• Title/Summary/Keyword: Geotechnical structure

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A study on the topographical and geotechnical effects in 2-D soil-structure interaction analysis under ground motion

  • Duzgun, Oguz Akin;Budak, Ahmet
    • Structural Engineering and Mechanics
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    • v.40 no.6
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    • pp.829-845
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    • 2011
  • This paper evaluates the effects of topographical and geotechnical irregularities on the dynamic response of the 2-D soil-structure systems under ground motion by coupling finite and infinite elements. A numerical procedure is employed, and a parametric study is carried out for single-faced slope topographies. It is concluded that topographic conditions may have important effects on the ground motion along the slope. The geotechnical properties of the soil will also have significantly amplified effects on the whole system motion, which cannot be neglected for design purposes. So, dynamic response of a soil-structure systems are primarily affected by surface shapes and geotechnical properties of the soil. Location of the structure is another parameter affecting the whole system response.

Applicable Road Design Method of Debris-Flow Control Structure (토석류 차단시설의 도로적용 설계 방안)

  • Lee, Yong-Soo;Kim, Jin-Hwan;Yu, Jun;Chung, Ha-Ik
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.09a
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    • pp.243-246
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    • 2009
  • Localized rainfall due to abnormal climate has caused extensive damages killing several tens to hundreds of people for yearly basis. The typhoon 'Lusa' of year 2002 has resulted 5,400 billion won of property damage and the damages for roads were approximated to be 2,860 billion won at 12,377 locations holding 53% damage of total. The recent typhoon, 'Aewinia' of yeat 2006 caused the 1,400 billion-won property damage including sweeping and flooding of 127 roads and 65 rivers, respectively. There are needs to minimize the damages for important structures for repeated heavy rainfalls every year and, especially, because debris flow might be a main cause of road damage, the design criteria and guideline for roads are required to be improved. Therefore, this paper presented design method of debris-flow control structure for road protection.

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Identification of Geotechnical Paramters Using Relative Convergence Measurements (상대변위를 이용한 지반정수 인식)

  • Choi, Sang-Hyun;Cho, Kook-Hwan
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.418-423
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    • 2005
  • In designing underground structure such as tunnels, estimating geotechnical characteristics of the ground is one of the most important and difficult tasks. In this paper, a methodology that can identify geotechnical parameters using only field-measured relative convergence displacements is presented. By using only relative convergence measurement data, inevitable errors in absolute convergence estimation can be avoided and in turn the parameter estimation process can be simplified. The methodology utilizes sensitivity relationship between static displacement measurements and geotechnical parameters. The feasibility and applicability of the proposed methodology is verified via a 3-d numerical example of a tunnel structure.

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A Study on Geotechnical Lineament Analysis by Image Processing Method (영상사진을 이용한 지반공학적인 선구조분석 연구)

  • 이수곤;금동헌
    • Proceedings of the Korean Geotechical Society Conference
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    • 2000.11a
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    • pp.593-600
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    • 2000
  • Most of ground investigations can be grasped geological distribution which like rock name, geological structure, soil condition, underwater condition, land slide, ground cave-in, ground collapse by geological survey. But geological survey is limited to part region geological structure, not wide region. Therefore, Image Processing Method must need to grasp wide region geological structure. The object of this research is presented analysis data of geotechnical engineering in first step investigation.

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Evaluation of Geotechnical Parameters Based on the Design of Optimal Neural Network Structure (최적의 인공신경망 구조 설계를 통한 지반 물성치 추정)

  • Park Hyun-Il;Hwang Dae-Jin;Kweon Gi-Chul;Lee Seung-Rae
    • Journal of the Korean Geotechnical Society
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    • v.21 no.9
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    • pp.25-34
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    • 2005
  • This paper proposes a selection methodology composed of neural network (NN) and genetic algorithm (GA) to design optimal NN structure. We combine the characteristics of GA and NN to reduce the computational complexity of artificial intelligence applications and increase the precision of NN' prediction in the design of NN structure. Genetic selection approach of design parameters of NN is introduced to obtain optimal NN structure. Analyzed results for geotechnical problems are given to evaluate the performance of the proposed hybrid methodology.

