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김형준,이우미,안선호,송주흥,김재민,김성완,이상열,Kim, Hyoung-Jun,Lee, Woo-Mi,Ahn, Seon-Ho,Song, Ju-Heung,Kim, Jae-Min,Kim, Sung-Wan,Lee, Sang-Yeol 대한불안의학회 2006 대한불안의학회지 Vol.2 No.2
Objective : In this study, we investigated the prevalence of depression and its impact on the healthrelated Quality of life (HRQoL) of the patients with End-Stage Renal Disease (ESRD) on Hemodialysis. Method : The Quality of life (QOL) of patients was evaluated by HRQoL Questionnaire, "Medical Outcome Survey 36-Item Short Form Health Survey Korean Version (SF-36-K)". The patients on Hemodialysis in ESRD, were chosen from the hemodialytic room at Wonkwang University and Jeongeup-Asan Hospital. The number of patients was 95 (64 from Wonkwang University Hospital and 31 from Jeongeup-Asan Hospital) and all of them were above 19 years old. We performed various investigations to find a statistical correlations between HRQoL and physical & psychosocial factors such as the demographic characteristics, clinical characteristics (hemoglobin level and albumin level etc), and the score of Beck's depressive inventory (BDI). Results : The HRQoL value of patients on hemodialysis in ESRD is far poorer than the HRQoL reference value of Koreans and Americans, who are in normal healthly. The prevalence of depressive symptoms by BDI of the ESRD patients on hemodialysis is 68.6%, and age and depression have negative correlations with HRQoL of the patients. However, education level, serum albumin level, and social support have positive correlations with HRQoL. The patient group with depression has significantly poorer HRQoL than the group without depression. Conclusion : The HRQoL of ESRD patients on hemodialysis is not good in both physical and mental aspects. The prevalence of depression is very high and depression has negative impact of HRQoL of patients. Based on our study, it is essential to accompany with therapeutic Strategy to improve the HRQoL of ESRD patients on hemodialysis.
방화석고보드를 적용한 모듈러 보의 최적 내화성능 형상조건 도출을 위한 해석적 연구
김형준(Kim Hyung-Jun),김흥열(Kim Heung-Youl),이재승(Lee Jae-Sung),조봉호(Cho Bong-Ho) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.7
The study was intended to conduct the heat transfer analysis of the structural elements that serves the basis of performance-based fire resistance evaluation which has been widely implemented by the fire-related institutes (BRE, SP, NIST etc) in advanced nations, thereby carrying out the element temperature evaluation and the effect of heat characteristics under the standard fire condition (ISO). Based on this, an analytic study aimed to develop the performance-based fire-responding temperature control and improve the shape of the elements under the nonlinear stress condition in fire was carried out. The study to identify the optimal shape condition was conducted in an effort to develop the reliable fire resistance performance of the modular beam. This heat transfer analysis was conducted prior to carrying out the costly fire test so as to provide the numerical analysis technology enable to repeat the process, and based on data from the preceding test for material properties depending on temperature of component material, analysis modeling was implemented. ABACUS 6.7.1, an analysis program using finite element analysis method was employed as interpretation software to predict the fire resistance performance through the maximum temperature analysis of the modular beam, which enables to determine the optimal interval of modular beam and the thickness of fire-resistant gypsum board. And the verification experiment was followed based on the result of the analysis outcome. It was determined to use 30㎜ thick fire?resistant gypsum board for optimal fire resistance, and it was found to be able to grant the 180-minute fire resistance under the standard fire condition when the interval was set as 30㎜.
김형준(Kim, Hyung-Jun),김흥열(Kim, Heung-Youl),김경옥(Kim, Gyeong-Ok) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.추계
The major cause of Concrete Spalling at high temperatures can be divided into the Vapor Pressure Rising, caused by the increase in free water temperature within the concrete, and Pore Pressure Rising induced by the vapor moving into dense pores within the concrete. Although the occurrence of spalling within concrete caused by these pressure increases can be assessed experimentally, a close examination into Mechanistic influence against various spalling factors shall be carried out first by using Mathematical Modeling and Theoretical Equations. The Spalling Prospect Process by theoretical mechanism is expedited in order of the following; selection of heating condition (fire strength and flame heating direction), a selection of constituent elements, an analysis of heat transmission, an analysis of moisture movement, distribution of water content, an analysis of pore/vapor pressure, and assessment of spalling occurrence.
표준화재 재하조건 이방향 중공슬래브의 화재거동에 관한 실험적 연구
김형준(Kim, Hyung-Jun),여인환(Yeo, In-Hwan),김흥열(Kim, Heung-Youl),조경숙(Cho, Kyung-Suk),김정현(Kim, Jeong-Hyun) 한국화재소방학회 2010 한국화재소방학회 학술대회 논문집 Vol.2010 No.추계
기존의 무량판 구조와 동일한 이방향 슬래브구조인 TVS(two-way void slab)공법은 구조적 하중지지 성능이 불필요한 슬래브 단면상의 중앙부 콘크리트를 제거하여 슬래브의 자중을 줄이고 무량판 구조의 단점을 보완하여 장점을 극대화시킨 구조형식이다. 그러나 이러한 장점을 보유한 공법을 현장적용하기 위해서는 내화성능평가를 통해 화재안전성을 확보하여야 하므로, 이에 대한 화재 실증실험을 수행하여 현장적용을 위한 최소 요구내화 시간에 따른 내화성능 확보방안의 도출이 제시되어야 한다. 이에 본 연구에서는 TVS공법의 실제 스팬길이로 슬래브 피복두께에 따른 화재거동 영향성 분석을 위하여 화재실험을 수행하였다. 하중조건은 고정하중과 적재하중을 고려하여 실험체에 등분포 조건으로 사전재하하였으며, 표준화재조건으로 재하가열 실험을 수행하였다. 슬래브의 화재가열 노출면으로부터의 깊이별 온도변화와 처짐변형 특성을 측정하였으며, KS F 2257-1 평가기준에 의거하여 슬래브의 내화성능을 평가하였다. 실험결과 피복두께 50 mm를 확보할 경우, EPS중공체로 제작한 실험체의 경우 약 2시간정도의 내화성능을 확보할 수 있는 것으로 나타났다.
