摘要
针对现有的体外预应力结构设计计算方法的不足,提出了将体外预应力桥梁视为由体外索构件和主梁构件构成的组合结构进行受力分析的计算方法。依据普通预应力混凝土梁截面配筋的估算方法对体内外混合配束梁的预应力筋(含体内及体外预应力)用量进行估算,阐述了体外预应力筋索力及偏心距的确定方法,并以白马垄体外预应力大桥为例进行了实桥的预应力筋(含体内及体外预应力)配置与结构验算。
A new calculation method is proposed after considering the deficiency of calculation method about external prestressing bridge. In the model, external prestressing bridge is considered as composite structure with external tendon and girder, which are interpreted as members to make structural mechanical analysis. Based on the prestressing configuration method of common prestressed concrete, a rough estimate of the amount of prestressing required for bridge with internal and external tendon is conducted. The paper presents the method of choosing the amount of tendon prestressing and eccentricity. Finally, the external tendon configuration and structure checking is done for Baimalong external prestressing bridge as an example.
出处
《长沙交通学院学报》
2006年第1期7-11,共5页
Journal of Changsha Communications University
基金
湖南省交通科技基金资助项目(200410)
关键词
预应力连续梁桥
体内外混合配束用量
偏心距
设计计算方法
prestressed continuous bridge
amount of internal and external tendon
eccentricity
design and calculation method
