公路交通技术
公路交通技術
공로교통기술
TECHNOLOGY OF HIGHWAY AND TRANSPORT
2015年
3期
47-51
,共5页
斜拉桥%后期束%优化%应力
斜拉橋%後期束%優化%應力
사랍교%후기속%우화%응력
cable-stayed bridge%late tendon%optimization%stress
斜拉桥的发展趋势是跨径超大化、结构轻型化，使其结构受力性能更为复杂，其受力性能的进一步优化显得尤为重要。以混凝土梁预应力理论为基础，选择六冲河主跨438 m大跨径双塔斜拉桥作为研究对象，对斜拉桥中最典型的大跨径双塔斜拉桥的预应力后期束配置进行优化研究，运用大型有限元计算软件Midas Civil对不同预应力度下的结构进行计算，分析其受力性能，使其在结构受力性能和经济性上更为合理，为混凝土斜拉桥预应力设计提供一定的参考。
斜拉橋的髮展趨勢是跨徑超大化、結構輕型化，使其結構受力性能更為複雜，其受力性能的進一步優化顯得尤為重要。以混凝土樑預應力理論為基礎，選擇六遲河主跨438 m大跨徑雙塔斜拉橋作為研究對象，對斜拉橋中最典型的大跨徑雙塔斜拉橋的預應力後期束配置進行優化研究，運用大型有限元計算軟件Midas Civil對不同預應力度下的結構進行計算，分析其受力性能，使其在結構受力性能和經濟性上更為閤理，為混凝土斜拉橋預應力設計提供一定的參攷。
사랍교적발전추세시과경초대화、결구경형화，사기결구수력성능경위복잡，기수력성능적진일보우화현득우위중요。이혼응토량예응력이론위기출，선택륙충하주과438 m대과경쌍탑사랍교작위연구대상，대사랍교중최전형적대과경쌍탑사랍교적예응력후기속배치진행우화연구，운용대형유한원계산연건Midas Civil대불동예응력도하적결구진행계산，분석기수력성능，사기재결구수력성능화경제성상경위합리，위혼응토사랍교예응력설계제공일정적삼고。
At present,the cable-stayed bridges exhibit a development tendency of super-large span and lighter structure,enabling mechanical performance of structures to be more complicated,therefore,further optimization of mechanical performance shows particular importance. On the basis of the theory of prestressed concrete beams,this paper selects Liuchong River Large-span Double-tower Cable-stayed Bridge at a main span of 438m as the object of research to conduct optimization research on configuration of prestressed late tendons of the most typical large-span double -tower cable -stayed bridges in cable -stayed bridges,and calculates structures under different degrees of prestress by means of large-scale finite element computational software Midas Civil and analyzes its mechanical performance with the purposes of realizing more reasonable mechanical performance of structures and economy so as to provide a certain reference for prestress design of concrete cable-stayed bridges.
