一种新颖的预应力混凝土结构的设计理论及应用

Design Theories and Application of a Novel Prestressed Concrete Structures with the Same Tendon in Internality and Externality

针对在建筑物加固与改造过程中出现的一种新颖的体内外同索的预应力结构给出了其设计计算理论。文章首先简要介绍了体内外同索的概念,分析了这种结构体系处理通常增层改造过程中出现的问题的优点,然后给出了这种新颖的预应力结构预应力损失的计算方法,推导了这种结构承载力极限状态的计算公式。文章最后通过实例计算验证了设计计算理论。

The design and calculation theories of a novel Prestressed Concrete Structures With the same tendon in Internality and Externality are presented . Generally, such structure systems are applied to strenthen and retrofit building. First, the general conception on the same tendon in Internality and Externality is introduced briefly, and the advantage of using such structure systems to deal with the problem which meeted in the process of a retrofit building engineering is also analyzed .Then, the methods to calculate the loss of prestressing of the same tendons was given. What＇ s the more, the caculation formulas of the ultimate bearing capacity are also deduced. In the end, an example is given in order to verification the design and calculation theories.