在综述无粘结预应力混凝土结构工桎实践的基础上,指出尚需解决的一些实际问题。介绍了作者有针对性地开展的研究工作及取得的主要成果：（1)UPC框架模型的试验研究：（2)构件的M—Φ滞回曲线；（3) UPC结构的抗震性能》(4)建议放宽UPC构件应力限制系数。对这种结构的主要工程特性进行了分析和归 纳：即①UPC楼盖结构的特点;②UPC相对PC的主要优缺点;③UPC框架结构设计的注意事项。

Based on engineering practices of unbonded prestressed concrete (UPC), some questions are discussed. Main results about experiment research by writer are introduced. 1）Model test for UPC frame ； 2)M-Φcurve of member5 ;3)Earthquake property of UPC frame; 4)Design suggest to increase stress coefficient of concrete crack. Engineering property of UPC is analyzed and induced. 1)Characteristic of UPC floor system； 2) Advantage and defect of UPC than PC; 3)Key to structure design of UPC frame.