Showing papers in "Journal of Japan Society of Civil Engineers in 2016"
24 citations
16 citations
TL;DR: In this paper, the path dependency of high cycle fatigue behaviors of RC bridge slabs under various loading histories was discussed in use of laboratory experiments and numerical behavioural simulation, and the observed phenomenon in the experiments was succ e sfully simulated by direct path-integral 3D nonlinear FE analysis considering the varying bound ary conditions from the preliminary loading state t o the main one to introduce the high cycle cycle fatigue damage s.
Abstract: This paper discusses the path dependency of high cy cle fatigue behaviours of RC bridge slabs under var ious loading histories in use of laboratory experiments and numerical behavioural simulation. A prototype standard RC slab and another two specim ens, which were initially loaded statically in adva nce, were prepared for the subsequent wheel-type loading . All three of them were tested under a moving load f 160kN. Observed is the independency of the progress iv mid-span deflection on the loading histories. Furthermore, the same trend is rather observed at a level of 220kN as well with another set of specime ns of exactly the same shape and dimension. The observed phenomenon in the experiments was succ e sfully simulated by direct path-integral 3D nonlinear FE analysis considering the varying bound ary conditions from the preliminary loading state t o the main one to introduce the high cycle fatigue damage s.
10 citations
TL;DR: In this article, a water resources engineering research group, Faculty of Civil and Environmental Engineering, Tohoku University (Aoba 468-1 Aoba-ku Sendai-shi Miyagi, 980-0845, Japan) was established.
Abstract: 1Member of JSCE, Department of Civil and Environmental Engineering, Tohoku University (Aoba 468-1 Aoba-ku Sendai-shi Miyagi, 980-0845, Japan) 2Member of JSCE, Assistant Professor, International Research Institute of Disaster Science, Tohoku University (Aoba 468-1 Aoba-ku Sendai-shi Miyagi, 980-0845, Japan) 3 Researcher, Water Resources Engineering Research Group, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology (Jalan Ganesha 10 Bandung 40132, Indonesia) 4Member of JSCE, Associate Professor, International Research Institute of Disaster Science, Tohoku University (Aoba 468-1 Aoba-ku Sendai-shi Miyagi, 980-0845, Japan) 5 Member of JSCE, Professor, Department of Civil and Environmental Engineering, Tohoku University (Aoba 6-6-06 Aoba-ku Sendai-shi Miyagi, 980-8579, Japan) 6Member of JSCE, Professor, International Research Institute of Disaster Science, Tohoku University (Aoba 468-1 Aoba-ku Sendai-shi Miyagi, 980-0845, Japan)
9 citations
TL;DR: 1Member of JSCE, Research and Development Center, Nippon Koei Co., Ltd, E-mail: hitokoto-ms@n-koei.jp
Abstract: 1Member of JSCE, Research and Development Center, Nippon Koei Co., Ltd. (2304, Inarihara, Tsukuba, Ibaraki 300-1259, Japan) E-mail: hitokoto-ms@n-koei.jp 2Member of JSCE, Research and Development Center, Nippon Koei Co., Ltd. (2304, Inarihara, Tsukuba, Ibaraki 300-1259, Japan) E-mail: sakuraba-ms@n-koei.jp 3Assistant Professor, Graduate School of Informatics and Engineering, University of Electro-Communications (1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan) E-mail: seiuny@uec.ac.jp
8 citations
8 citations
TL;DR: In this article, an associate professor at Tohoku University has been employed at the International Research Institute of Disaster Science (IRI-DISS) to train a disaster mitigation team.
