努力提高我国无粘结预应力混凝土结构设计施工水平刘永颐（中国建筑科学研究院建筑结构研究所）近年来，我国无粘结预应力混凝土技术发展十分迅速。工程实践证明，无粘结预应力混凝土能较好地适应高层建筑结构扩大开间，扩大柱同，降低建筑层高的要求。以深圳华民大厦为例... Efforts to Improve the Design and Construction Level of Unbonded Prestressed Concrete Structures in China Liu Yongji (Institute of Building Structure, China Academy of Building Research) In recent years, the development of unbonded prestressed concrete technology in China has developed rapidly. The engineering practice has proved that unbonded prestressed concrete can better adapt to the expansion of high-rise building structures, increase the number of columns, and reduce the requirements of building height. Take Huamin Mansion in Shenzhen as an example...