子：平成29年度　第69回土木学会中国支部研究発表会　若手優秀発表者賞 山根達郎：平成30年度　第70回土木学会中国支部研究発表会　若手優秀発表者賞 山根達郎：平成30年度　土木学会全国大会第73回年次学術講演会　優秀講演者表彰 小山諒子：平成29年度　第1回インフラメンテナンス大賞　国土交通大臣賞「しゅうニャン橋守隊（CATS-B）による猫の手メンテナンス活動」 小山諒子：平成29年度　土木鋼構造研究会総会基調講演講師 小山諒子：平成29年度　独立行政法人国立高等専門学校機構学生表彰　理事長表彰

第Ⅰ編 第4章（はりとは） 海田辰将

第Ⅱ編4.2（三篠川の橋調査） 海田辰将

第8章（応力とひずみ） 海田辰将

Chapter 6(coauthor): Remaining fatigue life estimation of existing railway bridges KAITA Tatsumasa

第２章（計測），第４章（座屈挙動） 海田辰将

Teranishi, S., Kaita, T., Yamane, T., Kawami, S. and Fujii, K.

Fujinaga, R., Kaita, T., Koyama, R., and Imai, T

Koyama, R, Kaita, T, Yamane, T, Imai, T

Yamane, T, Kaita, T, Fukuda, H, Kawami, S, Satake, R. Hirahara, Y, Kanou, T, Fujii, K

Kawami, S, Kaita, T, Yamane, T, Fukuda, H, Satake, R, Hirahara, Y, Kanou, T, Fujii, K

Kanou, T, Kaita, T, Kawami, S, Hirahara, Y, Yamane, T, Fukuda, H, Satake, R, Fujii, K

Hirahara, Y, Kawami, S, Kaita, T, Kanou, T, Fukuda, H, Yamane, T, Satake, R, Fujii, K

川見周平, 海田辰将, 加納匠, 平原義之, 福田洋顕, 山根達郎, 佐竹亮一, 藤井堅

Koyama, R, Kaita, T, Yamane, T, Kaneshige, K, Imai, T

Nakahara, K, Kaita, T, Okumoto, M

Yamane, T, Kaita, T, Fujii, K

Kaita, T, Mitsunaga, T

藤井堅, 中村秀治, 山口詩織, 海田辰将, 須藤仁, 服部康男, 石川智巳

近藤拓也, 横井克則, 海田辰将, 細居清剛

Mitsunaga, T, Kaita, T, Fujii, K

Kaita, T, Goto, S, Yamanaka, T, Sakka, M

Kaita, T, Shimabukuro, A, Tamura, T

佐賀孝徳, 上俊二, 橋本堅一, 田村隆弘, 渡辺勝利, 桑嶋啓治, 島袋淳, 海田辰将, 福田靖

This paper presents remaining strength of riveted joint, where single and double shear tests of rivets are conducted through the tensile tests of the joint. The test specimens are taken out from an old bridge used for about 100 years. And material properties of the steel plates as well as the rivets are also examined through sulphur print, microscopic examinations and chemical composition analysis. From the tests, it is clarified that the old steel plate and rivets have a lot of internal defects such as MnS different from present steel, however they have sufficient performance such like mild steel. And it is concluded that remaining joint strength does not decrease even if 75% loss of the rivet head occurs by corrosion. R. Satake, K. Fujii, N. Kosako, T. Kaita

全邦釘, 池田裕幸, 海田辰将, 古川清司, 大賀水田生

The potential for structural capability degrading effects caused by corrosion is of profound importance and must be both fully understood and reflected in bridge inspection and maintenance programs. As the number of steel bridge infrastructures increases throughout the world, it is an exigent task to conduct regular and detailed corrosion surface investigations to evaluate their residual strength capacities and to develop analytical models to understand their current conditions and critical locations, as well as yield and ultimate behaviors. This paper presents a simple, accurate, and rapid assessment method and an effective maintenance management strategy developed by using the results of tensile coupon tests conducted on numerous corroded plates obtained from a steel plate girder used for about 100 years with severe corrosion and an finite element method (FEM) analytical approach proposed by measuring only the maximum corroded depth, which can be used to make reliable decisions affecting cost and safety. (C) 2013 American Society of Civil Engineers. J. M. R. S. Appuhamy, M. Ohga, T. Kaita, P. Chun, P. B. R. Dissanayake

