• 제목/요약/키워드: Member evaluation

검색결과 593건 처리시간 0.027초

해양구조물 원통부재의 최종강도에 대한 손상의 영향 (Damage Effects on the Ultimate Strength of Offshore Tubular Members)

  • 백점기;신병천
    • 한국해양공학회지
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    • 제3권2호
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    • pp.577-577
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    • 1989
  • In this paper, a detail evaluation of ultimate strength of offshore unstiffened tubular members with bending and local denting damage which are subjected to combined axial force and bending moment and to component load is presented through theoretical and experimental approaches. Based upon the results obtained here, the damage effect on the ultimate strength of tubular member under combined loads and component load is investigated.

해양구조물 원통부재의 최종강도에 대한 손상의 영향 (Damage Effects on the Ultimate Strength of Offshore Tubular Members)

  • 백점기;신병천
    • 한국해양공학회지
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    • 제3권2호
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    • pp.77-86
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    • 1989
  • In this paper, a detail evaluation of ultimate strength of offshore unstiffened tubular members with bending and local denting damage which are subjected to combined axial force and bending moment and to component load is presented through theoretical and experimental approaches. Based upon the results obtained here, the damage effect on the ultimate strength of tubular member under combined loads and component load is investigated.

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Seismic Performance of In- Filled Steel-Concrete Composite Columns Using Fiber Analysis Method

  • Park, Jae-Young;Kim, Jin-Ho
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2005년도 봄학술 발표회 논문집(I)
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    • pp.427-430
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    • 2005
  • The study for seismic characteristics of square concrete-filled steel tubular (CFT) columns is analytically conducted. For predicting the strength and ductility of CFT columns, fiber analysis technique is used. The analytical results show reasonable agreement with experiment results. The influence of the steel tube on the lateral response of CFT columns is studied for the evaluation of seismic performance.

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10MW급 풍력발전용 원형강관 멀티기둥타워의 부재유용도 개념설계 (Member Utilization Concept Design for Hollow Circular Section Multi-column Tower Subjected to 10MW Level Wind Turbines)

  • 김경식;김미진
    • 한국강구조학회 논문집
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    • 제29권3호
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    • pp.205-215
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    • 2017
  • 본 연구에서는 10MW급 풍력하중을 받는 멀티기둥 타워시스템에 원형강관 부재의 구조안전성 및 경제성을 함께 검토하는 방식으로 부재 유용도에 근거한 개념설계의 예를 보였다. 단일 실린더형 타워를 대체할 수 있는 멀티기둥타워 구조의 구성에 관한 기본적인 가정을 정립하였고, 그에 따라 제안된 구조물을 모델링하고 해석하여 부재력을 확인하였다. 산정된 부재강도와 작용하중을 근간으로 제안된 멀티기둥타워의 각 부재별로 축력, 전단, 휨, 비틂에 대한 유용도가 산정되었고, 풍력타워로서의 적합성이 평가하였다. 멀티기둥 풍력타워의 개념설계에 채택될 수 있는 수준의 유용도 범위에서 강관 치수, 세장비 및 수평재 단수 등의 설계 매개변수를 제안하였다.

가정간호사 임상실무 훈련프로그램 개발과 평가를 위한 사전 연구 -정형외과 수술 환자를 중심으로- (A Preliminary Study on Development and Evaluation of Home Health Care Nurse Clinical Practice Program -Focused on Postoperative Orthopedic Patients-)

  • 서영숙
    • 대한간호학회지
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    • 제26권1호
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    • pp.15-32
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    • 1996
  • The clinical practice program for home care nurses was implemented in June 1994, to help to set up a hospital-based home care system in the Kwangju City area as a collaborative work between the Department of Orthopedic Surgery at Chunnam University Hospital and Chunnam University School of Nursing. Under the developed clinical practice strategy, the eight week training was given to five licensed home care nurses who had completed Part I and II of the home health care nursing practicum from June 1994. The purpose of this descriptive evaluation study was to identify the effectiveness of the clinical practice program for home care nurses specialized in the area of patient care for people with musculoskeletal function impairment. As a method in data analysis, data triangulation was used in the five home care nurse case evaluations. The variety of data analyzed include confidence score by home care nurse self-evaluation, patient and family member satisfaction scores, and competency score by preceptor evaluation. The study findings revealed that an increase rate in nursing performance didrate necessarily coincide with an increase not in competency score and also, not with the patient /family member satisfaction scores. And an order derived from the clinical performance scores of five home care nurses corresponded to those from three measurements-competency score, patient satisfaction score, and family member satisfaction score. However, it differed from the order associated with the confidence score. Consistency derived from the three objective evaluation methods may lead to the possibility that the level of competency measured by educator can be further explained by the levels of patient/family member satisfaction. The salient finding of this study was that, in case of nurse A who have had little clinical experience in the orthopedic patient care, there was a significant increase in the level of confidence and competency in subscale of professional skill with the home care clinical practice. Therefore, the effect of the clinical practice program would be successful for nurses who have had little experience in the area of specialization. The study results suggest that there might be some time difference in the development of cognitive sense (confidence) in performance and actual clinical performance (competency). In future research, relationships between the confidence and competency score, and between the confidence score and the patient satisfaction score should to be measured in different time frame to achieve a better explanation power of the study outcome.

