SIRINGORINGO Dionysius Manly (シリンゴリンゴ ディオニシウス マンリ)

SIRINGORINGO Dionysius Manly

所属組織

先端科学高等研究院

職名

特任教員(准教授)



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  • 博士(工学) -  東京大学

  • 修士(工学) -  東京大学

学内所属歴 【 表示 / 非表示

  • 2014年10月
    -
    継続中

    専任   横浜国立大学   先端科学高等研究院   特任教員(准教授)  

  • 2014年04月
    -
    2014年09月

    専任   横浜国立大学   安心・安全の科学研究教育センター   特任教員(准教授)  

 

論文 【 表示 / 非表示

  • Noncontact operational modal analysis of light poles by vision-based motion-magnification method

    Dionysius M. Siringoringo; Samten Wangchuk; Yozo Fujino

    Engineering Structures ( Elsevier )  244   112728   2021年10月

    共著

     概要を見る

    Light and sign poles on elevated highway bridge are secondary structural elements that support functionality of a highway system. Over the time, they may suffer from fatigue damage due to traffic, wind, and earthquake- induced vibration in a direct or indirect manner. As a secondary structural component, vibrations of light and sign poles are influenced by the bridge vibration, the primary structure. Structural condition assessment of the light and sign poles are normally conducted by visual inspection and/or vibration measurement using contact or noncontact method. In this paper, a vision-based vibration measurement of the light poles on elevated highway bridges using motion magnification and dynamic mode decomposition methods is proposed. Using the method, vibrations of the light poles are captured by video camera and the phase-based motion magnification method is implemented to magnify micro-vibration of the structure. By employing discretized centroid searching method, spatial displacements of the light poles are extracted. Modal parameters of the structure are then identified from the displacement responses by dynamic mode decomposition method. The study includes laboratory experiments for verification, and the full-scale implementation on existing light poles on elevated highway bridges. The vision-based results are compared with the noncontact vibration measurement using Laser-Doppler vibrometers. Results of experiments and full-scale tests demonstrate the capability of the proposed method in extracting multi- mode vibration characteristics of the light poles accurately in a noncontact long-distance measurement.

    DOI

  • Research and development for infrastructure maintenance, renovation, and management

    Yozo Fujino; Dionysius M. Siringoringo

    Proceedings of the Second International Conference on Press-in Engineering 2021, Kochi, Japan ( CRC Press )    2021年06月  [査読有り]  [招待有り]

    共著

     概要を見る

    The collapse of Sasago Tunnel, located on the Chuo Expressway about 80 kilometers west of Tokyo in 2012, has led to questions about the current quality and safety of infrastructure, and immediately brought public attention to the issue of infrastructure degradation in Japan. Japanese government decided to invest on the research and development for efficient management of infrastructure through implementation of science and advanced technologies. The new research and development (R & D) program named “Infrastructure maintenance, renovation and management” is started in 2014 under the Council of Science, Technology and Innovation (CSTI)’s Strategic Innovation Program (SIP). The 5-year program covers various subjects of infrastructure maintenance with the key technologies in condition assessment using advanced technologies such as non-destructive testing, monitoring and robotics, long-term performance prediction of infrastructure, development of durable high-quality of material for repair and replacement, and data management of bridges and other infrastructure using advanced information and communication technologies (ICT). In this paper, outline and outcomes of this program are explained.

    DOI

  • Seismic performance evaluation of existing light poles on elevated highway bridges

    Dionysius M. Siringoringo, Yozo Fujino, Ayami Nagasaki, Takuro Matsubara

    STRUCTURE AND INFRASTRUCTURE ENGINEERING ( Taylor & Francis )  17 ( 5 ) 720 - 740   2021年05月  [査読有り]

    共著

     概要を見る

    Damages on light poles and utility poles mounted on elevated highway or railway bridges were observed in the past several large earthquakes. They were mostly due to excessive pole deformation, bending failure caused by yielding, buckling of the pole and falling of the mast. The damages did not only affect functionalities but also impeded the traffic and further complicated post-earthquake recovery of affected area. While seismic resistance of elevated highway bridges has been evaluated and upgraded in the seismic codes, most light and utility poles were designed for wind loading and not for earthquake, so their seismic performances were rarely evaluated. In this research, seismic performance of a typical light pole mounted on elevated highway bridges is investigated. The study includes experimental modal analysis of existing light pole, finite element simulation, and case study of the light pole on existing elevated highway bridge. The results of finite element simulations show that response amplification occurs when the bridge’s natural frequency is within a close range of the light pole’s fundamental frequency. Due to inherently low structural damping, the light pole experiences large amplification at the resonance, and this leads to bending failure when the maximum stress exceeds the yield stress limit.

