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수치해석을 이용한 흙막이벽체의 사보강버팀보에 적용하는 축강성에 대한 현장 적용성 연구
이영진,이성규,이강일,Lee, Yeong-Jin,Lee, Soung-Kyu,Lee, Kang-Il 한국지반신소재학회 2022 한국지반신소재학회 논문집 Vol.21 No.2
Unlike the horizontal strut, the corner strut causes bending behavior by the installation angle when soil pressure occurs, so there is a limit to its application as a elasto plastic method that requires only the axial stiffness of struts. Therefore, this study attempted to approach a method of modifying axial stiffness data to present an analysis method for corner struts in elasto plastic method, and linear elasticity analysis was used for this. And, through Linear elasticity analysis, axial stiffness data for corner struts installed at the actual site were calculated. The behavior of the retainingwall was confirmed by applying the calculated axial stiffness data of corner struts to elasto plastic method, and its applicability was evaluated by comparing it with the measurement results and the finite element analysis results. As a result of the study, when the axial stiffness data of the corner struts was applied using Linear elasticity analysis(Case 1, Case 3), the axial stiffness data decreased to 9% to 17% compared to the general method of applying the axial stiffness of the struts(Case 2, Case 4), and the displacement of the retainingwall increased to 25.33% to 64.42%. Comparing this result with the measurement results, when Linear elasticity analysis was used(Case 1, Case 3), the behavior of the retainingwall during the elasto plastic method was better shown.
대기오염 피해지역의 산벚나무 임분내 내성 및 감수성 개체의 유전적 차이
이석우,우수영,구영본,이성규 ( Seok Woo Lee,Su Young Woo,Yeong Bon Koo,Soung Kyu Lee ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.1
The estimates of genetic diversity based on 7 polymorphic loci coding for 6 isozymes were compared between the tolerant and the sensitive trees in an air polluted Prunus sargentii stand located on Ulsan industrial area. Although we could not observe statistically significant differences in allele and genotype frequencies between the two groups except the gene locus Got-2, the unique alleles and genotypes were observed in the tolerant group. All the genetic parameters such as genetic multiplicity, genetic diversity, and heterozygosity revealed that a greater amount of genetic variations existed in the tolerant group.
4년생 우리나라 사시나무 클론의 수고유전력 (樹高遺傳力) 및 개량효과
노의래(Eui Rae Noh),이성규(Soung Kyu Lee),구영본(Yeong Bon Koo),변광옥(Kwang Ok Byun) 한국산림과학회 1994 한국산림과학회지 Vol.83 No.2
The broad sense heritability of height of clonal means was estimated from 18 clones out of 25 clones growing at four different sites, and it showed considerably high heritability of H²_(CM)=0.883. Therefore if we select the best one clone(5% selection), the genetic gain of 35.3% which is equal to 1.02m in height is expected to attain. If we select the best two clones(10% selection), the genetic gain will be 25.6 which is equal to 0.74m in height. Because the trees are only 4-year-old, it is expected to show higher genetic gain than the current gain when the trees reach to the age of final selection.