佐竹亮一, 藤井堅, 小迫伸聡, 山下泰勲, 海田辰将

In this study, for severely corroded steel members, the reliability of thickness measurement method using the portable ultrasonic thickness gauge (UTG) to on-site measurement in steel bridge maintenance was investigated from the comparison of laser displacement gauge method. In the field measurement using UTG, the thickness loss will occur depending on surface roughness before measurement, because the smoothing work around measuring points must be certainly needed for the normal contact of ultrasonic probe with steel surface. So, the relationship the thickness loss and roughness was investigated in this study. In UTG method, the concept of unitized measuring points (a square unit with 5 measuring points) was used in consideration of a reasonable on-site measurement. The main conclusions are as follows (1) The average thickness obtained from UTG method will be overestimated than that of facts, (2) A calculation formula for effective thickness was proposed based on the concept of safe strength estimation. Tatsumasa Kaita, Hiroki Nishioka, Yasuki Sugiyama, Koji Nakazawa, Katashi Fujii

Appuhamy, J.M.R.S, Ohga, M, Kaita, T, Chun, P, Dissanayake, P.B.R

Appuhamy, J.M.R.S, Ohga, M, Kaita, T, Chun, P, Fujii, K, Dissanayake, P.B.R

Appuhamy, J.M.R.S, Ohga, M, Kaita, T, Chun, P, Dissanayake, P.B.R

目山直樹, 大成博文, 上俊二, 佐賀孝徳, 渡辺勝利, 海田辰将

藤井堅, 海田辰将, 佐竹亮一, 時乗良彦

Many steel bridge infrastructures in the world are getting older, and a large number of these structures are in need of maintenance, rehabilitation or replacement. Most of them are subjected to corrosion due to exposure to aggressive environmental conditions and inadequate maintenance, causing reduction of their carrying capacities. In order to have an adequate bridge management, it is of paramount importance to develop an efficient, accurate and rapid condition assessment method which can be used to make reliable decisions affecting the cost and safety. Therefore, a simple and accurate method of calculating remaining yield and tensile strength by using a concept of representative effective thickness with correlation of initial thickness and maximum corroded depth is proposed in this study, based on the results of many tensile coupon tests of corroded plates obtained from a steel plate girder with severe corrosion, used for about 100 years. Furthermore, a strength reduction diagram which will be very useful for bridge inspection engineers to make rational decisions about the maintenance management of aged steel bridge infrastructures is presented. Copyright ? 2012 Techno Press. Tatsumasa Kaita, J.M. Ruwan S. Appuhamy, Mitao Ohga, Katashi Fujii

Appuhamy, J.M.R.S, Ohga, M, Kaita, T, Chun, P, Dissanayake, P.B.R

Ohga, M, Appuhamy, J.M.R.S, Kaita, T, Chun, P, Dissanayake, P.B.R

Appuhamy, J.M.R.S, Ohga, M, Kaita, T, Chun, P, Fujii, K, Dissanayake, P.B.R

Kaita, T, Appuhamy, J.M.R.S, Ohga, M, Fujii, K

Appuhamy, J.M.R.S, Ohga, M, Kaita, T, Dissanayake, P.B.R

Recently, the damage due to deterioration of materials in many old steel bridge structures, which causes unavoidable strength reduction, is becoming a serious problem in Japan and all over the world. Therefore the remaining load-carrying capacities must be carefully evaluated in order to understand the feasibility of those steel structures for the current usage and to evaluate the necessity of retrofitting of selected corroded members to strengthen the existing structure. This paper proposes a new method to calculate the remaining yield and tensile strengths by using a concept of representative effective thickness (t(eff)) with the correlation of initial thickness (t(0)) and the maximum corroded depth (t(c,max)), based on the results of many tensile coupon tests of actual corroded plates. Further, the feasibility of establishing of an analytical methodology to predict the residual strength capacities of a corroded steel member with fewer: number of measuring points is also discussed. J. M. R. S. Appuhamy, T. Kaita, M. Ohga, K. Fujii

