山区大跨度桥梁结构选型_姚昌荣

山区大跨度桥梁结构选型_姚昌荣

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1、桥梁建设年第卷第期(总第期  2012426217)Bridge ConstructionVol.42No.62012Totally No.217,,,()81文章编号:()1003-4722201206-0081-06山区大跨度桥梁结构选型1123姚昌荣东,李亚东,梁,王雪娇 西南交通大学桥梁工程系,四川成都西南交通大学峨眉校区土木系(;,1.6100312.四川峨眉中冶北方工程技术有限公司,辽宁大连6142023.116600;)摘要:为了使山区大跨度桥梁设计做到结构选型合理及方案可行,在综合考虑桥址处客观 条件、结构体系的受力特性和桥梁美学及景观基础上,从山区桥梁选型与造型

2、、桥位选择方面进行分析,并对山区桥梁常用结构形式的使用条件及合理跨径进行探讨。得出以下结论:山区桥梁选型原则为大桥凭规模,中桥可造型,小桥在细节;桥位选择原则为中、小桥梁严格服从线路布设,大桥、特大桥应多方案比选,并将其作为控制点,总体上达到与线路走向一致;山区公路、铁路大跨度桥梁首选是连续梁(刚构),对于较窄的V形沟谷优先考虑拱桥,在特殊地形条件下可选择斜拉桥和悬索桥。关键词:桥梁设计;山区;桥位选择;结构选型中图分类号文献标志码::U442.54AStructural Type Selection for LongSanp Bridges in Mountainous Reg

3、ion1123 ,,,YAO Chang-rongLI Ya-dongLIANG DongWANG Xue-jiao(,,,;1.Department of Bridge EngineeringChengdu 610031China2.De-Southwest Jiaotong Universitypartment of Civil EngineeringEmei 614202,,,,;Emei CampusSouthwest Jiaotong UniversityChina3.MCC Northern Engineering and Technology Co.,,,)Ltd.

4、Dalian 116600ChinaAbstractTo make sure that the structural types for the design of long span bridges in the:mountainous region can be rational and the structural schemes are feasiblethe structural type se-,lectionconfiguration and site selection of the bridges are analyzed and the service con

5、ditions and,rational span arrangement of the structural types commonly adopted for the bridges are studied onthe basis of comprehensive consideration of the existing site conditions,structural system forceconditionsaesthetics and landscape functions of the bridges.In accordance with the analy

6、sis and,studythe conclusions are drawn as followsthe principle of the structural type selection for a,:major bridge in the mountainous region is dominated by the scalefor a medium bridge is by the,configuration while for a small bridge is by the details.The principle of the site selection for

7、 thebridges in the mountainous region is that the arrangement of the medium and small bridges shouldstrictly abide by the route alignments,,,howeverfor the arrangement of the major bridgesthereshould multiple schemes for comparison and choice

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