Search - 山口県大学共同リポジトリ

Development of VR-based inspection support system for crack and spalling detection in deteriorating bridges

Memoirs of the faculty of engineering, Yamaguchi university Volume 66 Issue 2

In this study, a novel VR-based system for inspection of deteriorating concrete bridges is proposed to support of the crack and spalling detection which is a key role in existing bridge maintenance. The proposed system, called a VR-based support system for bridge inspection, was applied to an aged bridge for confirming the representing ability of both cracking and spalling damages as a specific example. Experimental results showed that the VR images data with hammering sounds (audio) data have a sufficient ability of representing both crack width over 0.2 mm and a certain spalling area near concrete surface. In this system, the three-dimensional image(photo) data was used to recognize the cracking damage for professional visual inspector. On the other hand, as spalling damage inside the concrete surface couldn’t be identified accurately from only image(photo) data, then the hammering sounds (audio) data was incorporated into the system as an additional function for recoginittion of the spalling damage.

Creators : Emoto Hisao | Miyamoto Ayaho | Takahashi Jun Publishers : 山口大学工学部 Date Issued : 2016-03

Field test on bridge condition assessment by bridge monitoring system based on public bus vibration

Memoirs of the faculty of engineering, Yamaguchi university Volume 66 Issue 2

In this study, as one solution to the problem for condition assessment of existing short- and medium-span reinforced/prestressed concrete bridges, a new monitoring method using a public bus as part of a public transit system (bus monitoring system) is proposed, along with safety indices, namely, characteristic deflection, which is relatively free from the influence of dynamic disturbances due to such factors as the roughness of the road surface, and a structural anomaly parameter. A basic study was conducted by using the results of technical verification experiments and numerical analysis simulation. This paper describes the details of not only how to assess the bridge condition by public bus vibration measured in operating on Ube City bus network as a specific example for verify the system but also what kind of consideration we need to apply the system to existing bridges in overseas country. And, the degrees of abnormality of the monitored bridges were expressed with the "inspection necessity level" to enable local governments to prioritize their bridge maintenance needs quantitatively.

Creators : Miyamoto Ayaho | Emoto Hisao | Yabe Akito Publishers : 山口大学工学部 Date Issued : 2016-03

A note for the reading of "Tenjiku" section of Konjaku-monogarari-shu as a life of Sakya-muni Buddha

The philosophical studies of Yamaguchi University Volume 23

Creators : Kashiwagi Yasuko Publishers : 山口大学哲学研究会 Date Issued : 2016-03-25

Womit muss der anfang der Philosophie gemacht werden,oder was ist das Prinzip（arche） aller Seienden?

The philosophical studies of Yamaguchi University Volume 23

Creators : Sano Yukihito Publishers : 山口大学哲学研究会 Date Issued : 2016-03-25

ベルクソンの「感性」概念についての考察

The philosophical studies of Yamaguchi University Volume 23

Creators : Murakami Ryu Publishers : 山口大学哲学研究会 Date Issued : 2016-03-25

True rhetoric in Plato's Phaedrus

The philosophical studies of Yamaguchi University Volume 23