Kawakam Y.,Hanshin Expressway Company Ltd |
Kanaji H.,ATRAS Company Ltd |
Oku K.,ATRAS Company Ltd
Procedia Engineering | Year: 2011
Recently, a number of fatigue cracks have been detected in orthotropic steel decks in Japan. An effective inspection method for detecting and monitoring crack is strongly needed. In this study, Field Signature method (FSM), which is one of the Non-destructive inspection methods and has been already applied to detect corrosion or a section reduction of the plumbing in a power station and various plants, was focused. FSM system was applied to a couple of real steel bridges which were under different conditions during this study. Finally, an effectiveness of the system for monitoring fatigue cracks on steel bridges has been verified.
Hida H.,Hanshin Expressway CO.LTD |
Adachi Y.,Hanshin Expressway Co. |
Okashiro S.,Naigai Kozo Co.
IABSE Conference, Nara 2015: Elegance in Structures - Report | Year: 2015
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.
Kim J.,Tohoku University |
Kurauchi F.,Gifu University |
Uno N.,Kyoto University |
Hagihara T.,Hanshin Expressway Company Ltd |
Daito T.,Transportation System Studies Laboratory Co.
Journal of Intelligent Transportation Systems: Technology, Planning, and Operations | Year: 2014
In this study, we explored the potential of using electronic toll collection (ETC)-derived data that are a part of intelligent transport systems (ITS). Dynamic origin-destination (OD) traffic volumes were estimated using ETC data on the Hanshin Expressway. A dynamic OD estimation model that was suggested in a previous study was used, and abundant ETC data were input to improve the estimation accuracy. The results of OD estimation were analyzed to understand traffic demand and its variation. External factors were clarified that have an influence on variances in the OD flows, and statistical analysis methods for the variations were proposed depending on the factors. Moreover, the improvements in traffic simulation accuracy and performance as a result of using ETC data as input variables in the simulation models were discussed. According to the results of this study, ETC data have potential to assist in understaningd traffic demand and its variation, and the results can be applied to network management. © 2014 Copyright © Taylor and Francis Group, LLC.
Ushiro M.,Hanshin Expressway Company Ltd |
Jidou M.,Hanshin Expressway Technology Center
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report | Year: 2015
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.
Kume S.,Hanshin Expressway Company Ltd |
Kanazawa K.,Hanshin Expressway Company Ltd |
Hara H.,Hanshin Expressway Company Ltd
BHR Group - 16th International Symposium on Aerodynamics, Ventilation and Fire in Tunnels 2015 | Year: 2015
Hanshin Expressway Company Limited has placed the Yodogawa-sagan Route in service since 25 May, 2013. The Route is about 5.6 km long, 60 percent of which is a two-tube tunnel structure. This tunnel named "Shorenji-gawa Tunnel" is located in an urban area in Osaka City, and has an on and off ramp in each tube. As the traffic signals installed at the off ramps may cause traffic congestion in the tunnel, we had to consider various traffic conditions when we designed the strategy of ventilation control Especially in case of a fire, it is very important that ventilation equipment works properly and controls behaviour of smoke from fire adequately because spreading smoke may cause degradation of tunnel user's visibility, and breathing difficulty, which lead to their lives being put in danger. For the tunnel we adopt a longitudinal ventilation control system, which consists of 17 jet fans on the ceiling of tunnel and 2 exhaust fans in the ventilation station in each tube. In order to limit the damage of fire, we designed an adequate ventilation control strategy for the tunnel. In fact the operation of the ventilation control system adapts to the traffic conditions Consequently, an automatic ventilation control system using inverter driven jet fans has been established successfully. This paper introduces the outline of the adaptive ventilation control algorithm and reports experimental results of the ventilation control for "Shorenji-gawa Tunnel", one of the long urban tunnels in Japan. © BHR Group ISAVFT 2015.
Choi J.-H.,Kyushu University |
Hozoji K.,Kyushu University |
Yatsumoto H.,Hanshin Expressway Company Ltd
Engineering for Progress, Nature and People | Year: 2014
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.
Mishina Y.,Tokyo Institute of Technology |
Taniguchi Y.,Hanshin Expressway Co. |
Muromachi Y.,Tokyo Institute of Technology
Transportation Research Record | Year: 2011
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.
Yoshida T.,Hanshin Expressway Engineering Company Ltd |
Adachi Y.,Hanshin Expressway Company Ltd |
Hayashi K.,Hanshin Expressway Company Ltd
Underground - The Way to the Future: Proceedings of the World Tunnel Congress, WTC 2013 | Year: 2013
In general, visual and hammer method is employed for periodical inspection for road tunnels. This method is widely-used method to collect damage information of the tunnel lining, such as crack density or concrete deterioration state as tunnel deterioration index. This method has been widely used but is conducted under in arm-length. Therefore, this method requires traffic flow restriction of entire tunnel length. Moreover, the obtained inspection information is recorded by drawings of inspectors. This means that quantitative deterioration information could not be obtained under current inspection techniques. The authors try to implement 3D laser scanning technique to tunnel inspection that can collect tunnel deformation state directly without the need for any traffic restriction. 3D laser scanning is a new era of measurement tools that can be measured with an accuracy of three-dimensional spatial data of a few mm to 50,000 points per second. The accuracy is almost equivalent to the electronic distance meter. The authors found that 3D laser scanning technique can measure the change in cross section of the tunnel lining year by year which has not been performed by current inspection technique. In addition, the authors found that the combination with current visual inspection and 3-D laser scanner inspection can achieve more efficient, advanced and high quality inspection for road tunnel. In this paper, the authors report the results of these study. © 2013 Taylor & Francis Group.
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 | Year: 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.
Yashiro K.,Kobe University |
Nishimura H.,Hanshin Expressway Co.
Zairyo/Journal of the Society of Materials Science, Japan | Year: 2014
For a new insight on solid lubricant of fullerenes and onion-like carbons (OLCs), we have performed scratch simulations on isolated fullerenes/OLCs and monolayer film of their array. Here, molecular dynamics simulation may overestimate bond-forming between the scratch surface and target carbons, so that we consider only the van der Waals interaction between the rigid diamond and fullerenes/OLCs. On this condition, both the isolated/layered fullerenes/OLCs doesn't show rotation but slip on the perfect (001) diamond surface, showing frictional coefficient lower than μ=0.05. On the other hand, the fullerenes/OLCs show rotation and higher frictional coefficients of μ=0.1-0.3, if we set surface roughness on both scratch walls. In this rotational friction, larger fullerenes/OLCs show smaller frictional coefficients, and the fullerenes shows higher frictional coefficient than OLCs of same size.©2014 The Society of Materials Science Japan.