The maintenance and safety of the existing bridges is an important concern of all highway and railroads. To assure adequate safety and determine the ongoing maintenance needs, thorough regular inspections are required. These inspections should form the essential source of information for carrying out a comprehensive evaluation of its current capacity. But the number of steel bridge infrastructures in the world is steadily increasing as a result of building new steel structures and extending the life of older structures. Most of these structures are subjected to corrosion due to environmental exposure which can reduce their carrying capacities. So, there is a need of more brisk and accurate assessment method which can be used to make reliable decisions affecting the cost and safety. In modern practices, numerical simulation is being used to replace the time-consuming and expensive experimental work and to comprehend on the lack of knowledge of mechanical behavior, stress distribution, ultimate behavior and so on. Therefore, using of numerical analysis method will give important knowledge not only for the strength estimation but also for subsequent repair and retrofitting plan. This paper presents the results of non-linear FEM analyses and compares them with their respective tensile tests of corroded plates which are obtained from a steel plate girder used for about 100 years with severe corrosion condition. Further, the effect of number of measuring points on the remaining strength estimation is studied to establish an analytical methodology to predict the residual strength capacities of a corroded steel member by measuring lesser number of points with an acceptable accuracy level. (C) 2011 Published by Elsevier Ltd. J. M. R. S. Appuhamy, T. Kaita, M. Ohga, K. Fujii

The maintenance and safety of the existing bridges is an important concern of all highway and railroads. To assure adequate safety and determine the ongoing maintenance needs, thorough regular inspections are required. These inspections should form the essential source of information for carrying out a comprehensive evaluation of its current capacity. But the number of steel bridge infrastructures in the world is steadily increasing as a result of building new steel structures and extending the life of older structures. Most of these structures are subjected to corrosion due to environmental exposure which can reduce their carrying capacities. So, there is a need of more brisk and accurate assessment method which can be used to make reliable decisions affecting the cost and safety. In modern practices, numerical simulation is being used to replace the time-consuming and expensive experimental work and to comprehend on the lack of knowledge of mechanical behavior, stress distribution, ultimate behavior and so on. Therefore, using of numerical analysis method will give important knowledge not only for the strength estimation but also for subsequent repair and retrofitting plan. This paper presents the results of non-linear FEM analyses and compares them with their respective tensile tests of corroded plates which are obtained from a steel plate girder used for about 100 years with severe corrosion condition. Further, the effect of number of measuring points on the remaining strength estimation is studied to establish an analytical methodology to predict the residual strength capacities of a corroded steel member by measuring lesser number of points with an acceptable accuracy level. (C) 2011 Published by Elsevier Ltd. J. M. R. S. Appuhamy, T. Kaita, M. Ohga, K. Fujii

Bridge infrastructure maintenance and assurance of adequate safety is of paramount importance in transportation engineering and maintenance management industry. Corrosion causes strength deterioration, leading to impairment of its operation and progressive weakening of the structure. Since the actual corroded surfaces are different from each other, only experimental approach is not enough to estimate the remaining strength of corroded members. However, in modern practices, numerical simulation is being used to replace the time-consuming and expensive experimental work and to comprehend on the lack of knowledge on mechanical behavior, stress distribution, ultimate behavior, and so on. This paper presents the nonlinear FEM analyses results of many corroded steel plates and compares them with their respective tensile coupon tests. Further, the feasibility of establishing an accurate analytical methodology to predict the residual strength capacities of a corroded steel member with lesser number of measuring points is also discussed. ? 2011 J. M. R. S. Appuhamy et al. J. M.R.S. Appuhamy, M. Ohga, T. Kaita, K. Fujii, P. B.R. Dissanayake

Corrosion is one of the most important causes of deterioration of steel girder bridges which affects their long term mechanical performance, usability and durability. Lack of information on yield and ultimate behavior of corroded tensile members make it a difficult task for the civil engineers to evaluate their remaining strength which eventually accounts for the estimation of useful service life, decisions on necessary retrofit or replacements to promote public safety. In the past, many experimental studies were done on corroded coupon specimens such as JIS No. 5 with about 30mm width, in clarifying the influence of corrosion on the remaining strength. However in actual corrosion conditions, severe corrosion damages with large corrosion pits exceeding 30mm in diameter are observed in aged steel bridges. Therefore the existing coupon specimens would not reflect the actual effects of corrosion in their corresponding tensile tests. A more accurate method of remaining strength estimation for the corroded tensile plates based on the experimental results of tensile tests conducted on 26 specimens having different corrosion conditions and wide widths of 70-180 mm is presented in this paper. These results divulged the importance and possibility of using of a representative effective thickness parameter on estimating the residual yield and tensile strengths of corroded steel plates with more accuracy. Therefore, two approaches to estimate the remaining yield and tensile strength of corroded steel plates are proposed by considering the statistical parameters such as initial thickness, standard deviation of thickness etc., which represents the condition of corrosion surface. The proposed methods revealed more accurate and reliable estimation for the maintenance management of existing corroded steel structures. (C) 2011 Published by Elsevier Ltd. T. Kaita, J. M. R. S. Appuhamy, K. Itogawa, M. Ohga, K. Fujii

