研究者詳細 - 高井　俊和

論文 - 高井　俊和

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連結板そりを有する高力ボルト摩擦接合継手におけるボルト本数と板厚がすべり挙動評価に与える影響査読有り

工藤志穏，杉本悠真，内田大介，村上貴紀，高井俊和，田村洋，吉見正頼

構造工学論文集A 71A 389 - 401 2025年03月

Numerical Analysis of the Load-carrying Capacity of Built-up Columns with Damaged or Missing Lacing Bars 査読有り国際誌

Takai T., Furuichi T., Miyoshi T., Iwatsubo K., Tamada K., Morimoto K.

Pertanika Journal of Science and Technology 33 ( spl2 ) 13 - 25 2025年02月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Built-up columns with lacing bars are commonly used in old bridges. Typically, these columns consist of shaped steel members connected by riveted lacing bars. This design held the advantage of reducing steel usage, thereby lowering costs. However, these techniques have become outdated. Nevertheless, structures constructed using these methods persist today. Over time, some of these columns have experienced component loss because of ageing, damage, or corrosion. This study uses finite element analysis to determine the load-carrying capacity of built-up columns with lacing bars subjected to compressive forces. The results indicate that the loss of some lacing bars results in a 2% reduction in load-carrying capacity, while the loss of both lacing bars and rivets leads to a 5% reduction. Though the reduction may appear marginal, the presence or absence of lacing bars and rivets becomes a significant consideration in estimating the remaining load-carrying capacity. The results of this study have implications with respect to the ongoing use and maintenance of built-up columns with missing components, which has emerged as a critical concern.

DOI： 10.47836/pjst.33.S2.02

Scopus

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LMS法を用いた耐候性鋼材のさび厚の測定回数と精度に関する検討

伊藤渚生，高井俊和，名木野晴暢，安井賢太郎

第12回九州橋梁・構造工学研究会シンポジウム論文集 7 - 11 2024年12月

高力ボルト当て板補修部の降伏荷重におけるひずみ速度の影響に関する数値解析的検討

堤風統，高井俊和

第12回九州橋梁・構造工学研究会シンポジウム論文集 34 - 39 2024年12月

ボルトを千鳥配置した高力ボルト継手の終局時の塑性変形に関する解析的検討

香戸瞭太朗，高井俊和

第12回九州橋梁・構造工学研究会シンポジウム論文集 52 - 57 2024年12月

高力ボルト摩擦接合継手の終局挙動における材料特性のばらつきの影響

増留蒼太，高井俊和

第12回九州橋梁・構造工学研究会シンポジウム論文集 76 - 81 2024年12月

連結板の板そりが高力ボルト摩擦接合継手のすべり耐力評価に与える影響査読有り

工藤志穏，杉本悠真，高井俊和

鋼構造年次論文報告集 ( 日本鋼構造協会 ) 32 616 - 624 2024年11月

Surface Roughness Evaluation of Blast-Cleaned Structural Steel Plates Considering Measurement Deviation 査読有り国際誌

Takai T; Morimoto K

International Journal of Steel Structure 24 ( 6 ) 1 - 10 2024年10月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Surface roughness is an important characteristic of blast-cleaned structural steel plates. This is because the adhesion of the coating and the frictional grip of the bolted connections are related to surface roughness. Surface roughness is usually measured using a surface roughness meter. Because the roughness of blast-cleaned surfaces is not uniform, it varies from position to position. The surface roughness test results obtained from a broad area are more valuable than those obtained from a narrow area. Because the measured values contain deviations, they are measured multiple times and averaged to reduce the influence of deviations. However, to evaluate roughness, it is necessary to clarify the measurement conditions to obtain accurate results. Consider combining these sentences as follows: In this study, the surface roughness of the blast-cleaned structural steel sample was measured at multiple locations to obtain its distribution characteristics. During each sample measurement, the detection sensor of the surface roughness meter was lifted and placed on the steel sample to determine deviations from the actual results. The surface roughness distributions of five blast-cleaned samples were the same under the identical measurement conditions. This indicates that accurate results can be obtained by measuring representative samples, without the need for measuring all samples; actually, 17 measurements were adequate to obtain a mean surface roughness value with a 95% confidence level and a 5% acceptable error rate.

DOI： 10.1007/s13296-024-00907-7

Scopus

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Incremental repair method for corroded bolted connection 査読有り国際誌

Yamaguchi E., Tamada N., Agvaanluvsan U., Takai T., Wada M.

Bridge Maintenance, Safety, Management, Digitalization and Sustainability - Proceedings of the 12th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2024 4027 - 4032 2024年06月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

For the repair work of a corroded bolted connection, common practice is to use temporary bents or a bypass member over the connection. The costs of these methods are quite high and the traffic needs be regulated. The present study explores a repair method that requires no bents, no bypass member and no traffic regulation. The method is to conduct repair in an incremental fashion: the repair work proceeds gradually, part by part. Its validity is investigated by FEA. For the best accuracy, a bolt is to be modelled by 3-D solid elements, but the computational cost is very high. The employment of connector elements is therefore tried and its effectiveness is confirmed by the comparison with the results of solid element ana-lysis and experiment, using a small connection model. The proposed method is then applied to a 4×23 bolted connection. The validity is verified by FEA with connector elements.