철골철망 모르타르 보의 재하하중에 따른 내화성능변화에 관한 실험적 연구
김형준(Kim, Hyung-Jun),김흥열(Kim, Heung-Youl),조범연(Cho, Bum-Yean),여인환(Yeo, In-Hwan),민병렬(Min, Byung-Youl) 한국화재소방학회 2011 한국화재소방학회 학술대회 논문집 Vol.2011 No.추계
국토해양부령 제320호인 건축물의 피난 방화구조 등의 기준에 관한 규칙 제 3조에서는 내화구조에 관한 세부기준을 정하고 있다. 이러한 법정내화구조 중에서 철골철망 모르타르조의 피복두께에 따른 내화성능 변화를 분석하기 위하여, 본 연구에서는 고온 재하하중조건에서 내화실험을 수행하였다. 철골조의 피복두께를 50 mm <TEX>${\cdot}$</TEX> 60 mm <TEX>${\cdot}$</TEX> 70 mm로 변화하여 내화실험을 수행하였으며, 재하하중비를 변화시킴으로 동일 피복두께에서의 내화성능 변화를 분석하고자 하였다. 실험결과 단면소성모멘트 대비 하중비 0.4 조건에서의 철골철망 모르타르조의 내화성능은 180분이 나왔으며, 피난 방화구조 등의 기준의 별표 1에서 정하고 있는 내화구조의 성능기준 중 최대 내화성능시간인 3시간을 확보하는 것으로 나타났다.
김형준(Kim, Hyung-Jun),김흥열(Kim, Heung-Youl),김경옥(Kim, Gyeong-Ok) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.추계
The modular beam made of steel material is wholly responsible for the load stress of the structure, therefore securing the fire-resistant capacity of the steel beam is absolutely important. The economic efficiency achieved by minimizing the thickness of the fire-resistant board attached, is also essential at the same time. Accordingly, a study of optimization of the thickness and interval of fire-resistant boards shall be conducted side by side. Therefore, in this study we have anticipated fire-resistant capacity by using a general-purpose S/W for finite elements, ABAQUS(6.7.1), in order to propose the configurable conditions that can secure the optimal fire-resisting capacity of modular beam. As a result of this analysis, it was impossible to secure the fire-resistance capacity when directly attaching fire-resistant board(30mm) on the modular board in accordance with KS F 2257-1, and the fire-resistant boards were manufactured in shape of module in consideration of its installation interval rather than direct application.
터널 화재시나리오에 따른 콘크리트 PC패널 라이닝의 전열특성에 관한 해석적 연구
김형준(Kim, Hyung-Jun),김흥열(Kim, Heung-Youl),박경훈(Park, Kyung-Hoon),신현준(Shin, Hyun-Jun) 한국화재소방학회 2009 한국화재소방학회 학술대회 논문집 Vol.2009 No.춘계
This study was performed FE numerical analysis under 120-minute fire conditions, using the ABAQUS, a wide use software, on the basis of the test results by concrete tunnel lining fire strengths (ISO, RWS, and MHC). The concrete material test was to secure the material properties of concrete linings, which were numerical analysis input conditions. And then built the material properties, such as specific heat, heat transfer rate, heat expansion rate, density, elasticity coefficient and compression strength under high temperature conditions, as database at 20 <TEX>$^{\circ}C$</TEX> to 800 <TEX>$^{\circ}C$</TEX>, applying them to analysis as input values. As a result, the tunnel linings under RWS fire conditions saw fire temperature rose to maximum 1119 <TEX>$^{\circ}C$</TEX>at the location of 5 mm above a thermal surface, and saw surface temperature amount to 1214 <TEX>$^{\circ}C$</TEX> in the middle part.
표준화재 고온재하조건 철골철근콘크리트 보의 내화성능평가
김형준(Kim Hyung-Jun),김흥열(Kim Heung-Youl),조범연(Cho Beom-Hyun),여인환(Yeo In-Hwan),민병렬(Min Byung-Yeol) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
This study evaluates the fire resisting capacity of the beam of the legal fire resistance construction, which establishes the Article 3 of the Regulations on Escape and Fire Resistance of Buildings. There are a total of five structures that we consider as legal fireproof constructions, however, this study has a primary target of the reinforced concrete beam, and tests the fire-resistant performance depend on the covering depth of reinforce concrete. The results showed that it meets the three hours, the maximum statutory fire resistance time, if it was a load ratio of 0.4 and covering depth of 50㎝.