由于部分预应力构件在我国的应用还不够普及,本文的目的是想起一点促进作用。在这一讲中主要介绍部分预应力混凝土构件在国内外的研究发展概况,并结合我国1985年颁发的《公路钢筋混凝土及预应力混凝土桥涵设计规范》叙述了部分预应力的分类定义、受力特点、设计及计算要点,并通过实例计算演示了受弯构件设计验算的一般步骤。 As the application of some prestressed components in our country is not yet universal enough, the purpose of this paper is to think of a little promotion. In this lecture, we mainly introduce the research development of some prestressed concrete members at home and abroad and the classification definition of partial prestress with the “Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts” issued by China in 1985. Characteristics, design and calculation of the main points, and through the calculation of examples demonstrate the general steps of the design calculation of flexural members.