韓醫學的 五臟의 槪念과 民間療法

한상환 圓光大學校 行政大學院 1999 最高政策管理論集 Vol.16 No.-

유한요소 해석을 이용한 WUF-W 접합부 최적의 파단 예측 반응지표 선정

한상환,김영우,김태오,Han, Sang Whan,Kim, Young Woo,Kim, Tae O 한국지진공학회 2017 한국지진공학회논문집 Vol.21 No.5

The WUF-W moment connection is a pre-qualified connection that can be used for special moment frames specified in current seismic design specifications. Since the stress distribution near the connection varies according to access hole configuration, the cyclic performance of WUF-W connections is strongly affected by the access hole configurations. To evaluate the connection performance according to various access hole configurations, it is expensive to conduct experiments with many connection specimens. Instead, finite element analyses (FEA) can be performed. Throughout the FEA, stress and strain distribution in the connection can be monitored at each loading step. The purpose of this study is to construct nonlinear 3-dimensional FE models for accurately predicting the cyclic behavior of WUF-W connections. For predicting connection fracture using FEA, an appropriate response index detecting the incidence of connection rupture is proposed.

오미자(五味子) 전탕액(煎湯液)의 투여(投與)가 흰쥐의 혈청(血淸) cholesterol 대사(代射)에 미치는 영향(影響)

한상환,Han, Sang-Hwan 대한한방내과학회 1998 大韓韓方內科學會誌 Vol.19 No.1

It was investigated effect of Fructure schizandra chinesis Water extract on the white rat which was induced hypercholesterolemia by fatty diet. The results obtained were summarized as follows; Neutral lipid level in blood lipid was greatly decreased on the group being fed animal fat diet and Fructure schizandra chinesis Water extract, total cholesterol was decreased on the group being fed vegetative fat diet, HDL-cholesterol was shown that the group being fed vegetative fat diet and Fructure schizandra chinesis Water extract at a time more increased HDL-cholesterol in a little than the other group, and normal fat diet group show to highest figure,38.5mg/dl. Animal fat diet group is 20.75 mg/dl. but, the group being fed Fructure schizandra chinesis Water extract was increased to 31.00mg/dl. LDL-cholesterol had no difference between fat diet group and the group being fed Fructure schizandra chinesis Water extract.

고성능 섬유 보강 시멘트 복합체(HPFRCC)를 적용한 세장한 연결보의 내진거동 평가

한상환,권현욱,신명수,이기학,조영욱 한국지진공학회 2013 한국지진공학회논문집 Vol.17 No.6

The hysteretic behavior of diagonal reinforced coupling beams is excellent during earthquakes. However, construction of the diagonal reinforced coupling beams is difficult due to complex reinforcement details required by current code procedures (ACI 318-11). Due to the detail requirement, reinforcement congestion and interference among transverse reinforcement always occur during construction field. When the aspect ratio of the beam is large, the interference of reinforcement becomes more serious. The objective of this paper is to simplify the reinforcement details of slender coupling beams by reducing transverse reinforcement around the beam perimeter. For this purpose, high- performance fiber reinforced cementitious composites are used for making coupling beams. Experiments were conducted using three specimens having aspect ratio 3.5. Test results showed that HPFRCC coupling beams with half the transverse reinforcement required by ACI 318-11 provided identical seismic capacities to the corresponding coupling beams having requirement satisfying the requirement specified in ACI 318-11.

목표스펙트럼에 근사한 평균응답스펙트럼을 갖는 지반운동집단의 효율적인 선정방법

한상환,석승욱 한국지진공학회 2011 한국지진공학회논문집 Vol.15 No.5

본 연구에서는 지반운동 라이브러리에서 목표스펙트럼에 근사한 평균응답스펙트럼을 갖는 한 개 혹은 다수의 지반운동을 선정하는 효율적인 방법을 제안하고자 한다. 지반운동 선정 시 목표스펙트럼의 형상과 크기를 맞추어야 하는데 이 두 가지를 독립적으로 고려할 수 있다는 기존 연구결과에 따라 본 연구에서도 형상이 가장 유사한 지반운동을 찾고 크기를 맞추기 위하여 배율조정계수를 사용한다. 형상을 맞추기 위해 각 주기에서 목표스펙트럼과 지반운동 평균응답스펙트럼의 차이 값의 표준편차가 최소가 되도록 하여 선정하는 방법을 제안하였다. 형상이 결정된 후 그 크기를 맞추기 위해 본 연구에서 제안한 배율조정계수를 찾는 방법은 기존 연구와 달리 한번에 찾을 수 있도록 제안하였다. 40개의 지반운동 라이브러리로부터 제안한 방법을 이용하여 목표스펙트럼에 근사한 평균스펙트럼을 갖는 7개의 지반운동기록을 선정한 결과, 그 정확성과 계산소요시간에 있어 모두 만족할만한 결과를 보였다. This paper proposes an efficient method for selecting ground motions with the mean response spectrum matching a target spectrum. Since former studies reported that the shape and amplitude of the response spectra can be treated independently for selecting ground motions, this study first selects ground motions such that the shape of their mean response spectrum matches that of the target spectrum, then scales the ground motions. To select the ground motions best matching the shape of the target response spectrum, the standard deviation of the difference between the target response spectrum and the mean response spectrum of the selected ground motions needs to be minimized. Unlike the existing procedure, the scaling factor can be computed without iteration. Based on the selection results of 7 ground motions from a library of 40 ground motions, the proposed method is verified as an accurate and efficient method.

