• Journal of the Korean Geotechnical Society
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• v.21 no.7
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• pp.73-80
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• 2005

There are several major practical consequences of stress-dependent properties of unbound pavement foundations. Among those are the stress-dependent modulus and Poisson's ratio's that may change, the compressive stresses that are generated in materials under load, the stiffening and strengthening effect of repeated loading to progressively increase the unbound pavement materials resistance to permanent deformation. In order to study these, the algorithm for predicting deformations on conventional flexible pavements are proposed and the stress-dependent effects on layer deformation are presented in this paper by the developed stress-dependent finite element analysis program with the selected models.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.1D
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• pp.73-82
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• 2011

Generally, an unsaturated condition was not considered to predict the long-term strength and drainage behaviors on compacted road foundations. However, it is logical way to consider the unsaturated condition and hysteresis behavior on road foundations like subbase and subgrade. For more quantitative analysis, rational experimental approach requires proper laboratory tool and material model, and hydraulic properties of pavement geomaterials under unsaturated conditions. In this study, therefore, laboratory data from the soil-water characteristic curve tests were used to predict suction and unsaturated permeability on pavement foundations and the results were analyzed based on the nonlinear fitting model considered. In addition to that, the unsaturated moisture capacity of each material is discussed.

• International Journal of Highway Engineering
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• v.10 no.1
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• pp.63-74
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• 2008

Resilient deformation characteristics on unbound pavement materials have been adopted for design and nonlinear analysis of pavement structure under traffic loadings. However, relatively few studies have been done on the nonlinear resilient behavior of unbound pavement materials in Korea. In addition, only the limited information is available for estimating the resilient modulus values on unbound materials. In this study, a laboratory resilient-deformation test under repeated loadings is performed in order to fud a proper constitutive model that correlates the resilient modulus with stress state from field condition. Finally, a finite element analysis is conducted for evaluating the nonlinear characteristics of unbound materials. and the pavement performance respectively.

• Journal of Korean Society for Geospatial Information Science
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• v.7 no.2 s.14
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• pp.15-22
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• 1999

New Address System have been defined by section belonging to a road To manage this New Address System the relationship between road and section must have consistency and convenience. So, It have to be designed not only logical relation but physical relation for The relationship between road and section. To make New Address Management System considered the relationship, It must be design database considered the relationship. In this study, therefore would like to present the database design considered the relationship between road and section. And then using GSIS system, New Address Management System have been developed.

• 한국도로학회지:도로
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• v.3 no.4 s.10
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• pp.52-53
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• 2001

• 도로교통
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• s.97
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• pp.4-13
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• 2004

• Journal of the Korean Geotechnical Society
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• v.23 no.3
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• pp.15-24
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• 2007

This paper will present a simple approach (or predicting layer deformation of unbound pavement materials with stress-dependent material properties. The approach is based on an uncoupled formulation in which the resilient and deformation response of unbound materials are considered separately. As a result, an uncoupled approach incorporating a resilient stiffness and Poisson's ratio model is able to simulate field measured deformation in pavement foundations. In addition, a sensitivity analysis is conducted to identify the significant factors in the stress-dependent modulus and Poison's ratio model. The predicted trends of deformation from this analysis are presented and discussed.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.325-328
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• 2003

폴드와 타 동유럽국가들이 내년에 유럽연합(EU)에 가입할 예정이다. EU에 가입한 후 폴란드는 도로분야의 투자에 박차를 가한 것이며 2005년까지 도로망을 보수할 것이다. 현재 폴란드 정부가 도로의 모든 건설투자 비용을 충당할 수 없으므로 민${\cdot}$관 협력에 기초하여 프로젝트 자본조달에 관한 새로운 방법을 발전시키고자 한다. 고도로 개발된 도로 교통망 없이는 국가 경제측면에서 경쟁력을 제고할 수 없으므로 EU 전체의 도로 교통망을 도입 하고자 한다. 도로 교통망의 성공적인 확대는 폴란드와 같이 아직 EU에 소속되지 않은 동유럽 국가의 교통 기반시설의 기초가 될 것이며 이것은 전채유럽의 이익을 가져 올 것이다.

• 한국도로학회:학술대회논문집
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• 2011.03a
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• pp.205-209
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• 2011

• 한국도로학회:학술대회논문집
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• 2010.09a
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• pp.483-488
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• 2010