특허청세미나 교량구조물의신기술동향 2005. 7. 11 중앙대학교건설대학토목공학과 심창수
목 차 교량건설환경의변화 건설관련연구의실용화 - 급속시공및교체공법 - 신재료적용 - 합성구조교량 향후의교량신기술전망
교량건설환경의변화 Minimizes traffic impacts of bridge construction projects ( 신설 교체 ) Improves construction zone safety ( 복잡한공간에서의작업증가 ) Makes construction less disruptive for the environment ( 환경문제에민감 ) Makes bridge designs more constructible ( 시공성증대가관건 ) Increases quality and lowers life-cycle costs ( 유지관리경비절감노력 )
교체공사수요의증가추세 교량건설환경의변화 - Decrease of Newly Constructed Bridges - Increase of Rehabilitation Needs -Economy!
교량건설환경의변화 Increase of Deteriorated Bridge Decks in Korea
- Needs for Rapid Replacement of Deteriorated Bridge Decks 교량건설환경의변화
공사환경의안전성증대 교량건설환경의변화 - 고공시공 ( 계곡, 바다등 ) - 도심지시공
환경문제에민감 교량건설환경의변화 - 자연환경친화적공법수요증가 - 민원제기최소화를위한공법수요 Linn Cove Viaduct (NC)
건설관련연구의실용화 Convert to Forms Needed by End Users Calibrate / Validate / Consensus/ Test Applications Basic Research by Researchers Design Innovation by Industry Leaders Spanning the Implementation Gap
건설분야신기술개발의단계 건설관련연구의실용화 원천기술 - 재료 - 시공기술 - 구조개념 - 타분야신기술 특수성 기술권확보 - 특허 - 실용신안 - 신기술 실용화 - 시험시공을통한현장적용 - 사업수주를위한실용화 - 사회간접자본시설물의중요성으로인하여보수적인기술환경 - 수요자가국가인경우가대부분으로기술의수혜자가불분명 - 개발기술이이익으로직접적으로연결되지않음 - 아이디어에서시험시공을통한실용화로이르는경비및기간과다 - 단기아이템으로상당한기술료확보가가능 - 국제적인기술경쟁에서중요한역할을수행할수있음
급속시공및교체공법 신재료적용 합성구조교량및구조물
급속시공및교체공법 기초 하부구조 ( 교각및코핑 ) 상부구조 일괄가설형 (SPMTs)
Substructure Piles also used for Pier columns Precast Pier Cap Precast Piers
Substructures: Bent Caps Cross Bay Boulevard over North Channel Cylinder piles Precast pier caps forms Prestressed I Beams Precast diaphragm forms Prestressed sub-deck panels Precast Barriers
Pier
Substructures SH 36 over Lake Belton (TX) Precast bent caps precast prestressed deck panels precast prestressed U-beams water level is highly variable (48ft) multi-column bent cap connections to single-column, high-moment-demand connections and to continue development of specifications addressing grout placement, segregation, and durability Twin bridges, 3,840 feet long with 62 identical precast interior bent caps
Substructures: Pier Sunshine Skyway (Florida) Approach Spans, 36.5 m Tall Piers Post-Tensioned with Looped PT Tendons
Precast Column Method Precast columns are assembled onsite using PC steel members and reinforcing rods. Compared with the cast-in in-situ method, this method remarkably shortens the site work period. Pier segment being transported by a trailer Pier segment being joined Segment section with circular holes for inserting reinforcing rods
Totally Prefabricated Bridges Baldorioty de Castro Avenue Overpasses (Puerto Rico) Precast bent caps precast prestressed deck composite units precast box piers 700~900ft Bridge : 21~36Hours
대형장비를이용한일괄가설공법
신재료적용 High-performance material : steel, concrete Fiber Reinforced Polymer Repair material 고성능 : 고강도, 고내구성, 경량, 내부식성구조물적용 : 구조적특성값, 신뢰성, 경제성, 피로성능, 내구성검증필요
Hybrid Girder : 일반강재 + 고강도강재 4.77 0.8 바닥판 0.4 4.77 4.77 1.1 바닥판 0.4 0.8 0.8 바닥판 0.4 3.12 0.036 y 2.8 0.036 2.89 2.5 0.036 2.89 0.1 1.15 0.1 1.15 하부바닥판 0.4 0.1 1.15 하부바닥판 0.4 High-performance concrete : 고강도, 시공성개선등
Fiber Reinforced Polymer Type : Glass, Aramid, Carbon(Graphite), Boron Polyvinyl alcohol (PVA) FRP Reinforced Concrete FRP Bridge Decks/Superstructures FRP Cables FRP Prestressing FRP Bonded Repair
- Repair : strengthening, patching, thickening
합성구조교량및구조물
강합성거더교
합성트러스교 복부트러스 PSC 박스거더교량
파형강판복부교량 복부파형강판 PSC 박스거더교량
강재매입형강합성거더교 프리스트레스를도입하는강합성거더 - 프리플렉션 - 프리스트레스 - 변형을통한프리스트레스도입
강합성교각구조물 bc cy b cy b = bc bc b cz y tw tf c z h hc y tw tf h = hc y tf h = hc z z z 강형 타설을위한공간 충전콘트리트 충전콘크리트 합성기둥 타설효율을위한구멍들이있는격벽 외부보강재설치된강판
향후의교량신기술전망 신재료의적극적인활용 대형장비를이용한급속시공 다양한형태의연결구조개발 기존교량구조물의교체공법다양화 환경친화적인공법제시 Extreme Engineering
QUESTIONS?