지반특성과 지진지역에 따른 보통모멘트골조의 내진성능평가

한상환,김인정 대한건축학회 2006 大韓建築學會論文集 : 構造系 Vol.22 No.7

The purpose of this study is to evaluate the seismic performance of Ordinary Moment Resisting Concrete Frames(OMRCF) which is designed and detailed in compliance with ACI 318(1999). Based on the test results of 3-story OMRCF, this study adopts capacity spectrum method to evaluate the seismic performance of the frame. The capacity curve was obtained from the experimental results of the 3-story OMRCF and the demand curve was established using the earthquake ground motions recorded at various stations with different soil conditions. Evaluation results show that the 3-story OMRCF can resist seismic loads of all seismic zones, 1, 2A, 2B, 3, and 4 with soil type SA and SB. For soil type SC, the specimen is satisfactory in seismic zone 1, 2A, 2B, and 3. For soil type SD, the OMRCF was only valid for seismic zone 1 and 2A.

Post-Northridge WUF-B 접합부의 거동

한상환 elsevier 2007 journal of construction steel research Vol.0 No.63

동적 P-△ 효과를 고려한 연성계수 ( Ductility Factor Considering Dynamic P-△ Effect )

한상환 대한건축학회 2000 大韓建築學會論文集 : 構造系 Vol.16 No.4

참가기 - 제12회 세계지진공학회의를 다녀와서 ( Twelfth World Conference on Earthquake Engineering ( 12th WCEE )

한상환 대한건축학회 2000 建築 Vol.44 No.3

현행 내진설계 규준의 수평강도 요구에 대한 평가

한상환,오영훈,이리형 한국전산구조공학회 1997 전산구조공학 Vol.10 No.4

현행 내진설계 규준에서 사용하고 있는 반응수정계수는 설계지진하중과 유사한 지진발생시 구조물이 비선형 거동을 하도록 탄성응답에서 요구되는 밑면전단력 값을 낮추는 계수라 할 수 있다. 따라서 반응수정계수는 하중저감계수(force reduction factor)라고 할 수 있으며, 이러한 값들은 경험적으로 결정된 것이어서 예상지진에 대하여 구조설계자가 설계한 건물이 어느정도의 비선형 거동을 할지는 예측하기가 힘들다. 본 연구에서는 목표가 되는 연성비(target ductility ratio)에 따라 요구되는 밑면전단력의 값을 구하고 이를 규준에서 요구하는 값과 비교할 것이다. 만약 요구되는 값이 규준 값 보다 크다면 이는 구조물이 가지는 부가강도(overstrength)나 잉여력(redundancy)이 담당해야 한다. 모멘트연성골조 건물을 설계한 후 이를 push-over 해석에 의하여 부가강도를 찾아 보아 요구강도와 비교할 것이다. Current seismic design code is based on the assumption that the designed structures would be behaved inelastically during a severe earthquake ground motion. For this reason, seismic design forces calculated by seismic codes are much lower than the forces generated by design earthquakes which makes structures responding elastically. Present procedures for calculating seismic design forces are based on the use of elastic spectra reduced by a strength reduction factors known as "response modificaion factor". Because these factors were determined empirically, it is difficult to know how much inelastic behaviors of the structures exhibit. In this study, lateral strength required to maintain target ductility ratio was first calculated from nonlinear dynamic analysis of the single degree of freedom system. At the following step, base shear foeces specified in seismic design code compare with above results. If the base shear force required to maintain target ductility ratio was higher than the code specified one, the lack of required strength should be filled by overstrength and/or redundancy. Therefore, overstrength of moment resisting frame structure will be estimated from the results of push-over analysis.