李相业
    (深圳中广核工程设计有限公司，深圳518057)

[摘要] 基于20m跨预应力转换桁架结构设计案例，介绍了转换桁架方案优化比选的情况，并对预应力构件的设计和施工进行了分析。相关思路和方法可供预应力转换桁架结构设计参考。
[关键词] 转换桁架；预应力混凝土；预应力损失；裂缝计算；后张法施工

    Conceptual design and optimization oflarge span prestressed transfer truss structure
    Li Xiangye
    (China Nuclear Power Design Company, LTD (SHEN ZHEN), Shenzhen 518057, China)

Abstract: By designing a 20m span transfer structure case, the comparison and optinuzation of the transfer truss project is introduced. The analysis of the prestress components design and construction is done. The method of prestressed transfer truss structure could be consulted in correlation design.
Keywords: transfer truss; prestressed concrete; prestress loss; crack check; post-tensioning method