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本文采用能量法对后张有粘结预应力连续梁中预应力次弯矩是否变化的问题进行了深入的研究，并与普通钢筋混凝土连续梁进行对比，基本上回答了有关次弯矩是否变化的问题。研究结果表明，在用增量法解预应力连续梁时，可以不必考虑初始次弯矩是否变化的问题，而将其作为一不变的量对待。因为随着外荷载的作用，次弯矩的独立概念已不复存在。其对加载过程的影响可以通过连续梁的刚度变化体现出来。
In this paper, the energy method is used to study whether the moment of prestressed secondary bending moment in the post-tensioned continuous prestressed beams is changed or not, and compared with the ordinary continuous-beam of reinforced concrete to basically answer the question whether the secondary moment changes The problem. The results show that, when using incremental method to solve the prestressed continuous beam, it can be treated as an invariable quantity without considering whether the initial moment of second moment changes. Because with the role of external load, the independent concept of secondary moment no longer exists. Its influence on the loading process can be reflected by the variation of the stiffness of the continuous beam.