• Title/Summary/Keyword: 도로교량

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경부 고속철도 교량 건설공범 - 8-2공구를 중심으로 -

  • 황낙연;김창환
    • Journal of the Korean Society for Railway
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    • v.4 no.2
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    • pp.19-28
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    • 2001
  • 고속철도에서는 고속주행으로 인한 탈선을 방지하기 위하여 연직 또는 평면선형에 대하여 매우 엄격히 제한하고 있다. 종방향 경사는 2.5% 이하, 평면곡선반경에 대하여는 7,000 m 이상으로 규정하고 있으므로, 도로는 물론 일반철도에 비하여 교량구조물 발생은 더욱 증가된다. 한편 고속철도 교량은 구조물의 안전성 뿐만 마니라 승차감을 위하여 동적거동에 대하여 엄격히 제한된다. 또한 교량과 레일의 상호작용 등에 따라 무한장 개념의 레일에 악영향을 피하기 위해 교량의 종방향 변위도 제한되기 때문에 지간 장이 짧고 상판 구조물은 큰 강성을 갖게 된다. (중략)

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Database Design for Development of the GIS-based Earthquake Damage Evaluation System of Highway Bridges (도로교의 GIS 기반 지진피해평가체계 구축을 위한 데이터베이스 설계)

  • Lee, Sang-Ho;Kim, Bong-Geun;Jeong, Dong-Gyun
    • Journal of the Earthquake Engineering Society of Korea
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    • v.10 no.3 s.49
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    • pp.135-147
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    • 2006
  • The essential information elements for the Earthquake Damage Evaluation System (EDES) of highway bridges are defined in this study, and a database construction method, which fits the circumstances of Korea, is proposed. The information elements for the EDES of highway bridges are categorized in two groups: structure related information, location related information. The structure related information is composed of the fragility curve information which is necessary for earthquake damage evaluation of highway bridges. The data structure of road network, which represents the location related information, is defined in more detail than the existing GIS-based data structure of road network for modeling of junctions. A pilot GIS-based EDES subjected to 110 bridges on expressway in Korea is developed, and it is verified that the proposed database construction method for the EDES can be used to develop a decision making system for quick retrofitting of the seismic damages of highway bridges and road network.

Current Status and Analysis of PSC Bridge in Korea (국내 프리스트레스트 콘크리트 교량 현황조사 및 분석)

  • Son, Hyeok-Soo;Oh, Myung-Seok;Yoon, Cheol-Kyun;Kim, Ik-Su;Kim, Jin-Woo
    • Proceedings of the Korea Concrete Institute Conference
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    • 2010.05a
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    • pp.23-24
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    • 2010
  • In this research, the comparison and analysis of domestic prestressed concrete bridges were performed with major variations of superstructure type, and span lengths using the 'current status of roadbridge and tunnel' informations provided by MLTM and STATISTICS KOREA. As a result of analysis, steel box girder bridges with 50~100m span length represent about 76% of bridges, but prestressed concrete bridges represent a relatively smaller percentage. In order to replace steel box girder bridges with prestressed concrete bridges, it is necessary to develop prestressed concrete bridges with high-strength tendons and concrete.

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Development of Rating System for Highway Bridges (도로교 내하급수 판정시스템 개발)

  • Cho, Hyo Nam;Chang, Dong Il;Lee, Hee Hyun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.11 no.4
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    • pp.9-15
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    • 1991
  • This study is directed for the development of rational rating models for realistic safety assessment and the computer rating system for highway bridges. For this purpose, the conventional rating system is considerably improved in appropriate way, and a rational rating system based on the reliabilty method is proposed to estimate safety of deteriorated bridges by using only the visual inspection data or the statistical data available. In addition. the rating system which can assess the realistic allowable passing tonnage of military vehicles in case of the military operations is also presented. From this study, it is known that the presented rating system and the computer program BRS(Bridge Rating System) provide an effective tool which can handle the degree of deterioration and various uncertainities of the bridge systematically. so it can be used widely for assessment of safety and load carrying capacity of existing deteriorated or damaged bridges.

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Realistic Determination of Design Loads and Design Criteria for Bridge Structures (교량구조물의 합리적인 설계하중 결정 및 설계기준)

  • Oh, Byung Hwan
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.11 no.4
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    • pp.55-66
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    • 1991
  • Presented is a study on the realistic determination of design loads and design criteria for bridge structures. The current bridge design code does not consider realistically the uncertainties inherent in loads and resistances and thus the level of safety varies greatly among the bridge spans. The resonable bridge design loads and design criteria which exhibit uniform reliability among various bridge spans are therefore derived in the present paper. The proposed design loads are determined from the analysis of numerous data obtained from actual traffic survey and the design criteria are based on the advanced concept of load and resistance factor format. The live load factors take into account resonably the effects of traffic volume increase. The proposed design loads and design criteria show uniform safety level for various bridge spans and reasonably consider the effects of traffic volume increase. The present study provides useful and valuable data for new version of our bridge design code.

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Fire Damage Assessment for Steel-Concrete Composite and PSC Bridge Superstructures Using Heat Flow Analysis (열유동 해석을 이용한 강합성 및 PSC 교량 상부구조의 화재손상평가)

  • Park, Yang Heum;Yun, Sung-Hwan;Jang, Il Young
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.41 no.2
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    • pp.93-100
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    • 2021
  • The objective of this research is to evaluate of fire damage for steel-concrete composite bridge superstructure and PSC bridge superstructure under highway bridge exposed to fire loading. To enhance the accuracy and efficiency of the numerical analysis, the proposed heat flow fire analysis method is implemented in ANSYS. The proposed heat flow analysis method is applied to fire damage analysis and performance evaluation for Buchen and Yangsan highway bridge. The result of analysis, temperature of concrete slab and lower flange of steel-concrete composite bridge superstructure are exceed the critical temperature. Also, temperature of slab, lower and upper flange, web of PSC bridge superstructure are exceed the critical temperature. However, the major component, tendon, did not exceed the critical temperature.

Development of Statistical Truck Load Model for Highway Bridge using BWIM System (BWIM 시스템을 이용한 고속도로 교량 차량하중 모형 개발)

  • Park, Min-Seok;Jo, Byung-Wan;Bae, Doo-Byong
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.26 no.1A
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    • pp.143-153
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    • 2006
  • In design of bridges, estimation of actions and loadings is very important for the safety and maintenance of bridges. In general, effect of traffic loading on the bridge can be modeled as live load (including impact load) and fatigue load. For estimation of traffic loading, it is important to get reliable and comprehensive truck statistical data such as the traffic and weight information. To get statistical data, Bridge Weigh-In-Motion (BWIM), which measures the truck weights without stopping the traffic, is need to be developed. In this study, BWIM system with various functions is developed first. Then this system is used to get comprehensive truck data. Traffic loadings including fatigue and live loading are formulated from the truck data acquired from the bridges. Objectives of this study are to develop the BWIM system, to apply the system in test bridge in Highway, and to formulate the live and fatigue loading for bridge design.