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Researchers
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HIRAO Kensho
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Tokyo Institute of Technology Doctor Course Completed
Tokyo Institute of Technology Master Course Completed
Doctor of Engineering - Tokyo Institute of Technology
Duty Yokohama National UniversityFaculty of Urban Innovation Division of Urban Innovation Assistant Professor
Japan Society of Civil Engineers
Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Structure engineering and earthquake engineering
Others / Others / Steel structure
First Kind of High School Teacher License
Quantification of Uncertain Influential Parameters Affecting the Structural Performance Evaluation of High Strength Bolted Friction Joints
Kensho HIRAO
2022.9
Doctoral Thesis Single Work [Reviewed]
Experimental Study on the Rotational Loosening Mechanism of High-Strength Bolts under Service
Kensho HIRAO, Hiroshi TAMURA
IABSE Symposium 2025 1 ( 118 ) 2025.5 [Reviewed]
Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IABSE Joint Work
Other Link： https://virtual.oxfordabstracts.com/event/5176/submission/118
Improvement of Positioning Accuracy of Augmented Reality Bridge Inspection Support System
Ryudo KASHIMA, Kensho HIRAO, Hiroshi TAMURA
IABSE Symposium 2025 1 ( 57 ) 2025.5 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IABSE Joint Work
Other Link： https://virtual.oxfordabstracts.com/event/5176/submission/57
Effect of Biaxial Stress State of Steel Members on Leeb Hardness Test Results
Hikaru FUJITA, Hiroshi TAMURA, Kensho HIRAO, Hiroshi KATSUCHI, Jiaqi WANG
IABSE Young Engineers Colloquium 2025.5
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IABSE Joint Work
Experimental Method for Introducing Reversed Cyclic Elastoplastic Strain Histories with Large Amplitude into Structural Steels
Taiji YAMATO, Hiroshi TAMURA, Kensho HIRAO, Jiaqi WANG, Hiroshi KATSUCHI
2024.11 [Reviewed]
Language：Japanese Publishing type：Research paper (research society, symposium materials, etc.) Joint Work
Kensho HIRAO, Quang Vy TRAN, Hiroshi TAMURA
Journal of Structural Engineering 70A ( 0 ) 61 - 74 2024.3 [Reviewed]
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
There is concern that the slip coefficient of high-strength bolted joints with different faying surfaces may be lower than that of conventional joints, and it has been reported that the slip coefficient is improved by inserting friction shims. In this study, shims were modified to be disk-shaped, which can be inserted into each bolt hole, for application to arbitrary bolted joints, and their slip resistance was evaluated by slip resistance tests. As a result, it was confirmed that a slip coefficient of 0.6 or higher could be expected with the insertion of shims. Failure modes of the contact surfaces were also investigated by dismantling the specimens after the test and observing the contact surfaces.
台湾における橋梁現場視察報告(淡江大橋と中正橋)
下村匠，佐々木栄一，平尾賢生
橋梁と基礎 59 ( 2 ) 45 - 48 2025.2
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：株式会社建設図書 Joint Work
Detecting bolts loosening due to nut rotational history using AI image processing
Kensho HIRAO
J-BEC Report 20 24 - 30 2024.11 [Reviewed] [Invited]
Authorship：Lead author Language：Japanese Publishing type：Internal/External technical report, pre-print, etc. Publisher：Japan Bridge Engineering Center Single Work
自己充填コンクリートを用いて製作された実橋におけるプレストレス損失の評価と検証 -アメリカ合衆国ノースカナディアン川に架かる州道4号橋-
中島大樹，平尾 賢生，今村光希，大庭大，桐本 翔平，駒場 駿介，島野 孝則，舟橋 景介，柳 博文，山科盛人
橋梁と基礎 59 ( 5 ) 42 - 44 2025.5
Language：Japanese Publishing type：Book review, literature introduction, etc. Publisher：株式会社建設図書 Joint Work
隣接鉄道への影響を最小限に抑えた旋回構造の斜張橋 -中国 福建省の竜岩大橋-
駒場 駿介，平尾 賢生，倉橋 和希，今村 光希，桐本 翔平，島野 孝則，大庭 大，中島 大樹，舟橋 景介，柳 博文，山科 盛人
橋梁と基礎 59 ( 3 ) 49 - 51 2025.3
Language：Japanese Publishing type：Book review, literature introduction, etc. Joint Work
Asia Steel Bridge Competition 2024