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FRP-콘크리트 합성 바닥판의 윤하중 피로 성능 평가 (Evaluation of Wheel Load Fatigue Performance of FRP-Concrete Composite Deck)

  • 조근희;박성용;조정래;김성태;김병석
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2006년도 춘계학술발표회 논문집(I)
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    • pp.38-41
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    • 2006
  • Wheel load fatigue experiment is carried out on a FRP-concrete composite deck. In FRP-concrete composite deck, FRP plays a role of a main tensile member as well as a permanent formwork and concrete plays a role of a main compressive member. Wheel load fatigue experiment, which shows more realistic behavior than pulsating fatigue experiment, is selected as a fatigue performance evaluation method. Until 1,000,000 cycles of loadings, load resistant performance is maintained without any loss, while residual deflection is increased.

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농촌 주택붕괴 대비 방재쉘터의 부재 적정성 평가 - 수치해석을 중심으로 - (Appropriateness Evaluation of Rural House Collapse Prepare Disaster Shelter Member - Focusing on the Numerical Analysis -)

  • 오현문;김정면;이응범;임창수;김용성
    • 한국농공학회논문집
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    • 제59권5호
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    • pp.51-60
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    • 2017
  • This research is a basic study to minimize the risk of disaster (earthquakes and landslides) for rural residential houses. In this study, three-dimensional numerical analysis was performed by varying the diameter (D), thickness (T) and the spacing of longitudinal members (C.T.C) of duralumin and galvanized steel pipe as the materials of main members in order to carry out the analysis of the dimension and the applied load of shelter for disaster prevention, and to evaluate the eligibility of members that can satisfy safety and usability. From the evaluation results of the member eligibility by the above numerical analysis, it was found that duralumin has a great influence on the member diameter (D) and thickness (T), and in the case of galvanized steel pipe, its spacing of longitudinal members has a huge amount of influence over the member force, so it is considered that the duralumin and galvanized steel pipe materials can be used as materials for the main members of disaster prevention shelters in terms of safety and usability.

대공간 교육시설 축조를 위하여 개발된 T형 강재를 이용한 프리스트레스트 합성보의 안전성 평가를 위한 연구 (A Study for Safety Evaluation of the Prestressed Hybrid Beam with T-shape Steel Member which was Developed to Build Large Span Educational Facilities)

  • 이경훈;김태희
    • 교육녹색환경연구
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    • 제9권1호
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    • pp.32-40
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    • 2010
  • The purpose of this study was to evaluate structural safety and economic efficiency of prestressed hybrid beam using T-shape steel member which was developed to build large span educational facilities. Hybrid beam specimens were manufactured with 16.0m long and load was uniformly distributed by 12.0kN steel hexahedrons. In this study, honeycomb beam design process was introduced to T-shape section steel beam design. Vibration condition of specimens were analyzed by Korea Building Code 2009 and AISC Steel Design Guide Series-11. As a result, the prestressed hybrid beam with T-shape steel member has about 10.4% of cost reduction effect.

해석법 차이에 의한 프리스트레스트 콘크리트 보부재의 잔류변형률 비교 (Comparison of Residual Strain of Prestressed Concrete Beam Member by Different Analysis Method)

  • 이덕기
    • 한국지진공학회논문집
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    • 제21권4호
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    • pp.189-195
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    • 2017
  • In the seismic design of building structural members, due to the complexity of the placement of PC steels in prestressed concrete members, it is necessary to review and define the definition of member damage in comparison with reinforced concrete members. In this study, the results of past experiments compared with the calculation results by 'section Analysis Method', with the aim of reviewing the precision of calculation results when member damage evaluation is performed using the section analysis method. Furthermore, it is also compared with the calculation results by the 'split Element Method'. In addition, parametric studies were carried out, and the influence of the difference between the amount of PC steels and reinforced bar on the residual strain was examined.

원통 CFRP 구조재의 굽힘 특성 평가 (Evaluation of Bending Characteristics for Carbon FRP Structure having Circle Cross-section)

  • 김정호;김지훈
    • 한국생산제조학회지
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    • 제20권2호
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    • pp.202-206
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    • 2011
  • Works on the strength and stiffness in the structural members are carried out widely with various material and cross-sections with ever increasing safety concerns, they are presently applied in various fields including railroad trains, air crafts and automobiles. In addition to this, problem of lighting structural members became important subject by control of exhaust gas emission, fuel economy and energy efficiency. So, Light weight of member structures is necessary for the high performance and various functions. In this study, the CFRP flat and circular member was manufactured by CFRP prepreg sheet in autoclave. Carbon FRP is an anisotropy material whose mechanical properties change with its fiber orientation angle, so this study apply to the effects of the fiber orientation angle on the bending characteristics of the member. Each CFRP flat and circle are compared by strength and stiffness.