토목섬유 구조의 거동에 대한 수리모형실험 및 수치해석

심도식(Do Sik Shim)(沈度植),이종호(Jong Ho Lee)(李鍾昊) 위기관리 이론과 실천 2013 Crisisonomy Vol.9 No.11

본 연구는 토목섬유 구조체의 해안선 적용성을 알아보기 위한 수리모형실험 및 수치해석적 연구이다. 수리모형실험은 토목섬유 구조체를 설치한 경우와 일반 토목섬유 구조체를 설치하지 않은 경우, 투수성을 개량한 토목섬유 구조체를 설치한 경우 3가지에 대하여 실시하였다. 실험결과 개량된 토목섬유 구조체를 설치한 경우 해안침식 방지효과가 발현되는 것으로 확인되었다. 한편, 토목섬유 구조체의 모래충진시 거동을 알아보기 위한 수치해석 결과 모래충진시 전단응력은 구조체 하부 측면방향으로 집중되었으며 상재하중의 영향으로 구조체 하부에 응력이 증가되는 것으로 분석되었다. 또한 뒷채움지 구조체 배면하부에서 전단응력이 증가하였고 뒷채움 하중의 영향으로 측면만곡부에서 변위증가가 최대로 발생되었다. The objective of this study is to investigate coastal applicability of geotextile through numerical analysis and hydraulic model exeperiment. Hydraulic model exeperiments were conducted in three cases: gexotile installed, normal geotextile installed, and modified geotextile permeability. Test result shows that installation of geotextile has prevention effect for costal erosion. Furthermore, in numerical analysis results to investigate behavior of geotextile in case of sand filing, shear stresses concentrate and increse the lateral direction under the geotextile as effect of overburden load. Also, shear stresses increase under the backface of backfill structure and displacement was occurred the maximum value at the side flexure as influence of backfil load.

바이오화학 에코소재를 이용한 생분해성 고분자 개발 및 응용

심도용(Do Yong Shim) 한국고분자학회 2024 한국고분자학회 학술대회 연구논문 초록집 Vol.49 No.1

암석 제물성간의 상호 관련성에 관한 연구

심도식,박병수,이종호 도립 강원전문대학 2000 道立 江原專門大學 論文集 Vol.3 No.-

This thesis is results of research about correlations between physical characteristics of rock distributed around Kangwon Province in Korea. Experimental data obtained from laboratory and field tests have been collected and rock properties about 21 items were analyzed statistically to find correlations between them. From analyzed results, uniaxial compression strength and tensile strength are highly correlated to each other with R-squared value of 0.95, and tensile strength is about 1/10 of uniaxial compression strength. Two different rock quality classification systems of Q and RMR show a high value of correlation such as 0.92 of R-squared value since they have many common items in classifying the quality of rock mass. Relations between P-wave velocity and absorbing rate of water in rock, Q value and RQD, RQD and RMR, and unit weight of rock and P-wave velocity show relatively strong correlations with higher R-squared value than 0.85. Therefore, such correlations between rock properties can be used to evaluate the rock properties in designing structures in rock mass. However, rock properties have relatively low correlation with rock quality classification system, showing scattered distribution of data to find correlations between them, because they are quite dependent on types of rock and geological characteristics of rock mass. Therefore, classification of rock types and their locality should be performed in advance of evaluating their correlations.

복개터널 역해석에 의한 지반물성값 추정에 관한 연구

심도식,박병수,이종호 도립 강원전문대학 1999 道立 江原專門大學 論文集 Vol.2 No.-

This paper is a research about back analysis which optimizes uncertain geotechnical properties from the data measured during geotechnical design and construction. Various numerical optimization algorithms were applied to the excavation problem to determine which method showed the best results with respect to robustness of success in finding an optimal solution to within a certain accuracy and number of function evaluations. The results of back analysis of elastic modulus and Poison's ratio are agree with exact values with a little difference. Therefore, it is known that this study can be efficiency applied for estimating unknown parameters.

줄눈 콘크리트포장의 우각부 하중 해석

심도식,이주형,윤경구 도립 강원전문대학 1998 道立 江原專門大學 論文集 Vol.1 No.1

This study focused on the development of an alternative stress estimation procedure to instantly calculate the critical stresses bonded concrete pavement. Closed form analysis is commonly used to analyze pavement structures. This type of analysis assumes linear elastic material properties and static loading conditions. The well-known ILLI-SLAB finite element program was used for the analysis. Bonded concrete overlay analyzed the stress distribution, behavior and load carrying . capacity under track load is made evaluation standard of bonded concrete overlay. In the study, the following results were derived ; The properties of strength is that compress and 3-point bending strength of existing pavement is deteriorated with 184 ㎏/㎠, 59 kg/㎠ but compress and splitting tensile strength of overlay is satisfied with 465 ㎏/㎠, 45 kg/㎠. Load transfers is happen at adjacent slab by interlocking under track load. The stress distribution under interior, corner and edge load is described high loading position surrounding then loading position.