DOI： 10.1201/9781003483755-475

Scopus

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Energy absorption of bolted connection up to tensile ultimate state 査読有り国際誌

Takai T., Tanii K., Masudome S.

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The tensile resistance of the main plate of a bolted connection is reduced by making bolt holes. The structures are sometimes exposed to excessive forces, such as earthquake action. The resistance and energy absorption are important performances against such forces. High energy absorption can realize a ductile structure. However, the energy absorption of the bolted con-nection needs to be clearer because the bolted connection is usually designed based on resistance. In this study, the energy absorption of bolted connections was investigated by a finite element analysis. At first, the numerical model was checked by reproduction analysis of some experiments focused on failure modes and the stress-strain model. A parametric study was conducted to clear the energy absorption. The energy absorption was evaluated and discussed, focusing on the failure modes.

DOI： 10.1201/9781003483755-477

Scopus

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小型の偏心した試験体を用いた高力ボルト摩擦接合継手の曲げ引張に関する基礎的研究

原川進平，高井俊和

第11回・KABSE創立40周年記念九州橋梁・構造工学研究会シンポジウム論文集 87 - 92 2023年12月

ボルト孔を千鳥に配置した小型孔あき板の引張挙動に関する解析的研究

香戸瞭太朗，高井俊和，本間小百合

第11回・KABSE創立40周年記念九州橋梁・構造工学研究会シンポジウム論文集 59 - 64 2023年12月

拡大孔と縮小孔を有する高力ボルト摩擦接合継手の解析的検討

肘井俊介，高井俊和

第11回・KABSE創立40周年記念九州橋梁・構造工学研究会シンポジウム論文集 36 - 41 2023年12月

Retrofit method for repair of corroded bolted connection 査読有り国際誌

Yamaguchi, E., Tamada, N., Agvaanluvsan, U., Takai, T.

Proceedings of the 9th International Conference on Thin-Walled Structures (ICTWS2023) 2023年11月

Energy absorption of bolted patch plate repaired member in ultimate behavior 国際誌

Masudome, S., Takai, T.

Proceedings of the 13th German-Japanese Bridge Symposium (GJBS 2023) 218 - 224 2023年08月

Study on load-carrying capacity of built-up column lost lacing bars focused on buckling mode 国際誌

Morimoto, K., Takai, T., Miyoshi, T., Iwatsubo, K., Tamada, K.

Proceedings of the 13th German-Japanese Bridge Symposium (GJBS 2023) 120 - 128 2023年08月

Mechanical behaviour of bolt replacement of bolted connection in bending and tensile 査読有り国際誌

Takai T., Yamamoto S., Harakawa S.

IABSE Symposium Istanbul 2023: Long Span Bridges - Proceeding Book 1023 - 1029 2023年04月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The component of bolted connection is sometimes replaced due to some reasons, which are corrosion, bolt delayed fracture and so on. The influence or mechanical behaviour of bolt replacement of bolted connection applied tensile force was already investigated in previous studies. However, that of the connection applied the bending moment is not cleared. In this study, simple and small specimens of bolted connection were prepared and bolt replacement experiments under bending were conducted to clear the behaviour and compare it and that of bolted connection applied tensile force. And, numerical analysis was carried out to investigate the influence of bolt replacement focused on the order of bolt replacement. As a result, although the centre opening stretch of the upper side and the lower side was different due to bending, the averaged opening stretch was the same as that of the connection in tensile. The order of bolt replacement affected the opening stretch, however, did not affect the elongation of bolted connection.

DOI： 10.2749/istanbul.2023.1023

Scopus

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Compression strength of aged built-up column with vanished lacing bars 査読有り国際誌

Miyoshi T., Nakakita T., Iwatsubo K., Takai T., Tamada K.

Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems - Proceedings of the 8th International Conference on Structural Engineering, Mechanics and Computation, 2022 950 - 955 2023年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Recently, Japanese aged built-up members have lost their lacing bars due to corrosion. However, the remaining strength of the built-up column with vanished lacing bars has not been clarified yet. In addition, residual stress of channel-shaped steel which consists of built-up columns has not been made sufficiently clear. The authors measured the residual stress distribution of channel-shaped steel, which was removed from an aged steel truss bridge. Moreover, the authors numerically calculated the ultimate behavior of the builtup column with vanished lacing bars using the finite element method. As a result, it is found that the residual stress magnitude of the channel-shaped steel is small compared to that of the welded member, vanishment of lacing bars does not cause a significant reduction of the compression strength and column strength curve given in Japan Specifications for Highway Bridges can be used to estimate its remaining strength conservatively.

DOI： 10.1201/9781003348443-155

Scopus

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レーシングバーが消失した組立柱の耐荷性状査読有り

中来田宰，三好崇夫，岩坪要，高井俊和，玉田和也

鋼構造年次論文報告集 30 767 - 776 2022年11月

FEM解析による高力ボルト継手のエネルギー吸収に関する研究査読有り

谷井健信，高井俊和

鋼構造年次論文報告集 30 728 - 741 2022年11月

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