(北京市建筑设计研究院，100045)

［提要］结合在2004至2005年所设计的国家体育总局训练局的举重篮球训练馆跨度30m的预应力大梁设计实践，重点总结了应用现有结构计算手段完成大跨度预应力梁结构方案设计的经验，结合施工中遇到的问题提出了合理设计预应力张拉顺序，改变截面形式来控制梁的裂缝和挠度的解决办法。对完工后工程进行现场实测，数据为今后相关工程的设计实践提供指导。

［关键词］体育馆，预应力，后张法，30m跨大梁

Design and Construction of the 30m span Post tensioned Boned Prestressed Concrete Beam in Gymnasium of Weight Lifting and Basketball of NSTC/Qin Yang，Zong Hai (Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract: According to the design of 30m-span beam of gymnasium of weight lifting and basketball of National Sports Training Center(NSTC) in 2004 and 2005, the design of a long-span post-tensioned boned prestressed concrete beam is analyzed by existing calculate method. The appropriate solutions to some problems that have been occurred during such a construction are given. The data that has been gathered from the gymnasium construction after its completion is analyzed, in oreer to provide some practical solutions for future design in similar constructions.

Keywords: gymnasium; prestress; post tensioned method; 30m-span concrete beam