Corrosion is one of the most important causes of deterioration of steel girder bridges which affects their long term mechanical performance, usability and durability. Lack of information on yield and ultimate behavior of corroded tensile members make it a difficult task for the civil engineers to evaluate their remaining strength which eventually accounts for the estimation of useful service life, decisions on necessary retrofit or replacements to promote public safety. In the past, many experimental studies were done on corroded coupon specimens such as JIS No. 5 with about 30mm width, in clarifying the influence of corrosion on the remaining strength. However in actual corrosion conditions, severe corrosion damages with large corrosion pits exceeding 30mm in diameter are observed in aged steel bridges. Therefore the existing coupon specimens would not reflect the actual effects of corrosion in their corresponding tensile tests. A more accurate method of remaining strength estimation for the corroded tensile plates based on the experimental results of tensile tests conducted on 26 specimens having different corrosion conditions and wide widths of 70-180 mm is presented in this paper. These results divulged the importance and possibility of using of a representative effective thickness parameter on estimating the residual yield and tensile strengths of corroded steel plates with more accuracy. Therefore, two approaches to estimate the remaining yield and tensile strength of corroded steel plates are proposed by considering the statistical parameters such as initial thickness, standard deviation of thickness etc., which represents the condition of corrosion surface. The proposed methods revealed more accurate and reliable estimation for the maintenance management of existing corroded steel structures. (C) 2011 Published by Elsevier Ltd. T. Kaita, J. M. R. S. Appuhamy, K. Itogawa, M. Ohga, K. Fujii

Ohga, M, J.M.R.S. Appuhamy, Kaita, T, Fujii, K, P.B.R. Dissanayake

S. Siriwardane, M. Ohga, T. Kaita, R. Dissanayake

Ohga, M, Appuhamy, J.M.R.S, Kaita, T, Fujii, K, Dissanayake, P.B.R

Ohga, M, J.M.R.S. Appuhamy, Kaita, T, Fujii, K, P.B.R. Dissanayake

J.M.R.S. Appuhamy, Kaita, T, Ohga, M, Fujii, K, P.B.R. Dissanayake

J.M.R.S. Appuhamy, Ohga, M, Kaita, T, Fujii, K

The current fatigue life estimation methods of railway bridges are generally based on combinations of measured strain histories, Miner's rule, and railway code provided fatigue curve. Even though the past measured strain histories are available for major bridges, most of the old bridges do not have past strain measurements. Furthermore, in case of existing railway bridges where the detailed loading history is known, Miner's rule might provide incorrect results because of its omission of load sequence effect. These reasons hinder the usage of current methods to estimate the realistic remaining fatigue life of most of the existing railway bridges. Therefore, a new method is presented in this article to estimate remaining fatigue life of riveted railway bridges. The method mainly consists of predicted stress histories, recently developed sequential law and fully known Wohler curve. Here, it is essential to use the fully known Wohler curve as the related fatigue curve. Hence, the technique, which utilizes transfer of the partially known Wohler curve to fully known curve, is also discussed in this article. Further, this method describes a reasonably accurate procedure to obtain the past stress histories from present day measured strains. Initially, the article describes the proposed method for remaining fatigue life estimation. Then the sequential law and associated fully known S-N curve determination procedure are verified by comparing theoretical fatigue life, damage behavior with real fatigue life and damage behavior of few materials. Finally, the remaining fatigue life of an existing railway bridge is estimated. Hence, validity and merits of the proposed method is confirmed by comparing the results with previous method-based fatigue lives. S. A. S. C. Siriwardane, M. Ohga, P. B. R. Dissanayake, T. Kaita

Kaita, T, Ikeda, H, J.M.R.S. Appuhamy, Ohga, M, Fujii, K

J.M.R.S. Appuhamy, Kaita, T, Ohga, M, Fujii, K, P.B.R. Dissanayake

This paper presents a reliability-based condition assessment procedure of multispan masonry arch bridges. Considering axle load as assessment criterion, safety margins (limit state functions) are introduced for each arch of the bridge. The introduced safety margins consist of two variables: provisional axle load (PAL) which is estimated using MEXE methods and actual axle load (AAL) which is estimated using weigh-in-motion measurements of the bridge. Both variables are assumed to follow log normal distribution. Then, failure probabilities of each arch which were estimated from statistical parameters of variables are combined to get the failure probability of the bridge using reliability bounds. The reliability index of the bridge is estimated from the failure probability. Bridge condition is predicted by comparing the reliability index with its acceptable reliability index. Further, when the statistical parameters behave as interval numbers, corresponding reliability index changes are discussed. The introduced assessment procedure is illustrated by a four span brick masonry arch bridge in Sri Lanka. ? 2010 - IOS Press and the authors. All rights reserved. Kamal Karunananda, Mitao Ohga, Tatsumasa Kaita, P.B. Ranjith Dissanayake