Abstract: 1Member of JSCE, Department of Civil and Environmental Engineering, Tohoku University (468-1 Aoba, Aoba-ku, Sendai-shi, Miyagi, 980-0845, Japan) E-mail:idham.moe@gmail.com 2Member of JSCE, Associate Professor, Department of Environmental Engineering, Toyama Prefectural University (5180 Kurokawa, Imizu-shi, Toyama 939-0398, Japan) 3Member of JSCE, Graduate School of Environmental Studies, Tohoku University (468-1 Aoba, Aoba-ku, Sendai-shi, Miyagi, 980-0845, Japan) 4 Researcher, Water Resources Engineering Research Group, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology (Jalan Ganesha 10 Bandung 40132, Indonesia) 5Member of JSCE, Associate Professor, International Research Institute of Disaster Science, Tohoku University (468-1 Aoba, Aoba-ku, Sendai-shi, Miyagi, 980-0845, Japan) 6 Member of JSCE, Professor, Department of Civil and Environmental Engineering, Tohoku University (6-6-06 Aoba, Aoba-ku, Sendai-shi, Miyagi, 980-8579, Japan) 7Member of JSCE, Professor, International Research Institute of Disaster Science, Tohoku University (468-1 Aoba, Aoba-ku, Sendai-shi, Miyagi, 980-0845, Japan)
8 citations
8 citations
TL;DR: The spatial depth distribution of flood inundation, caused by 2015 Kanto-Tohoku heavy rainfall, was estimated at the lower part of the Kinu River basin this article.
Abstract: The spatial depth distribution of flood inundation, caused by 2015.09 Kanto-Tohoku heavy rainfall, was estimated at the lower part of the Kinu River basin. The presented procedure follows 1) to measure the elevations of flood marks (i.e. flood water levels) with a high spec GPS (at 35 locations in this study), 2) to spatially interpolate the measured water levels and 3) extract the topographic elevation from the interpolated water level. The estimation result suggested that paddy field in the southern part of Joso city had the deepest depths with about 3.8 m, while the average depths in the entire area was estimated to be 1.44 m. Average depths on natural levees (= 0.87 m), typically used for residential areas, was about 50 % smaller than that on other flat areas (= 1.75 m). The presented approach is an efficient method to estimate the spatial distribution of flood water depths over large areas.
7 citations
7 citations
TL;DR: A member of JSCE, Ph. D., Assistant Professor, School of Life and Environmental Science, University of Tsukuba (Tsukuba, Japan) as discussed by the authors, is a research specialist at the International Centre for Water Hazard and Risk Management.
Abstract: 1Member of JSCE, Ph. D., Senior Divisional Engineer, Water Resources Division, Water and Energy Commission Secretariat (Kathmandu, Nepal) 2Fellow of JSCE, Dr. Eng., Professor, Dept. of Civil Eng., the University of Tokyo (Bunkyo-ku, Tokyo, 113-8656, Japan) International Centre for Water Hazard and Risk Management, (Tsukuba, Japan) 3Member of JSCE, Ph. D., Research Specialist, International Centre for Water Hazard and Risk Management, (Tsukuba, Japan) 4Member of JSCE, Ph. D., Professor, Inst. of Tibetan Plateau Research, Chinese Academy of Sciences (Beijing, 100085, China) 5 Member of JSCE, Ph. D., Assistant Professor, School of Life and Environmental Science, University of Tsukuba (Tsukuba, Japan)
TL;DR: In this article, the influence of the alkali-silica reaction (ASR) on the fatigue resistance of a RC bridge deck was investigated, and the degradation of stiffness due to ASR and fatigue was evaluated by way of a forced vibration test using a small vibration device.
Abstract: This study aims at investigating the influence of the alkali-silica reaction (ASR) on the fatigue resistance of a RC bridge deck. Firstly, using full-sized RC deck specimens, two sets of accelerated ASR tests were performed under different environmental conditions. Then, a wheel-load tracking test was conducted focusing on the presence or absence of water on the upper face of the specimen. The deflection and crack pattern of the RC deck specimen was recorded after each tracking, while degradation of stiffness due to ASR and fatigue was evaluated by way of a forced vibration test using a small vibration device. The results revealed that the fatigue resistance of an RC bridge deck depends on the ASR environment, which is assumed to be attributable to the introduction of chemical prestress by ASR, and the interaction of crack propagation and water action. The vibration test proved useful in evaluating the fatigue resistance of an RC bridge deck with ASR.