Development and Installation of Large-scale Geotechnical Testing Facilities (대형 지반시험장비의 개발 및 구축)

  • Seo, Min-Woo;Ha, Ik-Soo;Kim, Yong-Seong;Park, Dong-Soon
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.1233-1240
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    • 2005
  • As the geotechnical technologies have grown, the size of civil structures has become bigger than before, thereby requiring large-scale geotechnical testing equipments which can evaluate the mechanical behavior of large size testing materials such as gravel, crushed rock and so on. These kind of large testing equipments are usually used to evaluate the mechanical characteristics of large size material which are applied in the large infra structures like dam, seashore structure, coastal landfill, soil-structure interaction and seismic response of large-scale structure. In this research, state-of-the-art information in the field of geotechnical engineering was collected and summarized for such large-scale experimental equipments as large-scale geo-centrifuge, large-scale triaxial testing machine, large-scale direct shear testing apparatus and large-scale oedometer.

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Geotechnical Site Investigation for Designing of Tidal Power Plant Structures (조력발전 구조물 설계를 위한 지반조사;인천만 지반조사 사례)

  • Oh, Myoung-Hak;Lee, Kwang-Soo;Park, Jin-Soon;Yum, Ki-Dai;Cha, Dai-Wook;Yang, Geun-Hun
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.06a
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    • pp.613-616
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    • 2007
  • The main structures that comprise a tidal power plant are turbine structure, sluice structure, tide embankment and gate. Since these structures are founded on seabed ground, an extensive geotechnical site investigation to evaluate the engineering properties of field soils must be conducted prior to design and construction. According to the results of geotechnical site investigation conducted at the planned site for construction of Incheon bay tidal power plant, soft ground generally lie 7 meters below the seabed surface level. This research suggests the reliable and economical design of foundations and ground improvements required for construction of main structures in Incheon bay tidal power plant, with considerations on field conditions.

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The 3rd National Conference Of Professional engineers - On Geotechnical Structure Risk & Hazards (제3회 전국기술사대회 특집(토목시공) - 지반구조물 재해 및 위험분석 연구)

  • Yoon, Gil-Lim
    • Journal of the Korean Professional Engineers Association
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    • v.42 no.4
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    • pp.30-33
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    • 2009
  • Great concerns on geotechnical risk & hazard assessment have increased due to human and economic damage by natural disasters with recent global climate changes. In this paper, geotechnical problems in particular, landslide which is interested in European countries and North America, were mainly discussed. For these, 18 key topics on geotechnical risk and hazards which had been discussed at the LARAM 2008 workshop in Italy were analyzed after grouping by subjects. Main topic contents consisted of applications such as field measurement, early warning systems, uncertainty analysis of parameters using radar, optical data and statistical theory and so on.

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Finite Element Analysis of Engineering Restoration of Dry Stone Wall Foundations (석조문화재 기초부의 공학적 복원을 위한 유한요소법 해석)

  • Kim, Sung-Su;Jung, Young-Hoon;Kim, Soo-Il;Lee, Kwang-Wu
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.09a
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    • pp.1130-1141
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    • 2010
  • Even though a number of historic structures in Korea need to be repaired, an intensive research on their engineering performance has rarely been investigated. Herein, we attempted to provide a methodological approach via the explicit finite element analysis to investigate geotechnical aspect of the performance of the dry-stone wall structures. To do so, we summarized relevant literature on the world-wide historic stone structures as well as its analysis in terms of modern geotechnical engineering. The method of the explicit finite element analysis has been briefly summarized. The numerical results on an idealized block structure show that the displacement of blocks and the distribution of earth pressure is different from the conventional theory of the retaining wall because of the discrete nature of the dry-stone wall structure.

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