Sudath Siriwardane Chaminda, Mitao Ohga, Ranjith Dissanayake, Tatsumasa Kaita

Kaita, T, J.M.R.S. Appuhamy, Fujii, K, Ohga, M

J.M.R.S. Appuhamy, Kaita,T. Ohga, M, P. B.R. Dissanayake

S. C. Siriwardane, Ohga, M, R. Dissanayake, Kaita, T

J.M.R.S. Appuhamy, Ohga, M, Kaita, T, S. Tinti, R. Dissanayake

Ohga, M, S. C. Siriwardane, R. Dissanayake, Kaita, T

Kaita, T, Kawasaki, Y, Isami, H, Ohga, M, Fujii, K

S.A.S.C. Siriwardane, M. Ohga, P. B.R. Dissanayake, T. Kaita

Ohga, M, S. C. Siriwardane, R. Dissanayake, Kaita, T

Ohga, M, K. Karunananda, R. Dissanayake, Kaita, T

A.M.N.D. Adasooriya, S.A.S.C. Siriwardane, M.Ohga, T.Kaita, P.B.R.Dissanayake

S.A.S.C. Siriwardane, M.Ohga, T.Kaita, P.B.R.Dissanayake

Ohga, M, K. Karunananda, R. Dissanayake, Kaita, T

Ohga, M, S. C. Siriwardane, R. Dissanayake, Kaita, T

武内秀樹, 吉田正伸, 西内悠祐, 秦隆志, 海田辰将, 後藤章, 秦泉寺俊弘, 高木和久, 堀佳城, 大野三徳, 前田公夫

田中豪, 勇秀憲, 海田辰将

海田辰将, 藤井堅, 勇秀憲, 長瀬竜一

Kaita, T, Isami, H, Fujii, K, Nagase, R

Kaita, T, Isami, H, Tagaya, K, Fujii, K, Kuboura, H

Yamamoto, O, Fujii, K, Kaita, T

Kaita, T, Fujii, K, Miyashita, M, Uenoya, M, Tagaya, K

Tagaya, K, Kariya, A, Kaita, T, Fujii, K, Hara, T, Uenoya, M

Kariya, A, Tagaya, K, Kaita, T, Fujii, K

海田辰将, 藤井堅, 宮下雅史, 上野谷実, 中村秀治

海田辰将, 藤井堅, 中村秀治

藤井堅, 海田辰将, 中村秀治, 有尾一郎

海田辰将

海田辰将, 藤井堅, 原考志, 中村秀治

Fujii, K, Kaita, T, Nakamura, H, Okumura, M

Nakamura, H, Fujii, K, Ishikawa, T, Kaita, T

藤井堅, 原考志, 海田辰将, 上野谷実, 有尾一郎

Hara, T, Fujii, K, Kaita, T, Nakamura, H

中村秀治, 藤井堅, 石川智己, 海田辰将

For proper maintenance to occur, it is very important to establish a reliable strength estimation method for corroded steel structures. In this study, non-linear FEM analyses were performed parametrically for corroded compressive flanges without eccentricity. Using the results, an accurate and simple estimation method was proposed. A plate surface is generated by using the spatial auto-correlation method. The following conclusions can be drawn from the FEM analyses: (1) The ultimate strength of a corroded plate can be estimated by the representative thickness t = t(avg) + 2sigma(st) without concerning its irregularity, where t(avg) = average thickness, and sigma(st) = standard deviation of plate thicknesses. (2) When the standard deviation of plate thicknesses is large, such as sigma(st) = 1.0 mm, the ultimate strength may become larger than that of a plate without corrosion. Kaita, I, K Fujii

