A5008098197- Structural Behavior of Reinforced Concrete
- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Seismic Performance and Analysis
- Structural Health Monitoring Techniques
- Structural Response to Dynamic Loads
- Structural Engineering and Vibration Analysis
- Nuclear materials and radiation effects
- Structural Load-Bearing Analysis
- Mechanical stress and fatigue analysis
- Concrete Corrosion and Durability
- Fire effects on concrete materials
- Infrastructure Maintenance and Monitoring
- Graphite, nuclear technology, radiation studies
- Magnesium Oxide Properties and Applications
- Geotechnical Engineering and Underground Structures
- Radioactive element chemistry and processing
- Graphene research and applications
- Adhesion, Friction, and Surface Interactions
- Concrete Properties and Behavior
- Dynamics and Control of Mechanical Systems
- Recycling and utilization of industrial and municipal waste in materials production
- Advanced ceramic materials synthesis
- Radiation Shielding Materials Analysis
- Contact Mechanics and Variational Inequalities
Gachon University
2025
Purdue University West Lafayette
2018-2023
Anyang University
2023
Hanyang University
2011-2023
University of Connecticut
2021
Immediate action is required to achieve carbon neutrality within the cement industry. The integration of biochar into as a component reinforced concrete has potential mitigate emissions in construction sector by enabling sequestration. In pursuit eco-friendly practices and improved physical properties composites, this study investigated wood-based, micron-sized non-carbonate raw material, including its chemical composition, morphology, wettability. characterization lignocellulosic...
In recent years, nano-reinforcing technologies for cementitious materials have attracted considerable interest as a viable solution compensating the poor cracking resistance of these materials. this study, first time, titanium nanotubes (TNTs) were incorporated in cement pastes and their effect on mechanical properties, microstructure, early-age hydration kinetics was investigated. Experimental results showed that both compressive (~12%) flexural strength (~23%) enhanced with addition 0.5...
Linear and nonlinear response history analyses (RHA) are often conducted for predicting the seismic demand capacity of structures. The proper selection ground motions is critical to obtaining reliable results from RHA. purpose this study was develop a computationally efficient accurate procedure selecting scaling matching target spectrum with zero variance, such as uniform hazard spectrum, design that can consider variance in nature. In proposed procedure, one motion at time selected scaled...
Load distribution factor for truck loads is a key parameter in evaluating the load-carrying capacity of existing bridges. This study aimed to investigate load rating procedures reinforced concrete bridges using tools numerical analysis. In this study, three-dimensional finite-element modeling was used estimate shear and bending moment demands capacities sample 10 (five flat slab five T-beam) The results were compared with those obtained current accordance AASHTO specifications. comparison...
๋ณธ ์ฐ๊ตฌ์์๋ ์ง๋ฐ์ด๋ ๋ผ์ด๋ธ๋ฌ๋ฆฌ์์ ๋ชฉํ์คํํธ๋ผ์ ๊ทผ์ฌํ ํ๊ท ์๋ต์คํํธ๋ผ์ ๊ฐ๋ ํ ๊ฐ ํน์ ๋ค์์ ์ง๋ฐ์ด๋์ ์ ์ ํ๋ ํจ์จ์ ์ธ ๋ฐฉ๋ฒ์ ์ ์ํ๊ณ ์ ํ๋ค. ์ ์ ์ ๋ชฉํ์คํํธ๋ผ์ ํ์๊ณผ ํฌ๊ธฐ๋ฅผ ๋ง์ถ์ด์ผ ํ๋๋ฐ ์ด ๋ ๊ฐ์ง๋ฅผ ๋ ๋ฆฝ์ ์ผ๋ก ๊ณ ๋ คํ ์ ์๋ค๋ ๊ธฐ์กด ์ฐ๊ตฌ๊ฒฐ๊ณผ์ ๋ฐ๋ผ ์ฐ๊ตฌ์์๋ ํ์์ด ๊ฐ์ฅ ์ ์ฌํ ์ฐพ๊ณ ๋ง์ถ๊ธฐ ์ํ์ฌ ๋ฐฐ์จ์กฐ์ ๊ณ์๋ฅผ ์ฌ์ฉํ๋ค. ํ์์ ์ํด ๊ฐ ์ฃผ๊ธฐ์์ ๋ชฉํ์คํํธ๋ผ๊ณผ ํ๊ท ์๋ต์คํํธ๋ผ์ ์ฐจ์ด ๊ฐ์ ํ์คํธ์ฐจ๊ฐ ์ต์๊ฐ ๋๋๋ก ํ์ฌ ์ ์ํ์๋ค. ๊ฒฐ์ ๋ ํ ๊ทธ ์ฐ๊ตฌ์์ ์ ์ํ ์ฐพ๋ ๋ฐฉ๋ฒ์ ์ฐ๊ตฌ์ ๋ฌ๋ฆฌ ํ๋ฒ์ ์ฐพ์ ์๋๋ก 40๊ฐ์ ๋ผ์ด๋ธ๋ฌ๋ฆฌ๋ก๋ถํฐ ์ด์ฉํ์ฌ ํ๊ท ์คํํธ๋ผ์ 7๊ฐ์ ์ง๋ฐ์ด๋๊ธฐ๋ก์ ์ ์ ํ ๊ฒฐ๊ณผ, ์ ํ์ฑ๊ณผ ๊ณ์ฐ์์์๊ฐ์ ์์ด ๋ชจ๋ ๋ง์กฑํ ๋งํ ๊ฒฐ๊ณผ๋ฅผ ๋ณด์๋ค. This paper proposes an efficient method for selecting ground motions with the mean response spectrum matching a...
