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Choi J.-H.,Kyushu University | Hozoji K.,Kyushu University | Yatsumoto H.,Hanshin Expressway Company Ltd
Engineering for Progress, Nature and People

In this study, in order to clarify the influence of connection part modelling method of dissipation device installed in oblique direction on an I-girder bridge, case studies using time series analysis with material nonlinearity were conducted. Here in, fixed connected models and pin connected models in between dissipation devices and bridge members were analysed respectively in a few models varied with the installing angle of dissipation device. The parametric analyses were conducted by inputting single earthquake wave in longitudinal direction and vertical direction respectively. From the time series analyses, it was identified that the connection parts modelling of dissipation device contribute little to the response of the dissipation device and it has the influence on the vertical and longitudinal displacement at girder. Source

Hida H.,Hanshin Expressway CO.LTD | Adachi Y.,Hanshin Expressway Company Ltd | Okashiro S.,Naigai Kozo Co.
IABSE Conference, Nara 2015: Elegance in Structures - Report

Slab link method has the some problems in the construction field. Solution of the problem was needed in order to perform many constructions. Then, two new structures were developed to raise construction performance. 3 type imitation models were made and capacity and fatigue tests were carried out. As a result, the model of all the types brought a satisfactory result. Source

Ushiro M.,Hanshin Expressway Company Ltd | Jidou M.,Hanshin Expressway Technology Center
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report

In order to maintain the expressway bridge assets based on minimum LCC principle, Hanshin expressway has been developed a bridge management system (H-BMS: Hanshin expressway Bridge Management System) with an estimation system module of bridge condition state by integrated inspection data and a policy making module predicting maintenance budget, repair priority, etc. With the increase of aging structure, the H-BMS should be improved to take into account of drastic large-scale renewal policy from the long term point of view. This paper shows the methodology for calculating performance based soundness indicator as a basic analysis toward development of the new H-BMS. Source

Mishina Y.,Tokyo Institute of Technology | Taniguchi Y.,Hanshin Expressway Company Ltd | Muromachi Y.,Tokyo Institute of Technology
Transportation Research Record

Reducing carbon dioxide (CO 2) emissions from passenger cars is important for meeting the long-term Japanese target for reduction of greenhouse gas emissions. Further, decomposition analysis of changes in CO 2 emissions is important for policy making. However, there is a case for concern about the reliability and accuracy of the calculation results obtained by decomposition analysis methods in previous studies related to the residual term. A decomposition analysis method was developed so that the residual term was attributed to a related factor. Changes in regional CO 2 emissions from passenger cars in Japan for 1990 to 2008 were then analyzed with this method. CO 2 emission characteristics are influenced by travel distance, number and weight of passenger cars, actual road fuel efficiency, and population. The main reason for the increase in CO 2 emissions for the period 1990 to 2001 was the increase in the number and weight of passenger cars in all regions of Japan. The main reasons for the decrease in CO 2 emissions in all regions of the country for the period 2001 to 2008 were the decrease in travel distance per passenger car and improvement in actual road fuel efficiency. Population movement from nonmetropolitan regions toward Tokyo and Osaka affected total CO 2 emissions but not significantly. Source

Ogura N.,Tokyo Institute of Technology | Yatsumoto H.,Hanshin Expressway Company Ltd | Chang K.C.,Kyoto University | Shiotani T.,Kyoto University
Emerging Technologies in Non-Destructive Testing VI - Proceedings of the 6th International Conference on Emerging Technologies in Nondestructive Testing, ETNDT 2016

Road bridge deck slabs mostly made of concrete have been strengthened by steel plate bonding method in consideration of extended use of the bridges in future. Steel plates are bonded to the deck bottom surfaces to improve load carrying performance and durability. As over 30 years have passed since the technique was first applied, debonding of steel plates is often found by hammer impact test with abnormal noise suggesting poor bonding. However, damage in deck slab concrete strengthened with steel plates cannot be directly visually observed because of the steel plates covering the bottom surfaces. Although presence and extent of debonding can be estimated by hammer impact test, detection of damage in concrete remains unestablished. The steel plate bonding method uses temporary anchors which penetrate the plates into the concrete. The authors developed an inspection method using the temporary anchors as probes to directly detect damage in the concrete. © 2016 Taylor & Francis Group, London. Source

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