This paper presents a measuring method of surface irregularities for reliable strength estimation of corroded steel bridges, and statistical characteristics and shear behavior of corroded plate girder. A specimen was made of a part at the vicinity of a support of a scrapped bridge having been used for more than a hundred years. For measuring surface irregularities, we adopted, as a new trial, the portable 3-dimensional scanning system, which can provide the accurate 3-dimensional coordinate values of corroded surface. From the experimental study, the following conclusions can be drawn: (1) Shear behavior and strength of plate girder with overall corrosion would be able to predict by using average thickness. (2) Thicknesses of corroded plate girder can be obtained easily from surface irregularities measured by portable 3-dimensional scanning system. T Kaita, Hara, I, K Fujii, H Nakamura, M Uenoya, K Tagaya

Kaita, T, Fujii, K, Okumura, M

Ario, I, Kaita, T

藤井堅, 海田辰将, 平井勝志, 奥村誠

有尾一郎, 海田辰将

海田辰将, 有尾一郎, 藤井堅

海田辰将

Kaita, T, Fujii, K, Ario, I

有尾一郎, 海田辰将

中村智哉,海田辰将,宮﨑亮一,池田将晃,藤井貴一,藤井堅

藤永りさ,海田辰将,前田唯

寺西冴映,海田辰将,山根達郎,川見周平,藤井堅

有尾一郎, 横谷祐樹, 椿涼太, 濱優太, 渡邊学歩, 柴田俊文, 海田辰将, 河村進一

寺西冴映, 海田辰将, 山根達郎, 藤井堅

藤永りさ, 海田辰将, 小山諒子, 今井努

山根達郎, 福田洋顕, 川見周平, 佐竹亮一, 平原義之, 加納匠, 海田辰将, 藤井堅

小山諒子, 今井努, 山根達郎, 海田辰将

中原啓太, 海田辰将

作本英梨, 海田辰将, 小山諒子, 今井努

中原啓太, 海田辰将

小山諒子, 今井努, 山根達郎, 海田辰将

山根達郎, 福田洋顕, 海田辰将, 藤井堅

加納匠, 川見周平, 平原義之, 佐竹亮一, 海田辰将, 藤井堅

山根達郎, 福田洋顕, 加納匠, 佐竹亮一, 海田辰将, 藤井堅

小山諒子, 西本忠章, 今井努, 岡本知也, 中越亮太, 海田辰将

福田洋顕, 川見周平, 加納匠, 佐竹亮一, 平原義之, 海田辰将

山根達郎, 福田洋顕, 原考志, 佐竹亮一, 海田辰将, 藤井堅

米倉亜州夫, 藤井堅, 海田辰将, 佐竹亮一

安永拓哉, 奥本幸, 中原啓太, 海田辰将

中原啓太, 海田辰将, 奥本幸, 川内康寛

海田辰将, 藤本望月, 河村進一, 大屋誠, 麻生稔彦, 藤井堅, 谷口朋代

山根達郎, 海田辰将, 藤井堅

小山諒子, 海田辰将, 今井努

佐竹亮一, 米倉亜州夫, 藤井堅, 海田辰将

光永知央, 海田辰将, 藤井堅

目山直樹, 原隆, 上俊二, 佐賀孝徳, 橋本堅一, 渡邊勝利, 中川明子, 海田辰将

海田辰将, 後藤悟史, 山中隆寛, 屬 美緒

海田辰将, 後藤悟史, 高橋航貴, 福田友紀

大西史美香, 高橋のりか, 海田辰将, 田村隆弘

西岡祐希, 海田辰将, 藤井堅

属美緒, 福田友紀, 高橋航貴, 海田辰将, 後藤悟史

目山直樹, 上俊二, 渡辺勝利, 海田辰将, 後藤晃徳

目山直樹, 上俊二, 渡辺勝利, 海田辰将, 佐賀孝徳, 橋本堅一

全国高等専門学校 第１回小中学生向理科技術教材開発コンテスト 最優秀賞 この教材は、乾麺パスタ(直径1.8mm）、油粘土、専用の台紙を用いて、台紙上の直径200mmの円の範囲内に建てるタワーモデルです。台紙上には目盛を設け、パスタや粘土の長さや大きさ・形状を手作業で自在に変えることができるため、刃物を使わず、誰でも安全かつ手軽に製作することが可能です。建物や部材の座屈・破断・曲げ・押抜きといった破壊現象を再現できるため、力のかかり方が目で見てわかります。 教材 海田辰将

