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本文阐述了从早期预应力混凝土到现代预应力混凝土的设计概念的发展及部分预应力的广泛应用所提出的分类问题。概述了迄今体现在各国规范上的分类方法,并讨论了有关分类原则和设计准则。指出瑞士学派提出的按预应力力学度的方法分类及由此所取得的一系列的研究成果,有利于预应力混凝土及钢筋混凝土规范的统一。但目前从便于工程实践上的应用出发,仍按习用的应力状态分类,有利于部分预应力的推广应用。
This article describes the development of design concept from early prestressed concrete to modern prestressed concrete and the classification problem proposed by the application of partial prestress. An overview of the classification methods so far embodied in national norms has been given and the classification principles and design guidelines discussed. It is pointed out that the classification of the method according to the prestressing mechanics proposed by the Swiss school and the series of research results obtained therefrom are in favor of the unification of the prestressed concrete and the reinforced concrete. However, from the practical application of engineering practice, it is still classified according to the state of stress, is conducive to the promotion and application of some prestressed.