Smart Structure Lab.
Keimyung University, Republic of Korea
Machine Learning-based Prediction of Shear Strength & Failure Modes of Interior RC Beam-Column Joints (Studied by Dr Vikas Mehta)
Regional Earthquake Disaster and Socio-Economic Assessment
(Studied by Sung Hyun Jang, PhD Candidate)
Artificial Ground Motion Generation Method considering Korean Region Characteristics : A Study based on Gyeongju and Pohang Earthquake Records
(Studied by Jin Su Woo, ME)
This study generated artificial earthquake waves using log-normal distribution-based response spectra derived from the 2016 Gyeongju and 2017 Pohang earthquakes. By considering epicenter distance combinations, the artificial waves reflected local seismic characteristics and met domestic design standards. The applied envelope function allowed the waves to realistically simulate amplitude variations and site-specific features.
Rocking & Overturning Properties of Freestanding Contents on Seismically Isolated Building
(This research was conducted by Khine Thazin Phyu Kyaw, currently a PhD student at the University of Manchester)
The dynamic behavior of freestanding nonstructural elements such as furniture and other appliances which are resting on the floors were analyzed and evaluated their rocking and overturning characteristics during earthquake excitation. In particular, there is a problem arising from the unclear boundary between rocking and overturning motion of the contents conducted by Ishiyama criterion which has been used in the previous studies. To solve that problem, a new modified criterion was developed using peak accelerations (PFAs) and peak velocities (PFVs) of the floors where freestanding contents are located.
For structural analysis, not only fixed base structure (model 1) but also base isolated structure using lead rubber bearings (model 2) and hybrid structure with lead rubber bearings and viscous dampers at the base (model 3) were considered to compare the dynamic behavior of the contents since the structural period was lengthened by the provision of lead rubber bearings.
Running Vibration Properties of Monorail Transit (Daegu Metropolitan City - Line 3)
(Studied by Dong Hee Kwon, ME)
Seismic Isolation & Vibration Control
Seismic isolation and vibration control are essential technologies that reduce the impact of ground motion and vibrations on structures. Using materials like base isolators and dampers, these systems improve resilience during seismic events and dynamic loading. With increasing earthquake frequency and complex structures, their necessity has grown. Vibration control also protects sensitive equipment, ensuring stability and longevity. These technologies enhance safety, reduce maintenance costs, and improve performance under dynamic forces.
Expecially, as a novel structural control strategy, tuned mass damper (TMD) inspired passive and semi-active smart
building isolation systems are suggested to reduce structural response and thus mitigate structural damage due to
earthquake excitations. The isolated structure’s upper stories can be utilized as a large scaled TMD, and the isolation layer,
as a core design point, between the separated upper and lower stories entails the insertion of rubber bearings and
(i) viscous dampers (passive) or (ii) resettable devices (semi-active).
Does this sufficiently contribute to urban socio-economic RESILIENCE?
Emphasizing urban-scale earthquake disaster resilience is essential for effective disaster preparedness and recovery. Traditional approaches have primarily focused on enhancing the seismic design and performance of individual structures. Seismic activity, however, frequently causes widespread disruption to entire cities in short timeframes, demonstrating the insufficiency of building-specific strategies.
Urban and regional-level preparedness, including integrated emergency response systems and infrastructure interdependencies, offers a more practical and impactful approach. Resilience-based planning and policy are crucial to guide the recovery phase, encompassing socio-economic effects, ensuring sustainable and adaptive disaster management.