目山直樹, 上俊二, 佐賀孝徳, 渡辺勝利, 海田辰将, 岡村知季, 渋田憲治

西岡裕希, 海田辰将, 藤井堅

Appuhamy, J.M.R.S, Ohga, M, Chun, P, Kaita, T

中塚萌, 海田辰将, 藤井堅

中澤晃治, 海田辰将, 杉山泰基, 藤井堅

Appuhamy, J.M.R.S, Ohga, M, Chun, P, Kaita, T

中塚 萌, 海田辰将, 藤井 堅

中澤晃治, 海田辰将, 杉山泰基, 藤井 堅

糸川和樹, 大賀水田生, 海田辰将, 池田裕幸

J.M.R.S. Appuhamy, Ohga, M, Kaita, T, Fujii, K

海田辰将, 糸川和樹, 池田裕幸, 大賀水田生, 藤井 堅

糸川和樹, 大賀水田生, 海田辰将, 池田裕幸

桑山大輔, 海田辰将, 丹野航, 大賀水田生

SYPHAVANH, SONGKEO, 勇秀憲, 海田辰将

上杉直寛, 勇秀憲, 海田辰将, 藤井堅

池田裕幸, 海田辰将, 大賀水田生, 藤井堅

K. Karunananda, Ohga, M, Kaita, T

S. C. Siriwardane,Ohga, M. kaita, T

池田裕幸, 海田辰将, 大賀水田生, 藤井堅

上杉直寛, 勇秀憲, 海田辰将, 藤井堅

田邊靖博, 海田辰将, 大賀水田生, 勇秀憲

海田辰将, 川﨑雄太, 勇秀憲, 大賀水田生

S.C.Siriwardane, Ohga, M, Kaita, T

Santosh Shrestha, Ohga, M, Kuwayama D, Kaita, T

P.K. Kamal, Karunananda, Ohga, M, Kaita, T

A.M.N.D, Adasooriya, Ohga, M, Kaita, T

勇秀憲, 海田辰将, 刈谷聡志, 熊崎幸典

川﨑雄太, 海田辰将, 勇秀憲, 藤原章光

近藤孝樹, 海田辰将, 勇秀憲, 射手七都姫

田邊靖博, 海田辰将, 勇秀憲, 田中豪

海田辰将, 山下恭平, 勇秀憲

清岡直樹, 海田辰将, 勇秀憲

田中豪, 勇秀憲, 海田辰将

清岡直樹, 海田辰将, 勇秀憲

山下恭平, 海田辰将, 勇秀憲

田邊靖博, 海田辰将, 勇秀憲, 田中豪将

片岡恵太, 海田辰将, 勇秀憲

田中豪, 勇秀憲, 海田辰将

近森靖弘, 勇秀憲, 海田辰将

濱岡奈央, 海田辰将, 春海旭

北川雄也, 海田辰将

海田辰将, 久保浦大貴, 刈谷秋人, 藤井堅

山本治, 藤井堅, 中村秀治, 海田辰将

長瀬竜一, 海田辰将, 藤井堅, 刈谷秋人

海田辰将, 久保浦大貴, 刈谷秋人

田淵正浩, 海田辰将, 中村秀治

長瀬竜一, 海田辰将, 刈谷秋人

海田辰将, 藤井堅, 中村秀治

宮下雅史, 藤井堅, 海田辰将, 上野谷実

刈谷秋人, 多賀谷宏三, 海田辰将

海田辰将, レンイエン, 多賀谷宏三, 藤井堅

海田辰将, 藤井堅, 多賀谷宏三, 刈谷秋人

山本治, 藤井堅, 海田辰将

宮下雅史, 藤井堅, 海田辰将, 上野谷実

刈谷秋人, 多賀谷宏三, 海田辰将, 藤井堅

レンイエン, 多賀谷宏三, 海田辰将, 藤井堅

海田辰将, 藤井堅, 中村秀治

海田辰将, 藤井堅, 中村秀治

原考志, 海田辰将, 藤井堅, 上野谷実, 中村雅樹

原考志, 藤井堅, 海田辰将, 中村秀治, 多賀谷宏三

刈谷秋人, 多賀谷宏三, 海田辰将

刈谷秋人, 多賀谷宏三, 海田辰将, 藤井堅

海田辰将, 藤井堅

有尾一郎, 海田辰将

海田辰将, 藤井堅

海田辰将, 有尾一郎, 藤井堅

海田辰将, 有尾一郎, 藤井堅