Keigo SUZUKI, Hiroshi TAMURA, Yuki BANNO, Kouichi TAKEYA, Ayako AKUTSU, Kensho HIRAO
Bridge and Foundation Engineering 58 ( 11 ) 56 - 56 2024.11
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Joint Work
2024.10 土木学会 マーカ型ARを用いた橋梁点検支援システムにおける空間重畳精度向上の試み
Individual or group name of awards：平尾 賢生
Best Presentation Award
2024.4 The 70th Symposium on Structural Engineering Evaluation for slip resistance of bolted joints including different contact surfaces with disk-type friction shims inserted
Individual or group name of awards：Kensho HIRAO
鋼部材の当て板補修・補強における省力的設計・施工法の提案
2025.6 - 2027.5
「鋼構造研究・教育助成事業」(土木分野)
Investigator(s)：田村 洋
Authorship：Coinvestigator(s)
Evaluation of Load Carrying Capacity of High-Strength Bolted Joints with Nord-Lock Washers
2024.4 - 2025.3
Private Foundations
Investigator(s)：Kensho HIRAO
Authorship：Principal investigator
Loose bolt detection by nut rotation history using AI image processing
2023.7 - 2024.6
Investigator(s)：Kensho HIRAO
Authorship：Principal investigator
Evaluation of the existing performance of high-strength bolted friction joints considering the effect of uncertainty
2022.6 - 2023.5
Investigator(s)：Kensho HIRAO
Authorship：Principal investigator
Evaluation of the existing performance of high-strength bolted friction joints considering the effect of uncertainty
2021.6 - 2022.5
Investigator(s)：Kensho HIRAO
Authorship：Principal investigator
Experimental Study on the Rotational Loosening Mechanism of High-Strength Bolts under Service
Kensho HIRAO
IABSE Symposium 2025 2025.5 IABSE
Event date： 2025.5
Language：English Presentation type：Oral presentation (general)
Venue：Tokyo Country：Japan
Improvement of Positioning Accuracy of Augmented Reality Bridge Inspection Support System
Ryudo KASHIMA
IABSE Symposium 2025 2025.5 IABSE
Event date： 2025.5
Language：English Presentation type：Oral presentation (general)
Venue：Tokyo Country：Japan
Effect of Biaxial Stress State of Steel Members on Leeb Hardness Test Results
Hikaru FUJITA
IABSE Young Engineers Colloquium East Asia and Germany 2025.5 IABSE Young Engineers Colloquium
Event date： 2025.5
Language：English Presentation type：Oral presentation (general)
Venue：Tokyo Country：Japan
Trial for improving the accuracy of spatial superimposition in bridge inspection support system using marker-type Augmented Reality Display
Kensho HIRAO, Ryudo KASHIMA, Hiroshi TAMURA, Jiaqi WANG, Hiroshi KATSUCHI
2024.9 JSCE
Event date： 2024.9
Language：Japanese Presentation type：Oral presentation (general)
Venue：Miyagi Country：Japan
In bridge proximity visual inspections, work is often required in dark and cramped spaces. In addition, since many members have similar appearances, there is a possibility of misidentifying the name of a member or its current location. Therefore, there is a need to develop an augmented reality (AR)-based bridge inspection support system to reduce the workload of on-site inspectors, however, the accuracy of the system is a problem and the system has not yet been widely used in the field. In this study, a combination of marker-type AR and a unique system was tried to achieve high accuracy. The performance of the system was also evaluated inside a steel box girder of a road bridge. As a result, it was confirmed that the system developed in this study ensures practical accuracy.
舗装状態が車両と橋の相互作用に及ぼす影響に着目した鋼I桁の疲労損傷に関する数値的研究
宮崎凌也，シリンゴリンゴディオニシウス，田村洋，平尾賢生，勝地弘，王嘉奇
土木学会第79回年次学術講演会 2024.9 土木学会
Event date： 2024.9
Language：Japanese Presentation type：Oral presentation (general)
Venue：宮城 Country：Japan
2025 Experiment in Civil Engineering B
College of Urban Sciences
2025 Exercises on Structural Mechanics
College of Urban Sciences
物理1及演習
2024.4 Institution：法政大学
Level：Undergraduate (specialized)
Japan Steel Bridge Engineering Association "Working Group on Joints of Steel Bridges"
2022.11 Academic Member
Committee type：Academic society
Techno-Science Research Journal
2024.11 Editor
Committee type：Academic society
Bridge and Foundation Engineering
2022.10
Committee type：Other
