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화강석 건조물의 표면 거칠기별 초음파속도법에 의한 강도 추정
김정섭,신용석,김정훈 한국건축시공학회 2010 한국건축시공학회지 Vol.10 No.1
The mechanical properties of stone structures are generally characterized according to the strength of the stone used. An ultrasonic velocity method that does not damage cultural heritages is used to measure the strength of stone. However, there is no correction involved for surface roughness and thickness of the stone in the ultrasonic method currently used. In addition, a contact agent such as grease can cause contamination on the surface of a cultural heritage. Accordingly, this study suggests an indirect method of strength estimation formula for stone structures based on the surface roughness of the structure, its thickness, and the type of contact agent. ① Rock strength estimation formula using ultrasonic velocity method of dabbed finish : fsu = 30.51 Vp0.82 (R2=95)②Rock strength estimation formula using ultrasonic velocity method of harsh finish : fsu = 61.52 Vp0.32 (R2=92) 석조 건조물의 역학적 성질은 일반적으로 석재 강도의 관점에서 설명된다. 강도를 측정하기 위해서 문화재의 훼손이 없는 초음파속도의 측정 방법이 이용되고 있다. 현재 시행되고 있는 초음파속도법은 표면거칠기, 석재 두께 등에 대한 보정을 실시하지않고 있는 실정이다. 그리고 그리스와 같은 접촉재 사용으로 문화재의 표면에 오염이 발생할 수 있다. 따라서 본 연구에서는 석조 건조물의 강도를 간접법으로 추정하기 위하여 석재 표면거칠기, 석재두께, 접촉재의 종류, 초음파속도 측정방법 등을 주변수로 석재 간접법 강도 추정식을 제안한다. ① 잔다듬 석재 초음파속도법에 의한 강도 추정식 :[수식] ② 거친다듬 석재 초음파속도법에 의한 강도 추정식 :[수식]
김정섭,권인혜 한국농촌지도학회 2010 농촌지도와 개발 Vol.17 No.3
This study aimed to find the way to help participants build capacity in rural development projects, through some case studies and Q-methodology. Decentralization and diffusion of bottom-up approach in rural development projects are the main contextual factors in this study. With the ethos of bottom-up approach in rural development, the human and financial inputs for capacity building increased drastically in the area of rural development policy. Four types of capacity building methods were identified in this study; training,consulting, learning organization, and forum. Theses methods were used more at planning step than implementation step in rural development projects. The government’s effort to strengthen leadership in rural areas should be continued. The existing government’s training program for capacity building had better include more diverse clients. Actions for capacity building should be centered on the needs of the participants in fields. Especially, organizing learning units is very important. Governments’ rural development policy should establish the proper process which can help local actors plan their projects with enough time span.