祈禱와 對話의 精神 : 工夫와 事業推進을 爲한 序說

沈道正 圓光大學校 敎學硏究會編 1966 교학연구 Vol.2 No.-

보육교사의 주도적 성향, 문제중심 대처행동이 내면 및 표면 정서노동에 미치는 영향: 문제중심 대처행동의 매개효과를 중심으로

심도현(Shim, Do-Hyun) 한국영유아보육학회 2021 한국영유아보육학 Vol.- No.128

학부모와의 관계에서 정서노동 가능성이 높은 보육교사를 대상으로, 내면과 표면행위의 정서노동에 대한 보육교사의 주도적 성향과 문제중심 대처행동의 영향력을 인과적 경로모형을 토대로 살펴보았다. 자료는 A지역에 근무하는 어린이집 교사 178명을 대상으로 했으며, 자기보고식 질문지를 통해 수합된 자료는 SPSS 21.0과 AMOS 10.0 프로그램의 Pearson 상관관계, Structural Equation Modeling(S.E.M.), Sobel test를 통해 분석되었다. 분석 결과 CFI, RMSEA 등 모델 부합도 지수는 기준치를 모두 충족하는 것으로 나타났다. 첫째, 보육교사의 주도적 성향은 문제중심 대처행동에 영향을 미치는 것으로 나타났다. 둘째, 보육교사의 주도적 성향은 내면 및 표면행위의 정서노동에 영향을 미치는 것으로 나타났다. 셋째, 보육교사의 문제중심 대처행동도 내면 및 표면행위의 정서노동에 영향을 미치는 것으로 나타났다. 넷째, 보육교사의 주도적 성향은 내면행위의 정서노동에 직접 영향과 함께 문제중심 대처행동을 매개로 간접 영향을 미치는 것으로 나타났다. 반면 보육교사의 주도적 성향은 표면행위의 정서노동에 직접 영향을 미치지 않지만 문제중심 대처행동을 매개로 간접 영향을 미치는 것으로 나타났다. The purpose of this study was to explore the path model among child care teacher’s proactive personality, problem-oriented coping behavior, deep/surface emotional labour using Structural Equation Modeling(S.E.M.). The path model were examined the mediation effect of problem-oriented coping behavior between proactive personality and deep/surface emotional labour. The data were collected from 178 child care teachers working in Area A, and the self-report questionnaire was analyzed through Pearson correlation, Structural Equipment Modeling (S.E.M.), and Sobel test in the SPSS 21.0 and AMOS 10.0 programs. Analysis shows that model conformity indices such as CFI and RMSEA meet all the criteria. 1st, child care teachers" proactive personality has been shown to influence problem-oriented coping behavior. 2nd, child care teachers" proactive personality have been shown to affect emotional labor of deep and surface acting. 3rd, child care teachers" problem-oriented coping behaviors also affect deep and surface emotional labor. 4th, the proactive personality of child care teachers was found to have a direct impact on emotional labor of deep acting, as well as indirect impact on problem-oriented coping behavior. On the other hand, child care teachers" proactive personality does not directly affect emotional labor of surface behavior, but indirectly affects through mediating problem-oriented coping behavior.

콘크리트 포장의 하중전달 평가방법연구

심도식,이주형,이종호 도립 강원전문대학 1999 道立 江原專門大學 論文集 Vol.2 No.-

This type of analysis assumes linear elastic material properties and static loading conditions. The well-known ILLI-SLAB finite element program was used for the analysis. Closed form analysis is commonly used to analyze pavement structures. This type of analysis assumes linear elastic material properties and static loading conditions. The well-known ILLI-SLAB finite element program was used for the analysis. Bonded concrete overlay analyzed the stress distribution, behavior and load carrying capacity under track load is made evaluation standard of bonded concrete overlay. The purpose of this dissertation was to develop an evaluation system at joints of jointed concrete pavement using finite element analysis Program, a sensitivity analysis was Performed using ILLI-SLAB program with a selected variables which might affect fairly to on the performance of transverse joints. The most significant variables were selected from precise analysis. It was concluded that the variables which most significantly affect to pavement deflections are the modulus of subgrade reaction(K) and the modulus of dowel/concrete interaction(G), and limiting criteria on the performance of joints at JCP are 300pci, 500,000 lb/in. respectively.

라텍스 개질 콘크리트의 부착강도 특성에 관한 연구

심도식,이주형 도립 강원전문대학 2000 道立 江原專門大學 論文集 Vol.3 No.-

Achieving an adequate bond between repair and overlay materials and existing concrete is a critical requirement for durable surface repairs. Repairs and overlay to concrete pavements and bridge decks frequently fail prematurely due to bond deterioration between the old concrete and repair material. It is essential that the repair and overlay material achieve a strong band to the substrate and that subsequent stresses are not sufficiently great as to cause debonding. Repairs which have bond lines in direct tension have the greatest dependency on bonding. The bond strength of latex-modified concrete to normal portland cement concrete measured with direct pull-out test. Using 250×1100×1400mm concrete slab as the base concrete, an overlay of the latex-modified concrete is applied and cured similar to bridge deck and then tested in direct pull-out. The test results not only give values of the bond strength of the overlay tested but also clearly indicate whether the failure is in the bond interface or the materials tested.

Investigation of Tension Force in Stretch Forming of Doubly Curved Aluminum Alloy (Al5083) Sheet

심도식,백경윤,신광용,윤희석,이기용,김광호 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.4

Aluminum alloys, which are suitable for lightweight applications, are being applied widely in diverse industries, especially to the external bodies of automobiles, ships, and aircraft. The external bodies of these vehicles have a three-dimensional geometric shape with various double curvatures. However, aluminum sheets with double curvatures are difficult to form because of their elastic recovery characteristic, known as the springback effect. As a consequence, the stretch-forming process is widely used to reduce the springback phenomenon and to obtain the desired quality product. In the stretch-forming process for aluminum sheets, the stretching conditions should be precisely designed to achieve high accuracy and minimum product defects. In particular, thickness reduction and elastic recovery of the formed plate must be considered during the determination of the stretching force. In this study, the deformation of an aluminum plate according to the magnitude of a tension force was analyzed and an optimal tension force proposed, while considering changes in the mechanical properties of the formed material. FE simulations and experiments show that the proposed tension force can be used to manufacture doubly curved aluminum surfaces with minimum thickness reduction and high accuracy.