在我国,预应力技术自上世纪五十年代中期开始应用于桥梁工程之中,经过几十年的理论发展和工程经验积累,目前已基本形成一套完整的、成熟的理论体系,并不断服务于桥梁工程的建设。本文通过介绍桥梁工程中预应力混凝土的特点与分类,让读者对预应力有一个较为系统的认识。 In our country, prestressed technology has been applied to bridge engineering since the mid-1950s. After decades of theoretical development and accumulation of engineering experience, a complete and mature theoretical system has been basically established and the service has been continuously provided Construction of bridge project. In this paper, by introducing the characteristics and classification of prestressed concrete in bridge engineering, the reader has a more systematic understanding of prestress.