‘The Value of Structural Health Monitoring for the reliable Bridge Management’
At the beginning of March 2017 an interesting workshop took place at the Faculty of Civil Engineering of the University of Zagreb. The Workshop was organised by two European cooperation and networking projects under auspices of the COST framework and the Working Commission 1 of IABSE.
The workshop gathered 120 participants from 40 countries and was organised through three main sessions:
The workshop in Zagreb gathered 120 participants from 40 countries with different professional background
Keynote presenters from Lehigh University in USA – Frangopol; from California Institute of Technology in USA – Beck; from Seoul National University in South Korea – Kim and from Kansai University in Japan – Furuta, shared their knowledge as external advisors
The master's thesis defence was held on December 19,2016. In our laboratory, Seung-Yeol and Kil-Ho had participated to present their thesis and successfully finished their examination. There were total number of 5 students who had announced their thesis on that day. Thesis's titles of our members are as follow.
Seung-Yeol Baek, "Aerodynamic drag force on bridge deck in a large-scale along-wind turbulence".
Kil-Ho Choi, "Time-domain/Frequency-domain dynamic analysis of bridge deck to turbulent wind".
The 2016 conference of the Korean Institute of Bridge and Structural Engineers was held at Mok-po National University on October 10th-11th, 2016. Professor Kim attended session one, in which Professor Sim of Chung-Ang University made a presentation entitled "Inspection and Mechanical Characteristics of Corroded Prestressing Steels" (Sim and Kim et al.).
Uniquely, there was a 'Young Engineer Session' aimed at encouraging researchers of Ph.Ds, or Ph.D-course students of 33 years or younger at this year's conference. Ph.D course student Sun-Joong Kim of our laboratory participated as one of the speakers, presenting "Stabilization of Identified Damping from Ambient Vibration Test by Amplitude-Modulating Function". And, to our great joy, he won 1st prize in the contest.
There was also a poster session in which master's course students Kil-Ho Choi, Seok-Hee Bong, Lee-Sak An, and Jin-Hyung Lee participated.
Kil-Ho Choi and Seong-Yeol Baek, "Combined Use of Active Turbulence Generator for Simulating Large-Scale Vertical and Longitudinal Wind Velocity Fluctuations".
Seok-Hee Bong, "Residual Life Estimation of Pitting-Corroded External Tendon".
Lee-Sak An, "New Introduction of Cable Part in Korea Highway Bridge Construction Specification"
Jin-Hyung Lee, "Dynamic Effect of Water Tank on a Cable-Supported Bridge".
On the 2nd day of the conference, there was a field trip to 'sae-cheon-nyeon bridge' in Mok-po. We visited two construction fields where different construction companies are under construction currently. The first field, a three-pylon suspension bridge(length : 3640m), was being constructed by 'Daelim'. And, the second field, a cable-stayed bridge(length : 3584m) was being constructed by 'Daewoo E&C'.
This year’s Korean Society of Civil Engineers civil expo and conference was held in Jeju International Convention Center last October 19-21, 2016.
Professor Kim Ho-Kyung participated in a special session where he introduced the outline of research projects that aim to develop technologies for risk assessment of cable bridges and constant securement of resilience against natural and man-made disasters. He also presented the research on proposed guidelines for the vehicle safety and roadworthiness of the cable stayed bridges during high wind conditions.
PhD student Han Sung-Wook also had his presentation in a separate session with a title: “Wind-resistant design of noise barriers in expressway”.
Meanwhile Kim Se-Jin participated in the thesis poster event with an entry: “Probabilistic estimation of frequency of wind-induced vehicle accident on a bridge for cosswind”.
Lastly, Ralph Acebedo participated in one of KSCE’s international programs, the Civil Engineering Leader’s Network (CELeN) meeting.
19th Congress of IABSE was held in Stockholm(Sweden) from September 21 to 23. Se-Jin Kim participated in this congress and offered an oral presentation.
Se-Jin Kim, "Vehicle Safety Assessment on Bridge Deck under Cross Wind"
2016 CHINA-SNU International Workshop
Monitoring-based wind engineering of bridges and structures
The 2016 CHINA-SNU international workshop was an academic event that focused on current research activities and interests of researchers from China and SNU. It was held in Seoul National University Civil and Environmental Engineering building 35 on the 2nd of September 2016.
Several topics were discussed by the speakers such as health monitoring of bridges and structures; field measurements of wind characteristics; numerical simulation of typhoon wind field; experimental simulation in the wind tunnel; and serviceability evaluation of running vehicle to strong side-winds.
Professor Limin Sun from Tongji University presented the topic “Monitoring of wind effects on cable-stayed bridges” and Professor Hea-Sung Lee of Seoul National University discussed about“Reconstruction of dynamic displacement and velocity using measured acceleration”
Professor Lin Zhao of Tongji University presented about “Wind field prediction and wind-induced performance of flexible structures based on on-spot observations”. Professor Mingshui Li of Southwest Jiaotong University discussed about “Field measurements of natural wind characters in mountain terrain of southwest China”.
Professor Ho-Kyung Kim of Seoul National University presented about “Wind-related field monitoring of long-span bridges” while Professor Ledong Zhu of Tongji University discussed about “Wind tunnel test and numerical analysis of aerodynamic static and dynamic instability of a super long-span cable-stayed bridge.”
Professor Jun-Ho Song of Seoul National University discussed about “System identification of structural parameters using Bayesian network”. Professor Hao Wang of Southeast University presented the topic “Wind effects on long-span cable-supported bridges based on structural health monitoring”.