The decontamination efficiency of Co nuclides in the cement waste from nuclear power plants was increased without increasing acid concentration by applying ultrasonication techniques during decontamination. Ultrasound-assisted 1.0 M H 2 SO 4 1.5 times more efficient than 2.0 sonication, at half concentration. Ultrasonication enabled further detaching outer-layer phases CaSO that hinder contact between and nuclides. X-ray absorption spectroscopy indicated oxidation state remained particle...
This study investigates the synergistic strengthening mechanism of graphene oxide (GO), functionalized carbon nanotubes (f-CNT), and nano-silica (NS) triple hybrid-reinforced Portland cement paste. GO was selected as variable owing to effect with both f-CNTs NS upon dispersion by forming bonds nanomaterials. At a low dosage (~0.03 wt.% cement), bond between deteriorated in Ca2+-rich solution due overly attached on surface. The highest fraction (0.05 wt.%) also led poor excess agglomerated...
๋ณธ ์ฐ๊ตฌ์์๋ ์ฝํฌ๋ฆฌํธ์ surface-to-surface ์ ์ด ๋ชจ๋ธ(surface-to-surface contact model)์ ์ ์ฉ์ ๊ฒ์ฆํ๊ธฐ ์ํ ํด์์ ์ฐ๊ตฌ๋ฅผ ์ํํ์๋ค. ๊ฐ๋ ฅํ๊ณผ ์ฝํฌ๋ฆฌํธ ์ค๋ฆฐ๋์ ํ๋ฉด์ ๋ชจ๋ธ์ ์ ์ฉํ์ฌ ์์ฉ ์ ํ์์ํด์ ํ๋ก๊ทธ๋จ ABAQUS๋ก 3๊ฐ์ ์ชผ๊ฐฌ์ธ์ฅ๊ฐ๋ ์ํ์ ์๋ฎฌ๋ ์ด์ ํ๊ณ 3์ฐจ์ ํ๊ฒฝ์์ ํ๋ฉด-ํ๋ฉด ํ ์คํธ(flat-flat test)์ ํ๋ฉด-๊ณก๋ฉด ํ ์คํธ(flat-circle test)๋ฅผ ์ดํ 2 mm ํฌ๊ธฐ์ ์์๋ก 3D ์ ํ์์ํด์์ ์์์ ํฌ๊ธฐ๋ฅผ ์ค์ผ ๊ฒฝ์ฐ ํด์ ์๊ฐ์ด ๋น์ฝ์ ์ผ๋ก ์์นํ์๋ค. ๋ฐ๋ผ์ 2D ์ด์ฉํ์ฌ 0.5 ํ์ ํด์์ ์ด๋ฌํ ์ ๊ทผ๋ฒ์ ํตํด, ํฌ๊ธฐ๊ฐ ๊ฐ์ํจ์ ๋ฐ๋ผ ๊ฒฐ๊ณผ๊ฐ ์คํ ์ชผ๊ฐฌ์ธ์ฅ๊ฐ๋์ ๋ ๊ทผ์ ํ์์ผ๋ฉฐ, ์ด๋ ์ ์๋ ๋ชจ๋ธ๋ง ๊ธฐ๋ฒ์ด ํ๋นํจ์ ์๋ฏธํ๋ค.
๋ณธ ์ฐ๊ตฌ๋ ์ฒ ๊ณจ ๋ชจ๋ฉํธ ๊ณจ์กฐ์ ์ด๋ ฅ๊ฑฐ๋์ ์ ๋ํ๋ด๋ ๊ฐ๋ํ๊ณ ์ด์ ํ ๋จ์์ ๋ ์์คํ ์ ๋ํ์ฌ ์ง๋ฐ์กฐ๊ฑด, ํํ์ฑ ๊ธฐ์ธ๊ธฐ, ๊ฐ์ ๋น, ํญ๋ณต๊ฐ๋ ์ ๊ฐ๊ณ์, ๊ณ ์ ์ฃผ๊ธฐ ๋ฑ์ ๋ณํ๊ฐ ๋นํ์ฑ๋ณ์๋น์ ๋ฏธ์น๋ ์ํฅ์ ๋ถ์ํ์๋ค. NEHRP์ ๊ธฐ์ค์ ๋ฐ๋ผ B(๋ณดํต์์ง๋ฐ), C(๋งค์ฐ ์กฐ๋ฐํ ํ ์ฌ์ง๋ฐ), D(๋จ๋จํ ํ ์ฌ์ง๋ฐ)์ ์ง๋ฐ์กฐ๊ฑด์ ํด๋นํ๋ ์ด 240๊ฐ์ ์ง์ง ๊ฐ์๋์ ๋น์ ํ ์๊ฐ์ด๋ ฅ ํด์์ ์ํํ์๋ค. ์ฐ๊ตฌ์์๋ ๋นํ์ฑ ๊ฑฐ๋ ํ์์ P-<TEX>$\Delta$</TEX> ํจ๊ณผ๋ฅผ ๋ฐ์ํ ์ ์๋๋ก ์๊ฐ์ฑ๋น๋ฅผ -0.1 ์์ -0.5๊น์ง ๊ณ ๋ คํ์๋ค. ํ๊ท๋ถ์์ ํตํ์ฌ ๊ฐ์ ๋น 2%, 5%, 10%, 20%์ ๋ํ ๋ชจ๋ธ์ ๋ณ์๋น์ ๋ก๊ทธํ์คํธ์ฐจ์์ ์ ์ํ์๋ค. This study evaluated the effect of vibration, level lateral yielding strength, site conditions, ductility factor, strain-hardening...