海田辰将, 有尾一郎, 佐藤誠

海田辰将, 有尾一郎, 佐藤誠

平成22年度：審査員特別賞「らち☆すた」 中塚萌，中澤晃治，杉山泰基，原田高嘉，小林志海，澄岡ほのか 平成23年度：審査員特別賞「麒麟」 中塚萌，小林志海，田中幹基，澄岡ほのか，小山諒子，志賀菜帆 平成26年度：優秀賞（第2位）「百折不塔」 丸山直也，小山諒子，中嶋泰史，徳重茜 平成27年度：優秀賞（第2位）「繊月」 丸山直也，加納萌里，佐々木日菜，田辺萌絵，貞本侑香里，中村智哉 平成27年度：優秀賞（第3位）「美環」 小山諒子，志賀菜帆，川崎泰奈，寺西冴映，德重茜，山本真奈美 平成28年度：優秀賞（第2位）「結美弦」 山根達郎，加納萌里，佐々木日菜，寺西冴映，貞本侑香里，山本真奈美 平成28年度：日刊建設工業新聞社賞（第4位）「透ヶ織」 小山諒子，横屋翔，徳重茜，藤永りさ，中村智哉，裏谷万葉 平成29年度：最優秀賞（第1位）「紡希」 小山諒子，藤永りさ，横屋翔，中村智哉，河村篤志，角井夕莉 平成30年度：審査員特別賞（第4位）「国士夢想」 貞本侑香里，河村篤志，西川侑華，丸岡紗也，稲田透直，内冨駿仁 令和1年度：審査員特別賞（第7位）「双穹」 河村篤志，西川侑華，貞本舞，高木拓海，元永真菜，長谷川京香 海田 辰将

中澤晃治：平成23年度 公益社団法人 土木学会中国支部 優秀学生表彰 中塚萌，杉山泰基，西岡祐希，高橋のりか，福田友紀，高橋航貴： 平成25年度 全国高等専門学校 第１回小中学生向理科技術教材開発コンテスト 最優秀賞 「チャレンジ！ザ・トラスタワー」 小山諒子（他5名）：平成29年度 第1回インフラメンテナンス大賞 国土交通大臣賞 「しゅうニャン橋守隊（CATS-B）による猫の手メンテナンス活動」 小山諒子：平成29年度 独立行政法人国立高等専門学校機構学生表彰 理事長表彰 小山諒子，藤永りさ，横屋翔，中村智哉，河村篤志，角井夕莉： 平成29年度：山口県 後期メダル栄光（文化賞） 作本英梨：平成29年度 公益社団法人土木学会中国支部 優秀学生表彰 水津佑太，橋本菜帆，守本愛弓，広中翔，佐村桃香，田中美裕： 平成30年度 「KOJICHUプロジェクト 仮囲いデザインアイデアコンテスト」 入選 （主催：全国建設業協同組合連合会） 「街に花が咲く－工事現場を華やかに彩る仮囲い－ 花×華×栄成」 藤永りさ：平成30年度 公益社団法人 土木学会中国支部 優秀学生表彰 藤永りさ：平成30年度 公益社団法人 土木学会 教育企画・人材育成委員会 高等専門教育小委員会 土木教育賞 山本真奈美：令和元年度 公益社団法人 土木学会中国支部 優秀学生表彰 河村篤志：令和元年度 公益社団法人 土木学会 教育企画・人材育成委員会 高等専門教育小委員会 土木教育賞 海田 辰将

池田裕幸：平成21年度 土木学会四国支部技術研究発表会 優秀発表賞 糸川和樹：平成22年度 土木学会四国支部技術研究発表会 優秀発表賞 中澤晃治：平成23年度 優秀卒業研究賞 屬 美緒：平成25年度 第19回日本高専学会年会 優秀ポスター発表賞 光永知央：平成26年度 優秀卒業研究賞 光永知央：平成27年度 土木学会全国大会第70回年次学術講演会 優秀講演者表彰 山根達郎：平成28年度 第68回土木学会中国支部研究発表会 若手優秀発表者賞 小山諒子：平成29年度 第69回土木学会中国支部研究発表会 若手優秀発表者賞 山根達郎：平成30年度 第70回土木学会中国支部研究発表会 若手優秀発表者賞 山根達郎：平成30年度 土木学会全国大会第73回年次学術講演会 優秀講演者表彰 藤永りさ：平成30年度 優秀卒業研究賞 寺西冴映：令和元年度 第71回土木学会中国支部研究発表会 若手優秀発表者賞 山本真奈美：令和元年度 優秀卒業研究賞 海田 辰将