Sae-Joon Park
Yonsei University · 医学
研究室紹介
Professor Sae-Joon Park's research lab specializes in structural engineering and environmental remediation, with a focus on enhancing the seismic and wind-resistant performance of civil infrastructure such as cable-stayed bridges and water tanks. The lab also conducts advanced research on advanced oxidation processes for industrial wastewater treatment, particularly targeting recalcitrant pollutants like dyes and oxalic acid. Key research directions include innovative structural systems (e.g., partially earth-anchored cable systems), performance evaluation of steel-concrete composite connections, and optimization of AOPs for sustainable water treatment.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
11The aim of this study is to examine the structural effects of the partially earth-anchored cable system on cable-stayed bridges with medium main span length (between 150 and 500 m). It is assumed that the system, originally introduced as a means of reducing excessive axial force in the girder of long-span cable-stayed bridges, can be applied to medium-span cable-stayed bridges. By simulating two types of three-span cable-stayed bridges, one with the self-anchored cable system and the other with
This study evaluates behavior of the Y-type perfobond rib shear connector proposed by Kim et al. (2013). In addition, an empirical shear resistance formula is developed based on push-out tests. Various types of the proposed Y-type perfobond rib shear connectors are examined to evaluate the effects of design variables such as concrete strength, number of transverse rebars, and thickness of rib. It is verified that higher concrete strength increases shear resistance but decreases ductility. Placin
In this study, an externally reinforced structural system for SMC(Sheet Molding Compound) panel water tank, designed according to the Japanese design code, is experimented to evaluate its seismic performance. The test tank is 3m long, 2m wide and 3m high, considering the capacity and size of the shaking table. The measured hydrodynamic pressures are found to be approximately 70% of the Japanese design code values. It may be partially due to the convex shape effect of the unit panels. The analyti
Dye wastewater generally contains strong color and non-biodegradable materials. Therefore, the conventional wastewater treatment plant can hardly meet the regulation of wastewater effluent water. In this study, a pilot plant of the conventional process followed by advanced oxidation process (AOP), was set up to treat the dying wastewater. The treatment efficiencies on the various candidate processes, such as ozone alone, UV alone, ozone/UV, ozone/H2O2, H2O2/UV and ozone/UV/H2O2, were investigate
In this study, a partially earth-anchored cable system is studied in order to reduce the dynamic wind response of cable-stayed bridges. The employment of earth-anchored cables changes the dynamic characteristics of cable-stayed bridges under wind loads. In order to estimate the changes in the member forces, the spectral analysis for wind buffeting loads are performed and the peak responses are evaluated using 3-D finite element models of the three-span cable-stayed bridges with the partially ear
Clear cell meningioma (CCM) is a rare subtype of World Health Organization grade II meningioma with a high rate of recurrence. Only a limited number of cases of distal recurrence or metastasis of CCM have been reported. We report a rare case of distal CCM relapse from an intracranial to intraspinal lesion. A 29-year-old female presented with diplopia and right partial sixth nerve palsy. Brain magnetic resonance imaging (MRI) revealed petroclival meningioma extending to the middle cranial fossa a
PURPOSE: Unilateral biportal endoscopic discectomy (UBE) is an effective and minimally invasive technique for the treatment of degenerative lumbar diseases. However, reoperation may be required, and evidence on how risk factors vary according to the timing of reoperation remains limited. This study aimed to identify the clinical and radiologic factors associated with short-term (<6 months) and long-term (≥6 months) reoperations following UBE. MATERIALS AND METHODS: This retrospective study inclu
본 연구에서는 오존, UV, TiO2를 이용한 고급산화공정의 옥살산 제거효율을 평가하였다. 오존, UV, TiO2를 각각 단독으로 적용하거나 다양하게 혼합 적용시킨 고급산화처리 후 옥살산 제거효율들을 비교한 결과, 오존/UV/TiO2 공정에서 가장 산화효능이 높게 나타났다. 수중에 잔류하는 옥살산 농도와 TOC 농도간의 상관성을 확인하였고, 각 공정별로 유사하게 나타난 옥살산 제거경향과 TOC 저감경향의 비교를 통해서 옥살산의 분해는 거의 완전산화가 이루어진다는 것을 알 수 있었다.
교량구조물은 사회물류흐름에 필요한 중요한 역할을 하는 사회간접시설물로 공용수명이 다하거나 지진, 폭풍 등의 자연재해에 따라 구조물의 손상이 발생할 경우 기존 교량을 철거하고 재가설 하여야 한다. 공용중인 교량을 재가설할 경우, 차량의 우회, 교통체증에 따른 사용자비용과 공사기간동안의 소음, 분진 등에 따른 사회비용이 발생하게 된다. 하지만 교량의 재가설에따른 사용자비용과 사회비용은 교량건설시 고려되지 않고, 이를 평가하는 방법 또한 모호하므로 이를 적용한 교량형식이 선정되지 못하고 있다. 따라서 본 연구에서는 교량의 재가설시 발생되는 사회적 간접비용, 즉 사용자의 사회적, 경제적 가치를 파악하여 교량 재가설에 따른 사용자비용의 평가방법을 제안하고 이를 평가하였다. 사용자비용의 평가 시 교량의 일교통량, 첨두시간, 우회거리, 우회시간 등을 포함한 교통정보와 사회적 물동량이 고려되었으며, 차량운행비용과 교량 재가설에 따른 시간지연비용 또한 고려되었다.
Recently, the need for subminiature storage systems has increased with the diversification of portable devices. An actuator for small optical disk drives has to satisfy performance requirements such as higher access speed, lower power consumption, and smaller size. In this paper, we proposed the miniaturized rotary type VCM actuator that had an effective focusing mechanism and secured sufficient bandwidth for small form factor (SFF) optical disk drive (ODD). Initial model was designed by electro
조적조 구조물은 전 세계적으로 중·저층 주거시설, 상업시설, 종교용 건축물, 학교, 관공서 등의 용도로 폭넓게 사용되어 왔다. 그러나 조적벽체는 조적개체와 모르타르의 이질재료를 접착하여 쌓는 방식의 구조벽체로 지진과 같은 횡력 발생 시 접착력을 잃거나 미끄러지면서 파괴될 수 있다. 본 연구는 이러한 문제점을 해결하고자 조적식 구조물의 내진보강 기법을 제안하였으며, 진동대 실험을 통하여 내진 성능을 검증하였다. 진동대 실험 결과, 본 연구에서 제안한 내진보강 기법을 이용한 벽체는 한국 건축설계기준이 제시하는 내진 기준인 0.14g와 미국 IBC에서 제시하는 내진 기준인 0.4g에서 모두 최종 파괴에 도달하지 않았다. 그러나, 0.14g 이상의 지진을 경험한 면외방향 실험체의 경우 급격한 강성저하가 관찰되어, 적절한 보수·보강이 필요할 것으로 예측된다.