TL;DR: This paper aims to demonstrate the efforts towards in-situ applicability of EMMARM, as to provide real-time information about concrete mechanical properties such as E-modulus and compressive strength.
Abstract: 1Graduate Student, Graduate School of Interdisciplinary Science and Engineering, Tokyo Institute of Technology (Nagatsuta 4259, Yokohama, Kanagawa 226-8502, Japan) E-mail: roy.a.aa@m.titech.ac.jp 2Graduate Student, Graduate School of Interdisciplinary Science and Engineering, Tokyo Institute of Technology (Nagatsuta 4259, Yokohama, Kanagawa 226-8502, Japan) E-mail: kobayashi.r.af@m.titech.ac.jp 3Adjunct Professor, Centre for Global Engineering, University of Toronto (200 College Street, Toronto, ON, M5S 3E5, Canada) E-mail: moin.hossain@utoronto.ca 4Member of JSCE, Associate Professor, Graduate School of Interdisciplinary Science and Engineering, Tokyo Institute of Technology (Nagatsuta 4259, Yokohama, Kanagawa 226-8502, Japan) E-mail: ymuro@enveng.titech.ac.jp
TL;DR: In this article, Kimu et al. proposed a method to improve the performance of a Hydraulic Research Laboratory at Hokkaido University by using a two-dimensional model of the Kita-Ku.
Abstract: 1Member of JSCE, Dr. of Eng., Researcher, Hydraulic Research Laboratory, Hokkaido University (Sapporo, 060-8628, Kita-Ku, Kita-13, Nishi-8, Japan) E-mail:ahmedmrazek@yahoo.com 2Member of JSCE, Dr. of Eng., Associate Professor, Hydraulic Research Laboratory, Hokkaido University (Sapporo, 060-8628, Kita-Ku, Kita-13, Nishi-8, Japan) E-mail: i-kimu2@eng.hokudai.ac.jp 3Member of JSCE, Dr. of Eng., Professor, Hydraulic Research Laboratory, Hokkaido University (Sapporo, 060-8628, Kita-Ku, Kita-13, Nishi-8, Japan)
TL;DR: In this article, an attempt has been made to study through laboratory experiments to precisely look into the suspended sediment transport at entrance of beel, with change of outflow at side basin or tidal beel and change of sediment concentration at inlet, the transportation and deposition of sediment are investigated.
Abstract: The main purpose of Tidal Basin Management is to get suspended sediment deposits gradually under a controlled system. When a cut is made at an appropriate point of embankment, muddy water enters the tidal basin during high tide, depositing a portion of suspended sediments on the basin before flowing back towards the ocean during low tide. An attempt has been made to study through laboratory experiments to precisely look into the suspended sediment transport at entrance of beel. With change of outflow at side basin or tidal beel and change of sediment concentration at inlet, the transportation and deposition of sediment are investigated. Transportation and deposition of suspended sediment mainly depend upon direction of flow and magnitude of outflow discharge at side basin. Better understanding of sediment transport phenomena increases the effectiveness of Tidal Basin Management.
TL;DR: In this article, the authors extended the Synthesis Probability Method (SPM) to estimate a flood risk curve considering spatio-temporal distribution of rainfall by applying the synthesis probability method that estimates probability function of annual maximum flood peak discharge (AMF).
Abstract: To design integrated flood risk management, flood risk assessment based on the economic damage is essential. In previous studies, the authors have developed a method to estimate a flood risk curve considering spatio-temporal distribution of rainfall by applying the Synthesis Probability Method (SPM) that estimates probability function of annual maximum flood peak discharge (AMF). Recently, the SPM was improved by introducing the relation between total rainfall and the duration time, and the estimated probability distribution of AMF with the improved SPM showed a better agreement with the probability distribution of observed AMF. This study extended the improved SPM to flood risk curve development and estimated a flood risk curve of the Ayabe city in the Yura-gawa River basin.