(北京市建筑工程研究院 北京 100039)(北京市建筑设计研究院 北京 100045)
［提要］ 国家大剧院的水池结构属于超长结构，对超长水池结构的温度应力问题，除考虑了在配筋中增加普通温度钢筋，在混凝土材料中添加微膨胀剂和设置后浇带解决混凝土的收缩徐变等几种措施外,主要是采用了预应力的方法控制变形和抑制裂缝的产生。介绍了国家大剧院超长水池结构温度应力的计算、预应力的设计和施工要点。
［关键词］ 超长结构 温度应力 预应力
PRC Pool Structure in the National Grand Theatre/Tong Weimin1,Qin Jie1,Liu Jikang2 (1 Beijing Building Construction Research Institute,Beijing 100039，China; 2 Beijing Institute of Architectural Design & Research,Beijing 100045,China)
Abstract:The pool structure of the National Grand Theatre is an overlong concrete structure. To solve the problem of temperature stress，the method of prestressed concrete as well as the measures of adding steel bar or tiny expand material in concrete,or setting post cast strip,are used to decrease concrete shrink and creep.The stress and strain of structure in temperature field,the points of main influence of temperature stress,and the design and construction of the pool structure are discussed.
Keywords:overlong structure; temperature stress; prestress; concrete