    DOI

  • Investigation on vehicle lateral instability when crossing a curved highway bridge during an earthquake

    Dionysius M. Siringoringo,Yozo Fujino,Masaaki Yabe

    Structure and Infrastructure Engineering ( Taylor & Francis )  17 ( 5 ) 720 - 740   2021年05月  [査読有り]

    共著

     概要を見る

    This paper describes a numerical study on the vehicle instability when crossing curved highway bridge during an earthquake. Analytical framework using two-axle vehicle dynamics model is developed to describe vehicle vibration when moving under seismic excitation from the curved bridge girder. The model includes out-of-plane and in-plane motion along with the effect of curved girder with specific radius, camber angle and longitudinal grade. Two criteria for critical vehicle stability are evaluated namely the rollover and sideslip stability. As case study, numerical simulations were conducted using three-dimensional finite element model of an elevated highway junction consisting of four curved sections and two straight sections. Effects of curved bridge radii, level of earthquake, vehicle velocity and driver reaction on the vehicle stability were investigated. It was found that a vehicle moving on a curved bridge during earthquake has a larger possibility for rollover and sideslip instability than a vehicle moving on a straight section for the same driving velocity and level of earthquake. Results of simulations demonstrate that normal forces on vehicle’s wheels are significantly influenced by the curved bridge effects, steering angle, effect of road camber at the curved section. These conditions contributed to reduction of normal forces on vehicle’s wheels and increased the risk of vehicle instability.

    DOI

  • Operational modal analysis of light pole-viaduct system from video measurements using phase-based motion magnification

    T.J. Saravanan, D.M. Siringoringo, Y. Fujino, S. Wangchuk

    Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations ( CRC Press )    2021年05月  [査読有り]

    共著

     概要を見る

    Operational modal analysis (OMA) usually involves conventional sensors (wired or wireless) for vibration measurement of structures to determine the modal characteristics. This type of measurement requires sensors installation which can be time consuming and labor intensive. Video camera-based noncontact vision sensing has emerged as a promising alternative to conventional contact sensors for structural dynamic response measurement and health monitoring. Such vision sensors are relatively easy and agile to set up and provide significantly more high-spatial-density measurements where any pixel could become a measurement point. Recently, advanced computer vision algorithms like phase-based video motion magnification technique have been successfully developed to effectively process large-scale image/video data for extracting detailed structural dynamic information under small amplitude motion. The objective of this paper is to explore the potential use of phase-based video motion magnification method for OMA of civil structures. At first, a preliminary study on is carried out on a two-degree-of-freedom frame model at laboratory. Using image processing technique, the corresponding displacement is extracted from the magnified video frames and the natural frequency of the structural system is computed and verified with the reference wireless accelerometer sensors. Later, the method was implemented to practical field measurements using for modal identification and vibration measurements of existing light poles on a highway bridge. Results from both experiments suggest that the method could be used to obtain natural frequency of the structures under ambient condition where vibration amplitudes are very small and invisible.

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学術関係受賞 【 表示 / 非表示

  • IASCM Takuji Kobori Award

    2018年07月22日   International Association of Structural Control and Monitoring (IASCM)   Takuji Kobori Award  

    受賞者:  Dionysius M. Siringoringo, Yozo Fujino

     概要を見る

    The IASCM Takuji Kobori Prize awarded to a paper that is judged to be the best among all the papers published in Structural Control and Health Monitoring (SCHM)

  • IABSE Outstanding Scientific Paper Award 2014

    2014年09月05日   International Association of Bridge and Structural Engineering (IABSE)  

    受賞者:  Dionysius M. Siringoringo, Yozo Fujino

  • Tanaka Award 2013

    2014年06月13日   Japan Society of Civil Engineering (JSCE)  

    受賞者:  Yozo Fujino, Dionysius M. Siringoringo, K. Namikawa, M. Yabe

  • ASCE Outstanding Reviewer Award

    2016年06月30日   American Society of Civil Engineering   Outstanding Reviewer Award-Journal of Bridge Engineering  

    受賞者:  Dionysius M. Siringoringo

  • 日本風工学会ベストペーパー賞 2016

    2017年06月01日   日本風工学会   日本風工学会ベストペーパー賞  

    受賞者:  Tsukasa Mizutani, Yozo Fujino, Dionysius Siringoringo

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研究発表 【 表示 / 非表示

  • Lessons Learned from Seismic Monitoring of Yokohama-Bay Cable-Stayed Bridge

     

    7th Structural Health Monitoring and Intelligent Infrastructure (SHMII) Conference  2015年07月  

  • Analysis of Tower-Girder Transfer Pounding on the Yokohama-Bay Cable-Stayed Bridge during 2011 Great East Japan Earthquake

     

    IABSE Conference 2015  2015年  

  • Long-term Seismic Monitoring of an Instrumented Base-Isolated Building: Observation and Structural Analysis

     

    IABSE Symposium  2014年09月  

  • Assessment of Tower-Girder Transverse Pounding Based on Seismic Monitoring of Cable-Stayed Bridge: Case-Study of Yokohama-Bay Bridge

     

    6th World Conference on Structural Control and Health Monitoring  2014年07月  

  • Long-term Seismic Monitoring for Serviceability Performance Assessment: Case-Study of an Asymmetric Base-Isolated Building

     

    6th World Conference on Structural Control and Health Monitoring  2014年07月  

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