감소계수의 상호작용을 고려한 지오그리드의 장기성능 평가 및 해석

Title
감소계수의 상호작용을 고려한 지오그리드의 장기성능 평가 및 해석
Authors
김원춘
Keywords
감소계수의상호작용을고려한지오그리드의장기성능평가및해석
Issue Date
2012
Publisher
인하대학교
Abstract
Abstract Geogrids made of high polymers are increasingly being used for reinforcement recent days in civil engineering. However, most geogrids show only 6-7% of tensile force of maximum tensile strength due to the conventional design while in practical application, which acts as a factor of a lowering of price competitiveness that is a unique advantage of geogrids. The cause of conventional design results from consideration of a safety factor in terms of civil engineering and uncertainty of long-term property of materials. Total reduction factor that is used when calculating allowable tensile strength of geogrids is made by multiplying the installation damage reduction factor, chemical degradation reduction factor, and creep reduction factor etc. Installation damage reduction factor may be changed by specification of filling materials in same construction conditions while chemical degradation reduction factor can be affected by destruction of coating materials cause of installation da
Description
Contents List of Tables List of Figures Abstract 1 요약 3 1. INTRODUCTION 5 2. THEORETICAL BACKGROUND 6 2.1 Type of geogrids 6 2.2 Mechanical properties 10 2.2.1 Tensile strength 10 2.2.2 Junction strength 11 2.2.3 Shear strength 14 2.3 Evaluation method of long-term design strength 17 2.3.1 Allowable strength considerations 17 2.3.2 Installation damage 18 2.3.3 Chemical degradation 21 2.3.4 Creep behavior 23 3. EVALUATION OF SHORT-TERM AND LONG-TERM PROPERTIES OF GEOGRID 37 3.1 Preparation of geogrids 37 3.2 Test for the tensile and junction properties of geogrid 39 3.2.1 Review of junction test and new procedure to test 39 3.2.2 Experimental 41 3.2.3 Results and discussion 44 3.2.4 Conclusion 58 3.3 Prediction of installation damage reduction factor through analysis of filling material particles 59 3.3.1 Review of installation damage test and new procedure to test 59 3.3.2 Experimental 62 3.3.3 Results and discussion 66 3.3.4 Conclusion 76 3.4 Evaluation of chemical resistance of notched geogrids 77 3.4.1 Review of chemical resistance test and new procedure to test 77 3.4.2 Experimental 78 3.4.3 Results and discussion 80 3.4.4 Conclusion 85 3.5 Assessment of creep characteristics by limited strain and rupture 86 3.5.1 Review of creep test 86 3.5.2 Experimental 88 3.5.3 Results and discussion 94 3.5.4 Conclusion 104 4. REASSESSMENT OF REDUCTION FACTORS FOR LONG-TERM PROPERTIES OF GEOGRIDS 105 4.1 Review of interaction between reduction factors 105 4.2 Experimental 109 4.3 Results and discussion 113 4.4 Conclusion 136 5. CONCLUSION 138 REFERENCES 141
URI
http://dspace.inha.ac.kr/handle/10505/23430
Appears in Collections:
College of Engineering(공과대학) > Applied Organic Materials Engineering (유기응용재료공학) > Theses(유기응용재료공학 석박사 학위논문)
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