世界桥梁
世界橋樑
세계교량
WORLD BRIDGE
2014年
3期
11-14
,共4页
T 形刚构桥%铁路桥%箱形梁%预应力混凝土结构%结构设计%有限元法%静力分析%动力分析
T 形剛構橋%鐵路橋%箱形樑%預應力混凝土結構%結構設計%有限元法%靜力分析%動力分析
T 형강구교%철로교%상형량%예응력혼응토결구%결구설계%유한원법%정력분석%동력분석
T-shaped rigid-frame bridge%railway bridge%box girder%prestressed concrete structure%structural design%finite element method%static analysis%dynamic analysis
关庙大桥为西康增建二线铁路的重点工程，采用（95＋95） m 预应力混凝土单 T 刚构桥，桥高近70 m ，大桥两侧连接隧道。主梁为单箱单室变高度直腹板箱形截面，为双向预应力体系，采用挂篮悬臂浇筑施工；桥墩采用矩形空心墩，墩高58 m ，墩顶及墩底分别设置5 m 和8 m 的实体段；桥墩基础采用16 m（长）×19 m（宽）×15 m（高）矩形明挖满灌混凝土扩大基础。采用有限元软件建立该桥模型，对结构进行静动力分析及车桥耦合动力仿真分析。分析结果表明，该桥结构变形、变位、应力及自振频率等指标均符合规范规定，单 T 刚构桥结构满足铁路运行安全要求。
關廟大橋為西康增建二線鐵路的重點工程，採用（95＋95） m 預應力混凝土單 T 剛構橋，橋高近70 m ，大橋兩側連接隧道。主樑為單箱單室變高度直腹闆箱形截麵，為雙嚮預應力體繫，採用掛籃懸臂澆築施工；橋墩採用矩形空心墩，墩高58 m ，墩頂及墩底分彆設置5 m 和8 m 的實體段；橋墩基礎採用16 m（長）×19 m（寬）×15 m（高）矩形明挖滿灌混凝土擴大基礎。採用有限元軟件建立該橋模型，對結構進行靜動力分析及車橋耦閤動力倣真分析。分析結果錶明，該橋結構變形、變位、應力及自振頻率等指標均符閤規範規定，單 T 剛構橋結構滿足鐵路運行安全要求。
관묘대교위서강증건이선철로적중점공정，채용（95＋95） m 예응력혼응토단 T 강구교，교고근70 m ，대교량측련접수도。주량위단상단실변고도직복판상형절면，위쌍향예응력체계，채용괘람현비요축시공；교돈채용구형공심돈，돈고58 m ，돈정급돈저분별설치5 m 화8 m 적실체단；교돈기출채용16 m（장）×19 m（관）×15 m（고）구형명알만관혼응토확대기출。채용유한원연건건립해교모형，대결구진행정동력분석급차교우합동력방진분석。분석결과표명，해교결구변형、변위、응력급자진빈솔등지표균부합규범규정，단 T 강구교결구만족철로운행안전요구。
The Guanmiao Bridge is a key part of the Second Xi′an-Ankang Railway Line .The bridge adopts the (95 + 95) m prestressed concrete single T-shaped rigid-frame structure . The bridge rises about 70 m and connects tunnels on both ends .The main girder adopts the single cell single box cross section with straight webs of variable depth ,which belongs to a two-way prestress system .The main girder was cast in situ by using form travelers .The pier is a rectangular hollow pier with a height of 58 m ,having a 5 m long solid top section and an 8 m long solid bottom sec-tion .The bridge foundation adopts the 16 m (length) × 19 m (width ) × 15 m (height )rectangular open excavation spread foundation filled fully with concrete .The finite element model of the bridge was built to carry out the static and dynamic analysis of the structure and the simulation analysis of vehicle-bridge coupling .The results of the analysis demonstrate that the deformation ,displace-ment ,stress and natural vibration of the bridge structure all meet the code requirements and the single T-shaped rigid-frame bridge is able to meet the service safety requirements of railway .
