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개구부가 있는 현장타설 끼움벽의 내진성능에 관한 실험적 연구
이혜연(Lee Hye-Yeon),한병찬(Han Byung-Chan),윤현도(Yun Hyun-Do),최창식(Choi Chang-Sik) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Placement of Cast-In Place(CIP) shear walls within strategic bays of a structure appears to be a logical and economical method to strengthen a reinforced concrete frame and to stiffen a building in order to reduced architectural and mechanical damage In building construction, opening the shear wall is usually used for access and service line such as transportation and equipments It is known that the main parameters affecting structural behavior of shear wall with opening is Size, location, reinforcements and existence of openings This study investigates the seismic performance of cast-in place infilled shear walls with opening. Through the test results, it's been observed that a location and shape of the openings highly affects the movements of the fracture in the ratio of opening
개구부가 있는 현장타설 끼움벽의 내진성능에 관한 실험적 연구
이혜연 ( Lee Hye-yeon ),한병찬 ( Han Byung-chan ),윤현도 ( Yun Hyun-do ),최창식 ( Choi Chang-sik ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
Placement of Cast-In Place(CIP) shear walls within strategic bays of a structure appears to be a logical and economical method to strengthen a reinforced concrete frame and to stiffen a building in order to reduced architectural and mechanical damage, in building construction, opening the shear wall is usually used for access and service line such as transportation and equipments. It is known that the main parameters affecting structural behavior of shear wall with opening is size, location, reinforcements and existence of openings. This study investigates the seismic performance of cast-in place infilled shear walls with opening. Through the test results, it’s been observed that a location and shape of the openings highly affects the movements of the fracture in the ratio of opening.
이규석(LEE Kyu Seck),이혜연(LEE Hye Yun),정인혁(CHUNG In Hyuk) 대한체질인류학회 1994 대한체질인류학회지 Vol.7 No.1
간추림 축추골 치아돌기의 형태학적 특성을 알아보고자 한국인 축추골 90예를 대상으로 치아돌기의 높이와 너비 및 환주골 앞궁과의 관절면을 계측하여 다음과 같은 결과를 얻었다. 1. 축추골 치아돌기의 높이는 14.1±1.3mm였고 축추골 전체높이에서 차지하는 정도는 38.2±26%였다. 2. 축추골 치아돌기의 가로너비에서 아랫부분이 가는 빈도는 87.8%였고 가는 정도는 1.2±0.7mm였다. 앞뒤너비에서 아랫부분이 가는 예는 55.6%였고 가는 정도는 0.7±0.5mm였다. 반대로 아랫부분이 두꺼운 예는 가로너비가 12.2%였고 두꺼운 정도는 1.0±0.5mm였으며 앞뒤너비는 44.4%였고 두꺼운 정도는 0.6±0.5mm로 가로너비의 아랫부분은 앞뒤너비보다 두꺼운 예는 더 두꺼웠고 가는 예는 더 가늘어 두께의 변화가 컸다. 3. 환주골 앞궁과 연결되는 치아돌기 관절면의 크기로 최대길이는 8.9±1.7mm였고 최대폭은 7.1±1.6mm였으며 남자에서 컸다.
PAC 응집제 종류에 따른 조류가 포함된 상수원수의 부상분리효율 비교
박종원,민성기,이혜연,윤철종,이창한,Jong-Won Park,Seong-Kee Min,Hye-Yeon Lee,Churl-Jong Yun,Chang-Han Lee 한국환경과학회 2023 한국환경과학회지 Vol.32 No.5
This study used a batch DAF (dissolved air flotation) jar tester to evaluate the algae removal efficiency of alum and PAC coagulants during coagulation, flocculation, and flotation. Optimal coagulant dosages were 0.06 ~ 0.15 mL/L (12.0 ~ 26.0 mg Al/L,17%), 0.08 ~ 0.20 mL/L (10.0 ~ 24.0 mg Al/L, 12%), 0.25 ~ 0.30 mL/L (25.0 ~ 30.0 mg Al/L, 10%) for PAC, and 3.0 ~ 5.0 mL/L (81.0 ~ 135.0 mg Al/L, 2.7%) for alum. Turbidity of treated water was 1.0 ~ 2.0 NTU in optimal coagulation, flocculation, and flotation conditions for the four coagulants types. The amount of coagulant injected tended to decrease with increasing Al content in the coagulant, as follows : 17% PAC < 12% PAC < 10% PAC < 2.7% alum. Turbidity removal efficiencies were in the order of 12% PAC (93.6%) > 10% PAC (92.7%) > 17% PAC (91.3%) > 2.7% Alum (88.1%).