Abstract: A technology called external prestressing is being developed in some countries these years. Based on the technology at home and abroad, this paper presents the advantages and design theory of external prestressed structure and the distribution and corrosion-preventing technique of external cable. Meanwhile, some problems to be solved in future are pointed out.

摘要： 近年来,一些国家正在发展一种称为体外预应力的预应力混凝土技术。本文综合国内外的情况,着重介绍了体外预应力结构的优点、设计理论、体外钢索的布置形式及其防腐工艺,指出了今后尚待解决的一些问题。